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SEM_DESTROY(3) Library Functions Manual SEM_DESTROY(3) NAME sem_destroy -- destroy an unnamed semaphore LIBRARY POSIX Real-time Library (librt, -lrt) 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. ERRORS 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. SEE ALSO sem_init(3) STANDARDS 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. NetBSD 7.1.2 January 22, 2003 NetBSD 7.1.2