SEM_DESTROY(3) BSD Programmer's Manual SEM_DESTROY(3)
sem_destroy - destroy an unnamed semaphore
#include <semaphore.h>
int
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").
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.
MirOS BSD #10-current February 15, 2000 1
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