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/*
* Copyright (C) 2016 Rockchip Electronics Co., Ltd.
* Authors:
* Zhiqin Wei <[email protected]>
*
* 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 _LIBS_RGA_SINGLETON_H
#define _LIBS_RGA_SINGLETON_H
#ifndef ANDROID
#include "RgaMutex.h"
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundefined-var-template"
#endif
template <typename TYPE>
class Singleton {
public:
static TYPE& getInstance() {
Mutex::Autolock _l(sLock);
TYPE* instance = sInstance;
if (instance == nullptr) {
instance = new TYPE();
sInstance = instance;
}
return *instance;
}
static bool hasInstance() {
Mutex::Autolock _l(sLock);
return sInstance != nullptr;
}
protected:
~Singleton() { }
Singleton() { }
private:
Singleton(const Singleton&);
Singleton& operator = (const Singleton&);
static Mutex sLock;
static TYPE* sInstance;
};
#if defined(__clang__)
#pragma clang diagnostic pop
#endif
#define RGA_SINGLETON_STATIC_INSTANCE(TYPE) \
template<> ::Mutex \
(::Singleton< TYPE >::sLock)(::Mutex::PRIVATE); \
template<> TYPE* ::Singleton< TYPE >::sInstance(nullptr); /* NOLINT */ \
template class ::Singleton< TYPE >;
#endif //ANDROID
#endif //_LIBS_RGA_SINGLETON_H
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