sem_destroy(3p) — Linux manual page

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.1‐2017, semaphore.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  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.opengroup.org/unix/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               2017                   SEM_DESTROY(3P)

Pages that refer to this page: semaphore.h(0p),  semctl(3p),  semget(3p),  sem_init(3p),  semop(3p)

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