| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef LIBRARIES_SDK_UTIL_AUTO_LOCK_H_ |
| #define LIBRARIES_SDK_UTIL_AUTO_LOCK_H_ |
| |
| #include <pthread.h> |
| #include "sdk_util/macros.h" |
| #include "sdk_util/simple_lock.h" |
| |
| namespace sdk_util { |
| |
| // This macro is provided to allow us to quickly instrument locking for |
| // debugging purposes. |
| #define AUTO_LOCK(lock) \ |
| ::sdk_util::AutoLock Lock##__LINE__(lock); |
| |
| class AutoLock { |
| public: |
| AutoLock(const SimpleLock& lock) { |
| lock_ = lock.mutex(); |
| pthread_mutex_lock(lock_); |
| } |
| |
| ~AutoLock() { |
| Unlock(); |
| } |
| |
| void Unlock() { |
| if (lock_) pthread_mutex_unlock(lock_); |
| lock_ = NULL; |
| } |
| |
| private: |
| pthread_mutex_t* lock_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AutoLock); |
| }; |
| |
| } // namespace sdk_util |
| |
| #endif // LIBRARIES_SDK_UTIL_AUTO_LOCK_H_ |