1/*
2 * pthread_rwlockattr_destroy.c
3 *
4 * Description:
5 * This translation unit implements read/write lock primitives.
6 *
7 * --------------------------------------------------------------------------
8 *
9 *      Pthreads-win32 - POSIX Threads Library for Win32
10 *      Copyright(C) 1998 John E. Bossom
11 *      Copyright(C) 1999,2005 Pthreads-win32 contributors
12 *
13 *      Contact Email: rpj@callisto.canberra.edu.au
14 *
15 *      The current list of contributors is contained
16 *      in the file CONTRIBUTORS included with the source
17 *      code distribution. The list can also be seen at the
18 *      following World Wide Web location:
19 *      http://sources.redhat.com/pthreads-win32/contributors.html
20 *
21 *      This library is free software; you can redistribute it and/or
22 *      modify it under the terms of the GNU Lesser General Public
23 *      License as published by the Free Software Foundation; either
24 *      version 2 of the License, or (at your option) any later version.
25 *
26 *      This library is distributed in the hope that it will be useful,
27 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
28 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
29 *      Lesser General Public License for more details.
30 *
31 *      You should have received a copy of the GNU Lesser General Public
32 *      License along with this library in the file COPYING.LIB;
33 *      if not, write to the Free Software Foundation, Inc.,
34 *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
35 */
36
37#include <limits.h>
38
39#include "pthread.h"
40#include "implement.h"
41
42int
43pthread_rwlockattr_destroy (pthread_rwlockattr_t * attr)
44     /*
45      * ------------------------------------------------------
46      * DOCPUBLIC
47      *      Destroys a rwlock attributes object. The object can
48      *      no longer be used.
49      *
50      * PARAMETERS
51      *      attr
52      *              pointer to an instance of pthread_rwlockattr_t
53      *
54      *
55      * DESCRIPTION
56      *      Destroys a rwlock attributes object. The object can
57      *      no longer be used.
58      *
59      *      NOTES:
60      *              1)      Does not affect rwlockss created using 'attr'
61      *
62      * RESULTS
63      *              0               successfully released attr,
64      *              EINVAL          'attr' is invalid.
65      *
66      * ------------------------------------------------------
67      */
68{
69  int result = 0;
70
71  if (attr == NULL || *attr == NULL)
72    {
73      result = EINVAL;
74    }
75  else
76    {
77      pthread_rwlockattr_t rwa = *attr;
78
79      *attr = NULL;
80      free (rwa);
81    }
82
83  return (result);
84}				/* pthread_rwlockattr_destroy */
85