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[Kernel] Add signal implementation. 

1. Add signal implementation;
2. Change the 'rt_uint8_t' of cmd to 'int';
This commit is contained in:
bernard 2017-10-15 22:31:53 +08:00
parent cd215b2545
commit b27c7e4826
11 changed files with 479 additions and 34 deletions
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9
src/KConfig
View File

@ -39,7 +39,7 @@ config RT_USING_OVERFLOW_CHECK
config RT_DEBUG_INIT
int "Enable system initialization informat print"
default 1
default 0
help
print the procedure name of initialization
@ -100,6 +100,13 @@ config RT_USING_MESSAGEQUEUE
bool "Enable message queue"
default y
config RT_USING_SIGNALS
bool "Enable signals"
select RT_USING_MEMPOOL
default n
help
A signal is an asynchronous notification sent to a specific thread
in order to notify it of an event that occurred.
endmenu
menu "Memory Management"

14
src/clock.c
View File

@ -108,13 +108,23 @@ void rt_tick_increase(void)
* This function will calculate the tick from millisecond.
*
* @param ms the specified millisecond
* - Negative Number wait forever
* - Zero not wait
* - Max 0x7fffffff
*
* @return the calculated tick
*/
rt_tick_t rt_tick_from_millisecond(rt_uint32_t ms)
int rt_tick_from_millisecond(rt_int32_t ms)
{
int tick;
if (ms < 0)
tick = RT_WAITING_FOREVER;
else
tick = (RT_TICK_PER_SECOND * ms + 999) / 1000;
/* return the calculated tick */
return (RT_TICK_PER_SECOND * ms + 999) / 1000;
return tick;
}
RTM_EXPORT(rt_tick_from_millisecond);

5
src/components.c
View File

@ -237,6 +237,11 @@ int rtthread_startup(void)
/* scheduler system initialization */
rt_system_scheduler_init();
#ifdef RT_USING_SIGNALS
/* signal system initialization */
rt_system_signal_init();
#endif
/* create init_thread */
rt_application_init();

16
src/device.c
View File

@ -56,6 +56,11 @@ rt_err_t rt_device_register(rt_device_t dev,
dev->ref_count = 0;
dev->open_flag = 0;
#if defined(RT_USING_DFS) && defined(RT_USING_DFS_DEVFS)
dev->fops = RT_NULL;
rt_list_init(&(dev->wait_queue));
#endif
return RT_EOK;
}
RTM_EXPORT(rt_device_register);
@ -213,11 +218,16 @@ rt_err_t rt_device_open(rt_device_t dev, rt_uint16_t oflag)
{
result = dev->open(dev, oflag);
}
else
{
/* set open flag */
dev->open_flag = (oflag & RT_DEVICE_OFLAG_MASK);
}
/* set open flag */
if (result == RT_EOK || result == -RT_ENOSYS)
{
dev->open_flag = oflag | RT_DEVICE_OFLAG_OPEN;
dev->open_flag |= RT_DEVICE_OFLAG_OPEN;
dev->ref_count++;
/* don't let bad things happen silently. If you are bitten by this assert,
@ -349,7 +359,7 @@ RTM_EXPORT(rt_device_write);
*
* @return the result
*/
rt_err_t rt_device_control(rt_device_t dev, rt_uint8_t cmd, void *arg)
rt_err_t rt_device_control(rt_device_t dev, int cmd, void *arg)
{
RT_ASSERT(dev != RT_NULL);
@ -359,7 +369,7 @@ rt_err_t rt_device_control(rt_device_t dev, rt_uint8_t cmd, void *arg)
return dev->control(dev, cmd, arg);
}
return RT_EOK;
return -RT_ENOSYS;
}
RTM_EXPORT(rt_device_control);

4
src/idle.c
View File

@ -127,6 +127,10 @@ void rt_thread_idle_excute(void)
if (thread->cleanup != RT_NULL)
thread->cleanup(thread);
#ifdef RT_USING_SIGNALS
rt_thread_free_sig(thread);
#endif
/* if it's a system object, not delete it */
if (rt_object_is_systemobject((rt_object_t)thread) == RT_TRUE)
{

28
src/ipc.c
View File

@ -478,7 +478,7 @@ RTM_EXPORT(rt_sem_release);
*
* @return the error code
*/
rt_err_t rt_sem_control(rt_sem_t sem, rt_uint8_t cmd, void *arg)
rt_err_t rt_sem_control(rt_sem_t sem, int cmd, void *arg)
{
rt_ubase_t level;
RT_ASSERT(sem != RT_NULL);
@ -644,14 +644,13 @@ rt_err_t rt_mutex_take(rt_mutex_t mutex, rt_int32_t time)
register rt_base_t temp;
struct rt_thread *thread;
/* this function must not be used in interrupt even if time = 0 */
RT_DEBUG_IN_THREAD_CONTEXT;
RT_ASSERT(mutex != RT_NULL);
/* get current thread */
thread = rt_thread_self();
if (!thread) return RT_EOK; /* return directory if scheduler not started */
/* this function must not be used in interrupt even if time = 0 */
RT_DEBUG_IN_THREAD_CONTEXT;
/* disable interrupt */
temp = rt_hw_interrupt_disable();
@ -672,6 +671,7 @@ rt_err_t rt_mutex_take(rt_mutex_t mutex, rt_int32_t time)
}
else
{
__again:
/* The value of mutex is 1 in initial status. Therefore, if the
* value is great than 0, it indicates the mutex is avaible.
*/
@ -740,6 +740,9 @@ rt_err_t rt_mutex_take(rt_mutex_t mutex, rt_int32_t time)
if (thread->error != RT_EOK)
{
/* interrupt by signal, try it again */
if (thread->error == -RT_EINTR) goto __again;
/* return error */
return thread->error;
}
@ -778,13 +781,12 @@ rt_err_t rt_mutex_release(rt_mutex_t mutex)
need_schedule = RT_FALSE;
/* get current thread */
thread = rt_thread_self();
if (!thread) return RT_EOK;
/* only thread could release mutex because we need test the ownership */
RT_DEBUG_IN_THREAD_CONTEXT;
/* get current thread */
thread = rt_thread_self();
/* disable interrupt */
temp = rt_hw_interrupt_disable();
@ -870,7 +872,7 @@ RTM_EXPORT(rt_mutex_release);
*
* @return the error code
*/
rt_err_t rt_mutex_control(rt_mutex_t mutex, rt_uint8_t cmd, void *arg)
rt_err_t rt_mutex_control(rt_mutex_t mutex, int cmd, void *arg)
{
return -RT_ERROR;
}
@ -1212,7 +1214,7 @@ RTM_EXPORT(rt_event_recv);
*
* @return the error code
*/
rt_err_t rt_event_control(rt_event_t event, rt_uint8_t cmd, void *arg)
rt_err_t rt_event_control(rt_event_t event, int cmd, void *arg)
{
rt_ubase_t level;
RT_ASSERT(event != RT_NULL);
@ -1687,7 +1689,7 @@ RTM_EXPORT(rt_mb_recv);
*
* @return the error code
*/
rt_err_t rt_mb_control(rt_mailbox_t mb, rt_uint8_t cmd, void *arg)
rt_err_t rt_mb_control(rt_mailbox_t mb, int cmd, void *arg)
{
rt_ubase_t level;
RT_ASSERT(mb != RT_NULL);
@ -2235,7 +2237,7 @@ RTM_EXPORT(rt_mq_recv);
*
* @return the error code
*/
rt_err_t rt_mq_control(rt_mq_t mq, rt_uint8_t cmd, void *arg)
rt_err_t rt_mq_control(rt_mq_t mq, int cmd, void *arg)
{
rt_ubase_t level;
struct rt_mq_message *msg;

4
src/kservice.c
View File

@ -1114,6 +1114,8 @@ RTM_EXPORT(rt_hw_console_output);
*/
void rt_kputs(const char *str)
{
if (!str) return;
#ifdef RT_USING_DEVICE
if (_console_device == RT_NULL)
{
@ -1265,7 +1267,7 @@ const rt_uint8_t __lowest_bit_bitmap[] =
* @return return the index of the first bit set. If value is 0, then this function
* shall return 0.
*/
rt_ubase_t __rt_ffs(rt_ubase_t value)
int __rt_ffs(int value)
{
if (value == 0) return 0;

21
src/scheduler.c
View File

@ -42,7 +42,6 @@
static rt_int16_t rt_scheduler_lock_nest;
extern volatile rt_uint8_t rt_interrupt_nest;
extern rt_ubase_t __rt_ffs(rt_ubase_t value);
rt_list_t rt_thread_priority_table[RT_THREAD_PRIORITY_MAX];
struct rt_thread *rt_current_thread;
@ -241,8 +240,18 @@ void rt_schedule(void)
if (rt_interrupt_nest == 0)
{
extern void rt_thread_handle_sig(rt_bool_t clean_state);
rt_hw_context_switch((rt_uint32_t)&from_thread->sp,
(rt_uint32_t)&to_thread->sp);
/* enable interrupt */
rt_hw_interrupt_enable(level);
#ifdef RT_USING_SIGNALS
/* check signal status */
rt_thread_handle_sig(RT_TRUE);
#endif
}
else
{
@ -250,12 +259,16 @@ void rt_schedule(void)
rt_hw_context_switch_interrupt((rt_uint32_t)&from_thread->sp,
(rt_uint32_t)&to_thread->sp);
/* enable interrupt */
rt_hw_interrupt_enable(level);
}
}
else
{
/* enable interrupt */
rt_hw_interrupt_enable(level);
}
}
/* enable interrupt */
rt_hw_interrupt_enable(level);
}
/*

382
src/signal.c Normal file
View File

@ -0,0 +1,382 @@
/*
* File : signal.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2017/10/5 Bernard the first version
*/
#include <stdint.h>
#include <string.h>
#include <rthw.h>
#include <rtthread.h>
#ifdef RT_USING_SIGNALS
#ifndef RT_SIG_INFO_MAX
#define RT_SIG_INFO_MAX 32
#endif
// #define DBG_ENABLE
#define DBG_SECTION_NAME "[SIGN]"
#define DBG_COLOR
#define DBG_LEVEL DBG_LOG
#include <rtdbg.h>
#define sig_mask(sig_no) (1u << sig_no)
#define sig_valid(sig_no) (sig_no >= 0 && sig_no < RT_SIG_MAX)
struct siginfo_node
{
struct siginfo si;
struct rt_slist_node list;
};
static struct rt_mempool *_rt_siginfo_pool;
static void _signal_deliver(rt_thread_t tid);
void rt_thread_handle_sig(rt_bool_t clean_state);
static void _signal_default_handler(int signo)
{
dbg_log(DBG_INFO, "handled signo[%d] with default action.\n", signo);
return ;
}
static void _signal_entry(void* parameter)
{
rt_thread_t tid = rt_thread_self();
dbg_enter;
/* handle signal */
rt_thread_handle_sig(RT_FALSE);
/* never come back... */
rt_hw_interrupt_disable();
/* return to thread */
tid->sp = tid->sig_ret;
tid->sig_ret = RT_NULL;
dbg_log(DBG_LOG, "switch back to: 0x%08x\n", tid->sp);
tid->stat &= ~RT_THREAD_STAT_SIGNAL;
rt_hw_context_switch_to((rt_uint32_t)&(tid->sp));
}
static void _signal_deliver(rt_thread_t tid)
{
rt_ubase_t level;
/* thread is not interested in pended signals */
if (!(tid->sig_pending & tid->sig_mask)) return;
level = rt_hw_interrupt_disable();
if (tid->stat == RT_THREAD_SUSPEND)
{
/* resume thread to handle signal */
rt_thread_resume(tid);
/* add signal state */
tid->stat |= RT_THREAD_STAT_SIGNAL;
rt_hw_interrupt_enable(level);
/* re-schedule */
rt_schedule();
}
else
{
if (tid == rt_thread_self())
{
/* add signal state */
tid->stat |= RT_THREAD_STAT_SIGNAL;
rt_hw_interrupt_enable(level);
/* do signal action in self thread context */
rt_thread_handle_sig(RT_TRUE);
}
else if (!(tid->stat & RT_THREAD_STAT_SIGNAL))
{
tid->stat |= RT_THREAD_STAT_SIGNAL;
/* point to the signal handle entry */
tid->sig_ret = tid->sp;
tid->sp = rt_hw_stack_init((void*)_signal_entry, RT_NULL,
(void *)((char *)tid->sig_ret - 32), RT_NULL);
rt_hw_interrupt_enable(level);
dbg_log(DBG_LOG, "signal stack pointer @ 0x%08x\n", tid->sp);
/* re-schedule */
rt_schedule();
}
else
{
rt_hw_interrupt_enable(level);
}
}
}
rt_sighandler_t rt_signal_install(int signo, rt_sighandler_t handler)
{
rt_sighandler_t old;
rt_thread_t tid = rt_thread_self();
if (!sig_valid(signo)) return SIG_ERR;
rt_enter_critical();
if (tid->sig_vectors == RT_NULL)
{
rt_thread_alloc_sig(tid);
}
if (tid->sig_vectors)
{
old = tid->sig_vectors[signo];
if (handler == SIG_IGN) tid->sig_vectors[signo] = RT_NULL;
else if (handler == SIG_DFL) tid->sig_vectors[signo] = _signal_default_handler;
else tid->sig_vectors[signo] = handler;
}
rt_exit_critical();
return old;
}
void rt_signal_mask(int signo)
{
rt_base_t level;
rt_thread_t tid = rt_thread_self();
level = rt_hw_interrupt_disable();
tid->sig_mask &= ~sig_mask(signo);
rt_hw_interrupt_enable(level);
}
void rt_signal_unmask(int signo)
{
rt_base_t level;
rt_thread_t tid = rt_thread_self();
level = rt_hw_interrupt_disable();
tid->sig_mask |= sig_mask(signo);
/* let thread handle pended signals */
if (tid->sig_mask & tid->sig_pending)
{
rt_hw_interrupt_enable(level);
_signal_deliver(tid);
}
else
{
rt_hw_interrupt_enable(level);
}
}
void rt_thread_handle_sig(rt_bool_t clean_state)
{
rt_base_t level;
rt_thread_t tid = rt_thread_self();
struct siginfo_node *si_node;
level = rt_hw_interrupt_disable();
while (tid->sig_pending & tid->sig_mask)
{
int signo, error;
rt_sighandler_t handler;
si_node = (struct siginfo_node *)tid->si_list;
if (!si_node) break;
/* remove this sig info node from list */
if (si_node->list.next == RT_NULL)
tid->si_list = RT_NULL;
else
tid->si_list = (void*)rt_slist_entry(si_node->list.next, struct siginfo_node, list);
signo = si_node->si.si_signo;
handler = tid->sig_vectors[signo];
rt_hw_interrupt_enable(level);
dbg_log(DBG_LOG, "handle signal: %d, handler 0x%08x\n", signo, handler);
if (handler) handler(signo);
level = rt_hw_interrupt_disable();
tid->sig_pending &= ~sig_mask(signo);
error = si_node->si.si_errno;
rt_mp_free(si_node); /* release this siginfo node */
/* set errno in thread tcb */
tid->error = error;
}
/* whether clean signal status */
if (clean_state == RT_TRUE) tid->stat &= ~RT_THREAD_STAT_SIGNAL;
rt_hw_interrupt_enable(level);
}
void rt_thread_alloc_sig(rt_thread_t tid)
{
int index;
rt_base_t level;
rt_sighandler_t *vectors;
vectors = (rt_sighandler_t *)RT_KERNEL_MALLOC(sizeof(rt_sighandler_t) * RT_SIG_MAX);
RT_ASSERT(vectors != RT_NULL);
for (index = 0; index < RT_SIG_MAX; index ++)
{
vectors[index] = _signal_default_handler;
}
level = rt_hw_interrupt_disable();
tid->sig_vectors = vectors;
rt_hw_interrupt_enable(level);
}
void rt_thread_free_sig(rt_thread_t tid)
{
rt_base_t level;
struct siginfo_node *si_list;
rt_sighandler_t *sig_vectors;
level = rt_hw_interrupt_disable();
si_list = (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);
if (si_list)
{
struct rt_slist_node *node;
struct siginfo_node *si_node;
dbg_log(DBG_LOG, "free signal info list\n");
node = &(si_list->list);
do {
si_node = rt_slist_entry(node, struct siginfo_node, list);
rt_mp_free(si_node);
node = node->next;
} while (node);
}
if (sig_vectors)
{
RT_KERNEL_FREE(sig_vectors);
}
}
int rt_thread_kill(rt_thread_t tid, int sig)
{
siginfo_t si;
rt_base_t level;
struct siginfo_node *si_node;
RT_ASSERT(tid != RT_NULL);
if (!sig_valid(sig)) return -RT_EINVAL;
dbg_log(DBG_INFO, "send signal: %d\n", sig);
si.si_errno = RT_EINTR;
si.si_signo = sig;
si.si_code = SI_USER;
si.si_value.sival_ptr = RT_NULL;
level = rt_hw_interrupt_disable();
if (tid->sig_pending & sig_mask(sig))
{
/* whether already emits this signal? */
struct rt_slist_node *node;
struct siginfo_node *entry;
node = (struct rt_slist_node *)tid->si_list;
rt_hw_interrupt_enable(level);
/* update sig infor */
rt_enter_critical();
for (; (node) != RT_NULL; node = node->next)
{
entry = rt_slist_entry(node, struct siginfo_node, list);
if (entry->si.si_signo == sig)
{
memcpy(&(entry->si), &si, sizeof(siginfo_t));
rt_exit_critical();
return 0;
}
}
rt_exit_critical();
/* disable interrupt to protect tcb */
level = rt_hw_interrupt_disable();
}
else
{
/* a new signal */
tid->sig_pending |= sig_mask(sig);
}
rt_hw_interrupt_enable(level);
si_node = (struct siginfo_node*) rt_mp_alloc(_rt_siginfo_pool, 0);
if (si_node)
{
rt_slist_init(&(si_node->list));
memcpy(&(si_node->si), &si, sizeof(siginfo_t));
level = rt_hw_interrupt_disable();
if (!tid->si_list) tid->si_list = si_node;
else
{
struct siginfo_node *si_list;
si_list = (struct siginfo_node*)tid->si_list;
rt_slist_append(&(si_list->list), &(si_node->list));
}
rt_hw_interrupt_enable(level);
}
else
{
dbg_log(DBG_ERROR, "The allocation of signal infor node failed.\n");
}
/* deliver signal to this thread */
_signal_deliver(tid);
return RT_EOK;
}
int rt_system_signal_init(void)
{
_rt_siginfo_pool = rt_mp_create("signal", RT_SIG_INFO_MAX, sizeof(struct siginfo_node));
if (_rt_siginfo_pool == RT_NULL)
{
dbg_log(DBG_ERROR, "create memory pool for signal info failed.\n");
RT_ASSERT(0);
}
return 0;
}
#endif

28
src/thread.c
View File

@ -185,6 +185,16 @@ static rt_err_t _rt_thread_init(struct rt_thread *thread,
0,
RT_TIMER_FLAG_ONE_SHOT);
/* initialize signal */
#ifdef RT_USING_SIGNALS
thread->sig_mask = 0x00;
thread->sig_pending = 0x00;
thread->sig_ret = RT_NULL;
thread->sig_vectors = RT_NULL;
thread->si_list = RT_NULL;
#endif
RT_OBJECT_HOOK_CALL(rt_thread_inited_hook, (thread));
return RT_EOK;
@ -260,7 +270,7 @@ rt_err_t rt_thread_startup(rt_thread_t thread)
{
/* thread check */
RT_ASSERT(thread != RT_NULL);
RT_ASSERT(thread->stat == RT_THREAD_INIT);
RT_ASSERT((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_INIT);
/* set current priority to init priority */
thread->current_priority = thread->init_priority;
@ -305,7 +315,7 @@ rt_err_t rt_thread_detach(rt_thread_t thread)
/* thread check */
RT_ASSERT(thread != RT_NULL);
if (thread->stat != RT_THREAD_INIT)
if ((thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_INIT)
{
/* remove from schedule */
rt_schedule_remove_thread(thread);
@ -403,7 +413,7 @@ rt_err_t rt_thread_delete(rt_thread_t thread)
/* thread check */
RT_ASSERT(thread != RT_NULL);
if (thread->stat != RT_THREAD_INIT)
if ((thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_INIT)
{
/* remove from schedule */
rt_schedule_remove_thread(thread);
@ -448,7 +458,7 @@ rt_err_t rt_thread_yield(void)
thread = rt_current_thread;
/* if the thread stat is READY and on ready queue list */
if (thread->stat == RT_THREAD_READY &&
if ((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_READY &&
thread->tlist.next != thread->tlist.prev)
{
/* remove thread from thread list */
@ -535,7 +545,7 @@ RTM_EXPORT(rt_thread_delay);
*
* @return RT_EOK
*/
rt_err_t rt_thread_control(rt_thread_t thread, rt_uint8_t cmd, void *arg)
rt_err_t rt_thread_control(rt_thread_t thread, int cmd, void *arg)
{
register rt_base_t temp;
@ -549,7 +559,7 @@ rt_err_t rt_thread_control(rt_thread_t thread, rt_uint8_t cmd, void *arg)
temp = rt_hw_interrupt_disable();
/* for ready thread, change queue */
if (thread->stat == RT_THREAD_READY)
if ((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_READY)
{
/* remove thread from schedule queue first */
rt_schedule_remove_thread(thread);
@ -622,7 +632,7 @@ rt_err_t rt_thread_suspend(rt_thread_t thread)
RT_DEBUG_LOG(RT_DEBUG_THREAD, ("thread suspend: %s\n", thread->name));
if (thread->stat != RT_THREAD_READY)
if ((thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_READY)
{
RT_DEBUG_LOG(RT_DEBUG_THREAD, ("thread suspend: thread disorder, %d\n",
thread->stat));
@ -664,7 +674,7 @@ rt_err_t rt_thread_resume(rt_thread_t thread)
RT_DEBUG_LOG(RT_DEBUG_THREAD, ("thread resume: %s\n", thread->name));
if (thread->stat != RT_THREAD_SUSPEND)
if ((thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_SUSPEND)
{
RT_DEBUG_LOG(RT_DEBUG_THREAD, ("thread resume: thread disorder, %d\n",
thread->stat));
@ -705,7 +715,7 @@ void rt_thread_timeout(void *parameter)
/* thread check */
RT_ASSERT(thread != RT_NULL);
RT_ASSERT(thread->stat == RT_THREAD_SUSPEND);
RT_ASSERT((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_SUSPEND);
/* set error number */
thread->error = -RT_ETIMEOUT;

2
src/timer.c
View File

@ -451,7 +451,7 @@ RTM_EXPORT(rt_timer_stop);
*
* @return RT_EOK
*/
rt_err_t rt_timer_control(rt_timer_t timer, rt_uint8_t cmd, void *arg)
rt_err_t rt_timer_control(rt_timer_t timer, int cmd, void *arg)
{
/* timer check */
RT_ASSERT(timer != RT_NULL);