"PTHREAD_BARRIERATTR_DESTROY"(P) manual page

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POSIX Threads for Windows – REFERENCE - Pthreads-w32

Reference Index

Table of Contents

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. +

Pthreads-w32 defines _POSIX_BARRIERS to indicate +that these routines are implemented and may be used.

Rationale

None. +

Future Directions

None. +

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 original Standard +can be obtained online at http://www.opengroup.org/unix/online.html +. +

Modified by Ross Johnson for use with Pthreads-w32.

Table of Contents

Name +
+
Synopsis +
+
Description +
+
Return + Value +
+
Errors +
+
Examples +
+
Application + Usage +
+
Rationale +
+
Future + Directions +
+
See + Also +
+
Copyright +
+

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