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SEM_DESTROY(3) BSD Library Functions Manual SEM_DESTROY(3)
sem_destroy -- destroy an unnamed semaphore
POSIX Real-time Library (librt, -lrt)
The sem_destroy() function destroys the unnamed semaphore pointed to by sem. After a suc-
cessful call to sem_destroy(), sem is unusable until re-initialized by another call to
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:
[EBUSY] There are currently threads blocked on the semaphore that sem points to.
[EINVAL] sem points to an invalid semaphore.
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 return -1 and set errno to EBUSY if
there are threads blocked on sem.
BSD January 22, 2003 BSD
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