/*******************************************************************************
 * Copyright (c) 2015-2018 Skymind, Inc.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Apache License, Version 2.0 which is available at
 * https://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.
 *
 * SPDX-License-Identifier: Apache-2.0
 ******************************************************************************/

//
// Created by raver119 on 07.10.2017.
//

#include <memory/MemoryRegistrator.h>

namespace sd {
    namespace memory {

        MemoryRegistrator::MemoryRegistrator() {
            _workspace = nullptr;
        };

        MemoryRegistrator& MemoryRegistrator::getInstance() {
          static MemoryRegistrator instance;
          return instance;
        }

        bool MemoryRegistrator::hasWorkspaceAttached() {
            return _workspace != nullptr;
        }

        Workspace* MemoryRegistrator::getWorkspace() {
            return _workspace;
        }

        void MemoryRegistrator::attachWorkspace(Workspace* workspace) {
            _workspace = workspace;
        }

        void MemoryRegistrator::forgetWorkspace() {
            _workspace = nullptr;
        }

        void MemoryRegistrator::setGraphMemoryFootprint(Nd4jLong hash, Nd4jLong bytes) {
            _lock.lock();
    
            _footprint[hash] = bytes;

            _lock.unlock();
        }

        void MemoryRegistrator::setGraphMemoryFootprintIfGreater(Nd4jLong hash, Nd4jLong bytes) {
            _lock.lock();

            if (_footprint.count(hash) == 0)
                _footprint[hash] = bytes;
            else {
                Nd4jLong cv = _footprint[hash];
                if (bytes > cv)
                    _footprint[hash] = bytes;
            }

            _lock.unlock();
        }

        Nd4jLong MemoryRegistrator::getGraphMemoryFootprint(Nd4jLong hash) {
            _lock.lock();
            
            Nd4jLong result = 0L;
            if (_footprint.count(hash) > 0)
                result = _footprint[hash];
        
            _lock.unlock();

            return result;
        }
    }
}