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/*
 *  ******************************************************************************
 *  *
 *  *
 *  * 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.
 *  *
 *  *  See the NOTICE file distributed with this work for additional
 *  *  information regarding copyright ownership.
 *  * 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
 *  *****************************************************************************
 */

package org.nd4j.jita.memory;

import org.nd4j.jita.allocator.enums.AllocationStatus;
import org.nd4j.jita.allocator.impl.AllocationPoint;
import org.nd4j.jita.allocator.impl.AllocationShape;
import org.nd4j.jita.allocator.pointers.PointersPair;

/**
 * This interface describes 2 basic methods to work with memory: malloc and free.
 *
 * @author [email protected]
 */
public interface MemoryProvider {
    /**
     * This method provides PointersPair to memory chunk specified by AllocationShape
     *
     * @param shape shape of desired memory chunk
     * @param point target AllocationPoint structure
     * @param location either HOST or DEVICE
     * @return
     */
    PointersPair malloc(AllocationShape shape, AllocationPoint point, AllocationStatus location);

    /**
     * This method frees specific chunk of memory, described by AllocationPoint passed in
     *
     * @param point
     */
    void free(AllocationPoint point);

    /**
     * This method checks specified device for specified amount of memory
     *
     * @param deviceId
     * @param requiredMemory
     * @return
     */
    boolean pingDeviceForFreeMemory(Integer deviceId, long requiredMemory);


    void purgeCache();
}