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Merge pull request #3952 from mysterywolf/rt_sem_release 

[fix bug] #3951
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Bernard Xiong 2020-10-13 10:25:35 +08:00 committed by GitHub
parent 13044b1e29 2469335e21
commit e97ef8b418
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1 changed files with 14 additions and 2 deletions
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14
src/ipc.c
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@ -35,7 +35,9 @@
* 2018-10-02 Bernard add 64bit support for mailbox
* 2019-09-16 tyx add send wait support for message queue
* 2020-07-29 Meco Man fix thread->event_set/event_info when received an
event without pending
* event without pending
* 2020-10-11 Meco Man add semaphore values' overflow-check code
* in the function of rt_sem_release
*/
#include <rtthread.h>
@ -463,7 +465,17 @@ rt_err_t rt_sem_release(rt_sem_t sem)
need_schedule = RT_TRUE;
}
else
{
if(sem->value < 65535u)
{
sem->value ++; /* increase value */
}
else
{
rt_hw_interrupt_enable(temp); /* enable interrupt */
return -RT_EFULL; /* value overflowed */
}
}
/* enable interrupt */
rt_hw_interrupt_enable(temp);