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



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

NAME
       pthread_barrierattr_destroy,  pthread_barrierattr_init  -  destroy and initialize the barrier attributes object (ADVANCED
       REALTIME THREADS)

SYNOPSIS
       #include <pthread.h>

       int pthread_barrierattr_destroy(pthread_barrierattr_t *attr);
       int pthread_barrierattr_init(pthread_barrierattr_t *attr);


DESCRIPTION
       The pthread_barrierattr_destroy() function shall destroy a barrier attributes object. A destroyed attr attributes  object
       can  be reinitialized using pthread_barrierattr_init(); the results of otherwise referencing the object after it has been
       destroyed are undefined. An implementation may cause pthread_barrierattr_destroy() to set the object referenced  by  attr
       to an invalid value.

       The  pthread_barrierattr_init() function shall initialize a barrier attributes object attr with the default value for all
       of the attributes defined by the implementation.

       Results are undefined if pthread_barrierattr_init() is called specifying an already initialized attr attributes object.

       After a barrier attributes object has been used to initialize one or more barriers, any function affecting the attributes
       object (including destruction) shall not affect any previously initialized barrier.

RETURN VALUE
       If  successful,  the pthread_barrierattr_destroy() and pthread_barrierattr_init() functions shall return zero; otherwise,
       an error number shall be returned to indicate the error.

ERRORS
       The pthread_barrierattr_destroy() function may fail if:

       EINVAL The value specified by attr is invalid.


       The pthread_barrierattr_init() function shall fail if:

       ENOMEM Insufficient memory exists to initialize the barrier attributes object.


       These functions shall not return an error code of [EINTR].

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       The pthread_barrierattr_destroy() and pthread_barrierattr_init() functions are part of the Barriers option and  need  not
       be provided on all implementations.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       pthread_barrierattr_getpshared(),  pthread_barrierattr_setpshared(), the Base Definitions volume of IEEE Std 1003.1-2001,
       <pthread.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, Copy-
       right (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   original   Standard   can   be   obtained   online   at   http://www.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                               PTHREAD_BARRIERATTR_DESTROY(3P)