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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
35 */
36
37 #include <limits.h>
38
39 #include "pthread.h"
40 #include "implement.h"
41
42 int
pthread_rwlockattr_destroy(pthread_rwlockattr_t * attr)43 pthread_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