PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

SEM_DESTROY(3P)           POSIX Programmer's Manual          SEM_DESTROY(3P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior), or
       the interface may not be implemented on Linux.

NAME         top

       sem_destroy — destroy an unnamed semaphore

SYNOPSIS         top

       #include <semaphore.h>

       int sem_destroy(sem_t *sem);

DESCRIPTION         top

       The sem_destroy() function shall destroy the unnamed semaphore
       indicated by sem.  Only a semaphore that was created using sem_init()
       may be destroyed using sem_destroy(); the effect of calling
       sem_destroy() with a named semaphore is undefined. The effect of
       subsequent use of the semaphore sem is undefined until sem is
       reinitialized by another call to sem_init().

       It is safe to destroy an initialized semaphore upon which no threads
       are currently blocked. The effect of destroying a semaphore upon
       which other threads are currently blocked is undefined.

RETURN VALUE         top

       Upon successful completion, a value of zero shall be returned.
       Otherwise, a value of −1 shall be returned and errno set to indicate
       the error.

ERRORS         top

       The sem_destroy() function may fail if:

       EINVAL The sem argument is not a valid semaphore.

       EBUSY  There are currently processes blocked on the semaphore.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       semctl(3p), semget(3p), semop(3p), sem_init(3p), sem_open(3p)

       The Base Definitions volume of POSIX.1‐2008, semaphore.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) In the event of any discrepancy between this version and
       the original IEEE and The Open Group Standard, the original IEEE and
       The Open Group Standard is the referee document. The original
       Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                 2013                     SEM_DESTROY(3P)