add a blocking mailbox post function
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1471 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
mbbill@gmail.com
parent
d15319c408
commit
252bc41a2c
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@ -489,6 +489,8 @@ struct rt_mailbox
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rt_uint16_t entry; /**< index of messages in msg_pool. */
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rt_uint16_t in_offset, out_offset; /**< in/output offset of the message buffer. */
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rt_list_t suspend_sender_thread; /**< sender thread suspended on this mb */
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};
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typedef struct rt_mailbox* rt_mailbox_t;
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#endif
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195
src/ipc.c
195
src/ipc.c
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@ -71,23 +71,23 @@ rt_inline rt_err_t rt_ipc_object_init(struct rt_ipc_object *ipc)
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}
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/**
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* This function will suspend a thread for a specified IPC object and put the
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* thread into suspend queue of IPC object
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* This function will suspend a thread to a specified list. IPC object or some double-queue
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* object (mailbox etc.) contains this kind of list.
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*
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* @param ipc the IPC object
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* @param thread the thread object to be suspended
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*
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* @return the operation status, RT_EOK on successful
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*/
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rt_inline rt_err_t rt_ipc_object_suspend(struct rt_ipc_object *ipc, struct rt_thread *thread)
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rt_inline rt_err_t rt_ipc_list_suspend(rt_list_t *list, struct rt_thread *thread, rt_uint8_t flag)
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{
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/* suspend thread */
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rt_thread_suspend(thread);
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switch (ipc->parent.flag)
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switch (flag)
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{
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case RT_IPC_FLAG_FIFO:
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rt_list_insert_before(&(ipc->suspend_thread), &(thread->tlist));
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rt_list_insert_before(list, &(thread->tlist));
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break;
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case RT_IPC_FLAG_PRIO:
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@ -96,8 +96,7 @@ rt_inline rt_err_t rt_ipc_object_suspend(struct rt_ipc_object *ipc, struct rt_th
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struct rt_thread* sthread;
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/* find a suitable position */
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for (n = ipc->suspend_thread.next; n != &(ipc->suspend_thread);
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n = n->next)
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for (n = list->next; n != list; n = n->next)
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{
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sthread = rt_list_entry(n, struct rt_thread, tlist);
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@ -111,8 +110,8 @@ rt_inline rt_err_t rt_ipc_object_suspend(struct rt_ipc_object *ipc, struct rt_th
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}
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/* not found a suitable position, append to the end of suspend_thread list */
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if (n == &(ipc->suspend_thread))
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rt_list_insert_before(&(ipc->suspend_thread), &(thread->tlist));
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if (n == list)
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rt_list_insert_before(list, &(thread->tlist));
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}
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break;
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}
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@ -121,20 +120,20 @@ rt_inline rt_err_t rt_ipc_object_suspend(struct rt_ipc_object *ipc, struct rt_th
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}
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/**
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* This function will resume a thread from an IPC object:
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* This function will resume the first thread in the list of a IPC object:
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* - remove the thread from suspend queue of IPC object
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* - put the thread into system ready queue
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*
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* @param ipc the IPC object
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* @param list the thread list
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*
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* @return the operation status, RT_EOK on successful
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*/
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rt_inline rt_err_t rt_ipc_object_resume(struct rt_ipc_object* ipc)
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rt_inline rt_err_t rt_ipc_list_resume(rt_list_t *list)
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{
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struct rt_thread *thread;
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/* get thread entry */
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thread = rt_list_entry(ipc->suspend_thread.next, struct rt_thread, tlist);
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thread = rt_list_entry(list->next, struct rt_thread, tlist);
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#ifdef RT_IPC_DEBUG
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rt_kprintf("resume thread:%s\n", thread->name);
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@ -147,25 +146,26 @@ rt_inline rt_err_t rt_ipc_object_resume(struct rt_ipc_object* ipc)
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}
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/**
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* This function will resume all suspended threads in an IPC object.
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* This function will resume all suspended threads in a list, including
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* suspend list of IPC object and private list of mailbox etc.
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*
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* @param ipc the IPC object
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* @param list of the threads to resume
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*
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* @return the operation status, RT_EOK on successful
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*/
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rt_inline rt_err_t rt_ipc_object_resume_all(struct rt_ipc_object* ipc)
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rt_inline rt_err_t rt_ipc_list_resume_all(rt_list_t *list)
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{
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struct rt_thread* thread;
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register rt_ubase_t temp;
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/* wakeup all suspend threads */
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while (!rt_list_isempty(&(ipc->suspend_thread)))
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while (!rt_list_isempty(list))
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{
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/* disable interrupt */
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temp = rt_hw_interrupt_disable();
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/* get next suspend thread */
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thread = rt_list_entry(ipc->suspend_thread.next, struct rt_thread, tlist);
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thread = rt_list_entry(list->next, struct rt_thread, tlist);
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/* set error code to RT_ERROR */
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thread->error = -RT_ERROR;
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@ -229,7 +229,7 @@ rt_err_t rt_sem_detach (rt_sem_t sem)
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RT_ASSERT(sem != RT_NULL);
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/* wakeup all suspend threads */
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rt_ipc_object_resume_all(&(sem->parent));
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rt_ipc_list_resume_all(&(sem->parent.suspend_thread));
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/* detach semaphore object */
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rt_object_detach(&(sem->parent.parent));
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@ -283,7 +283,7 @@ rt_err_t rt_sem_delete (rt_sem_t sem)
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RT_ASSERT(sem != RT_NULL);
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/* wakeup all suspend threads */
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rt_ipc_object_resume_all(&(sem->parent));
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rt_ipc_list_resume_all(&(sem->parent.suspend_thread));
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/* delete semaphore object */
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rt_object_delete(&(sem->parent.parent));
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@ -315,7 +315,7 @@ rt_err_t rt_sem_take (rt_sem_t sem, rt_int32_t time)
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/* disable interrupt */
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temp = rt_hw_interrupt_disable();
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#ifdef RT_IPC_DEBUG
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#ifdef RT_IPC_DEBU
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rt_kprintf("thread %s take sem:%s, which value is: %d\n", rt_thread_self()->name,
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((struct rt_object*)sem)->name, sem->value);
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#endif
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@ -349,7 +349,8 @@ rt_err_t rt_sem_take (rt_sem_t sem, rt_int32_t time)
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#endif
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/* suspend thread */
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rt_ipc_object_suspend(&(sem->parent), thread);
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rt_ipc_list_suspend(&(sem->parent.suspend_thread),
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thread, sem->parent.parent.flag);
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/* has waiting time, start thread timer */
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if (time > 0)
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@ -424,7 +425,7 @@ rt_err_t rt_sem_release(rt_sem_t sem)
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if ( !rt_list_isempty(&sem->parent.suspend_thread) )
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{
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/* resume the suspended thread */
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rt_ipc_object_resume(&(sem->parent));
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rt_ipc_list_resume(&(sem->parent.suspend_thread));
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need_schedule = RT_TRUE;
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}
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else sem->value ++; /* increase value */
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@ -462,7 +463,7 @@ rt_err_t rt_sem_control(rt_sem_t sem, rt_uint8_t cmd, void* arg)
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level = rt_hw_interrupt_disable();
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/* resume all waiting thread */
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rt_ipc_object_resume_all(&sem->parent);
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rt_ipc_list_resume_all(&sem->parent.suspend_thread);
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/* set new value */
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sem->value = (rt_uint16_t)value;
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@ -525,7 +526,7 @@ rt_err_t rt_mutex_detach (rt_mutex_t mutex)
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RT_ASSERT(mutex != RT_NULL);
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/* wakeup all suspend threads */
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rt_ipc_object_resume_all(&(mutex->parent));
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rt_ipc_list_resume_all(&(mutex->parent.suspend_thread));
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/* detach semaphore object */
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rt_object_detach(&(mutex->parent.parent));
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@ -580,7 +581,7 @@ rt_err_t rt_mutex_delete (rt_mutex_t mutex)
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RT_ASSERT(mutex != RT_NULL);
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/* wakeup all suspend threads */
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rt_ipc_object_resume_all(&(mutex->parent));
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rt_ipc_list_resume_all(&(mutex->parent.suspend_thread));
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/* delete semaphore object */
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rt_object_delete(&(mutex->parent.parent));
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@ -671,7 +672,8 @@ rt_err_t rt_mutex_take (rt_mutex_t mutex, rt_int32_t time)
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}
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/* suspend current thread */
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rt_ipc_object_suspend(&(mutex->parent), thread);
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rt_ipc_list_suspend(&(mutex->parent.suspend_thread),
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thread, mutex->parent.parent.flag);
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/* has waiting time, start thread timer */
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if (time > 0)
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@ -784,7 +786,7 @@ rt_err_t rt_mutex_release(rt_mutex_t mutex)
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mutex->hold ++;
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/* resume thread */
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rt_ipc_object_resume(&(mutex->parent));
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rt_ipc_list_resume(&(mutex->parent.suspend_thread));
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need_schedule = RT_TRUE;
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}
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@ -868,7 +870,7 @@ rt_err_t rt_event_detach(rt_event_t event)
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RT_ASSERT(event != RT_NULL);
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/* resume all suspended thread */
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rt_ipc_object_resume_all(&(event->parent));
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rt_ipc_list_resume_all(&(event->parent.suspend_thread));
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/* detach event object */
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rt_object_detach(&(event->parent.parent));
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@ -918,7 +920,7 @@ rt_err_t rt_event_delete (rt_event_t event)
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RT_ASSERT(event != RT_NULL);
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/* resume all suspended thread */
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rt_ipc_object_resume_all(&(event->parent));
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rt_ipc_list_resume_all(&(event->parent.suspend_thread));
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/* delete event object */
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rt_object_delete(&(event->parent.parent));
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@ -1085,7 +1087,8 @@ rt_err_t rt_event_recv(rt_event_t event, rt_uint32_t set, rt_uint8_t option, rt_
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thread->event_info = option;
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/* put thread to suspended thread list */
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rt_ipc_object_suspend(&(event->parent), thread);
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rt_ipc_list_suspend(&(event->parent.suspend_thread),
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thread, event->parent.parent.flag);
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/* if there is a waiting timeout, active thread timer */
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if (timeout > 0)
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@ -1144,7 +1147,7 @@ rt_err_t rt_event_control (rt_event_t event, rt_uint8_t cmd, void* arg)
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level = rt_hw_interrupt_disable();
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/* resume all waiting thread */
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rt_ipc_object_resume_all(&event->parent);
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rt_ipc_list_resume_all(&event->parent.suspend_thread);
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/* init event set */
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event->set = 0;
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@ -1194,6 +1197,8 @@ rt_err_t rt_mb_init(rt_mailbox_t mb, const char* name, void* msgpool, rt_size_t
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mb->in_offset = 0;
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mb->out_offset = 0;
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rt_list_init(&(mb->suspend_sender_thread));
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return RT_EOK;
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}
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@ -1210,7 +1215,9 @@ rt_err_t rt_mb_detach(rt_mailbox_t mb)
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RT_ASSERT(mb != RT_NULL);
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/* resume all suspended thread */
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rt_ipc_object_resume_all(&(mb->parent));
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rt_ipc_list_resume_all(&(mb->parent.suspend_thread));
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/* also resume all mailbox private suspended thread */
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rt_ipc_list_resume_all(&(mb->suspend_sender_thread));
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/* detach mailbox object */
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rt_object_detach(&(mb->parent.parent));
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@ -1272,7 +1279,9 @@ rt_err_t rt_mb_delete (rt_mailbox_t mb)
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RT_ASSERT(mb != RT_NULL);
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/* resume all suspended thread */
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rt_ipc_object_resume_all(&(mb->parent));
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rt_ipc_list_resume_all(&(mb->parent.suspend_thread));
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/* also resume all mailbox private suspended thread */
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rt_ipc_list_resume_all(&(mb->suspend_sender_thread));
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#ifdef RT_USING_MODULE
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/* the mb object belongs to an application module */
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@ -1292,17 +1301,20 @@ rt_err_t rt_mb_delete (rt_mailbox_t mb)
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#endif
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/**
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* This function will send a mail to mailbox object, if there are threads suspended
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* on mailbox object, it will be waked up.
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* This function will send a mail to mailbox object. If the mailbox is full,
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* current thread will be suspended until timeout.
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*
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* @param mb the mailbox object
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* @param value the mail
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* @param timeout the waiting time
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*
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* @return the error code
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*/
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rt_err_t rt_mb_send (rt_mailbox_t mb, rt_uint32_t value)
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rt_err_t rt_mb_send_wait (rt_mailbox_t mb, rt_uint32_t value, rt_int32_t timeout)
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{
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struct rt_thread *thread;
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register rt_ubase_t temp;
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rt_uint32_t tick_delta;
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/* parameter check */
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RT_ASSERT(mb != RT_NULL);
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@ -1314,15 +1326,69 @@ rt_err_t rt_mb_send (rt_mailbox_t mb, rt_uint32_t value)
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/* disable interrupt */
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temp = rt_hw_interrupt_disable();
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/* get current thread */
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thread = rt_thread_self();
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/* mailbox is full */
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if (mb->entry == mb->size)
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while (mb->entry == mb->size)
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{
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/* reset error number in thread */
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thread->error = RT_EOK;
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/* no waiting, return timeout */
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if (timeout == 0)
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{
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/* enable interrupt */
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rt_hw_interrupt_enable(temp);
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thread->error = -RT_EFULL;
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return -RT_EFULL;
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}
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/* suspend current thread */
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rt_ipc_list_suspend(&(mb->suspend_sender_thread),
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thread, mb->parent.parent.flag);
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/* has waiting time, start thread timer */
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if (timeout > 0)
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{
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/* get the start tick of timer */
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tick_delta = rt_tick_get();
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#ifdef RT_IPC_DEBUG
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rt_kprintf("mb_send_wait: start timer of thread:%s\n", thread->name);
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#endif
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/* reset the timeout of thread timer and start it */
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rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME, &timeout);
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rt_timer_start(&(thread->thread_timer));
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}
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/* enable interrupt */
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rt_hw_interrupt_enable(temp);
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/* re-schedule */
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rt_schedule();
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/* resume from suspend state */
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if (thread->error != RT_EOK)
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{
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/* return error */
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return thread->error;
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}
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/* disable interrupt */
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temp = rt_hw_interrupt_disable();
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/* re-calculate timeout tick */
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if (timeout > 0)
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{
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tick_delta = rt_tick_get() - tick_delta;
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timeout -= tick_delta;
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if (timeout < 0) timeout = 0;
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}
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}
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/* set ptr */
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mb->msg_pool[mb->in_offset] = value;
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/* increase input offset */
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@ -1334,7 +1400,7 @@ rt_err_t rt_mb_send (rt_mailbox_t mb, rt_uint32_t value)
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/* resume suspended thread */
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if( !rt_list_isempty(&mb->parent.suspend_thread) )
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{
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rt_ipc_object_resume(&(mb->parent));
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rt_ipc_list_resume(&(mb->parent.suspend_thread));
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/* enable interrupt */
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rt_hw_interrupt_enable(temp);
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@ -1349,6 +1415,21 @@ rt_err_t rt_mb_send (rt_mailbox_t mb, rt_uint32_t value)
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return RT_EOK;
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}
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/**
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* This function will send a mail to mailbox object, if there are threads suspended
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* on mailbox object, it will be waked up. This function will return immediately, if
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* you want blocking send, use rt_mb_send_wait instead.
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*
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* @param mb the mailbox object
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* @param value the mail
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*
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* @return the error code
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*/
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rt_err_t rt_mb_send (rt_mailbox_t mb, rt_uint32_t value)
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{
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return rt_mb_send_wait(mb,value,0);
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}
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/**
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* This function will receive a mail from mailbox object, if there is no mail in
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* mailbox object, the thread shall wait for a specified time.
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@ -1396,7 +1477,8 @@ rt_err_t rt_mb_recv (rt_mailbox_t mb, rt_uint32_t* value, rt_int32_t timeout)
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}
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/* suspend current thread */
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rt_ipc_object_suspend(&(mb->parent), thread);
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rt_ipc_list_suspend(&(mb->parent.suspend_thread),
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thread, mb->parent.parent.flag);
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/* has waiting time, start thread timer */
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if (timeout > 0)
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@ -1446,6 +1528,22 @@ rt_err_t rt_mb_recv (rt_mailbox_t mb, rt_uint32_t* value, rt_int32_t timeout)
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/* decrease message entry */
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mb->entry --;
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/* resume suspended thread */
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if( !rt_list_isempty(&(mb->suspend_sender_thread)) )
|
||||
{
|
||||
rt_ipc_list_resume(&(mb->suspend_sender_thread));
|
||||
|
||||
/* enable interrupt */
|
||||
rt_hw_interrupt_enable(temp);
|
||||
|
||||
#ifdef RT_USING_HOOK
|
||||
if (rt_object_take_hook != RT_NULL) rt_object_take_hook(&(mb->parent.parent));
|
||||
#endif
|
||||
rt_schedule();
|
||||
|
||||
return RT_EOK;
|
||||
}
|
||||
|
||||
/* enable interrupt */
|
||||
rt_hw_interrupt_enable(temp);
|
||||
|
||||
|
|
@ -1476,7 +1574,7 @@ rt_err_t rt_mb_control(rt_mailbox_t mb, rt_uint8_t cmd, void* arg)
|
|||
level = rt_hw_interrupt_disable();
|
||||
|
||||
/* resume all waiting thread */
|
||||
rt_ipc_object_resume_all(&mb->parent);
|
||||
rt_ipc_list_resume_all(&(mb->parent.suspend_thread));
|
||||
|
||||
/* re-init mailbox */
|
||||
mb->entry = 0;
|
||||
|
|
@ -1571,7 +1669,7 @@ rt_err_t rt_mq_detach(rt_mq_t mq)
|
|||
RT_ASSERT(mq != RT_NULL);
|
||||
|
||||
/* resume all suspended thread */
|
||||
rt_ipc_object_resume_all((struct rt_ipc_object*)mq);
|
||||
rt_ipc_list_resume_all(&mq->parent.suspend_thread);
|
||||
|
||||
/* detach message queue object */
|
||||
rt_object_detach(&(mq->parent.parent));
|
||||
|
|
@ -1653,7 +1751,7 @@ rt_err_t rt_mq_delete (rt_mq_t mq)
|
|||
RT_ASSERT(mq != RT_NULL);
|
||||
|
||||
/* resume all suspended thread */
|
||||
rt_ipc_object_resume_all(&(mq->parent));
|
||||
rt_ipc_list_resume_all(&(mq->parent.suspend_thread));
|
||||
|
||||
#ifdef RT_USING_MODULE
|
||||
/* the mq object belongs to an application module */
|
||||
|
|
@ -1727,6 +1825,7 @@ rt_err_t rt_mq_send (rt_mq_t mq, void* buffer, rt_size_t size)
|
|||
((struct rt_mq_message*)mq->msg_queue_tail)->next = msg;
|
||||
}
|
||||
|
||||
|
||||
/* set new tail */
|
||||
mq->msg_queue_tail = msg;
|
||||
/* if the head is empty, set head */
|
||||
|
|
@ -1738,7 +1837,7 @@ rt_err_t rt_mq_send (rt_mq_t mq, void* buffer, rt_size_t size)
|
|||
/* resume suspended thread */
|
||||
if( !rt_list_isempty(&mq->parent.suspend_thread) )
|
||||
{
|
||||
rt_ipc_object_resume(&(mq->parent));
|
||||
rt_ipc_list_resume(&(mq->parent.suspend_thread));
|
||||
|
||||
/* enable interrupt */
|
||||
rt_hw_interrupt_enable(temp);
|
||||
|
|
@ -1814,7 +1913,7 @@ rt_err_t rt_mq_urgent(rt_mq_t mq, void* buffer, rt_size_t size)
|
|||
/* resume suspended thread */
|
||||
if( !rt_list_isempty(&mq->parent.suspend_thread) )
|
||||
{
|
||||
rt_ipc_object_resume(&(mq->parent));
|
||||
rt_ipc_list_resume(&(mq->parent.suspend_thread));
|
||||
|
||||
/* enable interrupt */
|
||||
rt_hw_interrupt_enable(temp);
|
||||
|
|
@ -1875,7 +1974,8 @@ rt_err_t rt_mq_recv (rt_mq_t mq, void* buffer, rt_size_t size, rt_int32_t timeou
|
|||
}
|
||||
|
||||
/* suspend current thread */
|
||||
rt_ipc_object_suspend(&(mq->parent), thread);
|
||||
rt_ipc_list_suspend(&(mq->parent.suspend_thread),
|
||||
thread, mq->parent.parent.flag);
|
||||
|
||||
/* has waiting time, start thread timer */
|
||||
if (timeout > 0)
|
||||
|
|
@ -1971,7 +2071,7 @@ rt_err_t rt_mq_control(rt_mq_t mq, rt_uint8_t cmd, void* arg)
|
|||
level = rt_hw_interrupt_disable();
|
||||
|
||||
/* resume all waiting thread */
|
||||
rt_ipc_object_resume_all(&mq->parent);
|
||||
rt_ipc_list_resume_all(&mq->parent.suspend_thread);
|
||||
|
||||
/* release all message in the queue */
|
||||
while (mq->msg_queue_head != RT_NULL)
|
||||
|
|
@ -2002,5 +2102,4 @@ rt_err_t rt_mq_control(rt_mq_t mq, rt_uint8_t cmd, void* arg)
|
|||
}
|
||||
|
||||
#endif /* end of RT_USING_MESSAGEQUEUE */
|
||||
|
||||
/*@}*/
|
||||
|
|
|
|||
Loading…
Reference in New Issue