1PTHREAD_BARRIERATTR_DESTROY(P3OPS)IX Programmer's MaPnTuHaRlEAD_BARRIERATTR_DESTROY(3P)
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PROLOG

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

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

16       #include <pthread.h>
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18       int pthread_barrierattr_destroy(pthread_barrierattr_t *attr);
19       int pthread_barrierattr_init(pthread_barrierattr_t *attr);
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DESCRIPTION

23       The  pthread_barrierattr_destroy()  function  shall  destroy  a barrier
24       attributes object. A destroyed attr attributes object can be reinitial‐
25       ized  using pthread_barrierattr_init(); the results of otherwise refer‐
26       encing the object after it has been destroyed are undefined. An  imple‐
27       mentation  may  cause  pthread_barrierattr_destroy()  to set the object
28       referenced by attr to an invalid value.
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30       The pthread_barrierattr_init()  function  shall  initialize  a  barrier
31       attributes object attr with the default value for all of the attributes
32       defined by the implementation.
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34       Results are undefined if pthread_barrierattr_init() is called  specify‐
35       ing an already initialized attr attributes object.
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37       After  a  barrier  attributes object has been used to initialize one or
38       more barriers, any function affecting the attributes object  (including
39       destruction) shall not affect any previously initialized barrier.
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RETURN VALUE

42       If  successful,  the pthread_barrierattr_destroy() and pthread_barrier‐
43       attr_init() functions shall return zero;  otherwise,  an  error  number
44       shall be returned to indicate the error.
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ERRORS

47       The pthread_barrierattr_destroy() function may fail if:
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49       EINVAL The value specified by attr is invalid.
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52       The pthread_barrierattr_init() function shall fail if:
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54       ENOMEM Insufficient  memory exists to initialize the barrier attributes
55              object.
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58       These functions shall not return an error code of [EINTR].
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60       The following sections are informative.
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EXAMPLES

63       None.
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APPLICATION USAGE

66       The pthread_barrierattr_destroy() and pthread_barrierattr_init()  func‐
67       tions  are  part of the Barriers option and need not be provided on all
68       implementations.
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RATIONALE

71       None.
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FUTURE DIRECTIONS

74       None.
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SEE ALSO

77       pthread_barrierattr_getpshared(), pthread_barrierattr_setpshared(), the
78       Base Definitions volume of IEEE Std 1003.1-2001, <pthread.h>.
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81       Portions  of  this text are reprinted and reproduced in electronic form
82       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
83       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
84       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
85       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
86       event of any discrepancy between this version and the original IEEE and
87       The  Open Group Standard, the original IEEE and The Open Group Standard
88       is the referee document. The original Standard can be  obtained  online
89       at http://www.opengroup.org/unix/online.html .
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93IEEE/The Open Group                  2003      PTHREAD_BARRIERATTR_DESTROY(3P)
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