1 /*
2 * pthread_rwlockattr_init.c
3 *
4 * Description:
5 * This translation unit implements read/write lock primitives.
6 *
7 * --------------------------------------------------------------------------
8 *
9 * Pthreads-embedded (PTE) - POSIX Threads Library for embedded systems
10 * Copyright(C) 2008 Jason Schmidlapp
11 *
12 * Contact Email: jschmidlapp@users.sourceforge.net
13 *
14 *
15 * Based upon Pthreads-win32 - POSIX Threads Library for Win32
16 * Copyright(C) 1998 John E. Bossom
17 * Copyright(C) 1999,2005 Pthreads-win32 contributors
18 *
19 * Contact Email: rpj@callisto.canberra.edu.au
20 *
21 * The original list of contributors to the Pthreads-win32 project
22 * is contained in the file CONTRIBUTORS.ptw32 included with the
23 * source code distribution. The list can also be seen at the
24 * following World Wide Web location:
25 * http://sources.redhat.com/pthreads-win32/contributors.html
26 *
27 * This library is free software; you can redistribute it and/or
28 * modify it under the terms of the GNU Lesser General Public
29 * License as published by the Free Software Foundation; either
30 * version 2 of the License, or (at your option) any later version.
31 *
32 * This library is distributed in the hope that it will be useful,
33 * but WITHOUT ANY WARRANTY; without even the implied warranty of
34 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
35 * Lesser General Public License for more details.
36 *
37 * You should have received a copy of the GNU Lesser General Public
38 * License along with this library in the file COPYING.LIB;
39 * if not, write to the Free Software Foundation, Inc.,
40 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
41 */
42
43 #include <stdlib.h>
44 #include <errno.h>
45 #include <limits.h>
46
47 #include "pthread.h"
48 #include "implement.h"
49
50 int
pthread_rwlockattr_init(pthread_rwlockattr_t * attr)51 pthread_rwlockattr_init (pthread_rwlockattr_t * attr)
52 /*
53 * ------------------------------------------------------
54 * DOCPUBLIC
55 * Initializes a rwlock attributes object with default
56 * attributes.
57 *
58 * PARAMETERS
59 * attr
60 * pointer to an instance of pthread_rwlockattr_t
61 *
62 *
63 * DESCRIPTION
64 * Initializes a rwlock attributes object with default
65 * attributes.
66 *
67 * RESULTS
68 * 0 successfully initialized attr,
69 * ENOMEM insufficient memory for attr.
70 *
71 * ------------------------------------------------------
72 */
73 {
74 int result = 0;
75 pthread_rwlockattr_t rwa;
76
77 rwa = (pthread_rwlockattr_t) calloc (1, sizeof (*rwa));
78
79 if (rwa == NULL)
80 {
81 result = ENOMEM;
82 }
83 else
84 {
85 rwa->pshared = PTHREAD_PROCESS_PRIVATE;
86 }
87
88 *attr = rwa;
89
90 return (result);
91 } /* pthread_rwlockattr_init */
92