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PTHREAD_RWLOCKATTR_DESTROY(POSIX Programmer's ManPTHREAD_RWLOCKATTR_DESTROY(P)

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.

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_destroy() function may fail if:

       EINVAL The value specified by attr is invalid.

       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
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       pthread_rwlock_destroy()	    ,	  pthread_rwlockattr_getpshared()    ,
       pthread_rwlockattr_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 .

IEEE/The Open Group		     2003	 PTHREAD_RWLOCKATTR_DESTROY(P)
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