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SEM_DESTROY(3)		 BSD 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.

BSD			       January 22, 2003				   BSD

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