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1 office 1 /**
2 * @file BMutex.h
3 * @author Ambroz Bizjak <ambrop7@gmail.com>
4 *
5 * @section LICENSE
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29  
30 #ifndef BADVPN_BMUTEX_H
31 #define BADVPN_BMUTEX_H
32  
33 #if !defined(BADVPN_THREAD_SAFE) || (BADVPN_THREAD_SAFE != 0 && BADVPN_THREAD_SAFE != 1)
34 #error BADVPN_THREAD_SAFE is not defined or incorrect
35 #endif
36  
37 #if BADVPN_THREAD_SAFE
38 #include <pthread.h>
39 #endif
40  
41 #include <misc/debug.h>
42 #include <base/DebugObject.h>
43  
44 typedef struct {
45 #if BADVPN_THREAD_SAFE
46 pthread_mutex_t pthread_mutex;
47 #endif
48 DebugObject d_obj;
49 } BMutex;
50  
51 static int BMutex_Init (BMutex *o) WARN_UNUSED;
52 static void BMutex_Free (BMutex *o);
53 static void BMutex_Lock (BMutex *o);
54 static void BMutex_Unlock (BMutex *o);
55  
56 static int BMutex_Init (BMutex *o)
57 {
58 #if BADVPN_THREAD_SAFE
59 if (pthread_mutex_init(&o->pthread_mutex, NULL) != 0) {
60 return 0;
61 }
62 #endif
63  
64 DebugObject_Init(&o->d_obj);
65 return 1;
66 }
67  
68 static void BMutex_Free (BMutex *o)
69 {
70 DebugObject_Free(&o->d_obj);
71  
72 #if BADVPN_THREAD_SAFE
73 int res = pthread_mutex_destroy(&o->pthread_mutex);
74 B_USE(res)
75 ASSERT(res == 0)
76 #endif
77 }
78  
79 static void BMutex_Lock (BMutex *o)
80 {
81 DebugObject_Access(&o->d_obj);
82  
83 #if BADVPN_THREAD_SAFE
84 int res = pthread_mutex_lock(&o->pthread_mutex);
85 B_USE(res)
86 ASSERT(res == 0)
87 #endif
88 }
89  
90 static void BMutex_Unlock (BMutex *o)
91 {
92 DebugObject_Access(&o->d_obj);
93  
94 #if BADVPN_THREAD_SAFE
95 int res = pthread_mutex_unlock(&o->pthread_mutex);
96 B_USE(res)
97 ASSERT(res == 0)
98 #endif
99 }
100  
101 #endif