sem_destroy(3) - NetBSD Manual Pages

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SEM_DESTROY(3)          NetBSD 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 9.4                     January 22, 2003                     NetBSD 9.4