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Merge pull request #4703 from mysterywolf/mutexrevert 

revert #3647
This commit is contained in:
Bernard Xiong 2021-06-07 16:40:57 +08:00 committed by GitHub
parent 657c112a66 2b6762e859
commit 5c8625c8ef
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1 changed files with 0 additions and 42 deletions
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src/ipc.c
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@ -39,7 +39,6 @@
* 2020-10-11 Meco Man add value overflow-check code
* 2021-01-03 Meco Man implement rt_mb_urgent()
* 2021-05-30 Meco Man implement rt_mutex_trytake()
* 2021-01-20 hupu fix priority inversion bug of mutex
*/
#include <rtthread.h>
@ -194,31 +193,6 @@ rt_inline rt_err_t rt_ipc_list_resume_all(rt_list_t *list)
return RT_EOK;
}
/**
* This function will get the highest priority from the specified
* list of threads
*
* @param list of the threads
*
* @return the highest priority
*/
rt_uint8_t rt_ipc_get_highest_priority(rt_list_t *list)
{
struct rt_list_node *n;
struct rt_thread *sthread;
rt_uint8_t priority = RT_THREAD_PRIORITY_MAX - 1;
for (n = list->next; n != list; n = n->next)
{
sthread = rt_list_entry(n, struct rt_thread, tlist);
priority = priority < sthread->current_priority ?
priority :
sthread->current_priority;
}
return priority;
}
#ifdef RT_USING_SEMAPHORE
/**
* This function will initialize a semaphore and put it under control of
@ -870,7 +844,6 @@ rt_err_t rt_mutex_release(rt_mutex_t mutex)
register rt_base_t temp;
struct rt_thread *thread;
rt_bool_t need_schedule;
rt_uint8_t max_priority_in_queue = RT_THREAD_PRIORITY_MAX - 1;
/* parameter check */
RT_ASSERT(mutex != RT_NULL);
@ -932,21 +905,6 @@ rt_err_t rt_mutex_release(rt_mutex_t mutex)
mutex->owner = thread;
mutex->original_priority = thread->current_priority;
/* Priority adjustment occurs only when the following conditions
* are met simultaneously:
* 1.The type of mutex is RT_IPC_FLAG_FIFO;
* 2.The priority of the thread to be resumed is not equal to the
* highest priority in the queue;
*/
max_priority_in_queue = rt_ipc_get_highest_priority(&mutex->parent.suspend_thread);
if (mutex->parent.parent.flag == RT_IPC_FLAG_FIFO &&
thread->current_priority != max_priority_in_queue)
{
rt_thread_control(thread,
RT_THREAD_CTRL_CHANGE_PRIORITY,
&(max_priority_in_queue));
}
if(mutex->hold < RT_MUTEX_HOLD_MAX)
{
mutex->hold ++;