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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "mojo/public/cpp/utility/mutex.h" | |
6 | |
7 #include <assert.h> | |
8 #include <errno.h> | |
9 | |
10 namespace mojo { | |
11 | |
12 // Release builds have inlined (non-error-checking) definitions in the header. | |
13 #if !defined(NDEBUG) | |
14 Mutex::Mutex() { | |
15 pthread_mutexattr_t mutexattr; | |
16 int rv = pthread_mutexattr_init(&mutexattr); | |
17 assert(rv == 0); | |
18 rv = pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_ERRORCHECK); | |
19 assert(rv == 0); | |
20 rv = pthread_mutex_init(&mutex_, &mutexattr); | |
21 assert(rv == 0); | |
22 rv = pthread_mutexattr_destroy(&mutexattr); | |
23 assert(rv == 0); | |
24 } | |
25 | |
26 Mutex::~Mutex() { | |
27 int rv = pthread_mutex_destroy(&mutex_); | |
28 assert(rv == 0); | |
29 } | |
30 | |
31 void Mutex::Lock() { | |
32 int rv = pthread_mutex_lock(&mutex_); | |
33 assert(rv == 0); | |
34 } | |
35 | |
36 void Mutex::Unlock() { | |
37 int rv = pthread_mutex_unlock(&mutex_); | |
38 assert(rv == 0); | |
39 } | |
40 | |
41 bool Mutex::TryLock() { | |
42 int rv = pthread_mutex_trylock(&mutex_); | |
43 assert(rv == 0 || rv == EBUSY); | |
44 return rv == 0; | |
45 } | |
46 | |
47 void Mutex::AssertHeld() { | |
48 assert(pthread_mutex_lock(&mutex_) == EDEADLK); | |
49 } | |
50 #endif // !defined(NDEBUG) | |
51 | |
52 } // namespace mojo | |
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