SEM_DESTROY(3) BSD Library Functions Manual SEM_DESTROY(3)NAMEsem_destroy — destroy an unnamed semaphore
Standard C Library (libc, -lc)
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(3).
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 sem_destroy() function will fail if:
[EINVAL] The sem argument points to an invalid semaphore.
[EBUSY] There are currently threads blocked on the semaphore
that sem points to.
SEE ALSOsem_init(3), sem(4)STANDARDS
The sem_destroy() function 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
return -1 and set errno to EBUSY if there are threads blocked on sem.
BSD February 15, 2000 BSD