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Linux 2.6 - man page for sem_destroy (linux section 3posix)

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

NAME
       sem_destroy - destroy an unnamed semaphore (REALTIME)

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 subse-
       quent 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 shall fail if:

       EINVAL The sem argument is not a valid semaphore.

       The sem_destroy() function may fail if:

       EBUSY  There are currently processes blocked on the semaphore.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       The sem_destroy() function is part of the Semaphores option and need not be  available  on
       all implementations.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       semctl()  ,  semget() , semop() , sem_init() , sem_open() , the Base Definitions volume of
       IEEE Std 1003.1-2001, <semaphore.h>

COPYRIGHT
       Portions of this text are reprinted and	reproduced  in	electronic  form  from	IEEE  Std
       1003.1,	2003  Edition,	Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				   SEM_DESTROY(P)


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