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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 ALSO
       pthread_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)