oracular (3) sem_destroy.3posix.gz

Provided by: manpages-posix-dev_2017a-2_all bug

PROLOG
       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
       sem_destroy — destroy an unnamed semaphore


SYNOPSIS
       #include <semaphore.h>

       int sem_destroy(sem_t *sem);


DESCRIPTION
       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
       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
       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
       None.


APPLICATION USAGE
       None.


RATIONALE
       None.


FUTURE DIRECTIONS
       None.


SEE ALSO
       semctl(), semget(), semop(), sem_init(), sem_open()

       The Base Definitions volume of POSIX.1‐2017, <semaphore.h>


       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 .