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NetBSD 6.1.5 - man page for sem_destroy (netbsd section 3)

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 suc-
     cessful 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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