PTHREAD_BARRIERATTR_DESTROY(P3O)SIX Programmer's ManPuTaHlREAD_BARRIERATTR_DESTROY(3)



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

NAME
       pthread_barrierattr_destroy, pthread_barrierattr_init -- destroy and
       initialize the barrier attributes object

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.

       If pthread__barrierattr__init() is called specifying an already
       initialized attr attributes object, the results are undefined.

       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.

       The behavior is undefined if the value specified by the attr argument
       to pthread__barrierattr__destroy() does not refer to an initialized
       barrier attributes object.

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__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
       None.

RATIONALE
       If an implementation detects that the value specified by the attr
       argument to pthread__barrierattr__destroy() does not refer to an
       initialized barrier attributes object, it is recommended that the
       function should fail and report an [EINVAL] error.

FUTURE DIRECTIONS
       None.

SEE ALSO
       pthread__barrierattr__getpshared()

       The Base Definitions volume of POSIX.1-2017, <pthread.h>

COPYRIGHT
       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       PTHREAD_BARRIERATTR_DESTROY(3)
