🎯 Sync smart & scheduler codes (#8537)

Signed-off-by: Shell <smokewood@qq.com>
Co-authored-by: xqyjlj <xqyjlj@126.com>

bsp/qemu-vexpress-a9/applications/main.c

@@ -10,11 +10,11 @@
 
 #include <stdint.h>
 #include <stdio.h>
-#include <stdlib.h>
+#include <rtthread.h>
 
 int main(void)
 {
-    printf("Hello RT-Thread!\n");
+    rt_kprintf("Hello RT-Thread!\n");
 
     return 0;
 }

bsp/qemu-vexpress-a9/drivers/secondary_cpu.c

@@ -47,7 +47,7 @@ void rt_hw_secondary_cpu_up(void)
     *plat_boot_reg-- = (void *)(size_t)-1;
     *plat_boot_reg = (void *)entry;
     rt_hw_dsb();
-    rt_hw_ipi_send(0, 1 << 1);
+    rt_hw_ipi_send(0, RT_CPU_MASK ^ (1 << rt_hw_cpu_id()));
 }
 
 /* Interface */

components/dfs/dfs_v2/filesystems/romfs/dfs_romfs.c

@@ -352,7 +352,7 @@ static int dfs_romfs_getdents(struct dfs_file *file, struct dirent *dirp, uint32
 
         d->d_namlen = rt_strlen(name);
         d->d_reclen = (rt_uint16_t)sizeof(struct dirent);
-        rt_strncpy(d->d_name, name, DFS_PATH_MAX);
+        rt_strncpy(d->d_name, name, DIRENT_NAME_MAX);
 
         /* move to next position */
         ++ file->fpos;

components/dfs/dfs_v2/src/dfs_pcache.c

@@ -822,7 +822,10 @@ static int dfs_page_insert(struct dfs_page *page)
     rt_list_insert_before(&aspace->list_inactive, &page->space_node);
     aspace->pages_count ++;
 
-    RT_ASSERT(_dfs_page_insert(aspace, page) == 0);
+    if (_dfs_page_insert(aspace, page))
+    {
+        RT_ASSERT(0);
+    }
 
     if (aspace->pages_count > RT_PAGECACHE_ASPACE_COUNT)
     {

components/drivers/audio/audio_pipe.c

@@ -21,9 +21,7 @@ static void _rt_pipe_resume_writer(struct rt_audio_pipe *pipe)
         RT_ASSERT(pipe->flag & RT_PIPE_FLAG_BLOCK_WR);
 
         /* get suspended thread */
-        thread = rt_list_entry(pipe->suspended_write_list.next,
+        thread = RT_THREAD_LIST_NODE_ENTRY(pipe->suspended_write_list.next);
-                               struct rt_thread,
-                               tlist);
 
         /* resume the write thread */
         rt_thread_resume(thread);
@@ -73,7 +71,7 @@ static rt_ssize_t rt_pipe_read(rt_device_t dev,
             rt_thread_suspend(thread);
             /* waiting on suspended read list */
             rt_list_insert_before(&(pipe->suspended_read_list),
-                                  &(thread->tlist));
+                                  &RT_THREAD_LIST_NODE(thread));
             rt_hw_interrupt_enable(level);
 
             rt_schedule();
@@ -103,9 +101,7 @@ static void _rt_pipe_resume_reader(struct rt_audio_pipe *pipe)
         RT_ASSERT(pipe->flag & RT_PIPE_FLAG_BLOCK_RD);
 
         /* get suspended thread */
-        thread = rt_list_entry(pipe->suspended_read_list.next,
+        thread = RT_THREAD_LIST_NODE_ENTRY(pipe->suspended_read_list.next);
-                               struct rt_thread,
-                               tlist);
 
         /* resume the read thread */
         rt_thread_resume(thread);
@@ -161,7 +157,7 @@ static rt_ssize_t rt_pipe_write(rt_device_t dev,
             rt_thread_suspend(thread);
             /* waiting on suspended read list */
             rt_list_insert_before(&(pipe->suspended_write_list),
-                                  &(thread->tlist));
+                                  &RT_THREAD_LIST_NODE(thread));
             rt_hw_interrupt_enable(level);
 
             rt_schedule();

components/drivers/include/ipc/completion.h

@@ -13,18 +13,22 @@
 #include <rtconfig.h>
 
 /**
- * Completion
+ * Completion - A tiny IPC implementation for resource-constrained scenarios
+ *
+ * It's an IPC using one CPU word with the encoding:
+ *
+ * BIT      | MAX-1 ----------------- 1 |       0        |
+ * CONTENT  |   suspended_thread & ~1   | completed flag |
  */
 
 struct rt_completion
 {
-    rt_uint32_t flag;
+    /* suspended thread, and completed flag */
-
+    rt_base_t susp_thread_n_flag;
-    /* suspended list */
-    rt_list_t suspended_list;
-    struct rt_spinlock spinlock;
 };
 
+#define RT_COMPLETION_INIT(comp) {0}
+
 void rt_completion_init(struct rt_completion *completion);
 rt_err_t rt_completion_wait(struct rt_completion *completion,
                             rt_int32_t            timeout);

components/drivers/ipc/SConscript

@@ -8,6 +8,6 @@ if not GetDepend('RT_USING_HEAP'):
     SrcRemove(src, 'dataqueue.c')
     SrcRemove(src, 'pipe.c')
 
-group = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_DEVICE_IPC'], CPPPATH = CPPPATH)
+group = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_DEVICE_IPC'], CPPPATH = CPPPATH, LOCAL_CPPDEFINES=['__RT_IPC_SOURCE__'])
 
 Return('group')

components/drivers/ipc/completion.c

@@ -8,13 +8,24 @@
  * 2012-09-30     Bernard      first version.
  * 2021-08-18     chenyingchun add comments
  * 2023-09-15     xqyjlj       perf rt_hw_interrupt_disable/enable
+ * 2024-01-25     Shell        reduce resource usage in completion for better synchronization
+ *                             and smaller footprint.
  */
 
+#define DBG_TAG           "drivers.ipc"
+#define DBG_LVL           DBG_INFO
+#include <rtdbg.h>
+
 #include <rthw.h>
 #include <rtdevice.h>
 
 #define RT_COMPLETED    1
 #define RT_UNCOMPLETED  0
+#define RT_COMPLETION_FLAG(comp) ((comp)->susp_thread_n_flag & 1)
+#define RT_COMPLETION_THREAD(comp) ((rt_thread_t)((comp)->susp_thread_n_flag & ~1))
+#define RT_COMPLETION_NEW_STAT(thread, flag) (((flag) & 1) | (((rt_base_t)thread) & ~1))
+
+static struct rt_spinlock _completion_lock = RT_SPINLOCK_INIT;
 
 /**
  * @brief This function will initialize a completion object.
@@ -23,14 +34,9 @@
  */
 void rt_completion_init(struct rt_completion *completion)
 {
-    rt_base_t level;
     RT_ASSERT(completion != RT_NULL);
 
-    rt_spin_lock_init(&(completion->spinlock));
+    completion->susp_thread_n_flag = RT_COMPLETION_NEW_STAT(RT_NULL, RT_UNCOMPLETED);
-    level = rt_spin_lock_irqsave(&(completion->spinlock));
-    completion->flag = RT_UNCOMPLETED;
-    rt_list_init(&completion->suspended_list);
-    rt_spin_unlock_irqrestore(&(completion->spinlock), level);
 }
 RTM_EXPORT(rt_completion_init);
 
@@ -64,11 +70,11 @@ rt_err_t rt_completion_wait(struct rt_completion *completion,
     result = RT_EOK;
     thread = rt_thread_self();
 
-    level = rt_spin_lock_irqsave(&(completion->spinlock));
+    level = rt_spin_lock_irqsave(&_completion_lock);
-    if (completion->flag != RT_COMPLETED)
+    if (RT_COMPLETION_FLAG(completion) != RT_COMPLETED)
     {
         /* only one thread can suspend on complete */
-        RT_ASSERT(rt_list_isempty(&(completion->suspended_list)));
+        RT_ASSERT(RT_COMPLETION_THREAD(completion) == RT_NULL);
 
         if (timeout == 0)
         {
@@ -81,10 +87,11 @@ rt_err_t rt_completion_wait(struct rt_completion *completion,
             thread->error = RT_EOK;
 
             /* suspend thread */
-            rt_thread_suspend_with_flag(thread, RT_UNINTERRUPTIBLE);
+            result = rt_thread_suspend_with_flag(thread, RT_UNINTERRUPTIBLE);
-            /* add to suspended list */
+            if (result == RT_EOK)
-            rt_list_insert_before(&(completion->suspended_list),
+            {
-                                  &(thread->tlist));
+                /* add to suspended thread */
+                completion->susp_thread_n_flag = RT_COMPLETION_NEW_STAT(thread, RT_UNCOMPLETED);
 
                 /* current context checking */
                 RT_DEBUG_NOT_IN_INTERRUPT;
@@ -99,7 +106,7 @@ rt_err_t rt_completion_wait(struct rt_completion *completion,
                     rt_timer_start(&(thread->thread_timer));
                 }
                 /* enable interrupt */
-            rt_spin_unlock_irqrestore(&(completion->spinlock), level);
+                rt_spin_unlock_irqrestore(&_completion_lock, level);
 
                 /* do schedule */
                 rt_schedule();
@@ -107,14 +114,16 @@ rt_err_t rt_completion_wait(struct rt_completion *completion,
                 /* thread is waked up */
                 result = thread->error;
 
-            level = rt_spin_lock_irqsave(&(completion->spinlock));
+                level = rt_spin_lock_irqsave(&_completion_lock);
             }
         }
-    /* clean completed flag */
+    }
-    completion->flag = RT_UNCOMPLETED;
+
+    /* clean completed flag & remove susp_thread on the case of waking by timeout */
+    completion->susp_thread_n_flag = RT_COMPLETION_NEW_STAT(RT_NULL, RT_UNCOMPLETED);
 
 __exit:
-    rt_spin_unlock_irqrestore(&(completion->spinlock), level);
+    rt_spin_unlock_irqrestore(&_completion_lock, level);
 
     return result;
 }
@@ -128,35 +137,33 @@ RTM_EXPORT(rt_completion_wait);
 void rt_completion_done(struct rt_completion *completion)
 {
     rt_base_t level;
+    rt_err_t error;
+    rt_thread_t suspend_thread;
     RT_ASSERT(completion != RT_NULL);
 
-    if (completion->flag == RT_COMPLETED)
+    level = rt_spin_lock_irqsave(&_completion_lock);
+    if (RT_COMPLETION_FLAG(completion) == RT_COMPLETED)
+    {
+        rt_spin_unlock_irqrestore(&_completion_lock, level);
         return;
+    }
 
-    level = rt_spin_lock_irqsave(&(completion->spinlock));
+    suspend_thread = RT_COMPLETION_THREAD(completion);
-    completion->flag = RT_COMPLETED;
+    if (suspend_thread)
-
-    if (!rt_list_isempty(&(completion->suspended_list)))
     {
         /* there is one thread in suspended list */
-        struct rt_thread *thread;
-
-        /* get thread entry */
-        thread = rt_list_entry(completion->suspended_list.next,
-                               struct rt_thread,
-                               tlist);
 
         /* resume it */
-        rt_thread_resume(thread);
+        error = rt_thread_resume(suspend_thread);
-        rt_spin_unlock_irqrestore(&(completion->spinlock), level);
+        if (error)
-
-        /* perform a schedule */
-        rt_schedule();
-    }
-    else
         {
-        rt_spin_unlock_irqrestore(&(completion->spinlock), level);
+            LOG_D("%s: failed to resume thread", __func__);
         }
     }
+
+    completion->susp_thread_n_flag = RT_COMPLETION_NEW_STAT(RT_NULL, RT_COMPLETED);
+
+    rt_spin_unlock_irqrestore(&_completion_lock, level);
+}
 RTM_EXPORT(rt_completion_done);
 

components/drivers/ipc/dataqueue.c

@@ -8,6 +8,7 @@
  * 2012-09-30     Bernard      first version.
  * 2016-10-31     armink       fix some resume push and pop thread bugs
  * 2023-09-15     xqyjlj       perf rt_hw_interrupt_disable/enable
+ * 2024-01-25     Shell        porting to susp_list API
  */
 
 #include <rthw.h>
@@ -121,8 +122,10 @@ rt_err_t rt_data_queue_push(struct rt_data_queue *queue,
         thread->error = RT_EOK;
 
         /* suspend thread on the push list */
-        rt_thread_suspend_with_flag(thread, RT_UNINTERRUPTIBLE);
+        result = rt_thread_suspend_to_list(thread, &queue->suspended_push_list,
-        rt_list_insert_before(&(queue->suspended_push_list), &(thread->tlist));
+                                           RT_IPC_FLAG_FIFO, RT_UNINTERRUPTIBLE);
+        if (result == RT_EOK)
+        {
             /* start timer */
             if (timeout > 0)
             {
@@ -140,8 +143,11 @@ rt_err_t rt_data_queue_push(struct rt_data_queue *queue,
             rt_schedule();
 
             /* thread is waked up */
-        result = thread->error;
             level = rt_spin_lock_irqsave(&(queue->spinlock));
+
+            /* error may be modified by waker, so take the lock before accessing it */
+            result = thread->error;
+        }
         if (result != RT_EOK) goto __exit;
     }
 
@@ -159,15 +165,10 @@ rt_err_t rt_data_queue_push(struct rt_data_queue *queue,
     }
 
     /* there is at least one thread in suspended list */
-    if (!rt_list_isempty(&(queue->suspended_pop_list)))
+    if (rt_susp_list_dequeue(&queue->suspended_push_list,
+                             RT_THREAD_RESUME_RES_THR_ERR))
     {
-        /* get thread entry */
+        /* unlock and perform a schedule */
-        thread = rt_list_entry(queue->suspended_pop_list.next,
-                               struct rt_thread,
-                               tlist);
-
-        /* resume it */
-        rt_thread_resume(thread);
         rt_spin_unlock_irqrestore(&(queue->spinlock), level);
 
         /* perform a schedule */
@@ -239,8 +240,10 @@ rt_err_t rt_data_queue_pop(struct rt_data_queue *queue,
         thread->error = RT_EOK;
 
         /* suspend thread on the pop list */
-        rt_thread_suspend_with_flag(thread, RT_UNINTERRUPTIBLE);
+        result = rt_thread_suspend_to_list(thread, &queue->suspended_pop_list,
-        rt_list_insert_before(&(queue->suspended_pop_list), &(thread->tlist));
+                                           RT_IPC_FLAG_FIFO, RT_UNINTERRUPTIBLE);
+        if (result == RT_EOK)
+        {
             /* start timer */
             if (timeout > 0)
             {
@@ -258,11 +261,12 @@ rt_err_t rt_data_queue_pop(struct rt_data_queue *queue,
             rt_schedule();
 
             /* thread is waked up */
-        result = thread->error;
             level  = rt_spin_lock_irqsave(&(queue->spinlock));
+            result = thread->error;
             if (result != RT_EOK)
                 goto __exit;
         }
+    }
 
     *data_ptr = queue->queue[queue->get_index].data_ptr;
     *size     = queue->queue[queue->get_index].data_size;
@@ -280,15 +284,10 @@ rt_err_t rt_data_queue_pop(struct rt_data_queue *queue,
     if (rt_data_queue_len(queue) <= queue->lwm)
     {
         /* there is at least one thread in suspended list */
-        if (!rt_list_isempty(&(queue->suspended_push_list)))
+        if (rt_susp_list_dequeue(&queue->suspended_push_list,
+                                       RT_THREAD_RESUME_RES_THR_ERR))
         {
-            /* get thread entry */
+            /* unlock and perform a schedule */
-            thread = rt_list_entry(queue->suspended_push_list.next,
-                                   struct rt_thread,
-                                   tlist);
-
-            /* resume it */
-            rt_thread_resume(thread);
             rt_spin_unlock_irqrestore(&(queue->spinlock), level);
 
             /* perform a schedule */
@@ -364,7 +363,6 @@ RTM_EXPORT(rt_data_queue_peek);
 void rt_data_queue_reset(struct rt_data_queue *queue)
 {
     rt_base_t level;
-    struct rt_thread *thread;
 
     RT_ASSERT(queue != RT_NULL);
     RT_ASSERT(queue->magic == DATAQUEUE_MAGIC);
@@ -382,52 +380,13 @@ void rt_data_queue_reset(struct rt_data_queue *queue)
     /* wakeup all suspend threads */
 
     /* resume on pop list */
-    while (!rt_list_isempty(&(queue->suspended_pop_list)))
+    rt_susp_list_resume_all_irq(&queue->suspended_pop_list, RT_ERROR,
-    {
+                                &(queue->spinlock));
-        /* disable interrupt */
-        level = rt_spin_lock_irqsave(&(queue->spinlock));
-
-        /* get next suspend thread */
-        thread = rt_list_entry(queue->suspended_pop_list.next,
-                               struct rt_thread,
-                               tlist);
-        /* set error code to -RT_ERROR */
-        thread->error = -RT_ERROR;
-
-        /*
-         * resume thread
-         * In rt_thread_resume function, it will remove current thread from
-         * suspend list
-         */
-        rt_thread_resume(thread);
-
-        /* enable interrupt */
-        rt_spin_unlock_irqrestore(&(queue->spinlock), level);
-    }
 
     /* resume on push list */
-    while (!rt_list_isempty(&(queue->suspended_push_list)))
+    rt_susp_list_resume_all_irq(&queue->suspended_push_list, RT_ERROR,
-    {
+                                &(queue->spinlock));
-        /* disable interrupt */
-        level = rt_spin_lock_irqsave(&(queue->spinlock));
 
-        /* get next suspend thread */
-        thread = rt_list_entry(queue->suspended_push_list.next,
-                               struct rt_thread,
-                               tlist);
-        /* set error code to -RT_ERROR */
-        thread->error = -RT_ERROR;
-
-        /*
-         * resume thread
-         * In rt_thread_resume function, it will remove current thread from
-         * suspend list
-         */
-        rt_thread_resume(thread);
-
-        /* enable interrupt */
-        rt_spin_unlock_irqrestore(&(queue->spinlock), level);
-    }
     rt_exit_critical();
 
     rt_schedule();

components/drivers/ipc/workqueue.c

@@ -64,7 +64,10 @@ static void _workqueue_thread_entry(void *parameter)
         {
             /* no software timer exist, suspend self. */
             rt_thread_suspend_with_flag(rt_thread_self(), RT_UNINTERRUPTIBLE);
+
+            /* release lock after suspend so we will not lost any wakeups */
             rt_spin_unlock_irqrestore(&(queue->spinlock), level);
+
             rt_schedule();
             continue;
         }
@@ -105,13 +108,11 @@ static rt_err_t _workqueue_submit_work(struct rt_workqueue *queue,
         work->workqueue = queue;
 
         /* whether the workqueue is doing work */
-        if (queue->work_current == RT_NULL &&
+        if (queue->work_current == RT_NULL)
-                ((queue->work_thread->stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK))
         {
-            /* resume work thread */
+            /* resume work thread, and do a re-schedule if succeed */
             rt_thread_resume(queue->work_thread);
             rt_spin_unlock_irqrestore(&(queue->spinlock), level);
-            rt_schedule();
         }
         else
         {
@@ -187,13 +188,11 @@ static void _delayed_work_timeout_handler(void *parameter)
         work->flags |= RT_WORK_STATE_PENDING;
     }
     /* whether the workqueue is doing work */
-    if (queue->work_current == RT_NULL &&
+    if (queue->work_current == RT_NULL)
-            ((queue->work_thread->stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK))
     {
-        /* resume work thread */
+        /* resume work thread, and do a re-schedule if succeed */
         rt_thread_resume(queue->work_thread);
         rt_spin_unlock_irqrestore(&(queue->spinlock), level);
-        rt_schedule();
     }
     else
     {
@@ -346,13 +345,11 @@ rt_err_t rt_workqueue_urgent_work(struct rt_workqueue *queue, struct rt_work *wo
     rt_list_remove(&(work->list));
     rt_list_insert_after(&queue->work_list, &(work->list));
     /* whether the workqueue is doing work */
-    if (queue->work_current == RT_NULL &&
+    if (queue->work_current == RT_NULL)
-            ((queue->work_thread->stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK))
     {
-        /* resume work thread */
+        /* resume work thread, and do a re-schedule if succeed */
         rt_thread_resume(queue->work_thread);
         rt_spin_unlock_irqrestore(&(queue->spinlock), level);
-        rt_schedule();
     }
     else
     {

components/finsh/cmd.c

@@ -216,15 +216,23 @@ long list_thread(void)
                     rt_uint8_t *ptr;
 
 #ifdef RT_USING_SMP
-                    if (thread->oncpu != RT_CPU_DETACHED)
+                    /* no synchronization applied since it's only for debug */
-                        rt_kprintf("%-*.*s %3d %3d %4d ", maxlen, RT_NAME_MAX, thread->parent.name, thread->oncpu, thread->bind_cpu, thread->current_priority);
+                    if (RT_SCHED_CTX(thread).oncpu != RT_CPU_DETACHED)
+                        rt_kprintf("%-*.*s %3d %3d %4d ", maxlen, RT_NAME_MAX,
+                                   thread->parent.name, RT_SCHED_CTX(thread).oncpu,
+                                   RT_SCHED_CTX(thread).bind_cpu,
+                                   RT_SCHED_PRIV(thread).current_priority);
                     else
-                        rt_kprintf("%-*.*s N/A %3d %4d ", maxlen, RT_NAME_MAX, thread->parent.name, thread->bind_cpu, thread->current_priority);
+                        rt_kprintf("%-*.*s N/A %3d %4d ", maxlen, RT_NAME_MAX,
+                                   thread->parent.name,
+                                   RT_SCHED_CTX(thread).bind_cpu,
+                                   RT_SCHED_PRIV(thread).current_priority);
 
 #else
-                    rt_kprintf("%-*.*s %3d ", maxlen, RT_NAME_MAX, thread->parent.name, thread->current_priority);
+                    /* no synchronization applied since it's only for debug */
+                    rt_kprintf("%-*.*s %3d ", maxlen, RT_NAME_MAX, thread->parent.name, RT_SCHED_PRIV(thread).current_priority);
 #endif /*RT_USING_SMP*/
-                    stat = (thread->stat & RT_THREAD_STAT_MASK);
+                    stat = (RT_SCHED_CTX(thread).stat & RT_THREAD_STAT_MASK);
                     if (stat == RT_THREAD_READY)        rt_kprintf(" ready  ");
                     else if ((stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK) rt_kprintf(" suspend");
                     else if (stat == RT_THREAD_INIT)    rt_kprintf(" init   ");
@@ -250,7 +258,7 @@ long list_thread(void)
                                thread->stack_size,
                                (thread->stack_size - ((rt_ubase_t) ptr - (rt_ubase_t) thread->stack_addr)) * 100
                                / thread->stack_size,
-                               thread->remaining_tick,
+                               RT_SCHED_PRIV(thread).remaining_tick,
                                rt_strerror(thread->error),
                                thread);
 #endif
@@ -263,21 +271,6 @@ long list_thread(void)
     return 0;
 }
 
-static void show_wait_queue(struct rt_list_node *list)
-{
-    struct rt_thread *thread;
-    struct rt_list_node *node;
-
-    for (node = list->next; node != list; node = node->next)
-    {
-        thread = rt_list_entry(node, struct rt_thread, tlist);
-        rt_kprintf("%.*s", RT_NAME_MAX, thread->parent.name);
-
-        if (node->next != list)
-            rt_kprintf("/");
-    }
-}
-
 #ifdef RT_USING_SEMAPHORE
 long list_sem(void)
 {
@@ -326,7 +319,7 @@ long list_sem(void)
                                sem->parent.parent.name,
                                sem->value,
                                rt_list_len(&sem->parent.suspend_thread));
-                    show_wait_queue(&(sem->parent.suspend_thread));
+                    rt_susp_list_print(&(sem->parent.suspend_thread));
                     rt_kprintf("\n");
                 }
                 else
@@ -395,7 +388,7 @@ long list_event(void)
                                e->parent.parent.name,
                                e->set,
                                rt_list_len(&e->parent.suspend_thread));
-                    show_wait_queue(&(e->parent.suspend_thread));
+                    rt_susp_list_print(&(e->parent.suspend_thread));
                     rt_kprintf("\n");
                 }
                 else
@@ -464,7 +457,7 @@ long list_mutex(void)
                            m->hold,
                            m->priority,
                            rt_list_len(&m->parent.suspend_thread));
-                    show_wait_queue(&(m->parent.suspend_thread));
+                    rt_susp_list_print(&(m->parent.suspend_thread));
                     rt_kprintf("\n");
                 }
                 else
@@ -537,7 +530,7 @@ long list_mailbox(void)
                                m->entry,
                                m->size,
                                rt_list_len(&m->parent.suspend_thread));
-                    show_wait_queue(&(m->parent.suspend_thread));
+                    rt_susp_list_print(&(m->parent.suspend_thread));
                     rt_kprintf("\n");
                 }
                 else
@@ -607,7 +600,7 @@ long list_msgqueue(void)
                                m->parent.parent.name,
                                m->entry,
                                rt_list_len(&m->parent.suspend_thread));
-                    show_wait_queue(&(m->parent.suspend_thread));
+                    rt_susp_list_print(&(m->parent.suspend_thread));
                     rt_kprintf("\n");
                 }
                 else
@@ -744,7 +737,7 @@ long list_mempool(void)
                                mp->block_total_count,
                                mp->block_free_count,
                                suspend_thread_count);
-                    show_wait_queue(&(mp->suspend_thread));
+                    rt_susp_list_print(&(mp->suspend_thread));
                     rt_kprintf("\n");
                 }
                 else

components/libc/compilers/common/include/sys/time.h

@@ -46,7 +46,17 @@ int8_t rt_tz_is_dst(void);
 
 struct itimerspec;
 
-#if defined(_GNU_SOURCE) && (defined(__x86_64__) || defined(__i386__))
+/* 'struct timeval' is defined on __x86_64__ toolchain */
+#if !defined(__x86_64__) && !defined(_TIMEVAL_DEFINED)
+#define _TIMEVAL_DEFINED
+struct timeval
+{
+    time_t      tv_sec;     /* seconds */
+    suseconds_t tv_usec;    /* and microseconds */
+};
+#endif /* _TIMEVAL_DEFINED */
+
+#if defined(_GNU_SOURCE) && (defined(__x86_64__) || defined(__i386__) || defined(RT_USING_SMART))
 /* linux x86 platform gcc use! */
 #define _TIMEVAL_DEFINED
 /* Values for the first argument to `getitimer' and `setitimer'.  */
@@ -71,16 +81,7 @@ struct itimerval
     /* Time to the next timer expiration.  */
     struct timeval it_value;
 };
-#endif /* defined(_GNU_SOURCE) && (defined(__x86_64__) || defined(__i386__)) */
+#endif /* defined(_GNU_SOURCE) && (defined(__x86_64__) || defined(__i386__)) || defined(RT_USING_SMART) */
-
-#ifndef _TIMEVAL_DEFINED
-#define _TIMEVAL_DEFINED
-struct timeval
-{
-    time_t      tv_sec;     /* seconds */
-    suseconds_t tv_usec;    /* and microseconds */
-};
-#endif /* _TIMEVAL_DEFINED */
 
 #if defined(__ARMCC_VERSION) || defined(_WIN32) || (defined(__ICCARM__) && (__VER__ < 8010001))
 struct timespec

components/libc/posix/libdl/dlmodule.c

@@ -203,7 +203,7 @@ void dlmodule_destroy_subthread(struct rt_dlmodule *module, rt_thread_t thread)
     rt_enter_critical();
 
     /* remove thread from thread_list (ready or defunct thread list) */
-    rt_list_remove(&(thread->tlist));
+    rt_list_remove(&RT_THREAD_LIST_NODE(thread));
 
     if ((thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_CLOSE &&
         (thread->thread_timer.parent.type == (RT_Object_Class_Static | RT_Object_Class_Timer)))

components/libc/posix/pthreads/pthread_cond.c

@@ -285,7 +285,7 @@ rt_err_t _pthread_cond_timedwait(pthread_cond_t *cond,
                 rt_thread_suspend(thread);
 
                 /* Only support FIFO */
-                rt_list_insert_before(&(sem->parent.suspend_thread), &(thread->tlist));
+                rt_list_insert_before(&(sem->parent.suspend_thread), &RT_THREAD_LIST_NODE(thread));
 
                 /**
                 rt_ipc_list_suspend(&(sem->parent.suspend_thread),

components/lwp/libc_musl.h

@@ -28,6 +28,22 @@
 
 #define FUTEX_CLOCK_REALTIME 256
 
+#define FUTEX_WAITERS    0x80000000
+#define FUTEX_OWNER_DIED 0x40000000
+#define FUTEX_TID_MASK   0x3fffffff
+
+struct robust_list
+{
+    struct robust_list *next;
+};
+
+struct robust_list_head
+{
+    struct robust_list list;
+    long futex_offset;
+    struct robust_list *list_op_pending;
+};
+
 /* for pmutex op */
 #define PMUTEX_INIT    0
 #define PMUTEX_LOCK    1

components/lwp/lwp.h

@@ -168,7 +168,6 @@ enum lwp_exit_request_type
 struct termios *get_old_termios(void);
 void lwp_setcwd(char *buf);
 char *lwp_getcwd(void);
-void lwp_request_thread_exit(rt_thread_t thread_to_exit);
 int  lwp_check_exit_request(void);
 void lwp_terminate(struct rt_lwp *lwp);
 
@@ -213,52 +212,10 @@ pid_t exec(char *filename, int debug, int argc, char **argv);
 /* ctime lwp API */
 int timer_list_free(rt_list_t *timer_list);
 
-struct rt_futex;
+rt_err_t lwp_futex_init(void);
-rt_err_t lwp_futex(struct rt_lwp *lwp, struct rt_futex *futex, int *uaddr, int op, int val, const struct timespec *timeout);
+rt_err_t lwp_futex(struct rt_lwp *lwp, int *uaddr, int op, int val,
+                   const struct timespec *timeout, int *uaddr2, int val3);
 
-#ifdef ARCH_MM_MMU
-struct __pthread {
-    /* Part 1 -- these fields may be external or
-     *      * internal (accessed via asm) ABI. Do not change. */
-    struct pthread *self;
-    uintptr_t *dtv;
-    struct pthread *prev, *next; /* non-ABI */
-    uintptr_t sysinfo;
-    uintptr_t canary, canary2;
-
-    /* Part 2 -- implementation details, non-ABI. */
-    int tid;
-    int errno_val;
-    volatile int detach_state;
-    volatile int cancel;
-    volatile unsigned char canceldisable, cancelasync;
-    unsigned char tsd_used:1;
-    unsigned char dlerror_flag:1;
-    unsigned char *map_base;
-    size_t map_size;
-    void *stack;
-    size_t stack_size;
-    size_t guard_size;
-    void *result;
-    struct __ptcb *cancelbuf;
-    void **tsd;
-    struct {
-        volatile void *volatile head;
-        long off;
-        volatile void *volatile pending;
-    } robust_list;
-    volatile int timer_id;
-    locale_t locale;
-    volatile int killlock[1];
-    char *dlerror_buf;
-    void *stdio_locks;
-
-    /* Part 3 -- the positions of these fields relative to
-     *      * the end of the structure is external and internal ABI. */
-    uintptr_t canary_at_end;
-    uintptr_t *dtv_copy;
-};
-#endif
 
 #ifdef __cplusplus
 }

components/lwp/lwp_futex_internal.h

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-11-01     Shell        Init ver.
+ */
+#ifndef __LWP_FUTEX_INTERNAL_H__
+#define __LWP_FUTEX_INTERNAL_H__
+
+#define DBG_TAG "lwp.futex"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+#include "rt_uthash.h"
+#include "lwp_internal.h"
+#include "lwp_pid.h"
+
+#include <rtthread.h>
+#include <lwp.h>
+
+#ifdef ARCH_MM_MMU
+#include <lwp_user_mm.h>
+#endif /* ARCH_MM_MMU */
+
+struct shared_futex_key
+{
+    rt_mem_obj_t mobj;
+    rt_base_t offset;
+};
+DEFINE_RT_UTHASH_TYPE(shared_futex_entry, struct shared_futex_key, key);
+
+struct rt_futex
+{
+    union {
+        /* for private futex */
+        struct lwp_avl_struct node;
+        /* for shared futex */
+        struct shared_futex_entry entry;
+    };
+
+    rt_list_t waiting_thread;
+    struct rt_object *custom_obj;
+    rt_mutex_t mutex;
+};
+typedef struct rt_futex *rt_futex_t;
+
+rt_err_t futex_global_table_add(struct shared_futex_key *key, rt_futex_t futex);
+rt_err_t futex_global_table_find(struct shared_futex_key *key, rt_futex_t *futex);
+rt_err_t futex_global_table_delete(struct shared_futex_key *key);
+
+#endif /* __LWP_FUTEX_INTERNAL_H__ */

components/lwp/lwp_futex_table.c

@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-11-01     Shell        Init ver.
+ */
+
+#include "lwp_futex_internal.h"
+
+static struct shared_futex_entry *_futex_hash_head;
+
+rt_err_t futex_global_table_add(struct shared_futex_key *key, rt_futex_t futex)
+{
+    rt_err_t rc = 0;
+    struct shared_futex_entry *entry = &futex->entry;
+    futex->entry.key.mobj = key->mobj;
+    futex->entry.key.offset = key->offset;
+
+    RT_UTHASH_ADD(_futex_hash_head, key, sizeof(struct shared_futex_key), entry);
+    return rc;
+}
+
+rt_err_t futex_global_table_find(struct shared_futex_key *key, rt_futex_t *futex)
+{
+    rt_err_t rc;
+    rt_futex_t found_futex;
+    struct shared_futex_entry *entry;
+
+    RT_UTHASH_FIND(_futex_hash_head, key, sizeof(struct shared_futex_key), entry);
+    if (entry)
+    {
+        rc = RT_EOK;
+        found_futex = rt_container_of(entry, struct rt_futex, entry);
+    }
+    else
+    {
+        rc = -RT_ENOENT;
+        found_futex = RT_NULL;
+    }
+
+    *futex = found_futex;
+    return rc;
+}
+
+rt_err_t futex_global_table_delete(struct shared_futex_key *key)
+{
+    rt_err_t rc;
+    struct shared_futex_entry *entry;
+
+    RT_UTHASH_FIND(_futex_hash_head, key, sizeof(struct shared_futex_key), entry);
+    if (entry)
+    {
+        RT_UTHASH_DELETE(_futex_hash_head, entry);
+        rc = RT_EOK;
+    }
+    else
+    {
+        rc = -RT_ENOENT;
+    }
+
+    return rc;
+}

components/lwp/lwp_internal.c

@@ -17,7 +17,7 @@
 
 static rt_err_t _mutex_take_safe(rt_mutex_t mtx, rt_int32_t timeout, rt_bool_t interruptable)
 {
-    DEF_RETURN_CODE(rc);
+    LWP_DEF_RETURN_CODE(rc);
     int retry;
     rt_int32_t effect_timeout;
 
@@ -92,19 +92,19 @@ static rt_err_t _mutex_take_safe(rt_mutex_t mtx, rt_int32_t timeout, rt_bool_t i
         RT_ASSERT(0);
     }
 
-    RETURN(rc);
+    LWP_RETURN(rc);
 }
 
 rt_err_t lwp_mutex_take_safe(rt_mutex_t mtx, rt_int32_t timeout, rt_bool_t interruptable)
 {
-    DEF_RETURN_CODE(rc);
+    LWP_DEF_RETURN_CODE(rc);
     rc = _mutex_take_safe(mtx, timeout, interruptable);
-    RETURN(rc);
+    LWP_RETURN(rc);
 }
 
 rt_err_t lwp_mutex_release_safe(rt_mutex_t mtx)
 {
-    DEF_RETURN_CODE(rc);
+    LWP_DEF_RETURN_CODE(rc);
 
     rc = rt_mutex_release(mtx);
     if (rc)
@@ -113,7 +113,7 @@ rt_err_t lwp_mutex_release_safe(rt_mutex_t mtx)
         rt_backtrace();
     }
 
-    RETURN(rc);
+    LWP_RETURN(rc);
 }
 
 rt_err_t lwp_critical_enter(struct rt_lwp *lwp)

components/lwp/lwp_internal.h

@@ -86,13 +86,13 @@ rt_err_t lwp_critical_exit(struct rt_lwp *lwp);
  * There tend to be chances where a return value is returned without correctly init
  */
 #ifndef LWP_DEBUG
-#define DEF_RETURN_CODE(name)   rt_err_t name
+#define LWP_DEF_RETURN_CODE(name)   rt_err_t name;RT_UNUSED(name)
-#define RETURN(name)            return name
+#define LWP_RETURN(name)            return name
 
 #else
 #define _LWP_UNINITIALIZED_RC   0xbeefcafe
-#define DEF_RETURN_CODE(name)   rt_err_t name = _LWP_UNINITIALIZED_RC
+#define LWP_DEF_RETURN_CODE(name)   rt_err_t name = _LWP_UNINITIALIZED_RC
-#define RETURN(name)            {RT_ASSERT(name != _LWP_UNINITIALIZED_RC);return name;}
+#define LWP_RETURN(name)            {RT_ASSERT(name != _LWP_UNINITIALIZED_RC);return name;}
 #endif /* LWP_DEBUG */
 
 #endif /* __LWP_INTERNAL_H__ */

components/lwp/lwp_ipc.c

@@ -8,7 +8,9 @@
  * 2019-10-12     Jesven       first version
  * 2023-07-25     Shell        Remove usage of rt_hw_interrupt API in the lwp
  * 2023-09-16     zmq810150896 Increased versatility of some features on dfs v2
+ * 2024-01-25     Shell        porting to susp_list API
  */
+#define __RT_IPC_SOURCE__
 
 #define DBG_TAG "lwp.ipc"
 #define DBG_LVL DBG_WARNING
@@ -124,11 +126,9 @@ rt_inline rt_err_t rt_channel_list_resume(rt_list_t *list)
     struct rt_thread *thread;
 
     /* get the first thread entry waiting for sending */
-    thread = rt_list_entry(list->next, struct rt_thread, tlist);
+    thread = rt_susp_list_dequeue(list, RT_THREAD_RESUME_RES_THR_ERR);
 
-    rt_thread_resume(thread);
+    return thread ? RT_EOK : -RT_ERROR;
-
-    return RT_EOK;
 }
 
 /**
@@ -136,15 +136,8 @@ rt_inline rt_err_t rt_channel_list_resume(rt_list_t *list)
  */
 rt_inline rt_err_t _channel_list_resume_all_locked(rt_list_t *list)
 {
-    struct rt_thread *thread;
-
     /* wakeup all suspended threads for sending */
-    while (!rt_list_isempty(list))
+    rt_susp_list_resume_all(list, RT_ERROR);
-    {
-        thread = rt_list_entry(list->next, struct rt_thread, tlist);
-        thread->error = -RT_ERROR;
-        rt_thread_resume(thread);
-    }
 
     return RT_EOK;
 }
@@ -155,12 +148,7 @@ rt_inline rt_err_t _channel_list_resume_all_locked(rt_list_t *list)
 rt_inline rt_err_t rt_channel_list_suspend(rt_list_t *list, struct rt_thread *thread)
 {
     /* suspend thread */
-    rt_err_t ret = rt_thread_suspend_with_flag(thread, RT_INTERRUPTIBLE);
+    rt_err_t ret = rt_thread_suspend_to_list(thread, list, RT_IPC_FLAG_FIFO, RT_INTERRUPTIBLE);
-
-    if (ret == RT_EOK)
-    {
-        rt_list_insert_before(list, &(thread->tlist)); /* list end */
-    }
 
     return ret;
 }
@@ -372,10 +360,13 @@ static rt_err_t wakeup_sender_wait_reply(void *object, struct rt_thread *thread)
 
 static void sender_timeout(void *parameter)
 {
+    rt_sched_lock_level_t slvl;
     struct rt_thread *thread = (struct rt_thread *)parameter;
     rt_channel_t ch;
 
-    ch = (rt_channel_t)(thread->wakeup.user_data);
+    rt_sched_lock(&slvl);
+
+    ch = (rt_channel_t)(thread->wakeup_handle.user_data);
     if (ch->stat == RT_IPC_STAT_ACTIVE && ch->reply == thread)
     {
         ch->stat = RT_IPC_STAT_IDLE;
@@ -399,14 +390,14 @@ static void sender_timeout(void *parameter)
             l = l->next;
         }
     }
-    thread->error = -RT_ETIMEOUT;
-    thread->wakeup.func = RT_NULL;
 
-    rt_list_remove(&(thread->tlist));
+    thread->wakeup_handle.func = RT_NULL;
+    thread->error = RT_ETIMEOUT;
+
     /* insert to schedule ready list */
-    rt_schedule_insert_thread(thread);
+    rt_sched_insert_thread(thread);
     /* do schedule */
-    rt_schedule();
+    rt_sched_unlock_n_resched(slvl);
 }
 
 /**
@@ -522,7 +513,7 @@ static rt_err_t _send_recv_timeout(rt_channel_t ch, rt_channel_msg_t data, int n
 
 static rt_err_t _do_send_recv_timeout(rt_channel_t ch, rt_channel_msg_t data, int need_reply, rt_channel_msg_t data_ret, rt_int32_t time, rt_ipc_msg_t msg)
 {
-    DEF_RETURN_CODE(rc);
+    LWP_DEF_RETURN_CODE(rc);
     rt_thread_t thread_recv;
     rt_thread_t thread_send = 0;
     void (*old_timeout_func)(void *) = 0;
@@ -627,9 +618,12 @@ static rt_err_t _do_send_recv_timeout(rt_channel_t ch, rt_channel_msg_t data, in
 
         if (!need_reply || rc == RT_EOK)
         {
-            thread_recv = rt_list_entry(ch->parent.suspend_thread.next, struct rt_thread, tlist);
+            rt_sched_lock_level_t slvl;
+            rt_sched_lock(&slvl);
+            thread_recv = RT_THREAD_LIST_NODE_ENTRY(ch->parent.suspend_thread.next);
             thread_recv->msg_ret = msg; /* to the first suspended receiver */
             thread_recv->error = RT_EOK;
+            rt_sched_unlock(slvl);
             rt_channel_list_resume(&ch->parent.suspend_thread);
         }
         break;
@@ -706,7 +700,7 @@ rt_err_t rt_raw_channel_send_recv_timeout(rt_channel_t ch, rt_channel_msg_t data
  */
 rt_err_t rt_raw_channel_reply(rt_channel_t ch, rt_channel_msg_t data)
 {
-    DEF_RETURN_CODE(rc);
+    LWP_DEF_RETURN_CODE(rc);
     rt_ipc_msg_t msg;
     struct rt_thread *thread;
     rt_base_t level;
@@ -758,7 +752,7 @@ rt_err_t rt_raw_channel_reply(rt_channel_t ch, rt_channel_msg_t data)
         rt_schedule();
     }
 
-    RETURN(rc);
+    LWP_RETURN(rc);
 }
 
 static rt_err_t wakeup_receiver(void *object, struct rt_thread *thread)
@@ -783,24 +777,27 @@ static void receiver_timeout(void *parameter)
 {
     struct rt_thread *thread = (struct rt_thread *)parameter;
     rt_channel_t ch;
-    rt_base_t level;
+    rt_sched_lock_level_t slvl;
 
-    ch = (rt_channel_t)(thread->wakeup.user_data);
+    rt_sched_lock(&slvl);
+
+    ch = (rt_channel_t)(thread->wakeup_handle.user_data);
 
-    level = rt_spin_lock_irqsave(&ch->slock);
-    ch->stat = RT_IPC_STAT_IDLE;
     thread->error = -RT_ETIMEOUT;
-    thread->wakeup.func = RT_NULL;
+    thread->wakeup_handle.func = RT_NULL;
 
-    rt_list_remove(&(thread->tlist));
+    rt_spin_lock(&ch->slock);
+    ch->stat = RT_IPC_STAT_IDLE;
+
+    rt_list_remove(&RT_THREAD_LIST_NODE(thread));
     /* insert to schedule ready list */
-    rt_schedule_insert_thread(thread);
+    rt_sched_insert_thread(thread);
 
     _rt_channel_check_wq_wakup_locked(ch);
-    rt_spin_unlock_irqrestore(&ch->slock, level);
+    rt_spin_unlock(&ch->slock);
 
     /* do schedule */
-    rt_schedule();
+    rt_sched_unlock_n_resched(slvl);
 }
 
 /**
@@ -808,7 +805,7 @@ static void receiver_timeout(void *parameter)
  */
 static rt_err_t _rt_raw_channel_recv_timeout(rt_channel_t ch, rt_channel_msg_t data, rt_int32_t time)
 {
-    DEF_RETURN_CODE(rc);
+    LWP_DEF_RETURN_CODE(rc);
     struct rt_thread *thread;
     rt_ipc_msg_t msg_ret;
     void (*old_timeout_func)(void *) = 0;
@@ -839,10 +836,12 @@ static rt_err_t _rt_raw_channel_recv_timeout(rt_channel_t ch, rt_channel_msg_t d
             rt_list_remove(ch->wait_msg.next); /* remove the message from the channel */
             if (msg_ret->need_reply)
             {
+                rt_sched_lock_level_t slvl;
+                rt_sched_lock(&slvl);
                 RT_ASSERT(ch->wait_thread.next != &ch->wait_thread);
-
+                thread = RT_THREAD_LIST_NODE_ENTRY(ch->wait_thread.next);
-                thread = rt_list_entry(ch->wait_thread.next, struct rt_thread, tlist);
                 rt_list_remove(ch->wait_thread.next);
+                rt_sched_unlock(slvl);
                 ch->reply = thread;            /* record the waiting sender */
                 ch->stat = RT_IPC_STAT_ACTIVE; /* no valid suspened receivers */
             }
@@ -912,7 +911,7 @@ static rt_err_t _rt_raw_channel_recv_timeout(rt_channel_t ch, rt_channel_msg_t d
 
     rt_spin_unlock_irqrestore(&ch->slock, level);
 
-    RETURN(rc);
+    LWP_RETURN(rc);
 }
 
 rt_err_t rt_raw_channel_recv(rt_channel_t ch, rt_channel_msg_t data)

components/lwp/lwp_itimer.c

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-11-30     Shell        Add itimer support
+ */
+
+#define _GNU_SOURCE
+#include <sys/time.h>
+#undef _GNU_SOURCE
+
+#define DBG_TAG "lwp.signal"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <string.h>
+
+#include "lwp_internal.h"
+#include "sys/signal.h"
+#include "syscall_generic.h"
+
+rt_err_t lwp_signal_setitimer(rt_lwp_t lwp, int which, const struct itimerspec *restrict new, struct itimerspec *restrict old)
+{
+    rt_err_t rc = RT_EOK;
+    timer_t timerid = 0;
+    int flags = 0;
+
+    if (lwp->signal.real_timer == LWP_SIG_INVALID_TIMER)
+    {
+        struct sigevent sevp = {
+            .sigev_signo = SIGALRM,
+            .sigev_notify = SIGEV_SIGNAL,
+        };
+
+        rc = timer_create(CLOCK_REALTIME_ALARM, &sevp, &timerid);
+        if (rc == RT_EOK)
+        {
+            RT_ASSERT(timerid != LWP_SIG_INVALID_TIMER);
+            lwp->signal.real_timer = timerid;
+        }
+        else
+        {
+            /* failed to create timer */
+        }
+    }
+    else
+    {
+        timerid = lwp->signal.real_timer;
+    }
+
+    if (rc == RT_EOK)
+    {
+        switch (which)
+        {
+            case ITIMER_REAL:
+                rc = timer_settime(timerid, flags, new, old);
+                break;
+            default:
+                rc = -ENOSYS;
+                LOG_W("%s() unsupported timer", __func__);
+                break;
+        }
+    }
+
+    return rc;
+}

components/lwp/lwp_pid.c

@@ -14,8 +14,12 @@
  *                             error
  * 2023-10-27     shell        Format codes of sys_exit(). Fix the data racing where lock is missed
  *                             Add reference on pid/tid, so the resource is not freed while using.
+ * 2024-01-25     shell        porting to new sched API
  */
 
+/* includes scheduler related API */
+#define __RT_IPC_SOURCE__
+
 #include <rthw.h>
 #include <rtthread.h>
 
@@ -59,7 +63,7 @@ int lwp_pid_init(void)
 
 void lwp_pid_lock_take(void)
 {
-    DEF_RETURN_CODE(rc);
+    LWP_DEF_RETURN_CODE(rc);
 
     rc = lwp_mutex_take_safe(&pid_mtx, RT_WAITING_FOREVER, 0);
     /* should never failed */
@@ -382,7 +386,7 @@ rt_lwp_t lwp_create(rt_base_t flags)
         }
     }
 
-    LOG_D("%s(pid=%d) => %p", __func__, new_lwp->pid, new_lwp);
+    LOG_D("%s(pid=%d) => %p", __func__, new_lwp ? new_lwp->pid : -1, new_lwp);
     return new_lwp;
 }
 
@@ -699,6 +703,7 @@ pid_t lwp_name2pid(const char *name)
     pid_t pid = 0;
     rt_thread_t main_thread;
     char* process_name = RT_NULL;
+    rt_sched_lock_level_t slvl;
 
     lwp_pid_lock_take();
     for (idx = 0; idx < RT_LWP_MAX_NR; idx++)
@@ -713,10 +718,12 @@ pid_t lwp_name2pid(const char *name)
             if (!rt_strncmp(name, process_name, RT_NAME_MAX))
             {
                 main_thread = rt_list_entry(lwp->t_grp.prev, struct rt_thread, sibling);
-                if (!(main_thread->stat & RT_THREAD_CLOSE))
+                rt_sched_lock(&slvl);
+                if (!(rt_sched_thread_get_stat(main_thread) == RT_THREAD_CLOSE))
                 {
                     pid = lwp->pid;
                 }
+                rt_sched_unlock(slvl);
             }
         }
     }
@@ -767,7 +774,7 @@ static sysret_t _lwp_wait_and_recycle(struct rt_lwp *child, rt_thread_t cur_thr,
             error = rt_thread_suspend_with_flag(cur_thr, RT_INTERRUPTIBLE);
             if (error == 0)
             {
-                rt_list_insert_before(&child->wait_list, &(cur_thr->tlist));
+                rt_list_insert_before(&child->wait_list, &RT_THREAD_LIST_NODE(cur_thr));
                 LWP_UNLOCK(child);
 
                 rt_set_errno(RT_EINTR);
@@ -898,15 +905,15 @@ static void print_thread_info(struct rt_thread* thread, int maxlen)
     rt_uint8_t stat;
 
 #ifdef RT_USING_SMP
-    if (thread->oncpu != RT_CPU_DETACHED)
+    if (RT_SCHED_CTX(thread).oncpu != RT_CPU_DETACHED)
-        rt_kprintf("%-*.*s %3d %3d ", maxlen, RT_NAME_MAX, thread->parent.name, thread->oncpu, thread->current_priority);
+        rt_kprintf("%-*.*s %3d %3d ", maxlen, RT_NAME_MAX, thread->parent.name, RT_SCHED_CTX(thread).oncpu, RT_SCHED_PRIV(thread).current_priority);
     else
-        rt_kprintf("%-*.*s N/A %3d ", maxlen, RT_NAME_MAX, thread->parent.name, thread->current_priority);
+        rt_kprintf("%-*.*s N/A %3d ", maxlen, RT_NAME_MAX, thread->parent.name, RT_SCHED_PRIV(thread).current_priority);
 #else
     rt_kprintf("%-*.*s %3d ", maxlen, RT_NAME_MAX, thread->parent.name, thread->current_priority);
 #endif /*RT_USING_SMP*/
 
-    stat = (thread->stat & RT_THREAD_STAT_MASK);
+    stat = (RT_SCHED_CTX(thread).stat & RT_THREAD_STAT_MASK);
     if (stat == RT_THREAD_READY)        rt_kprintf(" ready  ");
     else if ((stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK) rt_kprintf(" suspend");
     else if (stat == RT_THREAD_INIT)    rt_kprintf(" init   ");
@@ -932,7 +939,7 @@ static void print_thread_info(struct rt_thread* thread, int maxlen)
             thread->stack_size,
             (thread->stack_size + (rt_uint32_t)(rt_size_t)thread->stack_addr - (rt_uint32_t)(rt_size_t)ptr) * 100
             / thread->stack_size,
-            thread->remaining_tick,
+            RT_SCHED_PRIV(thread).remaining_tick,
             thread->error);
 #endif
 }
@@ -1066,99 +1073,15 @@ MSH_CMD_EXPORT_ALIAS(cmd_killall, killall, kill processes by name);
 int lwp_check_exit_request(void)
 {
     rt_thread_t thread = rt_thread_self();
+    rt_base_t expected = LWP_EXIT_REQUEST_TRIGGERED;
+
     if (!thread->lwp)
     {
         return 0;
     }
 
-    if (thread->exit_request == LWP_EXIT_REQUEST_TRIGGERED)
+    return rt_atomic_compare_exchange_strong(&thread->exit_request, &expected,
-    {
+                                             LWP_EXIT_REQUEST_IN_PROCESS);
-        thread->exit_request = LWP_EXIT_REQUEST_IN_PROCESS;
-        return 1;
-    }
-    return 0;
-}
-
-static int found_thread(struct rt_lwp* lwp, rt_thread_t thread)
-{
-    int found = 0;
-    rt_base_t level;
-    rt_list_t *list;
-
-    level = rt_spin_lock_irqsave(&thread->spinlock);
-    list = lwp->t_grp.next;
-    while (list != &lwp->t_grp)
-    {
-        rt_thread_t iter_thread;
-
-        iter_thread = rt_list_entry(list, struct rt_thread, sibling);
-        if (thread == iter_thread)
-        {
-            found = 1;
-            break;
-        }
-        list = list->next;
-    }
-    rt_spin_unlock_irqrestore(&thread->spinlock, level);
-    return found;
-}
-
-void lwp_request_thread_exit(rt_thread_t thread_to_exit)
-{
-    rt_thread_t main_thread;
-    rt_base_t level;
-    rt_list_t *list;
-    struct rt_lwp *lwp;
-
-    lwp = lwp_self();
-
-    if ((!thread_to_exit) || (!lwp))
-    {
-        return;
-    }
-
-    level = rt_spin_lock_irqsave(&thread_to_exit->spinlock);
-
-    main_thread = rt_list_entry(lwp->t_grp.prev, struct rt_thread, sibling);
-    if (thread_to_exit == main_thread)
-    {
-        goto finish;
-    }
-    if ((struct rt_lwp *)thread_to_exit->lwp != lwp)
-    {
-        goto finish;
-    }
-
-    for (list = lwp->t_grp.next; list != &lwp->t_grp; list = list->next)
-    {
-        rt_thread_t thread;
-
-        thread = rt_list_entry(list, struct rt_thread, sibling);
-        if (thread != thread_to_exit)
-        {
-            continue;
-        }
-        if (thread->exit_request == LWP_EXIT_REQUEST_NONE)
-        {
-            thread->exit_request = LWP_EXIT_REQUEST_TRIGGERED;
-        }
-        if ((thread->stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK)
-        {
-            thread->error = -RT_EINTR;
-            rt_hw_dsb();
-            rt_thread_wakeup(thread);
-        }
-        break;
-    }
-
-    while (found_thread(lwp, thread_to_exit))
-    {
-        rt_thread_mdelay(10);
-    }
-
-finish:
-    rt_spin_unlock_irqrestore(&thread_to_exit->spinlock, level);
-    return;
 }
 
 static void _wait_sibling_exit(rt_lwp_t lwp, rt_thread_t curr_thread);
@@ -1193,34 +1116,32 @@ void lwp_terminate(struct rt_lwp *lwp)
 
 static void _wait_sibling_exit(rt_lwp_t lwp, rt_thread_t curr_thread)
 {
-    rt_base_t level;
+    rt_sched_lock_level_t slvl;
     rt_list_t *list;
     rt_thread_t thread;
+    rt_base_t expected = LWP_EXIT_REQUEST_NONE;
 
     /* broadcast exit request for sibling threads */
     LWP_LOCK(lwp);
     for (list = lwp->t_grp.next; list != &lwp->t_grp; list = list->next)
     {
         thread = rt_list_entry(list, struct rt_thread, sibling);
-        level = rt_spin_lock_irqsave(&thread->spinlock);
-        if (thread->exit_request == LWP_EXIT_REQUEST_NONE)
-        {
-            thread->exit_request = LWP_EXIT_REQUEST_TRIGGERED;
-        }
-        rt_spin_unlock_irqrestore(&thread->spinlock, level);
 
-        level = rt_spin_lock_irqsave(&thread->spinlock);
+        rt_atomic_compare_exchange_strong(&thread->exit_request, &expected,
-        if ((thread->stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK)
+                                          LWP_EXIT_REQUEST_TRIGGERED);
+
+        rt_sched_lock(&slvl);
+        /* dont release, otherwise thread may have been freed */
+        if (rt_sched_thread_is_suspended(thread))
         {
             thread->error = RT_EINTR;
-            rt_spin_unlock_irqrestore(&thread->spinlock, level);
+            rt_sched_unlock(slvl);
 
-            rt_hw_dsb();
             rt_thread_wakeup(thread);
         }
         else
         {
-            rt_spin_unlock_irqrestore(&thread->spinlock, level);
+            rt_sched_unlock(slvl);
         }
     }
     LWP_UNLOCK(lwp);
@@ -1240,6 +1161,7 @@ static void _wait_sibling_exit(rt_lwp_t lwp, rt_thread_t curr_thread)
         subthread_is_terminated = (int)(curr_thread->sibling.prev == &lwp->t_grp);
         if (!subthread_is_terminated)
         {
+            rt_sched_lock_level_t slvl;
             rt_thread_t sub_thread;
             rt_list_t *list;
             int all_subthread_in_init = 1;
@@ -1247,13 +1169,18 @@ static void _wait_sibling_exit(rt_lwp_t lwp, rt_thread_t curr_thread)
             /* check all subthread is in init state */
             for (list = curr_thread->sibling.prev; list != &lwp->t_grp; list = list->prev)
             {
-
+                rt_sched_lock(&slvl);
                 sub_thread = rt_list_entry(list, struct rt_thread, sibling);
-                if ((sub_thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_INIT)
+                if (rt_sched_thread_get_stat(sub_thread) != RT_THREAD_INIT)
                 {
+                    rt_sched_unlock(slvl);
                     all_subthread_in_init = 0;
                     break;
                 }
+                else
+                {
+                    rt_sched_unlock(slvl);
+                }
             }
             if (all_subthread_in_init)
             {
@@ -1344,7 +1271,7 @@ static void _resr_cleanup(struct rt_lwp *lwp)
         LWP_UNLOCK(lwp);
         if (!rt_list_isempty(&lwp->wait_list))
         {
-            thread = rt_list_entry(lwp->wait_list.next, struct rt_thread, tlist);
+            thread = RT_THREAD_LIST_NODE_ENTRY(lwp->wait_list.next);
             thread->error = RT_EOK;
             thread->msg_ret = (void*)(rt_size_t)lwp->lwp_ret;
             rt_thread_resume(thread);

components/lwp/lwp_signal.c

@@ -11,7 +11,7 @@
  *                             remove lwp_signal_backup/restore() to reduce architecture codes
  *                             update the generation, pending and delivery routines
  */
-
+#define __RT_IPC_SOURCE__
 #define DBG_TAG "lwp.signal"
 #define DBG_LVL DBG_INFO
 #include <rtdbg.h>
@@ -408,6 +408,8 @@ rt_err_t lwp_signal_init(struct lwp_signal *sig)
 {
     rt_err_t rc = RT_EOK;
 
+    sig->real_timer = LWP_SIG_INVALID_TIMER;
+
     memset(&sig->sig_dispatch_thr, 0, sizeof(sig->sig_dispatch_thr));
 
     memset(&sig->sig_action, 0, sizeof(sig->sig_action));
@@ -423,6 +425,7 @@ rt_err_t lwp_signal_detach(struct lwp_signal *signal)
 {
     rt_err_t ret = RT_EOK;
 
+    timer_delete(signal->real_timer);
     lwp_sigqueue_clear(&signal->sig_queue);
 
     return ret;
@@ -561,28 +564,42 @@ void lwp_thread_signal_catch(void *exp_frame)
 static int _do_signal_wakeup(rt_thread_t thread, int sig)
 {
     int need_schedule;
+    rt_sched_lock_level_t slvl;
     if (!_sigismember(&thread->signal.sigset_mask, sig))
     {
-        if ((thread->stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK)
+        rt_sched_lock(&slvl);
+        int stat = rt_sched_thread_get_stat(thread);
+        if ((stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK)
         {
-            if ((thread->stat & RT_SIGNAL_COMMON_WAKEUP_MASK) != RT_SIGNAL_COMMON_WAKEUP_MASK)
+            if ((stat & RT_SIGNAL_COMMON_WAKEUP_MASK) != RT_SIGNAL_COMMON_WAKEUP_MASK)
             {
+                thread->error = RT_EINTR;
+                rt_sched_unlock(slvl);
+
                 rt_thread_wakeup(thread);
                 need_schedule = 1;
             }
-            else if ((sig == SIGKILL) && ((thread->stat & RT_SIGNAL_KILL_WAKEUP_MASK) != RT_SIGNAL_KILL_WAKEUP_MASK))
+            else if ((sig == SIGKILL || sig == SIGSTOP) &&
+                    ((stat & RT_SIGNAL_KILL_WAKEUP_MASK) != RT_SIGNAL_KILL_WAKEUP_MASK))
             {
+                thread->error = RT_EINTR;
+                rt_sched_unlock(slvl);
+
                 rt_thread_wakeup(thread);
                 need_schedule = 1;
             }
             else
             {
+                rt_sched_unlock(slvl);
                 need_schedule = 0;
             }
         }
         else
+        {
+            rt_sched_unlock(slvl);
             need_schedule = 0;
         }
+    }
     else
         need_schedule = 0;
 
@@ -838,7 +855,7 @@ rt_err_t lwp_thread_signal_kill(rt_thread_t thread, long signo, long code, long
 
     LOG_D("%s(signo=%d)", __func__, signo);
 
-    if (!thread || signo < 0 || signo >= _LWP_NSIG)
+    if (!thread || signo <= 0 || signo >= _LWP_NSIG)
     {
         ret = -RT_EINVAL;
     }

components/lwp/lwp_signal.h

@@ -17,6 +17,9 @@
 #include <rtthread.h>
 #include <sys/signal.h>
 
+struct timespec;
+struct itimerspec;
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -28,6 +31,7 @@ extern "C" {
 #define LWP_SIG_USER_SA_FLAGS                                               \
     (SA_NOCLDSTOP | SA_NOCLDWAIT | SA_SIGINFO | SA_ONSTACK | SA_RESTART |   \
      SA_NODEFER | SA_RESETHAND | SA_EXPOSE_TAGBITS)
+#define LWP_SIG_INVALID_TIMER ((timer_t)-1)
 
 typedef enum {
     LWP_SIG_MASK_CMD_BLOCK,
@@ -40,6 +44,7 @@ typedef enum {
  * LwP implementation of POSIX signal
  */
 struct lwp_signal {
+    timer_t real_timer;
     struct lwp_sigqueue sig_queue;
     rt_thread_t sig_dispatch_thr[_LWP_NSIG];
 
@@ -167,6 +172,10 @@ rt_err_t lwp_thread_signal_timedwait(rt_thread_t thread, lwp_sigset_t *sigset,
  */
 void lwp_thread_signal_pending(rt_thread_t thread, lwp_sigset_t *sigset);
 
+rt_err_t lwp_signal_setitimer(struct rt_lwp *lwp, int which,
+                              const struct itimerspec *restrict new,
+                              struct itimerspec *restrict old);
+
 #ifdef __cplusplus
 }
 #endif

components/lwp/lwp_syscall.c

@@ -14,7 +14,7 @@
  * 2023-07-06     Shell        adapt the signal API, and clone, fork to new implementation of lwp signal
  * 2023-07-27     Shell        Move tid_put() from lwp_free() to sys_exit()
  */
-
+#define __RT_IPC_SOURCE__
 #define _GNU_SOURCE
 
 /* RT-Thread System call */
@@ -1120,7 +1120,7 @@ sysret_t sys_getpriority(int which, id_t who)
         if (lwp)
         {
             rt_thread_t thread = rt_list_entry(lwp->t_grp.prev, struct rt_thread, sibling);
-            prio = thread->current_priority;
+            prio = RT_SCHED_PRIV(thread).current_priority;
         }
 
         lwp_pid_lock_release();
@@ -1808,7 +1808,7 @@ rt_thread_t sys_thread_create(void *arg[])
     }
 
 #ifdef RT_USING_SMP
-    thread->bind_cpu = lwp->bind_cpu;
+    RT_SCHED_CTX(thread).bind_cpu = lwp->bind_cpu;
 #endif
     thread->cleanup = lwp_cleanup;
     thread->user_entry = (void (*)(void *))arg[1];
@@ -1935,15 +1935,15 @@ long _sys_clone(void *arg[])
             RT_NULL,
             RT_NULL,
             self->stack_size,
-            self->init_priority,
+            RT_SCHED_PRIV(self).init_priority,
-            self->init_tick);
+            RT_SCHED_PRIV(self).init_tick);
     if (!thread)
     {
         goto fail;
     }
 
 #ifdef RT_USING_SMP
-    thread->bind_cpu = lwp->bind_cpu;
+    RT_SCHED_CTX(self).bind_cpu = lwp->bind_cpu;
 #endif
     thread->cleanup = lwp_cleanup;
     thread->user_entry = RT_NULL;
@@ -2120,8 +2120,8 @@ sysret_t _sys_fork(void)
             RT_NULL,
             RT_NULL,
             self_thread->stack_size,
-            self_thread->init_priority,
+            RT_SCHED_PRIV(self_thread).init_priority,
-            self_thread->init_tick);
+            RT_SCHED_PRIV(self_thread).init_tick);
     if (!thread)
     {
         SET_ERRNO(ENOMEM);
@@ -4231,6 +4231,9 @@ sysret_t sys_sigtimedwait(const sigset_t *sigset, siginfo_t *info, const struct
     struct timespec ktimeout;
     struct timespec *ptimeout;
 
+    /* for RT_ASSERT */
+    RT_UNUSED(ret);
+
     /* Fit sigset size to lwp set */
     if (sizeof(lwpset) < sigsize)
     {
@@ -5505,7 +5508,7 @@ sysret_t sys_sched_setaffinity(pid_t pid, size_t size, void *set)
 sysret_t sys_sched_getaffinity(const pid_t pid, size_t size, void *set)
 {
 #ifdef ARCH_MM_MMU
-    DEF_RETURN_CODE(rc);
+    LWP_DEF_RETURN_CODE(rc);
     void *mask;
     struct rt_lwp *lwp;
     rt_bool_t need_release = RT_FALSE;
@@ -5571,7 +5574,7 @@ sysret_t sys_sched_getaffinity(const pid_t pid, size_t size, void *set)
 
     kmem_put(mask);
 
-    RETURN(rc);
+    LWP_RETURN(rc);
 #else
     return -1;
 #endif
@@ -5679,13 +5682,11 @@ sysret_t sys_sched_yield(void)
     return 0;
 }
 
-sysret_t sys_sched_getparam(const pid_t pid, void *param)
+sysret_t sys_sched_getparam(const pid_t tid, void *param)
 {
     struct sched_param *sched_param = RT_NULL;
-    struct rt_lwp *lwp = NULL;
+    rt_thread_t thread;
-    rt_thread_t main_thread;
     int ret = -1;
-    rt_bool_t need_release = RT_FALSE;
 
     if (!lwp_user_accessable(param, sizeof(struct sched_param)))
     {
@@ -5698,27 +5699,16 @@ sysret_t sys_sched_getparam(const pid_t pid, void *param)
         return -ENOMEM;
     }
 
-    if (pid > 0)
+    thread = lwp_tid_get_thread_and_inc_ref(tid);
-    {
-        need_release = RT_TRUE;
-        lwp_pid_lock_take();
-        lwp = lwp_from_pid_locked(pid);
-    }
-    else if (pid == 0)
-    {
-        lwp = lwp_self();
-    }
 
-    if (lwp)
+    if (thread)
     {
-        main_thread = rt_list_entry(lwp->t_grp.prev, struct rt_thread, sibling);
+        sched_param->sched_priority = RT_SCHED_PRIV(thread).current_priority;
-        if (need_release)
-            lwp_pid_lock_release();
-
-        sched_param->sched_priority = main_thread->current_priority;
         ret = 0;
     }
 
+    lwp_tid_dec_ref(thread);
+
     lwp_put_to_user((void *)param, sched_param, sizeof(struct sched_param));
     kmem_put(sched_param);
 
@@ -5800,7 +5790,7 @@ sysret_t sys_sched_getscheduler(int tid, int *policy, void *param)
     }
 
     thread = lwp_tid_get_thread_and_inc_ref(tid);
-    sched_param->sched_priority = thread->current_priority;
+    sched_param->sched_priority = RT_SCHED_PRIV(thread).current_priority;
     lwp_tid_dec_ref(thread);
 
     lwp_put_to_user((void *)param, sched_param, sizeof(struct sched_param));
@@ -6814,20 +6804,24 @@ sysret_t sys_memfd_create()
 {
     return 0;
 }
+
 sysret_t sys_setitimer(int which, const struct itimerspec *restrict new, struct itimerspec *restrict old)
 {
-    int ret = 0;
+    sysret_t rc = 0;
-    timer_t timerid = 0;
+    rt_lwp_t lwp = lwp_self();
-    struct sigevent sevp_k = {0};
+    struct itimerspec new_value_k;
+    struct itimerspec old_value_k;
 
-    sevp_k.sigev_notify = SIGEV_SIGNAL;
+    if (lwp_get_from_user(&new_value_k, (void *)new, sizeof(*new)) != sizeof(*new))
-    sevp_k.sigev_signo = SIGALRM;
-    ret = timer_create(CLOCK_REALTIME_ALARM, &sevp_k, &timerid);
-    if (ret != 0)
     {
-        return GET_ERRNO();
+        return -EFAULT;
     }
-    return sys_timer_settime(timerid,0,new,old);
+
+    rc = lwp_signal_setitimer(lwp, which, &new_value_k, &old_value_k);
+    if (old && lwp_put_to_user(old, (void *)&old_value_k, sizeof old_value_k) != sizeof old_value_k)
+        return -EFAULT;
+
+    return rc;
 }
 
 const static struct rt_syscall_def func_table[] =

components/mm/mm_aspace.h

@@ -25,22 +25,12 @@
 #define MM_PA_TO_OFF(pa) ((uintptr_t)(pa) >> MM_PAGE_SHIFT)
 #define PV_OFFSET        (rt_kmem_pvoff())
 
-#ifndef RT_USING_SMP
+typedef struct rt_spinlock mm_spinlock_t;
-typedef rt_spinlock_t mm_spinlock;
-
-#define MM_PGTBL_LOCK_INIT(aspace)
-#define MM_PGTBL_LOCK(aspace)      (rt_hw_spin_lock(&((aspace)->pgtbl_lock)))
-#define MM_PGTBL_UNLOCK(aspace)    (rt_hw_spin_unlock(&((aspace)->pgtbl_lock)))
-
-#else
-typedef struct rt_spinlock mm_spinlock;
 
 #define MM_PGTBL_LOCK_INIT(aspace) (rt_spin_lock_init(&((aspace)->pgtbl_lock)))
 #define MM_PGTBL_LOCK(aspace)      (rt_spin_lock(&((aspace)->pgtbl_lock)))
 #define MM_PGTBL_UNLOCK(aspace)    (rt_spin_unlock(&((aspace)->pgtbl_lock)))
 
-#endif /* RT_USING_SMP */
-
 struct rt_aspace;
 struct rt_varea;
 struct rt_mem_obj;
@@ -53,7 +43,7 @@ typedef struct rt_aspace
     rt_size_t size;
 
     void *page_table;
-    mm_spinlock pgtbl_lock;
+    mm_spinlock_t pgtbl_lock;
 
     struct _aspace_tree tree;
     struct rt_mutex bst_lock;

components/utilities/libadt/uthash/SConscript

@@ -0,0 +1,9 @@
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c')
+CPPPATH = [cwd]
+group   = []
+
+group = DefineGroup('LIBADT', src, depend = [], CPPPATH = CPPPATH)
+Return('group')

components/utilities/libadt/uthash/dict.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-11-01     Shell        Init ver.
+ */
+
+#ifndef __LIBADT_DICT_H__
+#define __LIBADT_DICT_H__
+
+#include "rt_uthash.h"
+
+#endif

components/utilities/libadt/uthash/rt_uthash.h

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-11-01     Shell        Porting to RTT API
+ */
+#ifndef __LIBADT_RT_UTHASH_H__
+#define __LIBADT_RT_UTHASH_H__
+
+#include <rtthread.h>
+
+#define uthash_malloc(sz)    rt_malloc(sz)
+#define uthash_free(ptr, sz) rt_free(ptr)
+
+/**
+ * for performance consideration, using libc implementations
+ * as the default case. If you care about the compatibility
+ * problem, define the RT_UTHASH_CONFIG_COMPATIBILITY_FIRST
+ * before including the rt_uthash.h.
+ */
+#ifndef RT_UTHASH_CONFIG_COMPATIBILITY_FIRST
+#define uthash_bzero(a, n) memset(a, '\0', n)
+#define uthash_strlen(s)   strlen(s)
+
+#else
+#define uthash_bzero(a, n) rt_memset(a, '\0', n)
+#define uthash_strlen(s)   rt_strlen(s)
+
+#endif /* RT_UTHASH_CONFIG_COMPATIBILITY_FIRST */
+
+/* if any fatal happen, throw an exception and return a failure */
+#define uthash_fatal(msg)  \
+    do                     \
+    {                      \
+        LOG_E(msg);        \
+        return -RT_ENOMEM; \
+    } while (0)
+
+#include "uthash.h"
+
+#define DEFINE_RT_UTHASH_TYPE(entry_name, key_type, key_name) \
+    typedef struct entry_name                                 \
+    {                                                         \
+        key_type key_name;                                    \
+        UT_hash_handle hh;                                    \
+    } *entry_name##_t;
+
+#define RT_UTHASH_ADD(head, key_member, keylen_in, value) \
+    HASH_ADD(hh, head, key_member, keylen_in, value)
+#define RT_UTHASH_FIND(head, key_ptr, keylen_in, pval) \
+    HASH_FIND(hh, head, key_ptr, keylen_in, pval)
+#define RT_UTHASH_DELETE(head, pobj) HASH_DELETE(hh, head, pobj)
+
+#endif /* __LIBADT_RT_UTHASH_H__ */

components/vbus/prio_queue.c

@@ -89,7 +89,7 @@ void rt_prio_queue_detach(struct rt_prio_queue *que)
         rt_base_t level = rt_hw_interrupt_disable();
 
         /* get next suspend thread */
-        thread = rt_list_entry(que->suspended_pop_list.next, struct rt_thread, tlist);
+        thread = RT_THREAD_LIST_NODE_ENTRY(que->suspended_pop_list.next);
         /* set error code to -RT_ERROR */
         thread->error = -RT_ERROR;
 
@@ -160,9 +160,7 @@ rt_err_t rt_prio_queue_push(struct rt_prio_queue *que,
         rt_thread_t thread;
 
         /* get thread entry */
-        thread = rt_list_entry(que->suspended_pop_list.next,
+        thread = RT_THREAD_LIST_NODE_ENTRY(que->suspended_pop_list.next);
-                               struct rt_thread,
-                               tlist);
         /* resume it */
         rt_thread_resume(thread);
         rt_hw_interrupt_enable(level);
@@ -207,7 +205,7 @@ rt_err_t rt_prio_queue_pop(struct rt_prio_queue *que,
         thread->error = RT_EOK;
         rt_thread_suspend(thread);
 
-        rt_list_insert_before(&(que->suspended_pop_list), &(thread->tlist));
+        rt_list_insert_before(&(que->suspended_pop_list), &RT_THREAD_LIST_NODE(thread));
 
         if (timeout > 0)
         {

components/vbus/vbus.c

@@ -336,7 +336,7 @@ rt_err_t rt_vbus_post(rt_uint8_t id,
         rt_enter_critical();
         rt_thread_suspend(thread);
 
-        rt_list_insert_after(&_chn_suspended_threads[id], &thread->tlist);
+        rt_list_insert_after(&_chn_suspended_threads[id], &RT_THREAD_LIST_NODE(thread));
         if (timeout > 0)
         {
             rt_timer_control(&(thread->thread_timer),
@@ -443,9 +443,7 @@ static void rt_vbus_notify_chn(unsigned char chnr, rt_err_t err)
     {
         rt_thread_t thread;
 
-        thread = rt_list_entry(_chn_suspended_threads[chnr].next,
+        thread = RT_THREAD_LIST_NODE_ENTRY(_chn_suspended_threads[chnr].next);
-                               struct rt_thread,
-                               tlist);
         thread->error = err;
         rt_thread_resume(thread);
     }
@@ -855,9 +853,7 @@ static int _chn0_actor(unsigned char *dp, size_t dsize)
             {
                 rt_thread_t thread;
 
-                thread = rt_list_entry(_chn_suspended_threads[chnr].next,
+                thread = RT_THREAD_LIST_NODE_ENTRY(_chn_suspended_threads[chnr].next);
-                                       struct rt_thread,
-                                       tlist);
                 rt_thread_resume(thread);
             }
             rt_exit_critical();

components/vbus/watermark_queue.c

@@ -43,9 +43,7 @@ void rt_wm_que_dump(struct rt_watermark_queue *wg)
     {
         rt_thread_t thread;
 
-        thread = rt_list_entry(wg->suspended_threads.next,
+        thread = RT_THREAD_LIST_NODE_ENTRY(wg->suspended_threads.next);
-                               struct rt_thread,
-                               tlist);
         rt_kprintf(" %.*s", RT_NAME_MAX, thread->parent.name);
     }
     rt_kprintf("\n");

components/vbus/watermark_queue.h

@@ -64,7 +64,7 @@ rt_inline rt_err_t rt_wm_que_inc(struct rt_watermark_queue *wg,
         thread = rt_thread_self();
         thread->error = RT_EOK;
         rt_thread_suspend(thread);
-        rt_list_insert_after(&wg->suspended_threads, &thread->tlist);
+        rt_list_insert_after(&wg->suspended_threads, &RT_THREAD_LIST_NODE(thread));
         if (timeout > 0)
         {
             rt_timer_control(&(thread->thread_timer),
@@ -116,9 +116,7 @@ rt_inline void rt_wm_que_dec(struct rt_watermark_queue *wg)
         {
             rt_thread_t thread;
 
-            thread = rt_list_entry(wg->suspended_threads.next,
+            thread = RT_THREAD_LIST_NODE_ENTRY(wg->suspended_threads.next);
-                                   struct rt_thread,
-                                   tlist);
             rt_thread_resume(thread);
             need_sched = 1;
         }

examples/utest/testcases/kernel/Kconfig

@@ -69,4 +69,8 @@ config UTEST_MTSAFE_KPRINT_TC
     bool "mtsafe kprint test"
     default n
 
+config UTEST_SCHEDULER_TC
+    bool "scheduler test"
+    default n
+
 endmenu

examples/utest/testcases/kernel/SConscript

@@ -50,6 +50,13 @@ if GetDepend(['UTEST_HOOKLIST_TC']):
 if GetDepend(['UTEST_MTSAFE_KPRINT_TC']):
     src += ['mtsafe_kprint_tc.c']
 
+# Stressful testcase for scheduler (MP/UP)
+if GetDepend(['UTEST_SCHEDULER_TC']):
+    src += ['sched_timed_sem_tc.c']
+    src += ['sched_timed_mtx_tc.c']
+    src += ['sched_mtx_tc.c']
+    src += ['sched_sem_tc.c', 'sched_thread_tc.c']
+
 group = DefineGroup('utestcases', src, depend = ['RT_USING_UTESTCASES'], CPPPATH = CPPPATH)
 
 Return('group')

examples/utest/testcases/kernel/mutex_tc.c

@@ -8,15 +8,16 @@
  * 2021-09.01     luckyzjq     the first version
  * 2023-09-15     xqyjlj       change stack size in cpu64
  */
+#define __RT_IPC_SOURCE__
 
 #include <rtthread.h>
 #include <stdlib.h>
 #include "utest.h"
 
 #ifdef ARCH_CPU_64BIT
-#define THREAD_STACKSIZE 4096
+#define THREAD_STACKSIZE 8192
 #else
-#define THREAD_STACKSIZE 1024
+#define THREAD_STACKSIZE 4096
 #endif
 
 static struct rt_mutex static_mutex;
@@ -241,7 +242,7 @@ static void static_thread1_entry(void *param)
 
     /*  thread3 hode mutex  thread2 take mutex */
     /* check thread2 and thread3 priority */
-    if (tid2->current_priority != tid3->current_priority)
+    if (RT_SCHED_PRIV(tid2).current_priority != RT_SCHED_PRIV(tid3).current_priority)
     {
         uassert_true(RT_FALSE);
     }
@@ -550,7 +551,7 @@ static void dynamic_thread1_entry(void *param)
 
     /*  thread3 hode mutex  thread2 take mutex */
     /* check thread2 and thread3 priority */
-    if (tid2->current_priority != tid3->current_priority)
+    if (RT_SCHED_PRIV(tid2).current_priority != RT_SCHED_PRIV(tid3).current_priority)
     {
         uassert_true(RT_FALSE);
     }

examples/utest/testcases/kernel/sched_mtx_tc.c

@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-01-17     Shell        the first version
+ */
+#include <rtthread.h>
+#include <stdlib.h>
+#include "utest.h"
+
+/**
+ * Stressful Test for Mutex
+ */
+
+#define TEST_SECONDS 30
+#define TEST_LOOP_TICKS (TEST_SECONDS * RT_TICK_PER_SECOND)
+#define TEST_THREAD_COUNTS (RT_CPUS_NR)
+#define TEST_PROGRESS_COUNTS (36)
+#define TEST_PROGRESS_ON (TEST_LOOP_TICKS/TEST_PROGRESS_COUNTS)
+#define TEST_PRIORITY_HIGHEST (UTEST_THR_PRIORITY+1)
+#define TEST_RANDOM_LATENCY_MAX (1000 * 1000)
+
+static struct rt_semaphore _thr_exit_sem;
+static rt_atomic_t _progress_counter;
+static rt_atomic_t _exit_flag;
+static struct rt_mutex _racing_lock;
+
+static void test_thread_entry(void *param)
+{
+    while (1)
+    {
+        rt_mutex_take(&_racing_lock, RT_WAITING_FOREVER);
+        rt_mutex_release(&_racing_lock);
+
+        if (rt_atomic_load(&_exit_flag))
+        {
+            break;
+        }
+    }
+
+    rt_sem_release(&_thr_exit_sem);
+}
+
+static void mutex_stress_tc(void)
+{
+    rt_err_t error;
+    rt_thread_t tester;
+    const rt_base_t priority_base = TEST_PRIORITY_HIGHEST;
+
+    for (size_t i = 0; i < TEST_THREAD_COUNTS; i++)
+    {
+        tester = rt_thread_create(
+            "tester",
+            test_thread_entry,
+            (void *)0,
+            UTEST_THR_STACK_SIZE,
+            priority_base + (i % (RT_THREAD_PRIORITY_MAX - TEST_PRIORITY_HIGHEST)),
+            1);
+
+        rt_thread_startup(tester);
+    }
+
+    for (size_t i = 0; i < TEST_LOOP_TICKS; i++)
+    {
+        rt_thread_delay(1);
+
+        if (rt_atomic_add(&_progress_counter, 1) % TEST_PROGRESS_ON == 0)
+            uassert_true(1);
+    }
+
+    /* trigger exit request for all sub-threads */
+    rt_atomic_store(&_exit_flag, 1);
+
+    /* waiting for sub-threads to exit */
+    for (size_t i = 0; i < TEST_THREAD_COUNTS; i++)
+    {
+        error = rt_sem_take(&_thr_exit_sem, RT_WAITING_FOREVER);
+        uassert_int_equal(error, RT_EOK);
+    }
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    int *pseed = rt_malloc(sizeof(int));
+    srand(*(int *)pseed);
+    rt_free(pseed);
+
+    rt_sem_init(&_thr_exit_sem, "test", 0, RT_IPC_FLAG_PRIO);
+    rt_mutex_init(&_racing_lock, "ipc", RT_IPC_FLAG_PRIO);
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    rt_sem_detach(&_thr_exit_sem);
+    rt_mutex_detach(&_racing_lock);
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(mutex_stress_tc);
+}
+UTEST_TC_EXPORT(testcase, "testcases.kernel.scheduler.mutex", utest_tc_init, utest_tc_cleanup, TEST_SECONDS);

examples/utest/testcases/kernel/sched_sem_tc.c

@@ -0,0 +1,196 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-01-17     Shell        the first version
+ */
+#define __RT_IPC_SOURCE__
+
+#include <rtthread.h>
+#include "rthw.h"
+#include "utest.h"
+
+#define KERN_TEST_CONFIG_LOOP_TIMES     160
+#define KERN_TEST_CONCURRENT_THREADS    (RT_CPUS_NR * 2)
+#define KERN_TEST_CONFIG_HIGHEST_PRIO   3
+#define KERN_TEST_CONFIG_LOWEST_PRIO    (RT_THREAD_PRIORITY_MAX - 2)
+
+#define TEST_LEVEL_COUNTS (KERN_TEST_CONFIG_LOWEST_PRIO - KERN_TEST_CONFIG_HIGHEST_PRIO + 1)
+#if TEST_LEVEL_COUNTS <= RT_CPUS_NR
+#warning for the best of this test, TEST_LEVEL_COUNTS should greater than RT_CPUS_NR
+#endif
+#if KERN_TEST_CONCURRENT_THREADS < RT_CPUS_NR
+#warning for the best of this test, KERN_TEST_CONCURRENT_THREADS should greater than RT_CPUS_NR
+#endif
+#if KERN_TEST_CONFIG_LOWEST_PRIO >= RT_THREAD_PRIORITY_MAX - 1
+#error the thread priority should at least be greater than idle
+#endif
+
+static rt_atomic_t _star_counter = 1;
+static struct rt_semaphore _thr_exit_sem;
+static struct rt_semaphore _level_waiting[TEST_LEVEL_COUNTS];
+static rt_thread_t _thread_matrix[TEST_LEVEL_COUNTS][KERN_TEST_CONCURRENT_THREADS];
+static rt_atomic_t _load_average[RT_CPUS_NR];
+
+static void _print_char(rt_thread_t thr_self, int character)
+{
+    rt_base_t current_counter;
+
+#ifdef RT_USING_SMP
+    rt_kprintf("%c%d", character, RT_SCHED_CTX(thr_self).oncpu);
+#else
+    rt_kprintf("%c0", character);
+#endif /* RT_USING_SMP */
+
+    current_counter = rt_atomic_add(&_star_counter, 1);
+    if (current_counter % 30 == 0)
+    {
+        rt_kprintf("\n");
+    }
+}
+
+static void _stats_load_avg_inc(void)
+{
+    int cpuid;
+
+    cpuid = rt_hw_cpu_id();
+    rt_atomic_add(&_load_average[cpuid], 1);
+}
+
+static void _stats_load_avg_print(void)
+{
+    rt_base_t counts = 0;
+    const rt_base_t total_test_counts = KERN_TEST_CONFIG_LOOP_TIMES * TEST_LEVEL_COUNTS * KERN_TEST_CONCURRENT_THREADS;
+
+    for (size_t i = 0; i < RT_CPUS_NR; i++)
+    {
+        rt_kprintf("%ld ", _load_average[i]);
+        counts += _load_average[i];
+    }
+
+    rt_kprintf("\n");
+    uassert_int_equal(counts, total_test_counts);
+}
+
+static void _thread_entry(void *param)
+{
+    int level = (rt_ubase_t)param;
+    rt_thread_t thr_self = rt_thread_self();
+
+    if (level == 0)
+    {
+        /* always the first to execute among other working threads */
+        for (size_t i = 0; i < KERN_TEST_CONFIG_LOOP_TIMES; i++)
+        {
+            /* notify our consumer */
+            rt_sem_release(&_level_waiting[level + 1]);
+
+            _stats_load_avg_inc();
+
+            /* waiting for resource of ours */
+            rt_sem_take(&_level_waiting[level], RT_WAITING_FOREVER);
+        }
+    }
+    else if (level == TEST_LEVEL_COUNTS - 1)
+    {
+
+        for (size_t i = 0; i < KERN_TEST_CONFIG_LOOP_TIMES; i++)
+        {
+            /* waiting for our resource first */
+            rt_sem_take(&_level_waiting[level], RT_WAITING_FOREVER);
+
+            _stats_load_avg_inc();
+
+            _print_char(thr_self, '*');
+
+            rt_thread_delay(1);
+
+            /* produce for level 0 worker */
+            rt_sem_release(&_level_waiting[0]);
+        }
+    }
+    else
+    {
+        for (size_t i = 0; i < KERN_TEST_CONFIG_LOOP_TIMES; i++)
+        {
+            /* waiting for resource of ours */
+            rt_sem_take(&_level_waiting[level], RT_WAITING_FOREVER);
+
+            _stats_load_avg_inc();
+
+            /* notify our consumer */
+            rt_sem_release(&_level_waiting[level + 1]);
+        }
+    }
+
+    uassert_true(1);
+    rt_sem_release(&_thr_exit_sem);
+
+    return;
+}
+
+static void scheduler_tc(void)
+{
+    LOG_I("Test starts...");
+    for (size_t i = 0; i < TEST_LEVEL_COUNTS; i++)
+    {
+        for (size_t j = 0; j < KERN_TEST_CONCURRENT_THREADS; j++)
+        {
+            rt_thread_startup(_thread_matrix[i][j]);
+        }
+    }
+    LOG_I("%d threads startup...", TEST_LEVEL_COUNTS * KERN_TEST_CONCURRENT_THREADS);
+
+    /* waiting for sub-threads to exit */
+    for (size_t i = 0; i < TEST_LEVEL_COUNTS * KERN_TEST_CONCURRENT_THREADS; i++)
+    {
+        rt_sem_take(&_thr_exit_sem, RT_WAITING_FOREVER);
+    }
+
+    /* print load average */
+    _stats_load_avg_print();
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    LOG_I("Setup environment...");
+    rt_sem_init(&_thr_exit_sem, "test", 0, RT_IPC_FLAG_PRIO);
+
+    for (size_t i = 0; i < TEST_LEVEL_COUNTS; i++)
+    {
+        rt_sem_init(&_level_waiting[i], "test", 0, RT_IPC_FLAG_PRIO);
+
+        for (size_t j = 0; j < KERN_TEST_CONCURRENT_THREADS; j++)
+        {
+            _thread_matrix[i][j] =
+                rt_thread_create("test",
+                                 _thread_entry,
+                                 (void *)i,
+                                 UTEST_THR_STACK_SIZE,
+                                 KERN_TEST_CONFIG_HIGHEST_PRIO+i,
+                                 5);
+            if (!_thread_matrix[i][j])
+                uassert_not_null(_thread_matrix[i][j]);
+        }
+    }
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    rt_sem_detach(&_thr_exit_sem);
+    for (size_t i = 0; i < TEST_LEVEL_COUNTS; i++)
+    {
+        rt_sem_detach(&_level_waiting[i]);
+    }
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(scheduler_tc);
+}
+UTEST_TC_EXPORT(testcase, "testcases.kernel.scheduler.sem", utest_tc_init, utest_tc_cleanup, 10);

examples/utest/testcases/kernel/sched_thread_tc.c

@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-01-25     Shell        init ver.
+ */
+#define __RT_KERNEL_SOURCE__
+#include <rtthread.h>
+#include "utest.h"
+
+#define TEST_LOOP_TIMES (100 * 1000)
+#define TEST_PROGRESS_COUNTS (36)
+#define TEST_THREAD_COUNT (RT_CPUS_NR * 1)
+#define TEST_PROGRESS_ON (TEST_LOOP_TIMES*TEST_THREAD_COUNT/TEST_PROGRESS_COUNTS)
+
+static struct rt_semaphore _thr_exit_sem;
+static rt_atomic_t _progress_counter;
+
+static volatile rt_thread_t threads_group[TEST_THREAD_COUNT][2];
+
+static void _thread_entry1(void *param)
+{
+    rt_base_t critical_level;
+    size_t idx = (size_t)param;
+
+    for (size_t i = 0; i < TEST_LOOP_TIMES; i++)
+    {
+        critical_level = rt_enter_critical();
+
+        rt_thread_suspend(rt_thread_self());
+        rt_thread_resume(threads_group[idx][1]);
+
+        rt_exit_critical_safe(critical_level);
+
+        if (rt_atomic_add(&_progress_counter, 1) % TEST_PROGRESS_ON == 0)
+            uassert_true(1);
+    }
+
+    rt_sem_release(&_thr_exit_sem);
+    return;
+}
+
+static void _thread_entry2(void *param)
+{
+    rt_base_t critical_level;
+    size_t idx = (size_t)param;
+
+    for (size_t i = 0; i < TEST_LOOP_TIMES; i++)
+    {
+        critical_level = rt_enter_critical();
+
+        rt_thread_suspend(rt_thread_self());
+        rt_thread_resume(threads_group[idx][0]);
+
+        rt_exit_critical_safe(critical_level);
+
+        if (rt_atomic_add(&_progress_counter, 1) % TEST_PROGRESS_ON == 0)
+            uassert_true(1);
+    }
+
+    rt_sem_release(&_thr_exit_sem);
+    return;
+}
+
+static void scheduler_tc(void)
+{
+    for (size_t i = 0; i < TEST_THREAD_COUNT; i++)
+    {
+        rt_thread_t t1 =
+            rt_thread_create(
+                "t1",
+                _thread_entry1,
+                (void *)i,
+                UTEST_THR_STACK_SIZE,
+                UTEST_THR_PRIORITY + 1,
+                100);
+        rt_thread_t t2 =
+            rt_thread_create(
+                "t2",
+                _thread_entry2,
+                (void *)i,
+                UTEST_THR_STACK_SIZE,
+                UTEST_THR_PRIORITY + 1,
+                100);
+
+        threads_group[i][0] = t1;
+        threads_group[i][1] = t2;
+    }
+
+    for (size_t i = 0; i < TEST_THREAD_COUNT; i++)
+    {
+        rt_thread_startup(threads_group[i][0]);
+        rt_thread_startup(threads_group[i][1]);
+    }
+
+    for (size_t i = 0; i < TEST_THREAD_COUNT; i++)
+    {
+        rt_sem_take(&_thr_exit_sem, RT_WAITING_FOREVER);
+    }
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    rt_sem_init(&_thr_exit_sem, "test", 0, RT_IPC_FLAG_PRIO);
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    rt_sem_detach(&_thr_exit_sem);
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(scheduler_tc);
+}
+UTEST_TC_EXPORT(testcase, "testcases.kernel.scheduler.thread", utest_tc_init, utest_tc_cleanup, 10);

examples/utest/testcases/kernel/sched_timed_mtx_tc.c

@@ -0,0 +1,232 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-01-25     Shell        init ver.
+ */
+#define __RT_KERNEL_SOURCE__
+#include <rtthread.h>
+#include <stdlib.h>
+#include "utest.h"
+
+#define TEST_SECONDS 10
+#define TEST_LOOP_TICKS (TEST_SECONDS * RT_TICK_PER_SECOND)
+#define TEST_PROGRESS_COUNTS (36)
+#define TEST_PROGRESS_ON (TEST_LOOP_TICKS*2/TEST_PROGRESS_COUNTS)
+
+static struct rt_semaphore _thr_exit_sem;
+static struct rt_mutex _ipc_primitive;
+static struct rt_semaphore _cons_can_take_mtx;
+static struct rt_semaphore _prod_can_take_mtx;
+static rt_atomic_t _progress_counter;
+#define CONSUMER_MAGIC 0x11223344
+#define PRODUCER_MAGIC 0x44332211
+static rt_atomic_t _last_holder_flag = CONSUMER_MAGIC;
+static rt_base_t _timedout_failed_times = 0;
+
+/**
+ * Test on timedout IPC with racing condition where timedout routine and producer
+ * thread may race to wakeup sleeper.
+ *
+ * This test will fork 2 thread, one producer and one consumer. The producer will
+ * looping and trigger the IPC on the edge of new tick arrives. The consumer will
+ * wait on IPC with a timedout of 1 tick.
+ */
+
+static void _wait_until_edge(void)
+{
+    rt_tick_t entry_level, current;
+    rt_base_t random_latency;
+
+    entry_level = rt_tick_get();
+    do
+    {
+        current = rt_tick_get();
+    }
+    while (current == entry_level);
+
+    /* give a random latency for test */
+    random_latency = rand() % 1000 * 1000;
+    entry_level = current;
+    for (size_t i = 0; i < random_latency; i++)
+    {
+        current = rt_tick_get();
+        if (current != entry_level)
+            break;
+    }
+}
+
+static void _producer_entry(void *param)
+{
+    rt_err_t error;
+    for (size_t i = 0; i < TEST_LOOP_TICKS; i++)
+    {
+        /**
+         * only try to take mutex after consumer have taken it after last
+         * release from us.
+         */
+        error = rt_sem_take(&_prod_can_take_mtx, RT_WAITING_FOREVER);
+        if (error)
+        {
+            uassert_true(0);
+            break;
+        }
+
+        error = rt_mutex_take(&_ipc_primitive, RT_WAITING_FOREVER);
+        if (error)
+        {
+            uassert_true(0);
+            break;
+        }
+
+        /* ensure that mutex should be held in round-robin method */
+        if (rt_atomic_load(&_last_holder_flag) != CONSUMER_MAGIC)
+        {
+            uassert_true(0);
+            break;
+        }
+        else
+        {
+            rt_atomic_store(&_last_holder_flag, PRODUCER_MAGIC);
+            rt_sem_release(&_cons_can_take_mtx);
+        }
+
+        _wait_until_edge();
+
+        rt_mutex_release(&_ipc_primitive);
+
+        if (rt_atomic_add(&_progress_counter, 1) % TEST_PROGRESS_ON == 0)
+            uassert_true(1);
+    }
+
+    rt_sem_release(&_thr_exit_sem);
+    return;
+}
+
+static void _consumer_entry(void *param)
+{
+    rt_err_t error;
+    for (size_t i = 0; i < TEST_LOOP_TICKS; i++)
+    {
+        /**
+         * only try to take mutex after producer have taken it after last
+         * release from us.
+         */
+        error = rt_sem_take(&_cons_can_take_mtx, RT_WAITING_FOREVER);
+        if (error)
+        {
+            uassert_true(0);
+            break;
+        }
+
+        while (1)
+        {
+            error = rt_mutex_take_interruptible(&_ipc_primitive, 1);
+            if (error == -RT_ETIMEOUT)
+            {
+                _timedout_failed_times++;
+                if (rt_mutex_get_owner(&_ipc_primitive) == rt_thread_self())
+                {
+                    uassert_true(0);
+                    break;
+                }
+            }
+            else
+            {
+                break;
+            }
+        }
+
+        if (error != RT_EOK)
+        {
+            uassert_true(0);
+            break;
+        }
+
+        /* ensure that mutex should be held in round-robin method */
+        if (rt_atomic_load(&_last_holder_flag) != PRODUCER_MAGIC)
+        {
+            uassert_true(0);
+            break;
+        }
+        else
+        {
+            rt_atomic_store(&_last_holder_flag, CONSUMER_MAGIC);
+            rt_sem_release(&_prod_can_take_mtx);
+        }
+
+        rt_mutex_release(&_ipc_primitive);
+        if (rt_mutex_get_owner(&_ipc_primitive) == rt_thread_self())
+        {
+            uassert_true(0);
+            break;
+        }
+
+        if (rt_atomic_add(&_progress_counter, 1) % TEST_PROGRESS_ON == 0)
+            uassert_true(1);
+    }
+
+    rt_sem_release(&_thr_exit_sem);
+    return;
+}
+
+static void timed_mtx_tc(void)
+{
+    rt_thread_t prod = rt_thread_create(
+        "prod",
+        _producer_entry,
+        (void *)0,
+        UTEST_THR_STACK_SIZE,
+        UTEST_THR_PRIORITY + 1,
+        4);
+
+    rt_thread_t cons = rt_thread_create(
+        "cons",
+        _consumer_entry,
+        (void *)0,
+        UTEST_THR_STACK_SIZE,
+        UTEST_THR_PRIORITY + 1,
+        100);
+
+    rt_thread_startup(prod);
+    rt_thread_startup(cons);
+
+    for (size_t i = 0; i < 2; i++)
+    {
+        uassert_int_equal(
+            rt_sem_take(&_thr_exit_sem, 2 * TEST_LOOP_TICKS),
+            RT_EOK);
+    }
+
+    /* Summary */
+    LOG_I("Total failed times: %ld(in %d)\n", _timedout_failed_times, TEST_LOOP_TICKS);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    _timedout_failed_times = 0;
+
+    rt_mutex_init(&_ipc_primitive, "ipc", RT_IPC_FLAG_PRIO);
+    rt_sem_init(&_cons_can_take_mtx, "test", 0, RT_IPC_FLAG_PRIO);
+    rt_sem_init(&_prod_can_take_mtx, "test", 1, RT_IPC_FLAG_PRIO);
+    rt_sem_init(&_thr_exit_sem, "test", 0, RT_IPC_FLAG_PRIO);
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    rt_mutex_detach(&_ipc_primitive);
+    rt_sem_detach(&_cons_can_take_mtx);
+    rt_sem_detach(&_prod_can_take_mtx);
+    rt_sem_detach(&_thr_exit_sem);
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(timed_mtx_tc);
+}
+UTEST_TC_EXPORT(testcase, "testcases.kernel.scheduler.timed_mtx", utest_tc_init, utest_tc_cleanup, TEST_SECONDS * 2);

examples/utest/testcases/kernel/sched_timed_sem_tc.c

@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-01-25     Shell        init ver.
+ */
+#define __RT_KERNEL_SOURCE__
+#include <rtthread.h>
+#include <stdlib.h>
+#include "utest.h"
+
+#define TEST_SECONDS 10
+#define TEST_LOOP_TICKS (TEST_SECONDS * RT_TICK_PER_SECOND)
+#define TEST_PROGRESS_COUNTS (36)
+#define TEST_PROGRESS_ON (TEST_LOOP_TICKS*2/TEST_PROGRESS_COUNTS)
+
+static struct rt_semaphore _thr_exit_sem;
+static struct rt_semaphore _ipc_sem;
+static rt_atomic_t _progress_counter;
+static rt_base_t _timedout_failed_times = 0;
+
+/**
+ * Test on timedout IPC with racing condition where timedout routine and producer
+ * thread may race to wakeup sleeper.
+ *
+ * This test will fork 2 thread, one producer and one consumer. The producer will
+ * looping and trigger the IPC on the edge of new tick arrives. The consumer will
+ * wait on IPC with a timedout of 1 tick.
+ */
+
+static void _wait_until_edge(void)
+{
+    rt_tick_t entry_level, current;
+    rt_base_t random_latency;
+
+    entry_level = rt_tick_get();
+    do
+    {
+        current = rt_tick_get();
+    }
+    while (current == entry_level);
+
+    /* give a random latency for test */
+    random_latency = rand();
+    entry_level = current;
+    for (size_t i = 0; i < random_latency; i++)
+    {
+        current = rt_tick_get();
+        if (current != entry_level)
+            break;
+    }
+}
+
+static void _producer_entry(void *param)
+{
+    for (size_t i = 0; i < TEST_LOOP_TICKS; i++)
+    {
+        _wait_until_edge();
+
+        rt_sem_release(&_ipc_sem);
+
+        if (rt_atomic_add(&_progress_counter, 1) % TEST_PROGRESS_ON == 0)
+            uassert_true(1);
+    }
+
+    rt_sem_release(&_thr_exit_sem);
+    return;
+}
+
+static void _consumer_entry(void *param)
+{
+    int error;
+    for (size_t i = 0; i < TEST_LOOP_TICKS; i++)
+    {
+        error = rt_sem_take_interruptible(&_ipc_sem, 1);
+        if (error == -RT_ETIMEOUT)
+        {
+            _timedout_failed_times++;
+        }
+        else
+        {
+            if (error != RT_EOK)
+                uassert_true(0);
+        }
+
+        if (rt_atomic_add(&_progress_counter, 1) % TEST_PROGRESS_ON == 0)
+            uassert_true(1);
+    }
+
+    rt_sem_release(&_thr_exit_sem);
+    return;
+}
+
+static void timed_sem_tc(void)
+{
+    rt_thread_t prod = rt_thread_create(
+        "prod",
+        _producer_entry,
+        (void *)0,
+        UTEST_THR_STACK_SIZE,
+        UTEST_THR_PRIORITY + 1,
+        4);
+
+    rt_thread_t cons = rt_thread_create(
+        "cons",
+        _consumer_entry,
+        (void *)0,
+        UTEST_THR_STACK_SIZE,
+        UTEST_THR_PRIORITY + 1,
+        100);
+
+    rt_thread_startup(prod);
+    rt_thread_startup(cons);
+
+    for (size_t i = 0; i < 2; i++)
+    {
+        rt_sem_take(&_thr_exit_sem, RT_WAITING_FOREVER);
+    }
+
+    /* Summary */
+    LOG_I("Total failed times: %ld(in %d)\n", _timedout_failed_times, TEST_LOOP_TICKS);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    int *pseed = rt_malloc(sizeof(int));
+    srand(*(int *)pseed);
+    rt_free(pseed);
+
+    rt_sem_init(&_ipc_sem, "ipc", 0, RT_IPC_FLAG_PRIO);
+    rt_sem_init(&_thr_exit_sem, "test", 0, RT_IPC_FLAG_PRIO);
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    rt_sem_detach(&_ipc_sem);
+    rt_sem_detach(&_thr_exit_sem);
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(timed_sem_tc);
+}
+UTEST_TC_EXPORT(testcase, "testcases.kernel.scheduler.timed_sem", utest_tc_init, utest_tc_cleanup, TEST_SECONDS * 2);

examples/utest/testcases/kernel/signal_tc.c

@@ -22,7 +22,8 @@
 #include <rtthread.h>
 #include "utest.h"
 
-int recive_sig = 0;
+static volatile int recive_sig = 0;
+static struct rt_semaphore _received_signal;
 
 void sig_handle_default(int signo)
 {
@@ -125,12 +126,15 @@ void rt_signal_wait_thread(void *parm)
     (void)sigaddset(&selectset, SIGUSR1);
 
     /* case 5:rt_signal_wait, two thread, thread1: install and unmask, then wait 1s; thread2: kill, should received. */
-    if (rt_signal_wait(&selectset, &recive_si, RT_TICK_PER_SECOND) != RT_EOK)
+    if (rt_signal_wait((void *)&selectset, &recive_si, RT_TICK_PER_SECOND) != RT_EOK)
     {
         return;
     }
 
     recive_sig = recive_si.si_signo;
+
+    LOG_I("received signal %d", recive_sig);
+    rt_sem_release(&_received_signal);
 }
 
 static void rt_signal_wait_test(void)
@@ -147,7 +151,7 @@ static void rt_signal_wait_test(void)
     rt_thread_mdelay(1);
     /* case 5:rt_signal_wait, two thread, thread1: install and unmask, then wait 1s; thread2: kill, should received. */
     uassert_int_equal(rt_thread_kill(t1, SIGUSR1), RT_EOK);
-    rt_thread_mdelay(1);
+    rt_sem_take(&_received_signal, RT_WAITING_FOREVER);
     uassert_int_equal(recive_sig, SIGUSR1);
 
     return;
@@ -167,7 +171,9 @@ static void rt_signal_wait_test2(void)
     /* case 6:rt_signal_wait, two thread, thread1: install and unmask, then wait 1s; thread2: sleep 2s then kill, should can't received. */
     rt_thread_mdelay(2000);
     uassert_int_equal(rt_thread_kill(t1, SIGUSR1), RT_EOK);
-    rt_thread_mdelay(1);
+    uassert_int_not_equal(
+        rt_sem_take(&_received_signal, 1),
+        RT_EOK);
     uassert_int_not_equal(recive_sig, SIGUSR1);
 
     return;
@@ -175,11 +181,13 @@ static void rt_signal_wait_test2(void)
 
 static rt_err_t utest_tc_init(void)
 {
+    rt_sem_init(&_received_signal, "utest", 0, RT_IPC_FLAG_PRIO);
     return RT_EOK;
 }
 
 static rt_err_t utest_tc_cleanup(void)
 {
+    rt_sem_detach(&_received_signal);
     return RT_EOK;
 }
 

examples/utest/testcases/kernel/thread_tc.c

@@ -9,6 +9,8 @@
  * 2021-10.11     mazhiyuan    add idle, yield, suspend, control, priority, delay_until
  */
 
+#define __RT_IPC_SOURCE__ /* include internal API for utest */
+
 #include <rtthread.h>
 #include <stdlib.h>
 #include "utest.h"
@@ -56,7 +58,7 @@ static void test_dynamic_thread(void)
                             thread1_entry,
                             (void *)1,
                             THREAD_STACK_SIZE,
-                            __current_thread->current_priority + 1,
+                            UTEST_THR_PRIORITY + 1,
                             THREAD_TIMESLICE - 5);
     if (tid1 == RT_NULL)
     {
@@ -105,7 +107,7 @@ static void test_static_thread(void)
                               (void *)2,
                               &thread2_stack[0],
                               sizeof(thread2_stack),
-                              __current_thread->current_priority + 1,
+                              UTEST_THR_PRIORITY + 1,
                               THREAD_TIMESLICE);
     if (ret_init != RT_EOK)
     {
@@ -139,10 +141,11 @@ __exit:
 
 static void thread3_entry(void *parameter)
 {
-    rt_tick_t tick;
+    rt_tick_t tick, latency_tick;
     tick = rt_tick_get();
     rt_thread_delay(15);
-    if (rt_tick_get() - tick > 16)
+    latency_tick = rt_tick_get() - tick;
+    if (latency_tick > 16 || latency_tick < 15)
     {
         tid3_finish_flag = 1;
         tid3_delay_pass_flag = 0;
@@ -160,7 +163,7 @@ static void test_thread_delay(void)
                             thread3_entry,
                             RT_NULL,
                             THREAD_STACK_SIZE,
-                            __current_thread->current_priority - 1,
+                            UTEST_THR_PRIORITY - 1,
                             THREAD_TIMESLICE);
     if (tid3 == RT_NULL)
     {
@@ -210,7 +213,7 @@ static void test_idle_hook(void)
                             thread4_entry,
                             RT_NULL,
                             THREAD_STACK_SIZE,
-                            __current_thread->current_priority - 1,
+                            UTEST_THR_PRIORITY - 1,
                             THREAD_TIMESLICE);
     if (tid4 == RT_NULL)
     {
@@ -264,7 +267,7 @@ static void test_thread_yield(void)
                             thread5_entry,
                             RT_NULL,
                             THREAD_STACK_SIZE,
-                            __current_thread->current_priority - 1,
+                            UTEST_THR_PRIORITY - 1,
                             THREAD_TIMESLICE);
     if (tid5 == RT_NULL)
     {
@@ -283,7 +286,7 @@ static void test_thread_yield(void)
                             thread6_entry,
                             RT_NULL,
                             THREAD_STACK_SIZE,
-                            __current_thread->current_priority - 1,
+                            UTEST_THR_PRIORITY - 1,
                             THREAD_TIMESLICE);
     if (tid6 == RT_NULL)
     {
@@ -319,12 +322,13 @@ static void test_thread_control(void)
 {
     rt_err_t ret_control = -RT_ERROR;
     rt_err_t rst_delete = -RT_ERROR;
+    rt_sched_lock_level_t slvl;
 
     tid7 = rt_thread_create("thread7",
                             thread7_entry,
                             RT_NULL,
                             THREAD_STACK_SIZE,
-                            __current_thread->current_priority + 1,
+                            UTEST_THR_PRIORITY + 1,
                             THREAD_TIMESLICE);
     if (tid7 == RT_NULL)
     {
@@ -342,12 +346,17 @@ static void test_thread_control(void)
     }
     rt_thread_mdelay(200);
     rt_thread_control(tid7, RT_THREAD_CTRL_CHANGE_PRIORITY, &change_priority);
-    if (tid7->current_priority != change_priority)
+
+    rt_sched_lock(&slvl);
+    if (rt_sched_thread_get_curr_prio(tid7) != change_priority)
     {
         LOG_E("rt_thread_control failed!");
         uassert_false(1);
+        rt_sched_unlock(slvl);
         goto __exit;
     }
+    rt_sched_unlock(slvl);
+
     rst_delete = rt_thread_control(tid7, RT_THREAD_CTRL_CLOSE, RT_NULL);
     if (rst_delete != RT_EOK)
     {
@@ -380,7 +389,7 @@ static void test_thread_priority(void)
                             thread8_entry,
                             RT_NULL,
                             THREAD_STACK_SIZE,
-                            __current_thread->current_priority - 1,
+                            UTEST_THR_PRIORITY - 1,
                             THREAD_TIMESLICE);
     if (tid8 == RT_NULL)
     {
@@ -448,6 +457,10 @@ static void test_delay_until(void)
     rt_kprintf("delta[20] -> %d\n", delta);
     uassert_int_equal(delta, 20);
 
+    /**
+     * the rt_kprints above can take few ticks to complete, maybe more than 10
+     */
+    tick = rt_tick_get();
     check_tick = tick;
     rt_thread_delay(2);
     rt_thread_delay_until(&tick, 10);
@@ -495,7 +508,7 @@ void test_timeslice(void)
     timeslice_cntB2 = 0;
 
     tidA = rt_thread_create("timeslice", test_timeslice_threadA_entry, RT_NULL,
-                           2048, __current_thread->current_priority + 1, 10);
+                           2048, UTEST_THR_PRIORITY + 1, 10);
     if (!tidA)
     {
         LOG_E("rt_thread_create failed!");
@@ -512,7 +525,7 @@ void test_timeslice(void)
     }
 
     tidB1 = rt_thread_create("timeslice", test_timeslice_threadB1_entry, RT_NULL,
-                           2048, __current_thread->current_priority + 2, 2);
+                           2048, UTEST_THR_PRIORITY + 2, 2);
     if (!tidB1)
     {
         LOG_E("rt_thread_create failed!");
@@ -529,7 +542,7 @@ void test_timeslice(void)
     }
 
     tidB2 = rt_thread_create("timeslice", test_timeslice_threadB2_entry, RT_NULL,
-                           2048, __current_thread->current_priority + 2, 2);
+                           2048, UTEST_THR_PRIORITY + 2, 2);
     if (!tidB2)
     {
         LOG_E("rt_thread_create failed!");
@@ -655,7 +668,7 @@ void test_thread_yield_nosmp(void)
 //                            thread9_entry,
 //                            RT_NULL,
 //                            THREAD_STACK_SIZE,
-//                            __current_thread->current_priority + 1,
+//                            UTEST_THR_PRIORITY + 1,
 //                            THREAD_TIMESLICE);
 //     if (tid == RT_NULL)
 //     {
@@ -695,7 +708,7 @@ void test_thread_yield_nosmp(void)
 static rt_err_t utest_tc_init(void)
 {
     __current_thread = rt_thread_self();
-    change_priority = __current_thread->current_priority + 5;
+    change_priority = UTEST_THR_PRIORITY + 5;
     tid3_delay_pass_flag = 0;
     tid3_finish_flag = 0;
     tid4_finish_flag = 0;

include/rtcompiler.h

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-01-18     Shell        Separate the compiler porting from rtdef.h
+ */
+#ifndef __RT_COMPILER_H__
+#define __RT_COMPILER_H__
+
+#include <rtconfig.h>
+
+#if defined(__ARMCC_VERSION)        /* ARM Compiler */
+#define rt_section(x)               __attribute__((section(x)))
+#define rt_used                     __attribute__((used))
+#define rt_align(n)                 __attribute__((aligned(n)))
+#define rt_weak                     __attribute__((weak))
+#define rt_typeof                   typeof
+#define rt_noreturn
+#define rt_inline                   static __inline
+#define rt_always_inline            rt_inline
+#elif defined (__IAR_SYSTEMS_ICC__) /* for IAR Compiler */
+#define rt_section(x)               @ x
+#define rt_used                     __root
+#define PRAGMA(x)                   _Pragma(#x)
+#define rt_align(n)                 PRAGMA(data_alignment=n)
+#define rt_weak                     __weak
+#define rt_typeof                   typeof
+#define rt_noreturn
+#define rt_inline                   static inline
+#define rt_always_inline            rt_inline
+#elif defined (__GNUC__)            /* GNU GCC Compiler */
+#define __RT_STRINGIFY(x...)        #x
+#define RT_STRINGIFY(x...)          __RT_STRINGIFY(x)
+#define rt_section(x)               __attribute__((section(x)))
+#define rt_used                     __attribute__((used))
+#define rt_align(n)                 __attribute__((aligned(n)))
+#define rt_weak                     __attribute__((weak))
+#define rt_typeof                   __typeof__
+#define rt_noreturn                 __attribute__ ((noreturn))
+#define rt_inline                   static __inline
+#define rt_always_inline            static inline __attribute__((always_inline))
+#elif defined (__ADSPBLACKFIN__)    /* for VisualDSP++ Compiler */
+#define rt_section(x)               __attribute__((section(x)))
+#define rt_used                     __attribute__((used))
+#define rt_align(n)                 __attribute__((aligned(n)))
+#define rt_weak                     __attribute__((weak))
+#define rt_typeof                   typeof
+#define rt_noreturn
+#define rt_inline                   static inline
+#define rt_always_inline            rt_inline
+#elif defined (_MSC_VER)            /* for Visual Studio Compiler */
+#define rt_section(x)
+#define rt_used
+#define rt_align(n)                 __declspec(align(n))
+#define rt_weak
+#define rt_typeof                   typeof
+#define rt_noreturn
+#define rt_inline                   static __inline
+#define rt_always_inline            rt_inline
+#elif defined (__TI_COMPILER_VERSION__) /* for TI CCS Compiler */
+/**
+ * The way that TI compiler set section is different from other(at least
+ * GCC and MDK) compilers. See ARM Optimizing C/C++ Compiler 5.9.3 for more
+ * details.
+ */
+#define rt_section(x)               __attribute__((section(x)))
+#ifdef __TI_EABI__
+#define rt_used                     __attribute__((retain)) __attribute__((used))
+#else
+#define rt_used                     __attribute__((used))
+#endif
+#define PRAGMA(x)                   _Pragma(#x)
+#define rt_align(n)                 __attribute__((aligned(n)))
+#ifdef __TI_EABI__
+#define rt_weak                     __attribute__((weak))
+#else
+#define rt_weak
+#endif
+#define rt_typeof                   typeof
+#define rt_noreturn
+#define rt_inline                   static inline
+#define rt_always_inline            rt_inline
+#elif defined (__TASKING__)         /* for TASKING Compiler */
+#define rt_section(x)               __attribute__((section(x)))
+#define rt_used                     __attribute__((used, protect))
+#define PRAGMA(x)                   _Pragma(#x)
+#define rt_align(n)                 __attribute__((__align(n)))
+#define rt_weak                     __attribute__((weak))
+#define rt_typeof                   typeof
+#define rt_noreturn
+#define rt_inline                   static inline
+#define rt_always_inline            rt_inline
+#else                              /* Unkown Compiler */
+    #error not supported tool chain
+#endif /* __ARMCC_VERSION */
+
+#endif /* __RT_COMPILER_H__ */

include/rtdef.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2022, RT-Thread Development Team
+ * Copyright (c) 2006-2024, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -55,6 +55,8 @@
  * 2023-11-21     Meco Man     add RT_USING_NANO macro
  * 2023-12-18     xqyjlj       add rt_always_inline
  * 2023-12-22     Shell        Support hook list
+ * 2024-01-18     Shell        Seperate basical types to a rttypes.h
+ *                             Seperate the compiler portings to rtcompiler.h
  */
 
 #ifndef __RT_DEF_H__
@@ -96,71 +98,7 @@ extern "C" {
 
 
 /* RT-Thread basic data type definitions */
-typedef int                             rt_bool_t;      /**< boolean type */
+#include "rttypes.h"
-typedef signed long                     rt_base_t;      /**< Nbit CPU related date type */
-typedef unsigned long                   rt_ubase_t;     /**< Nbit unsigned CPU related data type */
-
-#ifndef RT_USING_ARCH_DATA_TYPE
-#ifdef RT_USING_LIBC
-typedef int8_t                          rt_int8_t;      /**<  8bit integer type */
-typedef int16_t                         rt_int16_t;     /**< 16bit integer type */
-typedef int32_t                         rt_int32_t;     /**< 32bit integer type */
-typedef uint8_t                         rt_uint8_t;     /**<  8bit unsigned integer type */
-typedef uint16_t                        rt_uint16_t;    /**< 16bit unsigned integer type */
-typedef uint32_t                        rt_uint32_t;    /**< 32bit unsigned integer type */
-typedef int64_t                         rt_int64_t;     /**< 64bit integer type */
-typedef uint64_t                        rt_uint64_t;    /**< 64bit unsigned integer type */
-#else
-typedef signed   char                   rt_int8_t;      /**<  8bit integer type */
-typedef signed   short                  rt_int16_t;     /**< 16bit integer type */
-typedef signed   int                    rt_int32_t;     /**< 32bit integer type */
-typedef unsigned char                   rt_uint8_t;     /**<  8bit unsigned integer type */
-typedef unsigned short                  rt_uint16_t;    /**< 16bit unsigned integer type */
-typedef unsigned int                    rt_uint32_t;    /**< 32bit unsigned integer type */
-#ifdef ARCH_CPU_64BIT
-typedef signed long                     rt_int64_t;     /**< 64bit integer type */
-typedef unsigned long                   rt_uint64_t;    /**< 64bit unsigned integer type */
-#else
-typedef signed long long                rt_int64_t;     /**< 64bit integer type */
-typedef unsigned long long              rt_uint64_t;    /**< 64bit unsigned integer type */
-#endif /* ARCH_CPU_64BIT */
-#endif /* RT_USING_LIBC */
-#endif /* RT_USING_ARCH_DATA_TYPE */
-
-#if defined(RT_USING_LIBC) && !defined(RT_USING_NANO)
-typedef size_t                          rt_size_t;      /**< Type for size number */
-typedef ssize_t                         rt_ssize_t;     /**< Used for a count of bytes or an error indication */
-#else
-typedef rt_ubase_t                      rt_size_t;      /**< Type for size number */
-typedef rt_base_t                       rt_ssize_t;     /**< Used for a count of bytes or an error indication */
-#endif /* defined(RT_USING_LIBC) && !defined(RT_USING_NANO) */
-
-typedef rt_base_t                       rt_err_t;       /**< Type for error number */
-typedef rt_uint32_t                     rt_time_t;      /**< Type for time stamp */
-typedef rt_uint32_t                     rt_tick_t;      /**< Type for tick count */
-typedef rt_base_t                       rt_flag_t;      /**< Type for flags */
-typedef rt_ubase_t                      rt_dev_t;       /**< Type for device */
-typedef rt_base_t                       rt_off_t;       /**< Type for offset */
-
-#ifdef __cplusplus
-    typedef rt_base_t rt_atomic_t;
-#else
-#if defined(RT_USING_HW_ATOMIC)
-    typedef rt_base_t rt_atomic_t;
-#elif defined(RT_USING_STDC_ATOMIC)
-    #include <stdatomic.h>
-    typedef atomic_size_t rt_atomic_t;
-#else
-    typedef rt_base_t rt_atomic_t;
-#endif /* RT_USING_STDC_ATOMIC */
-#endif /* __cplusplus */
-
-/* boolean type definitions */
-#define RT_TRUE                         1               /**< boolean true  */
-#define RT_FALSE                        0               /**< boolean fails */
-
-/* null pointer definition */
-#define RT_NULL                         0
 
 /**@}*/
 
@@ -194,90 +132,7 @@ typedef rt_base_t                       rt_off_t;       /**< Type for offset */
 #define RT_STATIC_ASSERT(name, expn) typedef char _static_assert_##name[(expn)?1:-1]
 
 /* Compiler Related Definitions */
-#if defined(__ARMCC_VERSION)        /* ARM Compiler */
+#include "rtcompiler.h"
-#define rt_section(x)               __attribute__((section(x)))
-#define rt_used                     __attribute__((used))
-#define rt_align(n)                 __attribute__((aligned(n)))
-#define rt_weak                     __attribute__((weak))
-#define rt_typeof                   typeof
-#define rt_noreturn
-#define rt_inline                   static __inline
-#define rt_always_inline            rt_inline
-#elif defined (__IAR_SYSTEMS_ICC__) /* for IAR Compiler */
-#define rt_section(x)               @ x
-#define rt_used                     __root
-#define PRAGMA(x)                   _Pragma(#x)
-#define rt_align(n)                 PRAGMA(data_alignment=n)
-#define rt_weak                     __weak
-#define rt_typeof                   typeof
-#define rt_noreturn
-#define rt_inline                   static inline
-#define rt_always_inline            rt_inline
-#elif defined (__GNUC__)            /* GNU GCC Compiler */
-#define __RT_STRINGIFY(x...)        #x
-#define RT_STRINGIFY(x...)          __RT_STRINGIFY(x)
-#define rt_section(x)               __attribute__((section(x)))
-#define rt_used                     __attribute__((used))
-#define rt_align(n)                 __attribute__((aligned(n)))
-#define rt_weak                     __attribute__((weak))
-#define rt_typeof                   __typeof__
-#define rt_noreturn                 __attribute__ ((noreturn))
-#define rt_inline                   static __inline
-#define rt_always_inline            static inline __attribute__((always_inline))
-#elif defined (__ADSPBLACKFIN__)    /* for VisualDSP++ Compiler */
-#define rt_section(x)               __attribute__((section(x)))
-#define rt_used                     __attribute__((used))
-#define rt_align(n)                 __attribute__((aligned(n)))
-#define rt_weak                     __attribute__((weak))
-#define rt_typeof                   typeof
-#define rt_noreturn
-#define rt_inline                   static inline
-#define rt_always_inline            rt_inline
-#elif defined (_MSC_VER)            /* for Visual Studio Compiler */
-#define rt_section(x)
-#define rt_used
-#define rt_align(n)                 __declspec(align(n))
-#define rt_weak
-#define rt_typeof                   typeof
-#define rt_noreturn
-#define rt_inline                   static __inline
-#define rt_always_inline            rt_inline
-#elif defined (__TI_COMPILER_VERSION__) /* for TI CCS Compiler */
-/**
- * The way that TI compiler set section is different from other(at least
- * GCC and MDK) compilers. See ARM Optimizing C/C++ Compiler 5.9.3 for more
- * details.
- */
-#define rt_section(x)               __attribute__((section(x)))
-#ifdef __TI_EABI__
-#define rt_used                     __attribute__((retain)) __attribute__((used))
-#else
-#define rt_used                     __attribute__((used))
-#endif
-#define PRAGMA(x)                   _Pragma(#x)
-#define rt_align(n)                 __attribute__((aligned(n)))
-#ifdef __TI_EABI__
-#define rt_weak                     __attribute__((weak))
-#else
-#define rt_weak
-#endif
-#define rt_typeof                   typeof
-#define rt_noreturn
-#define rt_inline                   static inline
-#define rt_always_inline            rt_inline
-#elif defined (__TASKING__)         /* for TASKING Compiler */
-#define rt_section(x)               __attribute__((section(x)))
-#define rt_used                     __attribute__((used, protect))
-#define PRAGMA(x)                   _Pragma(#x)
-#define rt_align(n)                 __attribute__((__align(n)))
-#define rt_weak                     __attribute__((weak))
-#define rt_typeof                   typeof
-#define rt_noreturn
-#define rt_inline                   static inline
-#define rt_always_inline            rt_inline
-#else                              /* Unkown Compiler */
-    #error not supported tool chain
-#endif /* __ARMCC_VERSION */
 
 /* initialization export */
 #ifdef RT_USING_COMPONENTS_INIT
@@ -417,6 +272,8 @@ typedef int (*init_fn_t)(void);
 #define RT_EPERM                        EPERM           /**< Operation not permitted */
 #define RT_EFAULT                       EFAULT          /**< Bad address */
 #define RT_ENOBUFS                      ENOBUFS         /**< No buffer space is available */
+#define RT_ESCHEDISR                    253             /**< scheduler failure in isr context */
+#define RT_ESCHEDLOCKED                 252             /**< scheduler failure in critical region */
 #define RT_ETRAP                        254             /**< Trap event */
 #else
 #define RT_EOK                          0               /**< There is no error */
@@ -436,6 +293,8 @@ typedef int (*init_fn_t)(void);
 #define RT_ETRAP                        14              /**< Trap event */
 #define RT_EFAULT                       15              /**< Bad address */
 #define RT_ENOBUFS                      16              /**< No buffer space is available */
+#define RT_ESCHEDISR                    17              /**< scheduler failure in isr context */
+#define RT_ESCHEDLOCKED                 18              /**< scheduler failure in critical region */
 #endif /* defined(RT_USING_LIBC) && !defined(RT_USING_NANO) */
 
 /**@}*/
@@ -469,53 +328,6 @@ typedef int (*init_fn_t)(void);
  */
 #define RT_ALIGN_DOWN(size, align)      ((size) & ~((align) - 1))
 
-/**
- * Double List structure
- */
-struct rt_list_node
-{
-    struct rt_list_node *next;                          /**< point to next node. */
-    struct rt_list_node *prev;                          /**< point to prev node. */
-};
-typedef struct rt_list_node rt_list_t;                  /**< Type for lists. */
-
-/**
- * Single List structure
- */
-struct rt_slist_node
-{
-    struct rt_slist_node *next;                         /**< point to next node. */
-};
-typedef struct rt_slist_node rt_slist_t;                /**< Type for single list. */
-
-#ifdef RT_USING_SMP
-#include <cpuport.h> /* for spinlock from arch */
-
-struct rt_spinlock
-{
-    rt_hw_spinlock_t lock;
-#if defined(RT_DEBUGING_SPINLOCK)
-    void *owner;
-    void *pc;
-#endif /* RT_DEBUGING_SPINLOCK */
-};
-typedef struct rt_spinlock rt_spinlock_t;
-
-#ifndef RT_SPINLOCK_INIT
-#define RT_SPINLOCK_INIT {{0}} // default
-#endif /* RT_SPINLOCK_INIT */
-
-#else
-typedef rt_ubase_t rt_spinlock_t;
-struct rt_spinlock
-{
-    rt_spinlock_t lock;
-};
-#define RT_SPINLOCK_INIT {0}
-#endif /* RT_USING_SMP */
-
-#define RT_DEFINE_SPINLOCK(x)  struct rt_spinlock x = RT_SPINLOCK_INIT
-
 /**
  * @addtogroup KernelObject
  */
@@ -770,6 +582,8 @@ struct rt_object_information
 
 #define RT_TIMER_FLAG_HARD_TIMER        0x0             /**< hard timer,the timer's callback function will be called in tick isr. */
 #define RT_TIMER_FLAG_SOFT_TIMER        0x4             /**< soft timer,the timer's callback function will be called in timer thread. */
+#define RT_TIMER_FLAG_THREAD_TIMER \
+    (0x8 | RT_TIMER_FLAG_HARD_TIMER)                    /**< thread timer that cooperates with scheduler directly */
 
 #define RT_TIMER_CTRL_SET_TIME          0x0             /**< set timer control command */
 #define RT_TIMER_CTRL_GET_TIME          0x1             /**< get timer control command */
@@ -791,6 +605,11 @@ struct rt_object_information
 #define RT_TIMER_SKIP_LIST_MASK         0x3             /**< Timer skips the list mask */
 #endif
 
+/**
+ * timeout handler of rt_timer
+ */
+typedef void (*rt_timer_func_t)(void *parameter);
+
 /**
  * timer structure
  */
@@ -800,7 +619,7 @@ struct rt_timer
 
     rt_list_t        row[RT_TIMER_SKIP_LIST_LEVEL];
 
-    void (*timeout_func)(void *parameter);              /**< timeout function */
+    rt_timer_func_t  timeout_func;                      /**< timeout function */
     void             *parameter;                        /**< timeout function's parameter */
 
     rt_tick_t        init_tick;                         /**< timer timeout tick */
@@ -901,16 +720,25 @@ struct rt_cpu_usage_stats
 };
 typedef struct rt_cpu_usage_stats *rt_cpu_usage_stats_t;
 
+#define _SCHEDULER_CONTEXT(fileds) fileds
+
 /**
  * CPUs definitions
  *
  */
 struct rt_cpu
 {
+    /**
+     * protected by:
+     *   - other cores: accessing from other coress is undefined behaviour
+     *   - local core: rt_enter_critical()/rt_exit_critical()
+     */
+    _SCHEDULER_CONTEXT(
         struct rt_thread        *current_thread;
-    struct rt_thread            *idle_thread;
+
-    rt_atomic_t                 irq_nest;
+        rt_uint8_t              irq_switch_flag:1;
-    rt_uint8_t                  irq_switch_flag;
+        rt_uint8_t              critical_switch_flag:1;
+        rt_uint8_t              sched_lock_flag:1;
 
         rt_uint8_t              current_priority;
         rt_list_t               priority_table[RT_THREAD_PRIORITY_MAX];
@@ -921,10 +749,14 @@ struct rt_cpu
         rt_uint32_t             priority_group;
     #endif /* RT_THREAD_PRIORITY_MAX > 32 */
 
-    rt_atomic_t                 tick;
+        rt_atomic_t             tick;   /**< Passing tickes on this core */
+    );
+
+    struct rt_thread            *idle_thread;
+    rt_atomic_t                 irq_nest;
 
-    struct rt_spinlock          spinlock;
 #ifdef RT_USING_SMART
+    struct rt_spinlock          spinlock;
     struct rt_cpu_usage_stats   cpu_stat;
 #endif
 };
@@ -1013,11 +845,12 @@ typedef void (*rt_thread_cleanup_t)(struct rt_thread *tid);
 /**
  * Thread structure
  */
+
+#include "rtsched.h" /* for struct rt_sched_thread_ctx */
+
 struct rt_thread
 {
     struct rt_object            parent;
-    rt_list_t                   tlist;                  /**< the thread list */
-    rt_list_t                   tlist_schedule;         /**< the thread list */
 
     /* stack point and entry */
     void                        *sp;                    /**< stack point */
@@ -1029,24 +862,13 @@ struct rt_thread
     /* error code */
     rt_err_t                    error;                  /**< error code */
 
-    rt_uint8_t                  stat;                   /**< thread status */
-
 #ifdef RT_USING_SMP
-    rt_uint8_t                  bind_cpu;               /**< thread is bind to cpu */
-    rt_uint8_t                  oncpu;                  /**< process on cpu */
-
     rt_atomic_t                 cpus_lock_nest;         /**< cpus lock count */
-    rt_atomic_t                 critical_lock_nest;     /**< critical lock count */
+#endif
-#endif /*RT_USING_SMP*/
 
-    /* priority */
+    RT_SCHED_THREAD_CTX;
-    rt_uint8_t                  current_priority;       /**< current priority */
+    struct rt_timer             thread_timer;           /**< built-in thread timer */
-    rt_uint8_t                  init_priority;          /**< initialized priority */
+    rt_thread_cleanup_t         cleanup;                /**< cleanup function when thread exit */
-#if RT_THREAD_PRIORITY_MAX > 32
-    rt_uint8_t                  number;
-    rt_uint8_t                  high_mask;
-#endif /* RT_THREAD_PRIORITY_MAX > 32 */
-    rt_uint32_t                 number_mask;            /**< priority number mask */
 
 #ifdef RT_USING_MUTEX
     /* object for IPC */
@@ -1071,9 +893,6 @@ struct rt_thread
     void                        *si_list;               /**< the signal infor list */
 #endif /* RT_USING_SIGNALS */
 
-    rt_atomic_t                 init_tick;              /**< thread's initialized tick */
-    rt_atomic_t                 remaining_tick;         /**< remaining tick */
-
 #ifdef RT_USING_CPU_USAGE
     rt_uint64_t                 duration_tick;          /**< cpu usage tick */
 #endif /* RT_USING_CPU_USAGE */
@@ -1082,10 +901,6 @@ struct rt_thread
     void                        *pthread_data;          /**< the handle of pthread data, adapt 32/64bit */
 #endif /* RT_USING_PTHREADS */
 
-    struct rt_timer             thread_timer;           /**< built-in thread timer */
-
-    rt_thread_cleanup_t         cleanup;                /**< cleanup function when thread exit */
-
     /* light weight process if present */
 #ifdef RT_USING_SMART
     void                        *msg_ret;               /**< the return msg */
@@ -1100,11 +915,12 @@ struct rt_thread
 
     struct lwp_thread_signal    signal;                 /**< lwp signal for user-space thread */
     struct rt_user_context      user_ctx;               /**< user space context */
-    struct rt_wakeup            wakeup;                 /**< wakeup data */
+    struct rt_wakeup            wakeup_handle;          /**< wakeup handle for IPC */
-    int                         exit_request;           /**< pending exit request of thread */
+    rt_atomic_t                 exit_request;           /**< pending exit request of thread */
     int                         tid;                    /**< thread ID used by process */
     int                         tid_ref_count;          /**< reference of tid */
     void                        *susp_recycler;         /**< suspended recycler on this thread */
+    void                        *robust_list;           /**< pi lock, very carefully, it's a userspace list!*/
 
     rt_uint64_t                 user_time;
     rt_uint64_t                 system_time;

include/rtsched.h

@@ -0,0 +1,172 @@
+/*
+ * Copyright (c) 2023-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-01-19     Shell        Seperate schduling statements from rt_thread_t
+ *                             to rt_sched_thread_ctx. Add definitions of scheduler.
+ */
+#ifndef __RT_SCHED_H__
+#define __RT_SCHED_H__
+
+#include "rttypes.h"
+#include "rtcompiler.h"
+
+struct rt_thread;
+
+typedef rt_uint8_t rt_sched_thread_status_t;
+
+#ifdef RT_USING_SCHED_THREAD_CTX
+
+/**
+ * Scheduler private status binding on thread. Caller should never accessing
+ * these members.
+ */
+struct rt_sched_thread_priv
+{
+    rt_tick_t                   init_tick;              /**< thread's initialized tick */
+    rt_tick_t                   remaining_tick;         /**< remaining tick */
+
+    /* priority */
+    rt_uint8_t                  current_priority;       /**< current priority */
+    rt_uint8_t                  init_priority;          /**< initialized priority */
+#if RT_THREAD_PRIORITY_MAX > 32
+    rt_uint8_t                  number;                 /**< priority low number */
+    rt_uint8_t                  high_mask;              /**< priority high mask */
+#endif /* RT_THREAD_PRIORITY_MAX > 32 */
+    rt_uint32_t                 number_mask;            /**< priority number mask */
+
+};
+
+/**
+ * Scheduler public status binding on thread. Caller must hold the scheduler
+ * lock before access any one of its member.
+ */
+struct rt_sched_thread_ctx
+{
+    rt_list_t                   thread_list_node;       /**< node in thread list */
+
+    rt_uint8_t                  stat;                   /**< thread status */
+    rt_uint8_t                  sched_flag_locked:1;    /**< calling thread have the scheduler locked */
+    rt_uint8_t                  sched_flag_ttmr_set:1;  /**< thread timer is start */
+
+#ifdef RT_USING_SMP
+    rt_uint8_t                  bind_cpu;               /**< thread is bind to cpu */
+    rt_uint8_t                  oncpu;                  /**< process on cpu */
+
+    rt_base_t                   critical_lock_nest;     /**< critical lock count */
+#endif
+
+    struct rt_sched_thread_priv sched_thread_priv;      /**< private context of scheduler */
+};
+
+#define RT_SCHED_THREAD_CTX struct rt_sched_thread_ctx sched_thread_ctx
+
+#define RT_SCHED_PRIV(thread) ((thread)->sched_thread_ctx.sched_thread_priv)
+#define RT_SCHED_CTX(thread) ((thread)->sched_thread_ctx)
+
+/**
+ * Convert a list node in container RT_SCHED_CTX(thread)->thread_list_node
+ * to a thread pointer.
+ */
+#define RT_THREAD_LIST_NODE_ENTRY(node)                                      \
+    rt_container_of(                                                         \
+        rt_list_entry((node), struct rt_sched_thread_ctx, thread_list_node), \
+        struct rt_thread, sched_thread_ctx)
+#define RT_THREAD_LIST_NODE(thread) (RT_SCHED_CTX(thread).thread_list_node)
+
+#else /* !defined(RT_USING_SCHED_THREAD_CTX) */
+
+#if RT_THREAD_PRIORITY_MAX > 32
+#define _RT_SCHED_THREAD_CTX_PRIO_EXT                 \
+    rt_uint8_t number;    /**< priority low number */ \
+    rt_uint8_t high_mask; /**< priority high mask */
+
+#else /* ! RT_THREAD_PRIORITY_MAX > 32 */
+
+#define _RT_SCHED_THREAD_CTX_PRIO_EXT
+#endif /* RT_THREAD_PRIORITY_MAX > 32 */
+
+#define RT_SCHED_THREAD_CTX                                                    \
+    rt_list_t tlist;                    /**< node in thread list */            \
+    rt_uint8_t stat;                    /**< thread status */                  \
+    rt_uint8_t sched_flag_locked:1;                                            \
+            /**< calling thread have the scheduler locked */                   \
+    rt_uint8_t sched_flag_ttmr_set:1;   /**< thread timer is start */          \
+    rt_tick_t init_tick;                /**< thread's initialized tick */      \
+    rt_tick_t remaining_tick;           /**< remaining tick */                 \
+    rt_uint8_t current_priority;        /**< current priority */               \
+    rt_uint8_t init_priority;           /**< initialized priority */           \
+    _RT_SCHED_THREAD_CTX_PRIO_EXT;                                             \
+    rt_uint32_t number_mask; /**< priority number mask */
+
+#define RT_SCHED_PRIV(thread) (*thread)
+#define RT_SCHED_CTX(thread) (*thread)
+
+/**
+ * Convert a list node in container RT_SCHED_CTX(thread)->thread_list_node
+ * to a thread pointer.
+ */
+#define RT_THREAD_LIST_NODE_ENTRY(node) rt_list_entry((node), struct rt_thread, tlist)
+#define RT_THREAD_LIST_NODE(thread) (RT_SCHED_CTX(thread).tlist)
+
+#endif /* RT_USING_SCHED_THREAD_CTX */
+
+/**
+ * System Scheduler Locking
+ */
+
+typedef rt_ubase_t rt_sched_lock_level_t;
+
+rt_err_t rt_sched_lock(rt_sched_lock_level_t *plvl);
+rt_err_t rt_sched_unlock(rt_sched_lock_level_t level);
+rt_err_t rt_sched_unlock_n_resched(rt_sched_lock_level_t level);
+
+rt_bool_t rt_sched_is_locked(void);
+
+#ifdef RT_USING_SMP
+#define RT_SCHED_DEBUG_IS_LOCKED do { RT_ASSERT(rt_sched_is_locked()); } while (0)
+#define RT_SCHED_DEBUG_IS_UNLOCKED do { RT_ASSERT(!rt_sched_is_locked()); } while (0)
+
+#else /* !RT_USING_SMP */
+
+#define RT_SCHED_DEBUG_IS_LOCKED
+#define RT_SCHED_DEBUG_IS_UNLOCKED
+#endif /* RT_USING_SMP */
+
+/**
+ * NOTE: user should NEVER use these APIs directly. See rt_thread_.* or IPC
+ * methods instead.
+ */
+#if defined(__RT_KERNEL_SOURCE__) || defined(__RT_IPC_SOURCE__)
+
+/* thread initialization and startup routine */
+void rt_sched_thread_init_ctx(struct rt_thread *thread, rt_uint32_t tick, rt_uint8_t priority);
+void rt_sched_thread_init_priv(struct rt_thread *thread, rt_uint32_t tick, rt_uint8_t priority);
+void rt_sched_thread_startup(struct rt_thread *thread);
+
+/* scheduler related routine */
+void rt_sched_post_ctx_switch(struct rt_thread *thread);
+rt_err_t rt_sched_tick_increase(void);
+
+/* thread status operation */
+rt_uint8_t rt_sched_thread_get_stat(struct rt_thread *thread);
+rt_uint8_t rt_sched_thread_get_curr_prio(struct rt_thread *thread);
+rt_uint8_t rt_sched_thread_get_init_prio(struct rt_thread *thread);
+rt_err_t rt_sched_thread_yield(struct rt_thread *thread);
+rt_err_t rt_sched_thread_close(struct rt_thread *thread);
+rt_err_t rt_sched_thread_ready(struct rt_thread *thread);
+rt_err_t rt_sched_thread_suspend(struct rt_thread *thread, rt_sched_lock_level_t level);
+rt_err_t rt_sched_thread_change_priority(struct rt_thread *thread, rt_uint8_t priority);
+rt_err_t rt_sched_thread_bind_cpu(struct rt_thread *thread, int cpu);
+rt_uint8_t rt_sched_thread_is_suspended(struct rt_thread *thread);
+rt_err_t rt_sched_thread_timer_stop(struct rt_thread *thread);
+rt_err_t rt_sched_thread_timer_start(struct rt_thread *thread);
+void rt_sched_insert_thread(struct rt_thread *thread);
+void rt_sched_remove_thread(struct rt_thread *thread);
+
+#endif /* defined(__RT_KERNEL_SOURCE__) || defined(__RT_IPC_SOURCE__) */
+
+#endif /* __RT_SCHED_H__ */

include/rtthread.h

@@ -21,6 +21,7 @@
  * 2023-06-30     ChuShicheng  move debug check from the rtdebug.h
  * 2023-10-16     Shell        Support a new backtrace framework
  * 2023-12-10     xqyjlj       fix spinlock in up
+ * 2024-01-25     Shell        Add rt_susp_list for IPC primitives
  */
 
 #ifndef __RT_THREAD_H__
@@ -173,7 +174,6 @@ rt_err_t rt_thread_resume(rt_thread_t thread);
 rt_err_t rt_thread_wakeup(rt_thread_t thread);
 void rt_thread_wakeup_set(struct rt_thread *thread, rt_wakeup_func_t func, void* user_data);
 #endif /* RT_USING_SMART */
-void rt_thread_timeout(void *parameter);
 rt_err_t rt_thread_get_name(rt_thread_t thread, char *name, rt_uint8_t name_size);
 #ifdef RT_USING_SIGNALS
 void rt_thread_alloc_sig(rt_thread_t tid);
@@ -212,11 +212,10 @@ void rt_system_scheduler_start(void);
 
 void rt_schedule(void);
 void rt_scheduler_do_irq_switch(void *context);
-void rt_schedule_insert_thread(struct rt_thread *thread);
-void rt_schedule_remove_thread(struct rt_thread *thread);
 
-void rt_enter_critical(void);
+rt_base_t rt_enter_critical(void);
 void rt_exit_critical(void);
+void rt_exit_critical_safe(rt_base_t critical_level);
 rt_uint16_t rt_critical_level(void);
 
 #ifdef RT_USING_HOOK
@@ -368,6 +367,26 @@ void rt_slab_free(rt_slab_t m, void *ptr);
  * @{
  */
 
+/**
+ * Suspend list - A basic building block for IPC primitives which interacts with
+ *                scheduler directly. Its API is similar to a FIFO list.
+ *
+ * Note: don't use in application codes directly
+ */
+void rt_susp_list_print(rt_list_t *list);
+/* reserve thread error while resuming it */
+#define RT_THREAD_RESUME_RES_THR_ERR (-1)
+struct rt_thread *rt_susp_list_dequeue(rt_list_t *susp_list, rt_err_t thread_error);
+rt_err_t rt_susp_list_resume_all(rt_list_t *susp_list, rt_err_t thread_error);
+rt_err_t rt_susp_list_resume_all_irq(rt_list_t *susp_list,
+                                     rt_err_t thread_error,
+                                     struct rt_spinlock *lock);
+
+/* suspend and enqueue */
+rt_err_t rt_thread_suspend_to_list(rt_thread_t thread, rt_list_t *susp_list, int ipc_flags, int suspend_flag);
+/* only for a suspended thread, and caller must hold the scheduler lock */
+rt_err_t rt_susp_list_enqueue(rt_list_t *susp_list, rt_thread_t thread, int ipc_flags);
+
 #ifdef RT_USING_SEMAPHORE
 /*
  * semaphore interface
@@ -725,11 +744,11 @@ int rt_snprintf(char *buf, rt_size_t size, const char *format, ...);
 #if defined(RT_USING_DEVICE) && defined(RT_USING_CONSOLE)
 rt_device_t rt_console_set_device(const char *name);
 rt_device_t rt_console_get_device(void);
-#ifdef RT_USING_THREDSAFE_PRINTF
+#ifdef RT_USING_THREADSAFE_PRINTF
     rt_thread_t rt_console_current_user(void);
 #else
     rt_inline void *rt_console_current_user(void) { return RT_NULL; }
-#endif /* RT_USING_THREDSAFE_PRINTF */
+#endif /* RT_USING_THREADSAFE_PRINTF */
 #endif /* defined(RT_USING_DEVICE) && defined(RT_USING_CONSOLE) */
 
 rt_err_t rt_get_errno(void);

include/rttypes.h

@@ -0,0 +1,223 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-01-18     Shell        Separate the basic types from rtdef.h
+ */
+
+#ifndef __RT_TYPES_H__
+#define __RT_TYPES_H__
+
+#include <rtconfig.h>
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdarg.h>
+#ifndef RT_USING_NANO
+#include <sys/types.h>
+#include <sys/errno.h>
+#if defined(RT_USING_SIGNALS) || defined(RT_USING_SMART)
+#include <sys/signal.h>
+#endif /* defined(RT_USING_SIGNALS) || defined(RT_USING_SMART) */
+#endif /* RT_USING_NANO */
+
+/**
+ * RT-Thread basic data types definition
+ */
+
+typedef int                             rt_bool_t;      /**< boolean type */
+typedef signed long                     rt_base_t;      /**< Nbit CPU related date type */
+typedef unsigned long                   rt_ubase_t;     /**< Nbit unsigned CPU related data type */
+
+#ifndef RT_USING_ARCH_DATA_TYPE
+#ifdef RT_USING_LIBC
+typedef int8_t                          rt_int8_t;      /**<  8bit integer type */
+typedef int16_t                         rt_int16_t;     /**< 16bit integer type */
+typedef int32_t                         rt_int32_t;     /**< 32bit integer type */
+typedef uint8_t                         rt_uint8_t;     /**<  8bit unsigned integer type */
+typedef uint16_t                        rt_uint16_t;    /**< 16bit unsigned integer type */
+typedef uint32_t                        rt_uint32_t;    /**< 32bit unsigned integer type */
+typedef int64_t                         rt_int64_t;     /**< 64bit integer type */
+typedef uint64_t                        rt_uint64_t;    /**< 64bit unsigned integer type */
+#else
+typedef signed   char                   rt_int8_t;      /**<  8bit integer type */
+typedef signed   short                  rt_int16_t;     /**< 16bit integer type */
+typedef signed   int                    rt_int32_t;     /**< 32bit integer type */
+typedef unsigned char                   rt_uint8_t;     /**<  8bit unsigned integer type */
+typedef unsigned short                  rt_uint16_t;    /**< 16bit unsigned integer type */
+typedef unsigned int                    rt_uint32_t;    /**< 32bit unsigned integer type */
+#ifdef ARCH_CPU_64BIT
+typedef signed long                     rt_int64_t;     /**< 64bit integer type */
+typedef unsigned long                   rt_uint64_t;    /**< 64bit unsigned integer type */
+#else
+typedef signed long long                rt_int64_t;     /**< 64bit integer type */
+typedef unsigned long long              rt_uint64_t;    /**< 64bit unsigned integer type */
+#endif /* ARCH_CPU_64BIT */
+#endif /* RT_USING_LIBC */
+#endif /* RT_USING_ARCH_DATA_TYPE */
+
+#if defined(RT_USING_LIBC) && !defined(RT_USING_NANO)
+typedef size_t                          rt_size_t;      /**< Type for size number */
+typedef ssize_t                         rt_ssize_t;     /**< Used for a count of bytes or an error indication */
+#else
+typedef rt_ubase_t                      rt_size_t;      /**< Type for size number */
+typedef rt_base_t                       rt_ssize_t;     /**< Used for a count of bytes or an error indication */
+#endif /* defined(RT_USING_LIBC) && !defined(RT_USING_NANO) */
+
+typedef rt_base_t                       rt_err_t;       /**< Type for error number */
+typedef rt_uint32_t                     rt_time_t;      /**< Type for time stamp */
+typedef rt_uint32_t                     rt_tick_t;      /**< Type for tick count */
+typedef rt_base_t                       rt_flag_t;      /**< Type for flags */
+typedef rt_ubase_t                      rt_dev_t;       /**< Type for device */
+typedef rt_base_t                       rt_off_t;       /**< Type for offset */
+
+#ifdef __cplusplus
+typedef rt_base_t rt_atomic_t;
+#else
+#if defined(RT_USING_HW_ATOMIC)
+typedef rt_base_t rt_atomic_t;
+#elif defined(RT_USING_STDC_ATOMIC)
+#include <stdatomic.h>
+typedef atomic_size_t rt_atomic_t;
+#else
+typedef rt_base_t rt_atomic_t;
+#endif /* RT_USING_STDC_ATOMIC */
+#endif /* __cplusplus */
+
+/* boolean type definitions */
+#define RT_TRUE                         1               /**< boolean true  */
+#define RT_FALSE                        0               /**< boolean fails */
+
+/* null pointer definition */
+#define RT_NULL                         0
+
+/**
+ * Double List structure
+ */
+struct rt_list_node
+{
+    struct rt_list_node *next;                          /**< point to next node. */
+    struct rt_list_node *prev;                          /**< point to prev node. */
+};
+typedef struct rt_list_node rt_list_t;                  /**< Type for lists. */
+
+/**
+ * Single List structure
+ */
+struct rt_slist_node
+{
+    struct rt_slist_node *next;                         /**< point to next node. */
+};
+typedef struct rt_slist_node rt_slist_t;                /**< Type for single list. */
+
+/**
+ * Spinlock
+ */
+#ifdef RT_USING_SMP
+#include <cpuport.h> /* for spinlock from arch */
+
+struct rt_spinlock
+{
+    rt_hw_spinlock_t lock;
+#ifdef RT_USING_DEBUG
+    rt_uint32_t critical_level;
+#endif /* RT_USING_DEBUG */
+#if defined(RT_DEBUGING_SPINLOCK)
+    void *owner;
+    void *pc;
+#endif /* RT_DEBUGING_SPINLOCK */
+};
+
+#ifdef RT_DEBUGING_SPINLOCK
+
+#define __OWNER_MAGIC ((void *)0xdeadbeaf)
+
+#if defined(__GNUC__)
+#define __GET_RETURN_ADDRESS __builtin_return_address(0)
+#else
+#define __GET_RETURN_ADDRESS RT_NULL
+#endif
+
+#define _SPIN_LOCK_DEBUG_OWNER(lock)                  \
+    do                                                \
+    {                                                 \
+        struct rt_thread *_curthr = rt_thread_self(); \
+        if (_curthr != RT_NULL)                       \
+        {                                             \
+            (lock)->owner = _curthr;                  \
+            (lock)->pc = __GET_RETURN_ADDRESS;        \
+        }                                             \
+    } while (0)
+
+#define _SPIN_UNLOCK_DEBUG_OWNER(lock) \
+    do                                 \
+    {                                  \
+        (lock)->owner = __OWNER_MAGIC; \
+        (lock)->pc = RT_NULL;          \
+    } while (0)
+
+#else
+
+#define _SPIN_LOCK_DEBUG_OWNER(lock)
+#define _SPIN_UNLOCK_DEBUG_OWNER(lock)
+#endif
+
+#ifdef RT_USING_DEBUG
+
+#define _SPIN_LOCK_DEBUG_CRITICAL(lock)                   \
+    do                                                    \
+    {                                                     \
+        struct rt_thread *_curthr = rt_thread_self();     \
+        if (_curthr != RT_NULL)                           \
+        {                                                 \
+            (lock)->critical_level = rt_critical_level(); \
+        }                                                 \
+    } while (0)
+
+#define _SPIN_UNLOCK_DEBUG_CRITICAL(lock, critical) \
+    do                                              \
+    {                                               \
+        (critical) = (lock)->critical_level;        \
+    } while (0)
+
+#else
+
+#define _SPIN_LOCK_DEBUG_CRITICAL(lock)
+#define _SPIN_UNLOCK_DEBUG_CRITICAL(lock, critical) (critical = 0)
+#endif /* RT_USING_DEBUG */
+
+#define RT_SPIN_LOCK_DEBUG(lock)         \
+    do                                   \
+    {                                    \
+        _SPIN_LOCK_DEBUG_OWNER(lock);    \
+        _SPIN_LOCK_DEBUG_CRITICAL(lock); \
+    } while (0)
+
+#define RT_SPIN_UNLOCK_DEBUG(lock, critical)         \
+    do                                               \
+    {                                                \
+        _SPIN_UNLOCK_DEBUG_OWNER(lock);              \
+        _SPIN_UNLOCK_DEBUG_CRITICAL(lock, critical); \
+    } while (0)
+
+#ifndef RT_SPINLOCK_INIT
+#define RT_SPINLOCK_INIT {{0}} /* can be overridden by cpuport.h */
+#endif /* RT_SPINLOCK_INIT */
+
+#else
+
+struct rt_spinlock
+{
+    rt_ubase_t lock;
+};
+#define RT_SPINLOCK_INIT {0}
+#endif /* RT_USING_SMP */
+
+typedef struct rt_spinlock rt_spinlock_t;
+
+#define RT_DEFINE_SPINLOCK(x)  struct rt_spinlock x = RT_SPINLOCK_INIT
+
+#endif /* __RT_TYPES_H__ */

libcpu/aarch64/common/cpuport.h

@@ -13,6 +13,7 @@
 #define  CPUPORT_H__
 
 #include <armv8.h>
+#include <rtcompiler.h>
 #include <rtdef.h>
 
 #ifdef RT_USING_SMP

libcpu/aarch64/cortex-a/entry_point.S

@@ -151,7 +151,7 @@ _secondary_cpu_entry:
 #else
     bl      rt_hw_cpu_id_set
     mrs     x0, tpidr_el1
-#endif
+#endif /* RT_USING_OFW */
 
     /* Set current cpu's stack top */
     sub     x0, x0, #1

libcpu/arm/cortex-a/cpuport.c

@@ -103,4 +103,11 @@ int __rt_ffs(int value)
 }
 #endif
 
+rt_bool_t rt_hw_interrupt_is_disabled(void)
+{
+    int rc;
+    __asm__ volatile("mrs %0, cpsr" : "=r" (rc));
+    return !!(rc & 0x80);
+}
+
 /*@}*/

libcpu/arm/cortex-a/cpuport.h

@@ -10,6 +10,8 @@
 #ifndef  CPUPORT_H__
 #define  CPUPORT_H__
 
+#include <rtcompiler.h>
+
 /* the exception stack without VFP registers */
 struct rt_hw_exp_stack
 {

libcpu/risc-v/virt64/cpuport.c

@@ -56,6 +56,11 @@ void *_rt_hw_stack_init(rt_ubase_t *sp, rt_ubase_t ra, rt_ubase_t sstatus)
     return (void *)sp;
 }
 
+int rt_hw_cpu_id(void)
+{
+    return 0;
+}
+
 /**
  * This function will initialize thread stack, we assuming
  * when scheduler restore this new thread, context will restore

src/Kconfig

@@ -35,6 +35,7 @@ config RT_USING_SMART
     select RT_USING_POSIX_FS
     select RT_USING_POSIX_TERMIOS
     select RT_USING_KTIME
+    select RT_USING_STDC_ATOMIC
     depends on ARCH_ARM_CORTEX_M || ARCH_ARM_ARM9 || ARCH_ARM_CORTEX_A || ARCH_ARMV8 || ARCH_RISCV64
     depends on !RT_USING_NANO
     help
@@ -66,6 +67,7 @@ config RT_USING_AMP
 config RT_USING_SMP
     bool "Enable SMP (Symmetric multiprocessing)"
     default n
+    select RT_USING_SCHED_THREAD_CTX
     help
         This option should be selected by machines which have an SMP-
         capable CPU.
@@ -417,10 +419,18 @@ config RT_USING_INTERRUPT_INFO
     help
         Add name and counter information for interrupt trace.
 
-config RT_USING_THREDSAFE_PRINTF
+config RT_USING_THREADSAFE_PRINTF
     bool "Enable thread safe kernel print service"
     default y if RT_USING_SMP && RT_USING_SMART
 
+config RT_USING_SCHED_THREAD_CTX
+    bool "Using the scheduler thread context"
+    help
+        Using the scheduler thread context embedded in the thread object.
+        This options is only for backward compatible codes. Maybe use as a
+        mandatory option in the future.
+    default y if RT_USING_SMP
+
 config RT_USING_CONSOLE
     bool "Using console for rt_kprintf"
     default y

src/SConscript

@@ -26,8 +26,7 @@ if GetDepend('RT_USING_DEVICE') == False:
 
 if GetDepend('RT_USING_SMP') == False:
     SrcRemove(src, ['cpu.c', 'scheduler_mp.c'])
-
+else:
-if GetDepend('RT_USING_SMP') == True:
     SrcRemove(src, ['scheduler_up.c'])
 
 LOCAL_CFLAGS = ''
@@ -43,6 +42,6 @@ if rtconfig.PLATFORM in GetGCCLikePLATFORM():
         LOCAL_CFLAGS += ' -Wimplicit-fallthrough' # implicit fallthrough warning
         LOCAL_CFLAGS += ' -Wduplicated-cond -Wduplicated-branches' # duplicated condition warning
 
-group = DefineGroup('Kernel', src, depend=[''], CPPPATH=inc, CPPDEFINES=['__RTTHREAD__'], LOCAL_CFLAGS=LOCAL_CFLAGS)
+group = DefineGroup('Kernel', src, depend=[''], CPPPATH=inc, CPPDEFINES=['__RTTHREAD__'], LOCAL_CFLAGS=LOCAL_CFLAGS, LOCAL_CPPDEFINES=['__RT_KERNEL_SOURCE__'])
 
 Return('group')

src/clock.c

@@ -85,34 +85,19 @@ void rt_tick_set(rt_tick_t tick)
  */
 void rt_tick_increase(void)
 {
-    struct rt_thread *thread;
-    rt_base_t level;
-    rt_atomic_t oldval = 0;
-
     RT_ASSERT(rt_interrupt_get_nest() > 0);
 
     RT_OBJECT_HOOK_CALL(rt_tick_hook, ());
     /* increase the global tick */
 #ifdef RT_USING_SMP
+    /* get percpu and increase the tick */
     rt_atomic_add(&(rt_cpu_self()->tick), 1);
 #else
     rt_atomic_add(&(rt_tick), 1);
 #endif /* RT_USING_SMP */
 
     /* check time slice */
-    thread = rt_thread_self();
+    rt_sched_tick_increase();
-    level = rt_spin_lock_irqsave(&(thread->spinlock));
-    rt_atomic_sub(&(thread->remaining_tick), 1);
-    if (rt_atomic_compare_exchange_strong(&(thread->remaining_tick), &oldval, thread->init_tick))
-    {
-        thread->stat |= RT_THREAD_STAT_YIELD;
-        rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-        rt_schedule();
-    }
-    else
-    {
-        rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-    }
 
     /* check timer */
 #ifdef RT_USING_SMP

src/cpu.c

@@ -8,6 +8,7 @@
  * 2018-10-30     Bernard      The first version
  * 2023-09-15     xqyjlj       perf rt_hw_interrupt_disable/enable
  * 2023-12-10     xqyjlj       spinlock should lock sched
+ * 2024-01-25     Shell        Using rt_exit_critical_safe
  */
 #include <rthw.h>
 #include <rtthread.h>
@@ -16,6 +17,10 @@
 #include <lwp.h>
 #endif
 
+#ifdef RT_USING_DEBUG
+rt_base_t _cpus_critical_level;
+#endif /* RT_USING_DEBUG */
+
 #ifdef RT_USING_SMP
 static struct rt_cpu _cpus[RT_CPUS_NR];
 rt_hw_spinlock_t _cpus_lock;
@@ -23,14 +28,6 @@ rt_hw_spinlock_t _cpus_lock;
 void *_cpus_lock_owner = 0;
 void *_cpus_lock_pc = 0;
 
-#define __OWNER_MAGIC ((void *)0xdeadbeaf)
-
-#if defined (__GNUC__)
-#define __GET_RETURN_ADDRESS __builtin_return_address(0)
-#else
-#define __GET_RETURN_ADDRESS RT_NULL
-#endif
-
 #endif /* RT_DEBUGING_SPINLOCK */
 
 /**
@@ -56,13 +53,7 @@ void rt_spin_lock(struct rt_spinlock *lock)
 {
     rt_enter_critical();
     rt_hw_spin_lock(&lock->lock);
-#if defined(RT_DEBUGING_SPINLOCK)
+    RT_SPIN_LOCK_DEBUG(lock);
-    if (rt_cpu_self() != RT_NULL)
-    {
-        lock->owner = rt_cpu_self()->current_thread;
-    }
-    lock->pc = __GET_RETURN_ADDRESS;
-#endif /* RT_DEBUGING_SPINLOCK */
 }
 RTM_EXPORT(rt_spin_lock)
 
@@ -73,12 +64,10 @@ RTM_EXPORT(rt_spin_lock)
  */
 void rt_spin_unlock(struct rt_spinlock *lock)
 {
+    rt_base_t critical_level;
+    RT_SPIN_UNLOCK_DEBUG(lock, critical_level);
     rt_hw_spin_unlock(&lock->lock);
-#if defined(RT_DEBUGING_SPINLOCK)
+    rt_exit_critical_safe(critical_level);
-    lock->owner = __OWNER_MAGIC;
-    lock->pc = RT_NULL;
-#endif /* RT_DEBUGING_SPINLOCK */
-    rt_exit_critical();
 }
 RTM_EXPORT(rt_spin_unlock)
 
@@ -99,13 +88,7 @@ rt_base_t rt_spin_lock_irqsave(struct rt_spinlock *lock)
     level = rt_hw_local_irq_disable();
     rt_enter_critical();
     rt_hw_spin_lock(&lock->lock);
-#if defined(RT_DEBUGING_SPINLOCK)
+    RT_SPIN_LOCK_DEBUG(lock);
-    if (rt_cpu_self() != RT_NULL)
-    {
-        lock->owner = rt_cpu_self()->current_thread;
-        lock->pc = __GET_RETURN_ADDRESS;
-    }
-#endif /* RT_DEBUGING_SPINLOCK */
     return level;
 }
 RTM_EXPORT(rt_spin_lock_irqsave)
@@ -119,13 +102,12 @@ RTM_EXPORT(rt_spin_lock_irqsave)
  */
 void rt_spin_unlock_irqrestore(struct rt_spinlock *lock, rt_base_t level)
 {
-#if defined(RT_DEBUGING_SPINLOCK)
+    rt_base_t critical_level;
-    lock->owner = __OWNER_MAGIC;
+
-    lock->pc = RT_NULL;
+    RT_SPIN_UNLOCK_DEBUG(lock, critical_level);
-#endif /* RT_DEBUGING_SPINLOCK */
     rt_hw_spin_unlock(&lock->lock);
     rt_hw_local_irq_enable(level);
-    rt_exit_critical();
+    rt_exit_critical_safe(critical_level);
 }
 RTM_EXPORT(rt_spin_unlock_irqrestore)
 
@@ -162,7 +144,6 @@ rt_base_t rt_cpus_lock(void)
     struct rt_cpu* pcpu;
 
     level = rt_hw_local_irq_disable();
-    rt_enter_critical();
     pcpu = rt_cpu_self();
     if (pcpu->current_thread != RT_NULL)
     {
@@ -171,11 +152,16 @@ rt_base_t rt_cpus_lock(void)
         rt_atomic_add(&(pcpu->current_thread->cpus_lock_nest), 1);
         if (lock_nest == 0)
         {
+            rt_enter_critical();
             rt_hw_spin_lock(&_cpus_lock);
-#if defined(RT_DEBUGING_SPINLOCK)
+#ifdef RT_USING_DEBUG
+            _cpus_critical_level = rt_critical_level();
+#endif /* RT_USING_DEBUG */
+
+#ifdef RT_DEBUGING_SPINLOCK
             _cpus_lock_owner = pcpu->current_thread;
             _cpus_lock_pc = __GET_RETURN_ADDRESS;
-#endif
+#endif /* RT_DEBUGING_SPINLOCK */
         }
     }
 
@@ -194,6 +180,7 @@ void rt_cpus_unlock(rt_base_t level)
 
     if (pcpu->current_thread != RT_NULL)
     {
+        rt_base_t critical_level = 0;
         RT_ASSERT(rt_atomic_load(&(pcpu->current_thread->cpus_lock_nest)) > 0);
         rt_atomic_sub(&(pcpu->current_thread->cpus_lock_nest), 1);
 
@@ -202,12 +189,16 @@ void rt_cpus_unlock(rt_base_t level)
 #if defined(RT_DEBUGING_SPINLOCK)
             _cpus_lock_owner = __OWNER_MAGIC;
             _cpus_lock_pc = RT_NULL;
-#endif
+#endif /* RT_DEBUGING_SPINLOCK */
+#ifdef RT_USING_DEBUG
+            critical_level = _cpus_critical_level;
+            _cpus_critical_level = 0;
+#endif /* RT_USING_DEBUG */
             rt_hw_spin_unlock(&_cpus_lock);
+            rt_exit_critical_safe(critical_level);
         }
     }
     rt_hw_local_irq_enable(level);
-    rt_exit_critical();
 }
 RTM_EXPORT(rt_cpus_unlock);
 
@@ -220,20 +211,10 @@ RTM_EXPORT(rt_cpus_unlock);
  */
 void rt_cpus_lock_status_restore(struct rt_thread *thread)
 {
-    struct rt_cpu* pcpu = rt_cpu_self();
-
 #if defined(ARCH_MM_MMU) && defined(RT_USING_SMART)
     lwp_aspace_switch(thread);
 #endif
-    if (pcpu->current_thread != RT_NULL )
+    rt_sched_post_ctx_switch(thread);
-    {
-        rt_hw_spin_unlock(&(pcpu->current_thread->spinlock.lock));
-        if ((pcpu->current_thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_RUNNING)
-        {
-            rt_schedule_insert_thread(pcpu->current_thread);
-        }
-    }
-    pcpu->current_thread = thread;
 }
 RTM_EXPORT(rt_cpus_lock_status_restore);
 #endif /* RT_USING_SMP */

src/idle.c

@@ -146,7 +146,7 @@ void rt_thread_defunct_enqueue(rt_thread_t thread)
 {
     rt_base_t level;
     level = rt_spin_lock_irqsave(&_defunct_spinlock);
-    rt_list_insert_after(&_rt_thread_defunct, &thread->tlist);
+    rt_list_insert_after(&_rt_thread_defunct, &RT_THREAD_LIST_NODE(thread));
     rt_spin_unlock_irqrestore(&_defunct_spinlock, level);
 #ifdef RT_USING_SMP
     rt_sem_release(&system_sem);
@@ -166,20 +166,16 @@ rt_thread_t rt_thread_defunct_dequeue(void)
     level = rt_spin_lock_irqsave(&_defunct_spinlock);
     if (l->next != l)
     {
-        thread = rt_list_entry(l->next,
+        thread = RT_THREAD_LIST_NODE_ENTRY(l->next);
-                struct rt_thread,
+        rt_list_remove(&RT_THREAD_LIST_NODE(thread));
-                tlist);
-        rt_list_remove(&(thread->tlist));
     }
     rt_spin_unlock_irqrestore(&_defunct_spinlock, level);
 #else
     if (l->next != l)
     {
-        thread = rt_list_entry(l->next,
+        thread = RT_THREAD_LIST_NODE_ENTRY(l->next);
-                struct rt_thread,
-                tlist);
         level = rt_hw_interrupt_disable();
-        rt_list_remove(&(thread->tlist));
+        rt_list_remove(&RT_THREAD_LIST_NODE(thread));
         rt_hw_interrupt_enable(level);
     }
 #endif
@@ -311,6 +307,7 @@ static void rt_thread_system_entry(void *parameter)
         int ret = rt_sem_take(&system_sem, RT_WAITING_FOREVER);
         if (ret != RT_EOK)
         {
+            rt_kprintf("failed to sem_take() error %d\n", ret);
             RT_ASSERT(0);
         }
         rt_defunct_execute();

src/kservice.c

@@ -1500,14 +1500,21 @@ rt_weak void rt_hw_console_output(const char *str)
 }
 RTM_EXPORT(rt_hw_console_output);
 
-#ifdef RT_USING_THREDSAFE_PRINTF
+#ifdef RT_USING_THREADSAFE_PRINTF
 
-static struct rt_spinlock _pr_lock = RT_SPINLOCK_INIT;
+/* system console lock */
-static struct rt_spinlock _prf_lock = RT_SPINLOCK_INIT;
+static struct rt_spinlock _syscon_lock = RT_SPINLOCK_INIT;
+/* lock of kprintf buffer */
+static struct rt_spinlock _prbuf_lock = RT_SPINLOCK_INIT;
 /* current user of system console */
 static rt_thread_t _pr_curr_user;
+
+#ifdef RT_USING_DEBUG
+static rt_base_t _pr_critical_level;
+#endif /* RT_USING_DEBUG */
+
 /* nested level of current user */
-static int _pr_curr_user_nested;
+static volatile int _pr_curr_user_nested;
 
 rt_thread_t rt_console_current_user(void)
 {
@@ -1516,35 +1523,42 @@ rt_thread_t rt_console_current_user(void)
 
 static void _console_take(void)
 {
-    rt_ubase_t level = rt_spin_lock_irqsave(&_pr_lock);
+    rt_ubase_t level = rt_spin_lock_irqsave(&_syscon_lock);
     rt_thread_t self_thread = rt_thread_self();
+    rt_base_t critical_level;
+    RT_UNUSED(critical_level);
 
     while (_pr_curr_user != self_thread)
     {
         if (_pr_curr_user == RT_NULL)
         {
             /* no preemption is allowed to avoid dead lock */
-            rt_enter_critical();
+            critical_level = rt_enter_critical();
+#ifdef RT_USING_DEBUG
+            _pr_critical_level = _syscon_lock.critical_level;
+            _syscon_lock.critical_level = critical_level;
+#endif
             _pr_curr_user = self_thread;
             break;
         }
         else
         {
-            rt_spin_unlock_irqrestore(&_pr_lock, level);
+            rt_spin_unlock_irqrestore(&_syscon_lock, level);
             rt_thread_yield();
-            level = rt_spin_lock_irqsave(&_pr_lock);
+            level = rt_spin_lock_irqsave(&_syscon_lock);
         }
     }
 
     _pr_curr_user_nested++;
 
-    rt_spin_unlock_irqrestore(&_pr_lock, level);
+    rt_spin_unlock_irqrestore(&_syscon_lock, level);
 }
 
 static void _console_release(void)
 {
-    rt_ubase_t level = rt_spin_lock_irqsave(&_pr_lock);
+    rt_ubase_t level = rt_spin_lock_irqsave(&_syscon_lock);
     rt_thread_t self_thread = rt_thread_self();
+    RT_UNUSED(self_thread);
 
     RT_ASSERT(_pr_curr_user == self_thread);
 
@@ -1552,22 +1566,28 @@ static void _console_release(void)
     if (!_pr_curr_user_nested)
     {
         _pr_curr_user = RT_NULL;
+
+#ifdef RT_USING_DEBUG
+        rt_exit_critical_safe(_syscon_lock.critical_level);
+        _syscon_lock.critical_level = _pr_critical_level;
+#else
         rt_exit_critical();
+#endif
     }
-    rt_spin_unlock_irqrestore(&_pr_lock, level);
+    rt_spin_unlock_irqrestore(&_syscon_lock, level);
 }
 
 #define CONSOLE_TAKE          _console_take()
 #define CONSOLE_RELEASE       _console_release()
-#define PRINTF_BUFFER_TAKE    rt_ubase_t level = rt_spin_lock_irqsave(&_prf_lock)
+#define PRINTF_BUFFER_TAKE    rt_ubase_t level = rt_spin_lock_irqsave(&_prbuf_lock)
-#define PRINTF_BUFFER_RELEASE rt_spin_unlock_irqrestore(&_prf_lock, level)
+#define PRINTF_BUFFER_RELEASE rt_spin_unlock_irqrestore(&_prbuf_lock, level)
 #else
 
 #define CONSOLE_TAKE
 #define CONSOLE_RELEASE
 #define PRINTF_BUFFER_TAKE
 #define PRINTF_BUFFER_RELEASE
-#endif /* RT_USING_THREDSAFE_PRINTF */
+#endif /* RT_USING_THREADSAFE_PRINTF */
 
 /**
  * @brief This function will put string to the console.

src/mempool.c

@@ -141,7 +141,6 @@ RTM_EXPORT(rt_mp_init);
  */
 rt_err_t rt_mp_detach(struct rt_mempool *mp)
 {
-    struct rt_thread *thread;
     rt_base_t level;
 
     /* parameter check */
@@ -151,21 +150,7 @@ rt_err_t rt_mp_detach(struct rt_mempool *mp)
 
     level = rt_spin_lock_irqsave(&(mp->spinlock));
     /* wake up all suspended threads */
-    while (!rt_list_isempty(&(mp->suspend_thread)))
+    rt_susp_list_resume_all(&mp->suspend_thread, RT_ERROR);
-    {
-
-        /* get next suspend thread */
-        thread = rt_list_entry(mp->suspend_thread.next, struct rt_thread, tlist);
-        /* set error code to -RT_ERROR */
-        thread->error = -RT_ERROR;
-
-        /*
-         * resume thread
-         * In rt_thread_resume function, it will remove current thread from
-         * suspend list
-         */
-        rt_thread_resume(thread);
-    }
 
     /* detach object */
     rt_object_detach(&(mp->parent));
@@ -257,7 +242,6 @@ RTM_EXPORT(rt_mp_create);
  */
 rt_err_t rt_mp_delete(rt_mp_t mp)
 {
-    struct rt_thread *thread;
     rt_base_t level;
 
     RT_DEBUG_NOT_IN_INTERRUPT;
@@ -269,20 +253,7 @@ rt_err_t rt_mp_delete(rt_mp_t mp)
 
     level = rt_spin_lock_irqsave(&(mp->spinlock));
     /* wake up all suspended threads */
-    while (!rt_list_isempty(&(mp->suspend_thread)))
+    rt_susp_list_resume_all(&mp->suspend_thread, RT_ERROR);
-    {
-        /* get next suspend thread */
-        thread = rt_list_entry(mp->suspend_thread.next, struct rt_thread, tlist);
-        /* set error code to -RT_ERROR */
-        thread->error = -RT_ERROR;
-
-        /*
-         * resume thread
-         * In rt_thread_resume function, it will remove current thread from
-         * suspend list
-         */
-        rt_thread_resume(thread);
-    }
 
     rt_spin_unlock_irqrestore(&(mp->spinlock), level);
 
@@ -339,8 +310,7 @@ void *rt_mp_alloc(rt_mp_t mp, rt_int32_t time)
         thread->error = RT_EOK;
 
         /* need suspend thread */
-        rt_thread_suspend(thread);
+        rt_thread_suspend_to_list(thread, &mp->suspend_thread, RT_IPC_FLAG_FIFO, RT_UNINTERRUPTIBLE);
-        rt_list_insert_after(&(mp->suspend_thread), &(thread->tlist));
 
         if (time > 0)
         {
@@ -403,7 +373,6 @@ void rt_mp_free(void *block)
 {
     rt_uint8_t **block_ptr;
     struct rt_mempool *mp;
-    struct rt_thread *thread;
     rt_base_t level;
 
     /* parameter check */
@@ -424,19 +393,8 @@ void rt_mp_free(void *block)
     *block_ptr = mp->block_list;
     mp->block_list = (rt_uint8_t *)block_ptr;
 
-    if (!rt_list_isempty(&(mp->suspend_thread)))
+    if (rt_susp_list_dequeue(&mp->suspend_thread, RT_EOK))
     {
-        /* get the suspended thread */
-        thread = rt_list_entry(mp->suspend_thread.next,
-                               struct rt_thread,
-                               tlist);
-
-        /* set error */
-        thread->error = RT_EOK;
-
-        /* resume thread */
-        rt_thread_resume(thread);
-
         rt_spin_unlock_irqrestore(&(mp->spinlock), level);
 
         /* do a schedule */

src/scheduler_comm.c

@@ -0,0 +1,217 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * (scheduler_comm.c) Common API of scheduling routines.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-01-18     Shell        Separate scheduling related codes from thread.c, scheduler_.*
+ */
+
+#define DBG_TAG           "kernel.sched"
+#define DBG_LVL           DBG_INFO
+#include <rtdbg.h>
+
+#include <rtthread.h>
+
+void rt_sched_thread_init_ctx(struct rt_thread *thread, rt_uint32_t tick, rt_uint8_t priority)
+{
+    /* setup thread status */
+    RT_SCHED_CTX(thread).stat  = RT_THREAD_INIT;
+
+#ifdef RT_USING_SMP
+    /* not bind on any cpu */
+    RT_SCHED_CTX(thread).bind_cpu = RT_CPUS_NR;
+    RT_SCHED_CTX(thread).oncpu = RT_CPU_DETACHED;
+#endif /* RT_USING_SMP */
+
+    rt_sched_thread_init_priv(thread, tick, priority);
+}
+
+rt_err_t rt_sched_thread_timer_start(struct rt_thread *thread)
+{
+    RT_SCHED_DEBUG_IS_LOCKED;
+    RT_SCHED_CTX(thread).sched_flag_ttmr_set = 1;
+    return RT_EOK;
+}
+
+rt_err_t rt_sched_thread_timer_stop(struct rt_thread *thread)
+{
+    rt_err_t error;
+    RT_SCHED_DEBUG_IS_LOCKED;
+
+    if (RT_SCHED_CTX(thread).sched_flag_ttmr_set)
+    {
+        error = rt_timer_stop(&thread->thread_timer);
+
+        /* mask out timer flag no matter stop success or not */
+        RT_SCHED_CTX(thread).sched_flag_ttmr_set = 0;
+    }
+    else
+    {
+        error = RT_EOK;
+    }
+    return error;
+}
+
+rt_uint8_t rt_sched_thread_get_stat(struct rt_thread *thread)
+{
+    RT_SCHED_DEBUG_IS_LOCKED;
+    return RT_SCHED_CTX(thread).stat & RT_THREAD_STAT_MASK;
+}
+
+rt_uint8_t rt_sched_thread_get_curr_prio(struct rt_thread *thread)
+{
+    RT_SCHED_DEBUG_IS_LOCKED;
+    return RT_SCHED_PRIV(thread).current_priority;
+}
+
+rt_uint8_t rt_sched_thread_get_init_prio(struct rt_thread *thread)
+{
+    /* read only fields, so lock is unecessary */
+    return RT_SCHED_PRIV(thread).init_priority;
+}
+
+/**
+ * @note Caller must hold the scheduler lock
+ */
+rt_uint8_t rt_sched_thread_is_suspended(struct rt_thread *thread)
+{
+    RT_SCHED_DEBUG_IS_LOCKED;
+    return (RT_SCHED_CTX(thread).stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK;
+}
+
+rt_err_t rt_sched_thread_close(struct rt_thread *thread)
+{
+    RT_SCHED_DEBUG_IS_LOCKED;
+    RT_SCHED_CTX(thread).stat = RT_THREAD_CLOSE;
+    return RT_EOK;
+}
+
+rt_err_t rt_sched_thread_yield(struct rt_thread *thread)
+{
+    RT_SCHED_DEBUG_IS_LOCKED;
+
+    RT_SCHED_PRIV(thread).remaining_tick = RT_SCHED_PRIV(thread).init_tick;
+    RT_SCHED_CTX(thread).stat |= RT_THREAD_STAT_YIELD;
+
+    return RT_EOK;
+}
+
+rt_err_t rt_sched_thread_ready(struct rt_thread *thread)
+{
+    rt_err_t error;
+
+    RT_SCHED_DEBUG_IS_LOCKED;
+
+    if (!rt_sched_thread_is_suspended(thread))
+    {
+        /* failed to proceed, and that's possibly due to a racing condition */
+        error = -RT_EINVAL;
+    }
+    else
+    {
+        if (RT_SCHED_CTX(thread).sched_flag_ttmr_set)
+        {
+            /**
+             * Quiet timeout timer first if set. and don't continue if we
+             * failed, because it probably means that a timeout ISR racing to
+             * resume thread before us.
+             */
+            error = rt_sched_thread_timer_stop(thread);
+        }
+        else
+        {
+            error = RT_EOK;
+        }
+
+        if (!error)
+        {
+            /* remove from suspend list */
+            rt_list_remove(&RT_THREAD_LIST_NODE(thread));
+
+        #ifdef RT_USING_SMART
+            thread->wakeup_handle.func = RT_NULL;
+        #endif
+
+            /* insert to schedule ready list and remove from susp list */
+            rt_sched_insert_thread(thread);
+        }
+    }
+
+    return error;
+}
+
+rt_err_t rt_sched_tick_increase(void)
+{
+    struct rt_thread *thread;
+    rt_sched_lock_level_t slvl;
+
+    thread = rt_thread_self();
+
+    rt_sched_lock(&slvl);
+
+    RT_SCHED_PRIV(thread).remaining_tick--;
+    if (RT_SCHED_PRIV(thread).remaining_tick)
+    {
+        rt_sched_unlock(slvl);
+    }
+    else
+    {
+        rt_sched_thread_yield(thread);
+
+        /* request a rescheduling even though we are probably in an ISR */
+        rt_sched_unlock_n_resched(slvl);
+    }
+
+    return RT_EOK;
+}
+
+/**
+ * @brief Update priority of the target thread
+ */
+rt_err_t rt_sched_thread_change_priority(struct rt_thread *thread, rt_uint8_t priority)
+{
+    RT_ASSERT(priority < RT_THREAD_PRIORITY_MAX);
+    RT_SCHED_DEBUG_IS_LOCKED;
+
+    /* for ready thread, change queue; otherwise simply update the priority */
+    if ((RT_SCHED_CTX(thread).stat & RT_THREAD_STAT_MASK) == RT_THREAD_READY)
+    {
+        /* remove thread from schedule queue first */
+        rt_sched_remove_thread(thread);
+
+        /* change thread priority */
+        RT_SCHED_PRIV(thread).current_priority = priority;
+
+        /* recalculate priority attribute */
+#if RT_THREAD_PRIORITY_MAX > 32
+        RT_SCHED_PRIV(thread).number = RT_SCHED_PRIV(thread).current_priority >> 3;               /* 5bit */
+        RT_SCHED_PRIV(thread).number_mask = 1 << RT_SCHED_PRIV(thread).number;
+        RT_SCHED_PRIV(thread).high_mask = 1 << (RT_SCHED_PRIV(thread).current_priority & 0x07);   /* 3bit */
+#else
+        RT_SCHED_PRIV(thread).number_mask = 1 << RT_SCHED_PRIV(thread).current_priority;
+#endif /* RT_THREAD_PRIORITY_MAX > 32 */
+        RT_SCHED_CTX(thread).stat = RT_THREAD_INIT;
+
+        /* insert thread to schedule queue again */
+        rt_sched_insert_thread(thread);
+    }
+    else
+    {
+        RT_SCHED_PRIV(thread).current_priority = priority;
+
+        /* recalculate priority attribute */
+#if RT_THREAD_PRIORITY_MAX > 32
+        RT_SCHED_PRIV(thread).number = RT_SCHED_PRIV(thread).current_priority >> 3;               /* 5bit */
+        RT_SCHED_PRIV(thread).number_mask = 1 << RT_SCHED_PRIV(thread).number;
+        RT_SCHED_PRIV(thread).high_mask = 1 << (RT_SCHED_PRIV(thread).current_priority & 0x07);   /* 3bit */
+#else
+        RT_SCHED_PRIV(thread).number_mask = 1 << RT_SCHED_PRIV(thread).current_priority;
+#endif /* RT_THREAD_PRIORITY_MAX > 32 */
+    }
+
+    return RT_EOK;
+}

src/scheduler_up.c

@@ -161,15 +161,44 @@ static struct rt_thread* _scheduler_get_highest_priority_thread(rt_ubase_t *high
 #endif /* RT_THREAD_PRIORITY_MAX > 32 */
 
     /* get highest ready priority thread */
-    highest_priority_thread = rt_list_entry(rt_thread_priority_table[highest_ready_priority].next,
+    highest_priority_thread = RT_THREAD_LIST_NODE_ENTRY(rt_thread_priority_table[highest_ready_priority].next);
-                              struct rt_thread,
-                              tlist);
 
     *highest_prio = highest_ready_priority;
 
     return highest_priority_thread;
 }
 
+rt_err_t rt_sched_lock(rt_sched_lock_level_t *plvl)
+{
+    rt_base_t level;
+    if (!plvl)
+        return -RT_EINVAL;
+
+    level = rt_hw_interrupt_disable();
+    *plvl = level;
+
+    return RT_EOK;
+}
+
+rt_err_t rt_sched_unlock(rt_sched_lock_level_t level)
+{
+    rt_hw_interrupt_enable(level);
+
+    return RT_EOK;
+}
+
+rt_err_t rt_sched_unlock_n_resched(rt_sched_lock_level_t level)
+{
+    if (rt_thread_self())
+    {
+        /* if scheduler is available */
+        rt_schedule();
+    }
+    rt_hw_interrupt_enable(level);
+
+    return RT_EOK;
+}
+
 /**
  * @brief This function will initialize the system scheduler.
  */
@@ -208,8 +237,8 @@ void rt_system_scheduler_start(void)
 
     rt_current_thread = to_thread;
 
-    rt_schedule_remove_thread(to_thread);
+    rt_sched_remove_thread(to_thread);
-    to_thread->stat = RT_THREAD_RUNNING;
+    RT_SCHED_CTX(to_thread).stat = RT_THREAD_RUNNING;
 
     /* switch to new thread */
 
@@ -250,13 +279,13 @@ void rt_schedule(void)
 
             to_thread = _scheduler_get_highest_priority_thread(&highest_ready_priority);
 
-            if ((rt_current_thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_RUNNING)
+            if ((RT_SCHED_CTX(rt_current_thread).stat & RT_THREAD_STAT_MASK) == RT_THREAD_RUNNING)
             {
-                if (rt_current_thread->current_priority < highest_ready_priority)
+                if (RT_SCHED_PRIV(rt_current_thread).current_priority < highest_ready_priority)
                 {
                     to_thread = rt_current_thread;
                 }
-                else if (rt_current_thread->current_priority == highest_ready_priority && (rt_current_thread->stat & RT_THREAD_STAT_YIELD_MASK) == 0)
+                else if (RT_SCHED_PRIV(rt_current_thread).current_priority == highest_ready_priority && (RT_SCHED_CTX(rt_current_thread).stat & RT_THREAD_STAT_YIELD_MASK) == 0)
                 {
                     to_thread = rt_current_thread;
                 }
@@ -277,16 +306,16 @@ void rt_schedule(void)
 
                 if (need_insert_from_thread)
                 {
-                    rt_schedule_insert_thread(from_thread);
+                    rt_sched_insert_thread(from_thread);
                 }
 
-                if ((from_thread->stat & RT_THREAD_STAT_YIELD_MASK) != 0)
+                if ((RT_SCHED_CTX(from_thread).stat & RT_THREAD_STAT_YIELD_MASK) != 0)
                 {
-                    from_thread->stat &= ~RT_THREAD_STAT_YIELD_MASK;
+                    RT_SCHED_CTX(from_thread).stat &= ~RT_THREAD_STAT_YIELD_MASK;
                 }
 
-                rt_schedule_remove_thread(to_thread);
+                rt_sched_remove_thread(to_thread);
-                to_thread->stat = RT_THREAD_RUNNING | (to_thread->stat & ~RT_THREAD_STAT_MASK);
+                RT_SCHED_CTX(to_thread).stat = RT_THREAD_RUNNING | (RT_SCHED_CTX(to_thread).stat & ~RT_THREAD_STAT_MASK);
 
                 /* switch to new thread */
                 LOG_D("[%d]switch to priority#%d "
@@ -315,11 +344,11 @@ void rt_schedule(void)
 #ifdef RT_USING_SIGNALS
                     /* check stat of thread for signal */
                     level = rt_hw_interrupt_disable();
-                    if (rt_current_thread->stat & RT_THREAD_STAT_SIGNAL_PENDING)
+                    if (RT_SCHED_CTX(rt_current_thread).stat & RT_THREAD_STAT_SIGNAL_PENDING)
                     {
                         extern void rt_thread_handle_sig(rt_bool_t clean_state);
 
-                        rt_current_thread->stat &= ~RT_THREAD_STAT_SIGNAL_PENDING;
+                        RT_SCHED_CTX(rt_current_thread).stat &= ~RT_THREAD_STAT_SIGNAL_PENDING;
 
                         rt_hw_interrupt_enable(level);
 
@@ -343,8 +372,8 @@ void rt_schedule(void)
             }
             else
             {
-                rt_schedule_remove_thread(rt_current_thread);
+                rt_sched_remove_thread(rt_current_thread);
-                rt_current_thread->stat = RT_THREAD_RUNNING | (rt_current_thread->stat & ~RT_THREAD_STAT_MASK);
+                RT_SCHED_CTX(rt_current_thread).stat = RT_THREAD_RUNNING | (RT_SCHED_CTX(rt_current_thread).stat & ~RT_THREAD_STAT_MASK);
             }
         }
     }
@@ -356,6 +385,42 @@ __exit:
     return;
 }
 
+/* Normally, there isn't anyone racing with us so this operation is lockless */
+void rt_sched_thread_startup(struct rt_thread *thread)
+{
+#if RT_THREAD_PRIORITY_MAX > 32
+    RT_SCHED_PRIV(thread).number = RT_SCHED_PRIV(thread).current_priority >> 3;            /* 5bit */
+    RT_SCHED_PRIV(thread).number_mask = 1L << RT_SCHED_PRIV(thread).number;
+    RT_SCHED_PRIV(thread).high_mask = 1L << (RT_SCHED_PRIV(thread).current_priority & 0x07);  /* 3bit */
+#else
+    RT_SCHED_PRIV(thread).number_mask = 1L << RT_SCHED_PRIV(thread).current_priority;
+#endif /* RT_THREAD_PRIORITY_MAX > 32 */
+
+    /* change thread stat, so we can resume it */
+    RT_SCHED_CTX(thread).stat = RT_THREAD_SUSPEND;
+}
+
+void rt_sched_thread_init_priv(struct rt_thread *thread, rt_uint32_t tick, rt_uint8_t priority)
+{
+    rt_list_init(&RT_THREAD_LIST_NODE(thread));
+
+    /* priority init */
+    RT_ASSERT(priority < RT_THREAD_PRIORITY_MAX);
+    RT_SCHED_PRIV(thread).init_priority    = priority;
+    RT_SCHED_PRIV(thread).current_priority = priority;
+
+    /* don't add to scheduler queue as init thread */
+    RT_SCHED_PRIV(thread).number_mask = 0;
+#if RT_THREAD_PRIORITY_MAX > 32
+    RT_SCHED_PRIV(thread).number = 0;
+    RT_SCHED_PRIV(thread).high_mask = 0;
+#endif /* RT_THREAD_PRIORITY_MAX > 32 */
+
+    /* tick init */
+    RT_SCHED_PRIV(thread).init_tick = tick;
+    RT_SCHED_PRIV(thread).remaining_tick = tick;
+}
+
 /**
  * @brief This function will insert a thread to the system ready queue. The state of
  *        thread will be set as READY and the thread will be removed from suspend queue.
@@ -364,7 +429,7 @@ __exit:
  *
  * @note  Please do not invoke this function in user application.
  */
-void rt_schedule_insert_thread(struct rt_thread *thread)
+void rt_sched_insert_thread(struct rt_thread *thread)
 {
     rt_base_t level;
 
@@ -376,33 +441,33 @@ void rt_schedule_insert_thread(struct rt_thread *thread)
     /* it's current thread, it should be RUNNING thread */
     if (thread == rt_current_thread)
     {
-        thread->stat = RT_THREAD_RUNNING | (thread->stat & ~RT_THREAD_STAT_MASK);
+        RT_SCHED_CTX(thread).stat = RT_THREAD_RUNNING | (RT_SCHED_CTX(thread).stat & ~RT_THREAD_STAT_MASK);
         goto __exit;
     }
 
     /* READY thread, insert to ready queue */
-    thread->stat = RT_THREAD_READY | (thread->stat & ~RT_THREAD_STAT_MASK);
+    RT_SCHED_CTX(thread).stat = RT_THREAD_READY | (RT_SCHED_CTX(thread).stat & ~RT_THREAD_STAT_MASK);
     /* there is no time slices left(YIELD), inserting thread before ready list*/
-    if((thread->stat & RT_THREAD_STAT_YIELD_MASK) != 0)
+    if((RT_SCHED_CTX(thread).stat & RT_THREAD_STAT_YIELD_MASK) != 0)
     {
-        rt_list_insert_before(&(rt_thread_priority_table[thread->current_priority]),
+        rt_list_insert_before(&(rt_thread_priority_table[RT_SCHED_PRIV(thread).current_priority]),
-                              &(thread->tlist));
+                              &RT_THREAD_LIST_NODE(thread));
     }
     /* there are some time slices left, inserting thread after ready list to schedule it firstly at next time*/
     else
     {
-        rt_list_insert_after(&(rt_thread_priority_table[thread->current_priority]),
+        rt_list_insert_after(&(rt_thread_priority_table[RT_SCHED_PRIV(thread).current_priority]),
-                              &(thread->tlist));
+                              &RT_THREAD_LIST_NODE(thread));
     }
 
     LOG_D("insert thread[%.*s], the priority: %d",
-          RT_NAME_MAX, thread->parent.name, thread->current_priority);
+          RT_NAME_MAX, thread->parent.name, RT_SCHED_PRIV(rt_current_thread).current_priority);
 
     /* set priority mask */
 #if RT_THREAD_PRIORITY_MAX > 32
-    rt_thread_ready_table[thread->number] |= thread->high_mask;
+    rt_thread_ready_table[RT_SCHED_PRIV(thread).number] |= RT_SCHED_PRIV(thread).high_mask;
 #endif /* RT_THREAD_PRIORITY_MAX > 32 */
-    rt_thread_ready_priority_group |= thread->number_mask;
+    rt_thread_ready_priority_group |= RT_SCHED_PRIV(thread).number_mask;
 
 __exit:
     /* enable interrupt */
@@ -416,7 +481,7 @@ __exit:
  *
  * @note  Please do not invoke this function in user application.
  */
-void rt_schedule_remove_thread(struct rt_thread *thread)
+void rt_sched_remove_thread(struct rt_thread *thread)
 {
     rt_base_t level;
 
@@ -427,20 +492,20 @@ void rt_schedule_remove_thread(struct rt_thread *thread)
 
     LOG_D("remove thread[%.*s], the priority: %d",
           RT_NAME_MAX, thread->parent.name,
-          thread->current_priority);
+          RT_SCHED_PRIV(rt_current_thread).current_priority);
 
     /* remove thread from ready list */
-    rt_list_remove(&(thread->tlist));
+    rt_list_remove(&RT_THREAD_LIST_NODE(thread));
-    if (rt_list_isempty(&(rt_thread_priority_table[thread->current_priority])))
+    if (rt_list_isempty(&(rt_thread_priority_table[RT_SCHED_PRIV(thread).current_priority])))
     {
 #if RT_THREAD_PRIORITY_MAX > 32
-        rt_thread_ready_table[thread->number] &= ~thread->high_mask;
+        rt_thread_ready_table[RT_SCHED_PRIV(thread).number] &= ~RT_SCHED_PRIV(thread).high_mask;
-        if (rt_thread_ready_table[thread->number] == 0)
+        if (rt_thread_ready_table[RT_SCHED_PRIV(thread).number] == 0)
         {
-            rt_thread_ready_priority_group &= ~thread->number_mask;
+            rt_thread_ready_priority_group &= ~RT_SCHED_PRIV(thread).number_mask;
         }
 #else
-        rt_thread_ready_priority_group &= ~thread->number_mask;
+        rt_thread_ready_priority_group &= ~RT_SCHED_PRIV(thread).number_mask;
 #endif /* RT_THREAD_PRIORITY_MAX > 32 */
     }
 
@@ -448,12 +513,54 @@ void rt_schedule_remove_thread(struct rt_thread *thread)
     rt_hw_interrupt_enable(level);
 }
 
+#ifdef RT_USING_DEBUG
+
+static volatile int _critical_error_occurred = 0;
+
+void rt_exit_critical_safe(rt_base_t critical_level)
+{
+    rt_base_t level;
+    /* disable interrupt */
+    level = rt_hw_interrupt_disable();
+
+    if (!_critical_error_occurred)
+    {
+        if (critical_level != rt_scheduler_lock_nest)
+        {
+            int dummy = 1;
+            _critical_error_occurred = 1;
+
+            rt_kprintf("%s: un-compatible critical level\n" \
+                       "\tCurrent %d\n\tCaller %d\n",
+                       __func__, rt_scheduler_lock_nest,
+                       critical_level);
+            rt_backtrace();
+
+            while (dummy) ;
+        }
+    }
+    rt_hw_interrupt_enable(level);
+
+    rt_exit_critical();
+}
+
+#else
+
+void rt_exit_critical_safe(rt_base_t critical_level)
+{
+    return rt_exit_critical();
+}
+
+#endif
+RTM_EXPORT(rt_exit_critical_safe);
+
 /**
  * @brief This function will lock the thread scheduler.
  */
-void rt_enter_critical(void)
+rt_base_t rt_enter_critical(void)
 {
     rt_base_t level;
+    rt_base_t critical_level;
 
     /* disable interrupt */
     level = rt_hw_interrupt_disable();
@@ -463,9 +570,12 @@ void rt_enter_critical(void)
      * enough and does not check here
      */
     rt_scheduler_lock_nest ++;
+    critical_level = rt_scheduler_lock_nest;
 
     /* enable interrupt */
     rt_hw_interrupt_enable(level);
+
+    return critical_level;
 }
 RTM_EXPORT(rt_enter_critical);
 
@@ -511,5 +621,10 @@ rt_uint16_t rt_critical_level(void)
 }
 RTM_EXPORT(rt_critical_level);
 
+rt_err_t rt_sched_thread_bind_cpu(struct rt_thread *thread, int cpu)
+{
+    return -RT_EINVAL;
+}
+
 /**@}*/
 /**@endcond*/

src/signal.c

@@ -29,6 +29,8 @@
 #define sig_mask(sig_no)    (1u << sig_no)
 #define sig_valid(sig_no)   (sig_no >= 0 && sig_no < RT_SIG_MAX)
 
+static struct rt_spinlock _thread_signal_lock = RT_SPINLOCK_INIT;
+
 struct siginfo_node
 {
     siginfo_t si;
@@ -63,7 +65,7 @@ static void _signal_entry(void *parameter)
 #endif /* RT_USING_SMP */
 
     LOG_D("switch back to: 0x%08x\n", tid->sp);
-    tid->stat &= ~RT_THREAD_STAT_SIGNAL;
+    RT_SCHED_CTX(tid).stat &= ~RT_THREAD_STAT_SIGNAL;
 
 #ifdef RT_USING_SMP
     rt_hw_context_switch_to((rt_base_t)&parameter, tid);
@@ -86,16 +88,16 @@ static void _signal_deliver(rt_thread_t tid)
 {
     rt_base_t level;
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
 
     /* thread is not interested in pended signals */
     if (!(tid->sig_pending & tid->sig_mask))
     {
-        rt_hw_interrupt_enable(level);
+        rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
         return;
     }
 
-    if ((tid->stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK)
+    if ((RT_SCHED_CTX(tid).stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK)
     {
         /* resume thread to handle signal */
 #ifdef RT_USING_SMART
@@ -104,9 +106,9 @@ static void _signal_deliver(rt_thread_t tid)
         rt_thread_resume(tid);
 #endif
         /* add signal state */
-        tid->stat |= (RT_THREAD_STAT_SIGNAL | RT_THREAD_STAT_SIGNAL_PENDING);
+        RT_SCHED_CTX(tid).stat |= (RT_THREAD_STAT_SIGNAL | RT_THREAD_STAT_SIGNAL_PENDING);
 
-        rt_hw_interrupt_enable(level);
+        rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 
         /* re-schedule */
         rt_schedule();
@@ -116,9 +118,9 @@ static void _signal_deliver(rt_thread_t tid)
         if (tid == rt_thread_self())
         {
             /* add signal state */
-            tid->stat |= RT_THREAD_STAT_SIGNAL;
+            RT_SCHED_CTX(tid).stat |= RT_THREAD_STAT_SIGNAL;
 
-            rt_hw_interrupt_enable(level);
+            rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 
             /* do signal action in self thread context */
             if (rt_interrupt_get_nest() == 0)
@@ -126,16 +128,16 @@ static void _signal_deliver(rt_thread_t tid)
                 rt_thread_handle_sig(RT_TRUE);
             }
         }
-        else if (!((tid->stat & RT_THREAD_STAT_SIGNAL_MASK) & RT_THREAD_STAT_SIGNAL))
+        else if (!((RT_SCHED_CTX(tid).stat & RT_THREAD_STAT_SIGNAL_MASK) & RT_THREAD_STAT_SIGNAL))
         {
             /* add signal state */
-            tid->stat |= (RT_THREAD_STAT_SIGNAL | RT_THREAD_STAT_SIGNAL_PENDING);
+            RT_SCHED_CTX(tid).stat |= (RT_THREAD_STAT_SIGNAL | RT_THREAD_STAT_SIGNAL_PENDING);
 
 #ifdef RT_USING_SMP
             {
                 int cpu_id;
 
-                cpu_id = tid->oncpu;
+                cpu_id = RT_SCHED_CTX(tid).oncpu;
                 if ((cpu_id != RT_CPU_DETACHED) && (cpu_id != rt_hw_cpu_id()))
                 {
                     rt_uint32_t cpu_mask;
@@ -146,13 +148,13 @@ static void _signal_deliver(rt_thread_t tid)
             }
 #else
             /* point to the signal handle entry */
-            tid->stat &= ~RT_THREAD_STAT_SIGNAL_PENDING;
+            RT_SCHED_CTX(tid).stat &= ~RT_THREAD_STAT_SIGNAL_PENDING;
             tid->sig_ret = tid->sp;
             tid->sp = rt_hw_stack_init((void *)_signal_entry, RT_NULL,
                                        (void *)((char *)tid->sig_ret - 32), RT_NULL);
 #endif /* RT_USING_SMP */
 
-            rt_hw_interrupt_enable(level);
+            rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
             LOG_D("signal stack pointer @ 0x%08x", tid->sp);
 
             /* re-schedule */
@@ -160,7 +162,7 @@ static void _signal_deliver(rt_thread_t tid)
         }
         else
         {
-            rt_hw_interrupt_enable(level);
+            rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
         }
     }
 }
@@ -168,37 +170,38 @@ static void _signal_deliver(rt_thread_t tid)
 #ifdef RT_USING_SMP
 void *rt_signal_check(void* context)
 {
-    rt_base_t level;
+    rt_sched_lock_level_t level;
     int cpu_id;
     struct rt_cpu* pcpu;
     struct rt_thread *current_thread;
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
+
     cpu_id = rt_hw_cpu_id();
     pcpu   = rt_cpu_index(cpu_id);
     current_thread = pcpu->current_thread;
 
     if (pcpu->irq_nest)
     {
-        rt_hw_interrupt_enable(level);
+        rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
         return context;
     }
 
     if (current_thread->cpus_lock_nest == 1)
     {
-        if (current_thread->stat & RT_THREAD_STAT_SIGNAL_PENDING)
+        if (RT_SCHED_CTX(current_thread).stat & RT_THREAD_STAT_SIGNAL_PENDING)
         {
             void *sig_context;
 
-            current_thread->stat &= ~RT_THREAD_STAT_SIGNAL_PENDING;
+            RT_SCHED_CTX(current_thread).stat &= ~RT_THREAD_STAT_SIGNAL_PENDING;
 
-            rt_hw_interrupt_enable(level);
+            rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
             sig_context = rt_hw_stack_init((void *)_signal_entry, context,
                     (void*)((char*)context - 32), RT_NULL);
             return sig_context;
         }
     }
-    rt_hw_interrupt_enable(level);
+    rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
     return context;
 }
 #endif /* RT_USING_SMP */
@@ -227,10 +230,14 @@ rt_sighandler_t rt_signal_install(int signo, rt_sighandler_t handler)
 
     if (!sig_valid(signo)) return SIG_ERR;
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
     if (tid->sig_vectors == RT_NULL)
     {
+        rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
+
         rt_thread_alloc_sig(tid);
+
+        level = rt_spin_lock_irqsave(&_thread_signal_lock);
     }
 
     if (tid->sig_vectors)
@@ -241,7 +248,7 @@ rt_sighandler_t rt_signal_install(int signo, rt_sighandler_t handler)
         else if (handler == SIG_DFL) tid->sig_vectors[signo] = _signal_default_handler;
         else tid->sig_vectors[signo] = handler;
     }
-    rt_hw_interrupt_enable(level);
+    rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 
     return old;
 }
@@ -262,11 +269,11 @@ void rt_signal_mask(int signo)
     rt_base_t level;
     rt_thread_t tid = rt_thread_self();
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
 
     tid->sig_mask &= ~sig_mask(signo);
 
-    rt_hw_interrupt_enable(level);
+    rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 }
 
 /**
@@ -285,19 +292,19 @@ void rt_signal_unmask(int signo)
     rt_base_t level;
     rt_thread_t tid = rt_thread_self();
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
 
     tid->sig_mask |= sig_mask(signo);
 
     /* let thread handle pended signals */
     if (tid->sig_mask & tid->sig_pending)
     {
-        rt_hw_interrupt_enable(level);
+        rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
         _signal_deliver(tid);
     }
     else
     {
-        rt_hw_interrupt_enable(level);
+        rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
     }
 }
 
@@ -335,7 +342,7 @@ int rt_signal_wait(const rt_sigset_t *set, rt_siginfo_t *si, rt_int32_t timeout)
     /* clear siginfo to avoid unknown value */
     memset(si, 0x0, sizeof(rt_siginfo_t));
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
 
     /* already pending */
     if (tid->sig_pending & *set) goto __done;
@@ -349,7 +356,7 @@ int rt_signal_wait(const rt_sigset_t *set, rt_siginfo_t *si, rt_int32_t timeout)
     /* suspend self thread */
     rt_thread_suspend_with_flag(tid, RT_UNINTERRUPTIBLE);
     /* set thread stat as waiting for signal */
-    tid->stat |= RT_THREAD_STAT_SIGNAL_WAIT;
+    RT_SCHED_CTX(tid).stat |= RT_THREAD_STAT_SIGNAL_WAIT;
 
     /* start timeout timer */
     if (timeout != RT_WAITING_FOREVER)
@@ -360,21 +367,21 @@ int rt_signal_wait(const rt_sigset_t *set, rt_siginfo_t *si, rt_int32_t timeout)
                          &timeout);
         rt_timer_start(&(tid->thread_timer));
     }
-    rt_hw_interrupt_enable(level);
+    rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 
     /* do thread scheduling */
     rt_schedule();
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
 
     /* remove signal waiting flag */
-    tid->stat &= ~RT_THREAD_STAT_SIGNAL_WAIT;
+    RT_SCHED_CTX(tid).stat &= ~RT_THREAD_STAT_SIGNAL_WAIT;
 
     /* check errno of thread */
     if (tid->error == -RT_ETIMEOUT)
     {
         tid->error = RT_EOK;
-        rt_hw_interrupt_enable(level);
+        rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 
         /* timer timeout */
         ret = -RT_ETIMEOUT;
@@ -428,7 +435,7 @@ __done:
      }
 
 __done_int:
-    rt_hw_interrupt_enable(level);
+    rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 
 __done_return:
     return ret;
@@ -441,11 +448,11 @@ void rt_thread_handle_sig(rt_bool_t clean_state)
     rt_thread_t tid = rt_thread_self();
     struct siginfo_node *si_node;
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
     if (tid->sig_pending & tid->sig_mask)
     {
         /* if thread is not waiting for signal */
-        if (!(tid->stat & RT_THREAD_STAT_SIGNAL_WAIT))
+        if (!(RT_SCHED_CTX(tid).stat & RT_THREAD_STAT_SIGNAL_WAIT))
         {
             while (tid->sig_pending & tid->sig_mask)
             {
@@ -464,12 +471,12 @@ void rt_thread_handle_sig(rt_bool_t clean_state)
                 signo   = si_node->si.si_signo;
                 handler = tid->sig_vectors[signo];
                 tid->sig_pending &= ~sig_mask(signo);
-                rt_hw_interrupt_enable(level);
+                rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 
                 LOG_D("handle signal: %d, handler 0x%08x", signo, handler);
                 if (handler) handler(signo);
 
-                level = rt_hw_interrupt_disable();
+                level = rt_spin_lock_irqsave(&_thread_signal_lock);
                 error = -RT_EINTR;
 
                 rt_mp_free(si_node); /* release this siginfo node */
@@ -480,7 +487,7 @@ void rt_thread_handle_sig(rt_bool_t clean_state)
             /* whether clean signal status */
             if (clean_state == RT_TRUE)
             {
-                tid->stat &= ~RT_THREAD_STAT_SIGNAL;
+                RT_SCHED_CTX(tid).stat &= ~RT_THREAD_STAT_SIGNAL;
             }
             else
             {
@@ -488,12 +495,13 @@ void rt_thread_handle_sig(rt_bool_t clean_state)
             }
         }
     }
-    rt_hw_interrupt_enable(level);
+    rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 }
 
 void rt_thread_alloc_sig(rt_thread_t tid)
 {
     int index;
+    rt_bool_t need_free = RT_FALSE;
     rt_base_t level;
     rt_sighandler_t *vectors;
 
@@ -505,9 +513,23 @@ void rt_thread_alloc_sig(rt_thread_t tid)
         vectors[index] = _signal_default_handler;
     }
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
+
+    if (tid->sig_vectors == RT_NULL)
+    {
         tid->sig_vectors = vectors;
-    rt_hw_interrupt_enable(level);
+    }
+    else
+    {
+        need_free = RT_TRUE;
+    }
+
+    rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
+
+    if (need_free)
+    {
+        rt_free(vectors);
+    }
 }
 
 void rt_thread_free_sig(rt_thread_t tid)
@@ -516,13 +538,13 @@ void rt_thread_free_sig(rt_thread_t tid)
     struct siginfo_node *si_node;
     rt_sighandler_t *sig_vectors;
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
     si_node = (struct siginfo_node *)tid->si_list;
     tid->si_list = RT_NULL;
 
     sig_vectors = tid->sig_vectors;
     tid->sig_vectors = RT_NULL;
-    rt_hw_interrupt_enable(level);
+    rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 
     if (si_node)
     {
@@ -570,7 +592,7 @@ int rt_thread_kill(rt_thread_t tid, int sig)
     si.si_code  = SI_USER;
     si.si_value.sival_ptr = RT_NULL;
 
-    level = rt_hw_interrupt_disable();
+    level = rt_spin_lock_irqsave(&_thread_signal_lock);
     if (tid->sig_pending & sig_mask(sig))
     {
         /* whether already emits this signal? */
@@ -590,12 +612,12 @@ int rt_thread_kill(rt_thread_t tid, int sig)
             if (entry->si.si_signo == sig)
             {
                 memcpy(&(entry->si), &si, sizeof(siginfo_t));
-                rt_hw_interrupt_enable(level);
+                rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
                 return 0;
             }
         }
     }
-    rt_hw_interrupt_enable(level);
+    rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
 
     si_node = (struct siginfo_node *) rt_mp_alloc(_siginfo_pool, 0);
     if (si_node)
@@ -603,7 +625,7 @@ int rt_thread_kill(rt_thread_t tid, int sig)
         rt_slist_init(&(si_node->list));
         memcpy(&(si_node->si), &si, sizeof(siginfo_t));
 
-        level = rt_hw_interrupt_disable();
+        level = rt_spin_lock_irqsave(&_thread_signal_lock);
 
         if (tid->si_list)
         {
@@ -620,7 +642,7 @@ int rt_thread_kill(rt_thread_t tid, int sig)
         /* a new signal */
         tid->sig_pending |= sig_mask(sig);
 
-        rt_hw_interrupt_enable(level);
+        rt_spin_unlock_irqrestore(&_thread_signal_lock, level);
     }
     else
     {

src/thread.c

@@ -79,31 +79,30 @@ RT_OBJECT_HOOKLIST_DEFINE(rt_thread_inited);
 static void _thread_exit(void)
 {
     struct rt_thread *thread;
-    rt_base_t level;
+    rt_sched_lock_level_t slvl;
+    rt_base_t critical_level;
 
     /* get current thread */
     thread = rt_thread_self();
 
-    rt_enter_critical();
+    critical_level = rt_enter_critical();
+    rt_sched_lock(&slvl);
 
     /* remove from schedule */
-    rt_schedule_remove_thread(thread);
+    rt_sched_remove_thread(thread);
-
-    level = rt_spin_lock_irqsave(&(thread->spinlock));
 
     /* remove it from timer list */
     rt_timer_detach(&thread->thread_timer);
 
     /* change stat */
-    thread->stat = RT_THREAD_CLOSE;
+    rt_sched_thread_close(thread);
 
-    rt_spin_unlock_irqrestore(&(thread->spinlock), level);
+    rt_sched_unlock(slvl);
 
     /* insert to defunct thread list */
     rt_thread_defunct_enqueue(thread);
 
-    LOG_D("line:%d thread:%s exit\n", __LINE__, rt_thread_self()->parent.name);
+    rt_exit_critical_safe(critical_level);
-    rt_exit_critical();
 
     /* switch to next task */
     rt_schedule();
@@ -118,41 +117,66 @@ static void _thread_exit(void)
 static void _thread_timeout(void *parameter)
 {
     struct rt_thread *thread;
-    rt_base_t level;
+    rt_sched_lock_level_t slvl;
 
     thread = (struct rt_thread *)parameter;
 
     /* parameter check */
     RT_ASSERT(thread != RT_NULL);
-    RT_ASSERT((thread->stat & RT_THREAD_SUSPEND_MASK) == RT_THREAD_SUSPEND_MASK);
     RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
-    level = rt_spin_lock_irqsave(&(thread->spinlock));
+
+    rt_sched_lock(&slvl);
+
+    /**
+     * resume of the thread and stop of the thread timer should be an atomic
+     * operation. So we don't expected that thread had resumed.
+     */
+    RT_ASSERT(rt_sched_thread_is_suspended(thread));
+
     /* set error number */
     thread->error = -RT_ETIMEOUT;
 
     /* remove from suspend list */
-    rt_list_remove(&(thread->tlist));
+    rt_list_remove(&RT_THREAD_LIST_NODE(thread));
-    rt_spin_unlock_irqrestore(&(thread->spinlock), level);
     /* insert to schedule ready list */
-    rt_schedule_insert_thread(thread);
+    rt_sched_insert_thread(thread);
-    /* do schedule */
+    /* do schedule and release the scheduler lock */
-    rt_schedule();
+    rt_sched_unlock_n_resched(slvl);
 }
 
-/* release the mutex held by a thread when thread is reclaimed */
 #ifdef RT_USING_MUTEX
-static void _free_owned_mutex(rt_thread_t thread)
+static void _thread_detach_from_mutex(rt_thread_t thread)
 {
     rt_list_t *node;
     rt_list_t *tmp_list;
     struct rt_mutex *mutex;
+    rt_base_t level;
 
+    level = rt_spin_lock_irqsave(&thread->spinlock);
+
+    /* check if thread is waiting on a mutex */
+    if ((thread->pending_object) &&
+        (rt_object_get_type(thread->pending_object) == RT_Object_Class_Mutex))
+    {
+        /* remove it from its waiting list */
+        struct rt_mutex *mutex = (struct rt_mutex*)thread->pending_object;
+        rt_mutex_drop_thread(mutex, thread);
+        thread->pending_object = RT_NULL;
+    }
+
+    /* free taken mutex after detaching from waiting, so we don't lost mutex just got */
     rt_list_for_each_safe(node, tmp_list, &(thread->taken_object_list))
     {
         mutex = rt_list_entry(node, struct rt_mutex, taken_list);
         rt_mutex_release(mutex);
     }
+
+    rt_spin_unlock_irqrestore(&thread->spinlock, level);
 }
+
+#else
+
+static void _thread_detach_from_mutex(rt_thread_t thread) {}
 #endif
 
 static rt_err_t _thread_init(struct rt_thread *thread,
@@ -166,16 +190,14 @@ static rt_err_t _thread_init(struct rt_thread *thread,
 {
     RT_UNUSED(name);
 
-    /* init thread list */
+    rt_sched_thread_init_ctx(thread, tick, priority);
-    rt_list_init(&(thread->tlist));
-    rt_list_init(&(thread->tlist_schedule));
 
 #ifdef RT_USING_MEM_PROTECTION
     thread->mem_regions = RT_NULL;
 #endif
 
 #ifdef RT_USING_SMART
-    thread->wakeup.func = RT_NULL;
+    thread->wakeup_handle.func = RT_NULL;
 #endif
 
     thread->entry = (void *)entry;
@@ -200,13 +222,6 @@ static rt_err_t _thread_init(struct rt_thread *thread,
                                           (void *)_thread_exit);
 #endif /* ARCH_CPU_STACK_GROWS_UPWARD */
 
-    /* priority init */
-    RT_ASSERT(priority < RT_THREAD_PRIORITY_MAX);
-    thread->init_priority    = priority;
-    thread->current_priority = priority;
-
-    thread->number_mask = 0;
-
 #ifdef RT_USING_MUTEX
     rt_list_init(&thread->taken_object_list);
     thread->pending_object = RT_NULL;
@@ -217,28 +232,13 @@ static rt_err_t _thread_init(struct rt_thread *thread,
     thread->event_info = 0;
 #endif /* RT_USING_EVENT */
 
-#if RT_THREAD_PRIORITY_MAX > 32
-    thread->number = 0;
-    thread->high_mask = 0;
-#endif /* RT_THREAD_PRIORITY_MAX > 32 */
-
-    /* tick init */
-    rt_atomic_store(&thread->init_tick, tick);
-    rt_atomic_store(&thread->remaining_tick, tick);
-
     /* error and flags */
     thread->error = RT_EOK;
-    thread->stat  = RT_THREAD_INIT;
-
-#ifdef RT_USING_SMP
-    /* not bind on any cpu */
-    thread->bind_cpu = RT_CPUS_NR;
-    thread->oncpu = RT_CPU_DETACHED;
 
     /* lock init */
+#ifdef RT_USING_SMP
     rt_atomic_store(&thread->cpus_lock_nest, 0);
-    rt_atomic_store(&thread->critical_lock_nest, 0);
+#endif
-#endif /* RT_USING_SMP */
 
     /* initialize cleanup function and user data */
     thread->cleanup   = 0;
@@ -250,7 +250,7 @@ static rt_err_t _thread_init(struct rt_thread *thread,
                   _thread_timeout,
                   thread,
                   0,
-                  RT_TIMER_FLAG_ONE_SHOT);
+                  RT_TIMER_FLAG_ONE_SHOT | RT_TIMER_FLAG_THREAD_TIMER);
 
     /* initialize signal */
 #ifdef RT_USING_SIGNALS
@@ -268,6 +268,7 @@ static rt_err_t _thread_init(struct rt_thread *thread,
     thread->tid_ref_count = 0;
     thread->lwp = RT_NULL;
     thread->susp_recycler = RT_NULL;
+    thread->robust_list = RT_NULL;
     rt_list_init(&(thread->sibling));
 
     /* lwp thread-signal init */
@@ -392,34 +393,24 @@ rt_err_t rt_thread_startup(rt_thread_t thread)
 {
     /* parameter check */
     RT_ASSERT(thread != RT_NULL);
-    RT_ASSERT((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_INIT);
+    RT_ASSERT((RT_SCHED_CTX(thread).stat & RT_THREAD_STAT_MASK) == RT_THREAD_INIT);
     RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
 
-    /* calculate priority attribute */
-#if RT_THREAD_PRIORITY_MAX > 32
-    thread->number      = thread->current_priority >> 3;            /* 5bit */
-    thread->number_mask = 1L << thread->number;
-    thread->high_mask   = 1L << (thread->current_priority & 0x07);  /* 3bit */
-#else
-    thread->number_mask = 1L << thread->current_priority;
-#endif /* RT_THREAD_PRIORITY_MAX > 32 */
-
     LOG_D("startup a thread:%s with priority:%d",
           thread->parent.name, thread->current_priority);
-    /* change thread stat */
+
-    thread->stat = RT_THREAD_SUSPEND;
+    /* calculate priority attribute and reset thread stat to suspend */
-    /* then resume it */
+    rt_sched_thread_startup(thread);
+
+    /* resume and do a schedule if scheduler is available */
     rt_thread_resume(thread);
-    if (rt_thread_self() != RT_NULL)
-    {
-        /* do a scheduling */
-        rt_schedule();
-    }
 
     return RT_EOK;
 }
 RTM_EXPORT(rt_thread_startup);
 
+static rt_err_t _thread_detach(rt_thread_t thread);
+
 /**
  * @brief   This function will detach a thread. The thread object will be removed from
  *          thread queue and detached/deleted from the system object management.
@@ -431,52 +422,68 @@ RTM_EXPORT(rt_thread_startup);
  */
 rt_err_t rt_thread_detach(rt_thread_t thread)
 {
-    rt_base_t level;
-
     /* parameter check */
     RT_ASSERT(thread != RT_NULL);
     RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
     RT_ASSERT(rt_object_is_systemobject((rt_object_t)thread));
 
-    if ((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_CLOSE)
+    return _thread_detach(thread);
-        return RT_EOK;
+}
+RTM_EXPORT(rt_thread_detach);
 
-    rt_enter_critical();
+static rt_err_t _thread_detach(rt_thread_t thread)
+{
+    rt_err_t error;
+    rt_sched_lock_level_t slvl;
+    rt_uint8_t thread_status;
+    rt_base_t critical_level;
 
-    if ((thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_INIT)
+    /**
+     * forbid scheduling on current core before returning since current thread
+     * may be detached from scheduler.
+     */
+    critical_level = rt_enter_critical();
+
+    /* before checking status of scheduler */
+    rt_sched_lock(&slvl);
+
+    /* check if thread is already closed */
+    thread_status = rt_sched_thread_get_stat(thread);
+    if (thread_status != RT_THREAD_CLOSE)
+    {
+        if (thread_status != RT_THREAD_INIT)
         {
             /* remove from schedule */
-        rt_schedule_remove_thread(thread);
+            rt_sched_remove_thread(thread);
         }
 
-    /* disable interrupt */
-    level = rt_spin_lock_irqsave(&(thread->spinlock));
-
         /* release thread timer */
         rt_timer_detach(&(thread->thread_timer));
 
         /* change stat */
-    thread->stat = RT_THREAD_CLOSE;
+        rt_sched_thread_close(thread);
 
-#ifdef RT_USING_MUTEX
+        /* scheduler works are done */
-    _free_owned_mutex(thread);
+        rt_sched_unlock(slvl);
-    if ((thread->pending_object) &&
+
-        (rt_object_get_type(thread->pending_object) == RT_Object_Class_Mutex))
+        _thread_detach_from_mutex(thread);
-    {
-        struct rt_mutex *mutex = (struct rt_mutex*)thread->pending_object;
-        rt_mutex_drop_thread(mutex, thread);
-        thread->pending_object = RT_NULL;
-    }
-#endif
-    rt_spin_unlock_irqrestore(&(thread->spinlock), level);
 
         /* insert to defunct thread list */
         rt_thread_defunct_enqueue(thread);
 
-    rt_exit_critical();
+        error = RT_EOK;
-    return RT_EOK;
+    }
+    else
+    {
+        rt_sched_unlock(slvl);
+
+        /* already closed */
+        error = RT_EOK;
+    }
+
+    rt_exit_critical_safe(critical_level);
+    return error;
 }
-RTM_EXPORT(rt_thread_detach);
 
 #ifdef RT_USING_HEAP
 /**
@@ -546,47 +553,12 @@ RTM_EXPORT(rt_thread_create);
  */
 rt_err_t rt_thread_delete(rt_thread_t thread)
 {
-    rt_base_t level;
-
     /* parameter check */
     RT_ASSERT(thread != RT_NULL);
     RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
     RT_ASSERT(rt_object_is_systemobject((rt_object_t)thread) == RT_FALSE);
 
-    if ((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_CLOSE)
+    return _thread_detach(thread);
-        return RT_EOK;
-
-    rt_enter_critical();
-
-    if ((thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_INIT)
-    {
-        /* remove from schedule */
-        rt_schedule_remove_thread(thread);
-    }
-    level = rt_spin_lock_irqsave(&(thread->spinlock));
-
-    /* release thread timer */
-    rt_timer_detach(&(thread->thread_timer));
-
-    /* change stat */
-    thread->stat = RT_THREAD_CLOSE;
-
-#ifdef RT_USING_MUTEX
-    _free_owned_mutex(thread);
-    if ((thread->pending_object) &&
-        (rt_object_get_type(thread->pending_object) == RT_Object_Class_Mutex))
-    {
-        struct rt_mutex *mutex = (struct rt_mutex*)thread->pending_object;
-        rt_mutex_drop_thread(mutex, thread);
-        thread->pending_object = RT_NULL;
-    }
-#endif
-    rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-    /* insert to defunct thread list */
-    rt_thread_defunct_enqueue(thread);
-
-    rt_exit_critical();
-    return RT_EOK;
 }
 RTM_EXPORT(rt_thread_delete);
 #endif /* RT_USING_HEAP */
@@ -601,15 +573,12 @@ RTM_EXPORT(rt_thread_delete);
  */
 rt_err_t rt_thread_yield(void)
 {
-    struct rt_thread *thread;
+    rt_sched_lock_level_t slvl;
-    rt_base_t level;
+    rt_sched_lock(&slvl);
 
-    thread = rt_thread_self();
+    rt_sched_thread_yield(rt_thread_self());
-    level = rt_spin_lock_irqsave(&(thread->spinlock));
+
-    rt_atomic_store(&thread->remaining_tick, thread->init_tick);
+    rt_sched_unlock_n_resched(slvl);
-    thread->stat |= RT_THREAD_STAT_YIELD;
-    rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-    rt_schedule();
 
     return RT_EOK;
 }
@@ -626,8 +595,8 @@ RTM_EXPORT(rt_thread_yield);
  */
 static rt_err_t _thread_sleep(rt_tick_t tick)
 {
-    rt_base_t level;
     struct rt_thread *thread;
+    rt_base_t critical_level;
     int err;
 
     if (tick == 0)
@@ -642,37 +611,37 @@ static rt_err_t _thread_sleep(rt_tick_t tick)
 
     /* current context checking */
     RT_DEBUG_SCHEDULER_AVAILABLE(RT_TRUE);
+
     /* reset thread error */
     thread->error = RT_EOK;
-    level = rt_hw_local_irq_disable();
+
+    /* lock scheduler since current thread may be suspended */
+    critical_level = rt_enter_critical();
+
     /* suspend thread */
-    rt_enter_critical();
     err = rt_thread_suspend_with_flag(thread, RT_INTERRUPTIBLE);
-    rt_spin_lock(&(thread->spinlock));
+
     /* reset the timeout of thread timer and start it */
     if (err == RT_EOK)
     {
         rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME, &tick);
         rt_timer_start(&(thread->thread_timer));
 
-        /* enable interrupt */
-        rt_spin_unlock(&(thread->spinlock));
-        rt_hw_local_irq_enable(level);
-        rt_exit_critical();
-
         thread->error = -RT_EINTR;
 
+        /* notify a pending rescheduling */
         rt_schedule();
 
+        /* exit critical and do a rescheduling */
+        rt_exit_critical_safe(critical_level);
+
         /* clear error number of this thread to RT_EOK */
         if (thread->error == -RT_ETIMEOUT)
             thread->error = RT_EOK;
     }
     else
     {
-        rt_spin_unlock(&(thread->spinlock));
+        rt_exit_critical_safe(critical_level);
-        rt_hw_local_irq_enable(level);
-        rt_exit_critical();
     }
 
     return err;
@@ -704,9 +673,9 @@ RTM_EXPORT(rt_thread_delay);
  */
 rt_err_t rt_thread_delay_until(rt_tick_t *tick, rt_tick_t inc_tick)
 {
-    rt_base_t level;
     struct rt_thread *thread;
     rt_tick_t cur_tick;
+    rt_base_t critical_level;
 
     RT_ASSERT(tick != RT_NULL);
 
@@ -719,7 +688,7 @@ rt_err_t rt_thread_delay_until(rt_tick_t *tick, rt_tick_t inc_tick)
     thread->error = RT_EOK;
 
     /* disable interrupt */
-    level = rt_hw_local_irq_disable();
+    critical_level = rt_enter_critical();
 
     cur_tick = rt_tick_get();
     if (cur_tick - *tick < inc_tick)
@@ -729,19 +698,14 @@ rt_err_t rt_thread_delay_until(rt_tick_t *tick, rt_tick_t inc_tick)
         *tick += inc_tick;
         left_tick = *tick - cur_tick;
 
-        rt_enter_critical();
         /* suspend thread */
         rt_thread_suspend_with_flag(thread, RT_UNINTERRUPTIBLE);
 
-        rt_spin_lock(&(thread->spinlock));
-
         /* reset the timeout of thread timer and start it */
         rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME, &left_tick);
         rt_timer_start(&(thread->thread_timer));
 
-        rt_spin_unlock(&(thread->spinlock));
+        rt_exit_critical_safe(critical_level);
-        rt_hw_local_irq_enable(level);
-        rt_exit_critical();
 
         rt_schedule();
 
@@ -754,7 +718,7 @@ rt_err_t rt_thread_delay_until(rt_tick_t *tick, rt_tick_t inc_tick)
     else
     {
         *tick = cur_tick;
-        rt_hw_local_irq_enable(level);
+        rt_exit_critical_safe(critical_level);
     }
 
     return thread->error;
@@ -780,65 +744,6 @@ rt_err_t rt_thread_mdelay(rt_int32_t ms)
 RTM_EXPORT(rt_thread_mdelay);
 
 #ifdef RT_USING_SMP
-static void rt_thread_cpu_bind(rt_thread_t thread, int cpu)
-{
-    rt_base_t level;
-
-    if (cpu >= RT_CPUS_NR)
-    {
-        cpu = RT_CPUS_NR;
-    }
-
-    if ((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_READY)
-    {
-        /* unbind */
-        /* remove from old ready queue */
-        rt_schedule_remove_thread(thread);
-        /* change thread bind cpu */
-        thread->bind_cpu = cpu;
-        /* add to new ready queue */
-        rt_schedule_insert_thread(thread);
-        if (rt_thread_self() != RT_NULL)
-        {
-            rt_schedule();
-        }
-    }
-    else
-    {
-        level = rt_spin_lock_irqsave(&(thread->spinlock));
-        thread->bind_cpu = cpu;
-        if ((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_RUNNING)
-        {
-            /* thread is running on a cpu */
-            int current_cpu = rt_hw_cpu_id();
-
-            if (cpu != RT_CPUS_NR)
-            {
-                if (thread->oncpu == current_cpu)
-                {
-                    /* current thread on current cpu */
-                    if (cpu != current_cpu)
-                    {
-                        /* bind to other cpu */
-                        rt_hw_ipi_send(RT_SCHEDULE_IPI, 1U << cpu);
-                        /* self cpu need reschedule */
-                        rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-                        rt_schedule();
-                        level = rt_spin_lock_irqsave(&(thread->spinlock));
-                    }
-                    /* else do nothing */
-                }
-                else
-                {
-                    /* no running on self cpu, but dest cpu can be itself */
-                    rt_hw_ipi_send(RT_SCHEDULE_IPI, 1U << thread->oncpu);
-                }
-            }
-            /* else do nothing */
-        }
-        rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-    }
-}
 #endif
 
 /**
@@ -863,8 +768,6 @@ static void rt_thread_cpu_bind(rt_thread_t thread, int cpu)
  */
 rt_err_t rt_thread_control(rt_thread_t thread, int cmd, void *arg)
 {
-    rt_base_t level;
-
     /* parameter check */
     RT_ASSERT(thread != RT_NULL);
     RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
@@ -873,44 +776,12 @@ rt_err_t rt_thread_control(rt_thread_t thread, int cmd, void *arg)
     {
         case RT_THREAD_CTRL_CHANGE_PRIORITY:
         {
-            /* for ready thread, change queue */
+            rt_err_t error;
-            if ((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_READY)
+            rt_sched_lock_level_t slvl;
-            {
+            rt_sched_lock(&slvl);
-                /* remove thread from schedule queue first */
+            error = rt_sched_thread_change_priority(thread, *(rt_uint8_t *)arg);
-                rt_schedule_remove_thread(thread);
+            rt_sched_unlock(slvl);
-                level = rt_spin_lock_irqsave(&(thread->spinlock));
+            return error;
-                /* change thread priority */
-                thread->current_priority = *(rt_uint8_t *)arg;
-
-                /* recalculate priority attribute */
-    #if RT_THREAD_PRIORITY_MAX > 32
-                thread->number      = thread->current_priority >> 3;            /* 5bit */
-                thread->number_mask = 1 << thread->number;
-                thread->high_mask   = 1 << (thread->current_priority & 0x07);   /* 3bit */
-    #else
-                thread->number_mask = 1 << thread->current_priority;
-    #endif /* RT_THREAD_PRIORITY_MAX > 32 */
-                thread->stat  = RT_THREAD_INIT;
-                rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-                /* insert thread to schedule queue again */
-                rt_schedule_insert_thread(thread);
-            }
-            else
-            {
-                level = rt_spin_lock_irqsave(&(thread->spinlock));
-                thread->current_priority = *(rt_uint8_t *)arg;
-
-                /* recalculate priority attribute */
-    #if RT_THREAD_PRIORITY_MAX > 32
-                thread->number      = thread->current_priority >> 3;            /* 5bit */
-                thread->number_mask = 1 << thread->number;
-                thread->high_mask   = 1 << (thread->current_priority & 0x07);   /* 3bit */
-    #else
-                thread->number_mask = 1 << thread->current_priority;
-    #endif /* RT_THREAD_PRIORITY_MAX > 32 */
-                rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-            }
-            break;
         }
 
         case RT_THREAD_CTRL_STARTUP:
@@ -936,16 +807,14 @@ rt_err_t rt_thread_control(rt_thread_t thread, int cmd, void *arg)
             return rt_err;
         }
 
-    #ifdef RT_USING_SMP
         case RT_THREAD_CTRL_BIND_CPU:
         {
             rt_uint8_t cpu;
 
             cpu = (rt_uint8_t)(size_t)arg;
-            rt_thread_cpu_bind(thread, cpu);
+            return rt_sched_thread_bind_cpu(thread, cpu);
-            break;
         }
-#endif /*RT_USING_SMP*/
+
     default:
         break;
     }
@@ -958,7 +827,7 @@ RTM_EXPORT(rt_thread_control);
 #include <lwp_signal.h>
 #endif
 
-static void rt_thread_set_suspend_state(struct rt_thread *thread, int suspend_flag)
+static void _thread_set_suspend_state(struct rt_thread *thread, int suspend_flag)
 {
     rt_uint8_t stat = RT_THREAD_SUSPEND_UNINTERRUPTIBLE;
 
@@ -978,9 +847,110 @@ static void rt_thread_set_suspend_state(struct rt_thread *thread, int suspend_fl
         RT_ASSERT(0);
         break;
     }
-    thread->stat = stat | (thread->stat & ~RT_THREAD_STAT_MASK);
+    RT_SCHED_CTX(thread).stat = stat | (RT_SCHED_CTX(thread).stat & ~RT_THREAD_STAT_MASK);
 }
 
+/**
+ * @brief   This function will suspend the specified thread and change it to suspend state.
+ *
+ * @note    This function ONLY can suspend current thread itself.
+ *              rt_thread_suspend(rt_thread_self());
+ *
+ *          Do not use the rt_thread_suspend to suspend other threads. You have no way of knowing what code a
+ *          thread is executing when you suspend it. If you suspend a thread while sharing a resouce with
+ *          other threads and occupying this resouce, starvation can occur very easily.
+ *
+ * @param   thread the thread to be suspended.
+ * @param   susp_list the list thread enqueued to. RT_NULL if no list.
+ * @param   ipc_flags is a flag for the thread object to be suspended. It determines how the thread is suspended.
+ *          The flag can be ONE of the following values:
+ *              RT_IPC_FLAG_PRIO          The pending threads will queue in order of priority.
+ *              RT_IPC_FLAG_FIFO          The pending threads will queue in the first-in-first-out method
+ *                                         (also known as first-come-first-served (FCFS) scheduling strategy).
+ *          NOTE: RT_IPC_FLAG_FIFO is a non-real-time scheduling mode. It is strongly recommended to use
+ *          RT_IPC_FLAG_PRIO to ensure the thread is real-time UNLESS your applications concern about
+ *          the first-in-first-out principle, and you clearly understand that all threads involved in
+ *          this semaphore will become non-real-time threads.
+ * @param   suspend_flag status flag of the thread to be suspended.
+ *
+ * @return  Return the operation status. If the return value is RT_EOK, the function is successfully executed.
+ *          If the return value is any other values, it means this operation failed.
+ */
+rt_err_t rt_thread_suspend_to_list(rt_thread_t thread, rt_list_t *susp_list, int ipc_flags, int suspend_flag)
+{
+    rt_base_t stat;
+    rt_sched_lock_level_t slvl;
+
+    /* parameter check */
+    RT_ASSERT(thread != RT_NULL);
+    RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
+    RT_ASSERT(thread == rt_thread_self());
+
+    LOG_D("thread suspend:  %s", thread->parent.name);
+
+    rt_sched_lock(&slvl);
+
+    stat = rt_sched_thread_get_stat(thread);
+    if ((stat != RT_THREAD_READY) && (stat != RT_THREAD_RUNNING))
+    {
+        LOG_D("thread suspend: thread disorder, 0x%2x", thread->stat);
+        rt_sched_unlock(slvl);
+        return -RT_ERROR;
+    }
+
+    if (stat == RT_THREAD_RUNNING)
+    {
+        /* not suspend running status thread on other core */
+        RT_ASSERT(thread == rt_thread_self());
+    }
+
+#ifdef RT_USING_SMART
+    rt_sched_unlock(slvl);
+
+    /* check pending signals for thread before suspend */
+    if (lwp_thread_signal_suspend_check(thread, suspend_flag) == 0)
+    {
+        /* not to suspend */
+        return -RT_EINTR;
+    }
+
+    rt_sched_lock(&slvl);
+    if (stat == RT_THREAD_READY)
+    {
+        stat = rt_sched_thread_get_stat(thread);
+
+        if (stat != RT_THREAD_READY)
+        {
+            /* status updated while we check for signal */
+            rt_sched_unlock(slvl);
+            return -RT_ERROR;
+        }
+    }
+#endif
+
+    /* change thread stat */
+    rt_sched_remove_thread(thread);
+    _thread_set_suspend_state(thread, suspend_flag);
+
+    if (susp_list)
+    {
+        /**
+         * enqueue thread on the push list before leaving critical region of
+         * scheduler, so we won't miss notification of async events.
+         */
+        rt_susp_list_enqueue(susp_list, thread, ipc_flags);
+    }
+
+    /* stop thread timer anyway */
+    rt_sched_thread_timer_stop(thread);
+
+    rt_sched_unlock(slvl);
+
+    RT_OBJECT_HOOK_CALL(rt_thread_suspend_hook, (thread));
+    return RT_EOK;
+}
+RTM_EXPORT(rt_thread_suspend_to_list);
+
 /**
  * @brief   This function will suspend the specified thread and change it to suspend state.
  *
@@ -999,52 +969,7 @@ static void rt_thread_set_suspend_state(struct rt_thread *thread, int suspend_fl
  */
 rt_err_t rt_thread_suspend_with_flag(rt_thread_t thread, int suspend_flag)
 {
-    rt_base_t stat;
+    return rt_thread_suspend_to_list(thread, RT_NULL, 0, suspend_flag);
-    rt_base_t level;
-
-    /* parameter check */
-    RT_ASSERT(thread != RT_NULL);
-    RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
-    RT_ASSERT(thread == rt_thread_self());
-
-    LOG_D("thread suspend:  %s", thread->parent.name);
-
-    level = rt_spin_lock_irqsave(&(thread->spinlock));
-
-    stat = thread->stat & RT_THREAD_STAT_MASK;
-    if ((stat != RT_THREAD_READY) && (stat != RT_THREAD_RUNNING))
-    {
-        LOG_D("thread suspend: thread disorder, 0x%2x", thread->stat);
-        rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-        return -RT_ERROR;
-    }
-
-    if (stat == RT_THREAD_RUNNING)
-    {
-        /* not suspend running status thread on other core */
-        RT_ASSERT(thread == rt_thread_self());
-    }
-#ifdef RT_USING_SMART
-    if (lwp_thread_signal_suspend_check(thread, suspend_flag) == 0)
-    {
-        /* not to suspend */
-        rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-        return -RT_EINTR;
-    }
-#endif
-
-    rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-    rt_schedule_remove_thread(thread);
-    level = rt_spin_lock_irqsave(&(thread->spinlock));
-
-    rt_thread_set_suspend_state(thread, suspend_flag);
-
-    /* stop thread timer anyway */
-    rt_timer_stop(&(thread->thread_timer));
-    rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-
-    RT_OBJECT_HOOK_CALL(rt_thread_suspend_hook, (thread));
-    return RT_EOK;
 }
 RTM_EXPORT(rt_thread_suspend_with_flag);
 
@@ -1064,7 +989,8 @@ RTM_EXPORT(rt_thread_suspend);
  */
 rt_err_t rt_thread_resume(rt_thread_t thread)
 {
-    rt_base_t level;
+    rt_sched_lock_level_t slvl;
+    rt_err_t error;
 
     /* parameter check */
     RT_ASSERT(thread != RT_NULL);
@@ -1072,33 +998,22 @@ rt_err_t rt_thread_resume(rt_thread_t thread)
 
     LOG_D("thread resume: %s", thread->parent.name);
 
-    level = rt_spin_lock_irqsave(&(thread->spinlock)); //TODO need lock for cpu
+    rt_sched_lock(&slvl);
 
-    if ((thread->stat & RT_THREAD_SUSPEND_MASK) != RT_THREAD_SUSPEND_MASK)
+    error = rt_sched_thread_ready(thread);
+
+    if (!error)
     {
-        rt_spin_unlock_irqrestore(&(thread->spinlock), level);
+        error = rt_sched_unlock_n_resched(slvl);
-
+    }
-        LOG_D("thread resume: thread disorder, %d",
+    else
-              thread->stat);
+    {
-
+        rt_sched_unlock(slvl);
-        return -RT_ERROR;
     }
 
-    /* remove from suspend list */
-    rt_list_remove(&(thread->tlist));
-
-    rt_timer_stop(&thread->thread_timer);
-
-#ifdef RT_USING_SMART
-    thread->wakeup.func = RT_NULL;
-#endif
-
-    rt_spin_unlock_irqrestore(&(thread->spinlock), level);
-    /* insert to schedule ready list */
-    rt_schedule_insert_thread(thread);
-
     RT_OBJECT_HOOK_CALL(rt_thread_resume_hook, (thread));
-    return RT_EOK;
+
+    return error;
 }
 RTM_EXPORT(rt_thread_resume);
 
@@ -1112,19 +1027,21 @@ RTM_EXPORT(rt_thread_resume);
  */
 rt_err_t rt_thread_wakeup(rt_thread_t thread)
 {
-    register rt_base_t temp;
+    rt_sched_lock_level_t slvl;
     rt_err_t ret;
     rt_wakeup_func_t func = RT_NULL;
 
     RT_ASSERT(thread != RT_NULL);
     RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
-    temp = rt_spin_lock_irqsave(&(thread->spinlock));
+
-    func = thread->wakeup.func;
+    rt_sched_lock(&slvl);
-    thread->wakeup.func = RT_NULL;
+    func = thread->wakeup_handle.func;
-    rt_spin_unlock_irqrestore(&(thread->spinlock), temp);
+    thread->wakeup_handle.func = RT_NULL;
+    rt_sched_unlock(slvl);
+
     if (func)
     {
-        ret = func(thread->wakeup.user_data, thread);
+        ret = func(thread->wakeup_handle.user_data, thread);
     }
     else
     {
@@ -1136,15 +1053,15 @@ RTM_EXPORT(rt_thread_wakeup);
 
 void rt_thread_wakeup_set(struct rt_thread *thread, rt_wakeup_func_t func, void* user_data)
 {
-    register rt_base_t temp;
+    rt_sched_lock_level_t slvl;
 
     RT_ASSERT(thread != RT_NULL);
     RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
 
-    temp = rt_spin_lock_irqsave(&(thread->spinlock));
+    rt_sched_lock(&slvl);
-    thread->wakeup.func = func;
+    thread->wakeup_handle.func = func;
-    thread->wakeup.user_data = user_data;
+    thread->wakeup_handle.user_data = user_data;
-    rt_spin_unlock_irqrestore(&(thread->spinlock), temp);
+    rt_sched_unlock(slvl);
 }
 RTM_EXPORT(rt_thread_wakeup_set);
 #endif

src/timer.c

@@ -20,6 +20,7 @@
  * 2022-01-07     Gabriel      Moving __on_rt_xxxxx_hook to timer.c
  * 2022-04-19     Stanley      Correct descriptions
  * 2023-09-15     xqyjlj       perf rt_hw_interrupt_disable/enable
+ * 2024-01-25     Shell        add RT_TIMER_FLAG_THREAD_TIMER for timer to sync with sched
  */
 
 #include <rtthread.h>
@@ -31,7 +32,7 @@
 
 /* hard timer list */
 static rt_list_t _timer_list[RT_TIMER_SKIP_LIST_LEVEL];
-static struct rt_spinlock _hard_spinlock;
+static struct rt_spinlock _htimer_lock;
 
 #ifdef RT_USING_TIMER_SOFT
 
@@ -50,7 +51,7 @@ static struct rt_spinlock _hard_spinlock;
 static rt_uint8_t _soft_timer_status = RT_SOFT_TIMER_IDLE;
 /* soft timer list */
 static rt_list_t _soft_timer_list[RT_TIMER_SKIP_LIST_LEVEL];
-static struct rt_spinlock _soft_spinlock;
+static struct rt_spinlock _stimer_lock;
 static struct rt_thread _timer_thread;
 static struct rt_semaphore _soft_timer_sem;
 rt_align(RT_ALIGN_SIZE)
@@ -94,6 +95,35 @@ void rt_timer_exit_sethook(void (*hook)(struct rt_timer *timer))
 /**@}*/
 #endif /* RT_USING_HOOK */
 
+rt_inline struct rt_spinlock* _timerlock_idx(struct rt_timer *timer)
+{
+#ifdef RT_USING_TIMER_SOFT
+    if (timer->parent.flag & RT_TIMER_FLAG_SOFT_TIMER)
+    {
+        return &_stimer_lock;
+    }
+    else
+#endif /* RT_USING_TIMER_SOFT */
+    {
+        return &_htimer_lock;
+    }
+}
+
+rt_inline rt_list_t* _timerhead_idx(struct rt_timer *timer)
+{
+#ifdef RT_USING_TIMER_SOFT
+    if (timer->parent.flag & RT_TIMER_FLAG_SOFT_TIMER)
+    {
+        /* insert timer to soft timer list */
+        return _soft_timer_list;
+    }
+    else
+#endif /* RT_USING_TIMER_SOFT */
+    {
+        /* insert timer to system timer list */
+        return _timer_list;
+    }
+}
 
 /**
  * @brief [internal] The init funtion of timer
@@ -280,17 +310,7 @@ rt_err_t rt_timer_detach(rt_timer_t timer)
     RT_ASSERT(rt_object_get_type(&timer->parent) == RT_Object_Class_Timer);
     RT_ASSERT(rt_object_is_systemobject(&timer->parent));
 
-#ifdef RT_USING_TIMER_SOFT
+    spinlock = _timerlock_idx(timer);
-    if (timer->parent.flag & RT_TIMER_FLAG_SOFT_TIMER)
-    {
-        spinlock = &_soft_spinlock;
-    }
-    else
-#endif /* RT_USING_TIMER_SOFT */
-    {
-        spinlock = &_hard_spinlock;
-    }
-
     level = rt_spin_lock_irqsave(spinlock);
 
     _timer_remove(timer);
@@ -325,6 +345,7 @@ RTM_EXPORT(rt_timer_detach);
  *
  *          RT_TIMER_FLAG_HARD_TIMER        Hardware timer
  *          RT_TIMER_FLAG_SOFT_TIMER        Software timer
+ *          RT_TIMER_FLAG_THREAD_TIMER      Thread timer
  *
  *        NOTE:
  *        You can use multiple values with "|" logical operator.  By default, system will use the RT_TIME_FLAG_HARD_TIMER.
@@ -373,16 +394,7 @@ rt_err_t rt_timer_delete(rt_timer_t timer)
     RT_ASSERT(rt_object_get_type(&timer->parent) == RT_Object_Class_Timer);
     RT_ASSERT(rt_object_is_systemobject(&timer->parent) == RT_FALSE);
 
-#ifdef RT_USING_TIMER_SOFT
+    spinlock = _timerlock_idx(timer);
-    if (timer->parent.flag & RT_TIMER_FLAG_SOFT_TIMER)
-    {
-        spinlock = &_soft_spinlock;
-    }
-    else
-#endif /* RT_USING_TIMER_SOFT */
-    {
-        spinlock = &_hard_spinlock;
-    }
 
     level = rt_spin_lock_irqsave(spinlock);
 
@@ -485,6 +497,8 @@ static rt_err_t _timer_start(rt_list_t *timer_list, rt_timer_t timer)
  */
 rt_err_t rt_timer_start(rt_timer_t timer)
 {
+    rt_sched_lock_level_t slvl;
+    int is_thread_timer = 0;
     struct rt_spinlock *spinlock;
     rt_list_t *timer_list;
     rt_base_t level;
@@ -498,13 +512,24 @@ rt_err_t rt_timer_start(rt_timer_t timer)
     if (timer->parent.flag & RT_TIMER_FLAG_SOFT_TIMER)
     {
         timer_list = _soft_timer_list;
-        spinlock = &_soft_spinlock;
+        spinlock = &_stimer_lock;
     }
     else
 #endif /* RT_USING_TIMER_SOFT */
     {
         timer_list = _timer_list;
-        spinlock = &_hard_spinlock;
+        spinlock = &_htimer_lock;
+    }
+
+    if (timer->parent.flag & RT_TIMER_FLAG_THREAD_TIMER)
+    {
+        rt_thread_t thread;
+        is_thread_timer = 1;
+        rt_sched_lock(&slvl);
+
+        thread = rt_container_of(timer, struct rt_thread, thread_timer);
+        RT_ASSERT(rt_object_get_type(&thread->parent) == RT_Object_Class_Thread);
+        rt_sched_thread_timer_start(thread);
     }
 
     level = rt_spin_lock_irqsave(spinlock);
@@ -512,17 +537,19 @@ rt_err_t rt_timer_start(rt_timer_t timer)
     err = _timer_start(timer_list, timer);
 
 #ifdef RT_USING_TIMER_SOFT
-    if (err == RT_EOK)
+    if (err == RT_EOK && (timer->parent.flag & RT_TIMER_FLAG_SOFT_TIMER))
-    {
-        if (timer->parent.flag & RT_TIMER_FLAG_SOFT_TIMER)
     {
         rt_sem_release(&_soft_timer_sem);
     }
-    }
 #endif /* RT_USING_TIMER_SOFT */
 
     rt_spin_unlock_irqrestore(spinlock, level);
 
+    if (is_thread_timer)
+    {
+        rt_sched_unlock(slvl);
+    }
+
     return err;
 }
 RTM_EXPORT(rt_timer_start);
@@ -543,16 +570,8 @@ rt_err_t rt_timer_stop(rt_timer_t timer)
     RT_ASSERT(timer != RT_NULL);
     RT_ASSERT(rt_object_get_type(&timer->parent) == RT_Object_Class_Timer);
 
-#ifdef RT_USING_TIMER_SOFT
+    spinlock = _timerlock_idx(timer);
-    if (timer->parent.flag & RT_TIMER_FLAG_SOFT_TIMER)
+
-    {
-        spinlock = &_soft_spinlock;
-    }
-    else
-#endif /* RT_USING_TIMER_SOFT */
-    {
-        spinlock = &_hard_spinlock;
-    }
     level = rt_spin_lock_irqsave(spinlock);
 
     if (!(timer->parent.flag & RT_TIMER_FLAG_ACTIVATED))
@@ -565,6 +584,7 @@ rt_err_t rt_timer_stop(rt_timer_t timer)
     _timer_remove(timer);
     /* change status */
     timer->parent.flag &= ~RT_TIMER_FLAG_ACTIVATED;
+
     rt_spin_unlock_irqrestore(spinlock, level);
 
     return RT_EOK;
@@ -582,10 +602,16 @@ RTM_EXPORT(rt_timer_stop);
  */
 rt_err_t rt_timer_control(rt_timer_t timer, int cmd, void *arg)
 {
+    struct rt_spinlock *spinlock;
+    rt_base_t level;
+
     /* parameter check */
     RT_ASSERT(timer != RT_NULL);
     RT_ASSERT(rt_object_get_type(&timer->parent) == RT_Object_Class_Timer);
 
+    spinlock = _timerlock_idx(timer);
+
+    level = rt_spin_lock_irqsave(spinlock);
     switch (cmd)
     {
     case RT_TIMER_CTRL_GET_TIME:
@@ -640,6 +666,7 @@ rt_err_t rt_timer_control(rt_timer_t timer, int cmd, void *arg)
     default:
         break;
     }
+    rt_spin_unlock_irqrestore(spinlock, level);
 
     return RT_EOK;
 }
@@ -660,21 +687,23 @@ void rt_timer_check(void)
 
     RT_ASSERT(rt_interrupt_get_nest() > 0);
 
+    LOG_D("timer check enter");
+
+    level = rt_spin_lock_irqsave(&_htimer_lock);
+
+    current_tick = rt_tick_get();
+
 #ifdef RT_USING_SMP
+    /* Running on core 0 only */
     if (rt_hw_cpu_id() != 0)
     {
+        rt_spin_unlock_irqrestore(&_htimer_lock, level);
         return;
     }
 #endif
 
     rt_list_init(&list);
 
-    LOG_D("timer check enter");
-
-    current_tick = rt_tick_get();
-
-    level = rt_spin_lock_irqsave(&_hard_spinlock);
-
     while (!rt_list_isempty(&_timer_list[RT_TIMER_SKIP_LIST_LEVEL - 1]))
     {
         t = rt_list_entry(_timer_list[RT_TIMER_SKIP_LIST_LEVEL - 1].next,
@@ -696,7 +725,7 @@ void rt_timer_check(void)
             }
             /* add timer to temporary list  */
             rt_list_insert_after(&list, &(t->row[RT_TIMER_SKIP_LIST_LEVEL - 1]));
-            rt_spin_unlock_irqrestore(&_hard_spinlock, level);
+            rt_spin_unlock_irqrestore(&_htimer_lock, level);
             /* call timeout function */
             t->timeout_func(t->parameter);
 
@@ -705,7 +734,7 @@ void rt_timer_check(void)
 
             RT_OBJECT_HOOK_CALL(rt_timer_exit_hook, (t));
             LOG_D("current tick: %d", current_tick);
-            level = rt_spin_lock_irqsave(&_hard_spinlock);
+            level = rt_spin_lock_irqsave(&_htimer_lock);
             /* Check whether the timer object is detached or started again */
             if (rt_list_isempty(&list))
             {
@@ -722,7 +751,7 @@ void rt_timer_check(void)
         }
         else break;
     }
-    rt_spin_unlock_irqrestore(&_hard_spinlock, level);
+    rt_spin_unlock_irqrestore(&_htimer_lock, level);
     LOG_D("timer check leave");
 }
 
@@ -736,9 +765,9 @@ rt_tick_t rt_timer_next_timeout_tick(void)
     rt_base_t level;
     rt_tick_t next_timeout = RT_TICK_MAX;
 
-    level = rt_spin_lock_irqsave(&_hard_spinlock);
+    level = rt_spin_lock_irqsave(&_htimer_lock);
     _timer_list_next_timeout(_timer_list, &next_timeout);
-    rt_spin_unlock_irqrestore(&_hard_spinlock, level);
+    rt_spin_unlock_irqrestore(&_htimer_lock, level);
 
     return next_timeout;
 }
@@ -757,7 +786,7 @@ static void _soft_timer_check(void)
 
     rt_list_init(&list);
     LOG_D("software timer check enter");
-    level = rt_spin_lock_irqsave(&_soft_spinlock);
+    level = rt_spin_lock_irqsave(&_stimer_lock);
 
     while (!rt_list_isempty(&_soft_timer_list[RT_TIMER_SKIP_LIST_LEVEL - 1]))
     {
@@ -785,7 +814,7 @@ static void _soft_timer_check(void)
 
             _soft_timer_status = RT_SOFT_TIMER_BUSY;
 
-            rt_spin_unlock_irqrestore(&_soft_spinlock, level);
+            rt_spin_unlock_irqrestore(&_stimer_lock, level);
 
             /* call timeout function */
             t->timeout_func(t->parameter);
@@ -793,7 +822,7 @@ static void _soft_timer_check(void)
             RT_OBJECT_HOOK_CALL(rt_timer_exit_hook, (t));
             LOG_D("current tick: %d", current_tick);
 
-            level = rt_spin_lock_irqsave(&_soft_spinlock);
+            level = rt_spin_lock_irqsave(&_stimer_lock);
 
             _soft_timer_status = RT_SOFT_TIMER_IDLE;
             /* Check whether the timer object is detached or started again */
@@ -813,7 +842,7 @@ static void _soft_timer_check(void)
         else break; /* not check anymore */
     }
 
-    rt_spin_unlock_irqrestore(&_soft_spinlock, level);
+    rt_spin_unlock_irqrestore(&_stimer_lock, level);
 
     LOG_D("software timer check leave");
 }
@@ -836,9 +865,9 @@ static void _timer_thread_entry(void *parameter)
     while (1)
     {
         /* get the next timeout tick */
-        level = rt_spin_lock_irqsave(&_soft_spinlock);
+        level = rt_spin_lock_irqsave(&_stimer_lock);
         ret = _timer_list_next_timeout(_soft_timer_list, &next_timeout);
-        rt_spin_unlock_irqrestore(&_soft_spinlock, level);
+        rt_spin_unlock_irqrestore(&_stimer_lock, level);
 
         if (ret != RT_EOK)
         {
@@ -878,7 +907,7 @@ void rt_system_timer_init(void)
     {
         rt_list_init(_timer_list + i);
     }
-    rt_spin_lock_init(&_hard_spinlock);
+    rt_spin_lock_init(&_htimer_lock);
 }
 
 /**
@@ -897,7 +926,7 @@ void rt_system_timer_thread_init(void)
     {
         rt_list_init(_soft_timer_list + i);
     }
-    rt_spin_lock_init(&_soft_spinlock);
+    rt_spin_lock_init(&_stimer_lock);
     rt_sem_init(&_soft_timer_sem, "stimer", 0, RT_IPC_FLAG_PRIO);
     /* start software timer thread */
     rt_thread_init(&_timer_thread,