/usr/include/phonenumbers/base/memory/singleton_posix.h is in libphonenumber-dev 7.1.0-5+b1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | // 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_
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