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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MOJO_PUBLIC_CPP_UTILITY_MUTEX_H_ | 5 #ifndef MOJO_PUBLIC_CPP_UTILITY_MUTEX_H_ |
6 #define MOJO_PUBLIC_CPP_UTILITY_MUTEX_H_ | 6 #define MOJO_PUBLIC_CPP_UTILITY_MUTEX_H_ |
7 | 7 |
8 #ifdef _WIN32 | 8 #ifdef _WIN32 |
9 #error "Not implemented: See crbug.com/342893." | 9 #error "Not implemented: See crbug.com/342893." |
10 #endif | 10 #endif |
11 | 11 |
12 #include <pthread.h> | 12 #include <pthread.h> |
13 | 13 |
| 14 #include "base/macros.h" |
14 #include "mojo/public/cpp/system/macros.h" | 15 #include "mojo/public/cpp/system/macros.h" |
15 | 16 |
16 namespace mojo { | 17 namespace mojo { |
17 | 18 |
18 #ifdef NDEBUG | 19 #ifdef NDEBUG |
19 // Note: Make a C++ constant for |PTHREAD_MUTEX_INITIALIZER|. (We can't directly | 20 // Note: Make a C++ constant for |PTHREAD_MUTEX_INITIALIZER|. (We can't directly |
20 // use the C macro in an initializer list, since it might expand to |{ ... }|.) | 21 // use the C macro in an initializer list, since it might expand to |{ ... }|.) |
21 namespace internal { | 22 namespace internal { |
22 const pthread_mutex_t kPthreadMutexInitializer = PTHREAD_MUTEX_INITIALIZER; | 23 const pthread_mutex_t kPthreadMutexInitializer = PTHREAD_MUTEX_INITIALIZER; |
23 } | 24 } |
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41 void Lock(); | 42 void Lock(); |
42 void Unlock(); | 43 void Unlock(); |
43 bool TryLock(); | 44 bool TryLock(); |
44 | 45 |
45 void AssertHeld(); | 46 void AssertHeld(); |
46 #endif | 47 #endif |
47 | 48 |
48 private: | 49 private: |
49 pthread_mutex_t mutex_; | 50 pthread_mutex_t mutex_; |
50 | 51 |
51 MOJO_DISALLOW_COPY_AND_ASSIGN(Mutex); | 52 DISALLOW_COPY_AND_ASSIGN(Mutex); |
52 }; | 53 }; |
53 | 54 |
54 class MutexLock { | 55 class MutexLock { |
55 public: | 56 public: |
56 explicit MutexLock(Mutex* mutex) : mutex_(mutex) { mutex_->Lock(); } | 57 explicit MutexLock(Mutex* mutex) : mutex_(mutex) { mutex_->Lock(); } |
57 ~MutexLock() { mutex_->Unlock(); } | 58 ~MutexLock() { mutex_->Unlock(); } |
58 | 59 |
59 private: | 60 private: |
60 Mutex* const mutex_; | 61 Mutex* const mutex_; |
61 | 62 |
62 MOJO_DISALLOW_COPY_AND_ASSIGN(MutexLock); | 63 DISALLOW_COPY_AND_ASSIGN(MutexLock); |
63 }; | 64 }; |
64 | 65 |
65 // Catch bug where variable name is omitted (e.g., |MutexLock (&mu)|). | 66 // Catch bug where variable name is omitted (e.g., |MutexLock (&mu)|). |
66 #define MutexLock(x) static_assert(0, "MutexLock() missing variable name"); | 67 #define MutexLock(x) static_assert(0, "MutexLock() missing variable name"); |
67 | 68 |
68 } // namespace mojo | 69 } // namespace mojo |
69 | 70 |
70 #endif // MOJO_PUBLIC_CPP_UTILITY_MUTEX_H_ | 71 #endif // MOJO_PUBLIC_CPP_UTILITY_MUTEX_H_ |
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