replicant-frameworks_native/include/utils/Singleton.h
Mathias Agopian 076b1cc3a9 Integrate from //sandbox/mathias/donut/...@145728
SurfaceFlinger rework for new EGL driver model support.
2009-04-10 14:24:30 -07:00

60 lines
1.6 KiB
C++

/*
* Copyright (C) 2007 The Android Open Source Project
*
* 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 ANDROID_UTILS_SINGLETON_H
#define ANDROID_UTILS_SINGLETON_H
#include <stdint.h>
#include <sys/types.h>
#include <utils/threads.h>
namespace android {
// ---------------------------------------------------------------------------
template <typename TYPE>
class Singleton
{
public:
static TYPE& getInstance() {
Mutex::Autolock _l(sLock);
TYPE* instance = sInstance;
if (instance == 0) {
instance = new TYPE();
sInstance = instance;
}
return *instance;
}
protected:
~Singleton() { };
Singleton() { };
private:
Singleton(const Singleton&);
Singleton& operator = (const Singleton&);
static Mutex sLock;
static TYPE* sInstance;
};
template<class TYPE> Mutex Singleton<TYPE>::sLock;
template<class TYPE> TYPE* Singleton<TYPE>::sInstance(0);
// ---------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_UTILS_SINGLETON_H