SEM_DESTROY(3) OpenBSD Programmer's Manual SEM_DESTROY(3)NAMEsem_destroy - destroy an unnamed semaphore
SYNOPSIS
#include <semaphore.h>
int
sem_destroy(sem_t *sem);
DESCRIPTION
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().
RETURN VALUES
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.
ERRORSsem_destroy() will fail if:
[EINVAL] sem points to an invalid semaphore.
[EBUSY] There are currently threads blocked on the semaphore that
sem points to.
SEE ALSOsem_getvalue(3), sem_init(3), sem_open(3), sem_post(3), sem_wait(3)STANDARDSsem_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
return -1 and set errno to EBUSY if there are threads blocked on sem.
OpenBSD 4.9 May 31, 2007 OpenBSD 4.9