|SEM_POST(2)||System Calls Manual||SEM_POST(2)|
sem_post — unlock
The semaphore referenced by sem is unlocked, the value of the semaphore is incremented, and all threads which are waiting on the semaphore are awakened.
is reentrant with respect to signals and may be called from within a signal
will return 0. Otherwise, -1 is returned and errno is
sem_post() succeeds unless:
sem_post() is specified in the POSIX
Realtime Extension (1003.1b-1993/1003.1i-1995).
|June 8, 2000||Darwin|