| // Copyright (C) 2013 The Libphonenumber Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef I18N_PHONENUMBERS_BASE_MEMORY_SINGLETON_POSIX_H_ |
| #define I18N_PHONENUMBERS_BASE_MEMORY_SINGLETON_POSIX_H_ |
| |
| #include <pthread.h> |
| |
| #include "phonenumbers/base/logging.h" |
| |
| namespace i18n { |
| namespace phonenumbers { |
| |
| template <class T> |
| class Singleton { |
| public: |
| virtual ~Singleton() {} |
| |
| static T* GetInstance() { |
| const int ret = pthread_once(&once_control_, &Init); |
| (void) ret; |
| DCHECK_EQ(0, ret); |
| return instance_; |
| } |
| |
| private: |
| static void Init() { |
| instance_ = new T(); |
| } |
| |
| static T* instance_; // Leaky singleton. |
| static pthread_once_t once_control_; |
| }; |
| |
| template <class T> T* Singleton<T>::instance_; |
| template <class T> pthread_once_t Singleton<T>::once_control_ = |
| PTHREAD_ONCE_INIT; |
| |
| } // namespace phonenumbers |
| } // namespace i18n |
| |
| #endif // I18N_PHONENUMBERS_BASE_MEMORY_SINGLETON_POSIX_H_ |