What happens when thread gets the same mutex object multiple times?

[mickey2005]

IF A THREAD OWNS A MUTEX OBJECT AND IT ACQUIRES THE SAME MUTEX OBJECT MULTIPLE TIMES,THEN WHAT ARE THE RULES?

 

[Gomez]

Re: RTOS THREADS

Maybe it's different in other RTOS, but in uCOS you will get an error (ret = OS_PRIO_EXIST).

Gomez

 

[abdulsalam]

Re: RTOS THREADS

well generally thread can acquire a mutex multiple times. but it will need to release the mutex the number of times it acquired it.

 

[nzahirov]

Re: RTOS THREADS

I believe a multiple request for a mutex as abdulsalam described is usually referred to as a semaphore.

 

[abdulsalam]

Re: RTOS THREADS

for the difference between the mutex and semaphore following link may help

**broken link removed**