1 /*
2 * libusb synchronization using POSIX Threads
3 *
4 * Copyright © 2010 Peter Stuge <peter@stuge.se>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef LIBUSB_THREADS_POSIX_H
22 #define LIBUSB_THREADS_POSIX_H
23
24 #include <pthread.h>
25
26 #define PTHREAD_CHECK(expression) ASSERT_EQ(expression, 0)
27
28 #define USBI_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
29 typedef pthread_mutex_t usbi_mutex_static_t;
usbi_mutex_static_lock(usbi_mutex_static_t * mutex)30 static inline void usbi_mutex_static_lock(usbi_mutex_static_t *mutex)
31 {
32 PTHREAD_CHECK(pthread_mutex_lock(mutex));
33 }
usbi_mutex_static_unlock(usbi_mutex_static_t * mutex)34 static inline void usbi_mutex_static_unlock(usbi_mutex_static_t *mutex)
35 {
36 PTHREAD_CHECK(pthread_mutex_unlock(mutex));
37 }
38
39 typedef pthread_mutex_t usbi_mutex_t;
usbi_mutex_init(usbi_mutex_t * mutex)40 static inline void usbi_mutex_init(usbi_mutex_t *mutex)
41 {
42 PTHREAD_CHECK(pthread_mutex_init(mutex, NULL));
43 }
usbi_mutex_lock(usbi_mutex_t * mutex)44 static inline void usbi_mutex_lock(usbi_mutex_t *mutex)
45 {
46 PTHREAD_CHECK(pthread_mutex_lock(mutex));
47 }
usbi_mutex_unlock(usbi_mutex_t * mutex)48 static inline void usbi_mutex_unlock(usbi_mutex_t *mutex)
49 {
50 PTHREAD_CHECK(pthread_mutex_unlock(mutex));
51 }
usbi_mutex_trylock(usbi_mutex_t * mutex)52 static inline int usbi_mutex_trylock(usbi_mutex_t *mutex)
53 {
54 return pthread_mutex_trylock(mutex) == 0;
55 }
usbi_mutex_destroy(usbi_mutex_t * mutex)56 static inline void usbi_mutex_destroy(usbi_mutex_t *mutex)
57 {
58 PTHREAD_CHECK(pthread_mutex_destroy(mutex));
59 }
60
61 typedef pthread_cond_t usbi_cond_t;
62 void usbi_cond_init(pthread_cond_t *cond);
usbi_cond_wait(usbi_cond_t * cond,usbi_mutex_t * mutex)63 static inline void usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex)
64 {
65 PTHREAD_CHECK(pthread_cond_wait(cond, mutex));
66 }
67 int usbi_cond_timedwait(usbi_cond_t *cond,
68 usbi_mutex_t *mutex, const struct timeval *tv);
usbi_cond_broadcast(usbi_cond_t * cond)69 static inline void usbi_cond_broadcast(usbi_cond_t *cond)
70 {
71 PTHREAD_CHECK(pthread_cond_broadcast(cond));
72 }
usbi_cond_destroy(usbi_cond_t * cond)73 static inline void usbi_cond_destroy(usbi_cond_t *cond)
74 {
75 PTHREAD_CHECK(pthread_cond_destroy(cond));
76 }
77
78 typedef pthread_key_t usbi_tls_key_t;
usbi_tls_key_create(usbi_tls_key_t * key)79 static inline void usbi_tls_key_create(usbi_tls_key_t *key)
80 {
81 PTHREAD_CHECK(pthread_key_create(key, NULL));
82 }
usbi_tls_key_get(usbi_tls_key_t key)83 static inline void *usbi_tls_key_get(usbi_tls_key_t key)
84 {
85 return pthread_getspecific(key);
86 }
usbi_tls_key_set(usbi_tls_key_t key,void * ptr)87 static inline void usbi_tls_key_set(usbi_tls_key_t key, void *ptr)
88 {
89 PTHREAD_CHECK(pthread_setspecific(key, ptr));
90 }
usbi_tls_key_delete(usbi_tls_key_t key)91 static inline void usbi_tls_key_delete(usbi_tls_key_t key)
92 {
93 PTHREAD_CHECK(pthread_key_delete(key));
94 }
95
96 unsigned int usbi_get_tid(void);
97
98 #endif /* LIBUSB_THREADS_POSIX_H */
99