1 /*
2 * libusb synchronization using POSIX Threads
3 *
4 * Copyright (C) 2011 Vitali Lovich <vlovich@aliph.com>
5 * Copyright (C) 2011 Peter Stuge <peter@stuge.se>
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #ifdef _XOPEN_SOURCE
23 # if _XOPEN_SOURCE < 500
24 # undef _XOPEN_SOURCE
25 # define _XOPEN_SOURCE 500
26 # endif
27 #else
28 #define _XOPEN_SOURCE 500
29 #endif /* _XOPEN_SOURCE */
30
31 #include "threads_posix.h"
32
usbi_mutex_init_recursive(pthread_mutex_t * mutex,pthread_mutexattr_t * attr)33 int usbi_mutex_init_recursive(pthread_mutex_t *mutex, pthread_mutexattr_t *attr)
34 {
35 int err;
36 pthread_mutexattr_t stack_attr;
37 if (!attr) {
38 attr = &stack_attr;
39 err = pthread_mutexattr_init(&stack_attr);
40 if (err != 0)
41 return err;
42 }
43
44 err = pthread_mutexattr_settype(attr, PTHREAD_MUTEX_RECURSIVE);
45 if (err != 0)
46 goto finish;
47
48 err = pthread_mutex_init(mutex, attr);
49
50 finish:
51 if (attr == &stack_attr)
52 pthread_mutexattr_destroy(&stack_attr);
53
54 return err;
55 }
56