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sem_destroy(3p) — Linux manual page

SEM_DESTROY(3P)         POSIX Programmer's ManualSEM_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

       Thesem_destroy() function shall destroy the unnamed semaphore       indicated bysem.  Only a semaphore that was created usingsem_init() may be destroyed usingsem_destroy(); the effect of       callingsem_destroy() with a named semaphore is undefined. The       effect of subsequent use of the semaphoresem is undefined untilsem is reinitialized by another call tosem_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 anderrno set to       indicate the error.

ERRORS        top

       Thesem_destroy() function may fail if:EINVALThesem argument is not a valid semaphore.EBUSYThere 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 athttp://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, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017SEM_DESTROY(3P)

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

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