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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 } |
| (...skipping 17 matching lines...) Expand all Loading... |
| 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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