MirBSD manpage: sem_destroy(3)

SEM_DESTROY(3)             BSD Programmer's Manual              SEM_DESTROY(3)


     sem_destroy - destroy an unnamed semaphore


     #include <semaphore.h>

     sem_destroy(sem_t *sem);


     The sem_destroy() function destroys the unnamed semaphore pointed to by
     sem. After a successful call to sem_destroy(), sem is unusable until re-
     initialized by another call to sem_init().


     The sem_destroy() function returns the value 0 if successful; otherwise
     the value -1 is returned and the global variable errno is set to indicate
     the error.


     sem_destroy() will fail if:

     [EINVAL]      sem points to an invalid semaphore.

     [EBUSY]       There are currently threads blocked on the semaphore that
                   sem points to.


     sem_getvalue(3), sem_init(3), sem_open(3), sem_post(3), sem_wait(3)


     sem_destroy() conforms to ISO/IEC 9945-1:1996 ("POSIX.1").

     POSIX does not define the behavior of sem_destroy() if called while there
     are threads blocked on sem, but this implementation is guaranteed to re-
     turn -1 and set errno to EBUSY if there are threads blocked on sem.

MirBSD #10-current            February 15, 2000                              1

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