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, 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 .