PTHREAD_RWLOCKATTR_DESTROY(POSIX Programmer's MaPTHREAD_RWLOCKATTR_DESTROY(3P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
NAME
pthread_rwlockattr_destroy, pthread_rwlockattr_init — destroy and ini‐
tialize the read-write lock attributes object
SYNOPSIS
#include <pthread.h>
int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);
int pthread_rwlockattr_init(pthread_rwlockattr_t *attr);
DESCRIPTION
The pthread_rwlockattr_destroy() function shall destroy a read-write
lock attributes object. A destroyed attr attributes object can be
reinitialized using pthread_rwlockattr_init(); the results of otherwise
referencing the object after it has been destroyed are undefined. An
implementation may cause pthread_rwlockattr_destroy() to set the object
referenced by attr to an invalid value.
The pthread_rwlockattr_init() function shall initialize a read-write
lock attributes object attr with the default value for all of the
attributes defined by the implementation.
Results are undefined if pthread_rwlockattr_init() is called specifying
an already initialized attr attributes object.
After a read-write lock attributes object has been used to initialize
one or more read-write locks, any function affecting the attributes
object (including destruction) shall not affect any previously initial‐
ized read-write locks.
The behavior is undefined if the value specified by the attr argument
to pthread_rwlockattr_destroy() does not refer to an initialized read-
write lock attributes object.
RETURN VALUE
If successful, the pthread_rwlockattr_destroy() and pthread_rwlock‐
attr_init() functions shall return zero; otherwise, an error number
shall be returned to indicate the error.
ERRORS
The pthread_rwlockattr_init() function shall fail if:
ENOMEM Insufficient memory exists to initialize the read-write lock
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 argu‐
ment to pthread_rwlockattr_destroy() does not refer to an initialized
read-write lock attributes object, it is recommended that the function
should fail and report an [EINVAL] error.
FUTURE DIRECTIONS
None.
SEE ALSOpthread_rwlock_destroy(), pthread_rwlockattr_getpshared()
The Base Definitions volume of POSIX.1‐2008, <pthread.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
cal and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/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.ker‐
nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 PTHREAD_RWLOCKATTR_DESTROY(3P)
