GPUResourceManager.h

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/* Copyright 2016 Kristofer Björnson
 *
 * 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 COM_DAFER45_TBTK_GPU_RESOURCE_MANAGER
#define COM_DAFER45_TBTK_GPU_RESOURCE_MANAGER

#include <omp.h>

namespace TBTK{

class GPUResourceManager{
public:
    int getNumDevices();

    int allocateDevice();

    void freeDevice(int device);

    static GPUResourceManager& getInstance();
private:
    GPUResourceManager();

    GPUResourceManager(const GPUResourceManager &gpuResourceManager) = delete;

    GPUResourceManager& operator=(const GPUResourceManager &gpuResourceManager) = delete;

    int numDevices;

    bool *busyDevices;

    omp_lock_t busyDevicesLock;

    void createDeviceTable();

    void destroyDeviceTable();
};

inline int GPUResourceManager::getNumDevices(){
    return numDevices;
}

};  //End of namespace TBTK

#endif