/*
 *  ******************************************************************************
 *  *
 *  *
 *  * 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.linalg.cpu.nativecpu.ops;

import org.nd4j.linalg.api.memory.Deallocator;
import org.nd4j.linalg.factory.Nd4j;
import org.nd4j.linalg.profiler.OpContextTracker;
import org.nd4j.linalg.profiler.data.eventlogger.EventLogger;
import org.nd4j.linalg.profiler.data.eventlogger.EventType;
import org.nd4j.linalg.profiler.data.eventlogger.LogEvent;
import org.nd4j.linalg.profiler.data.eventlogger.ObjectAllocationType;
import org.nd4j.nativeblas.NativeOpsHolder;
import org.nd4j.nativeblas.OpaqueContext;

public class CpuOpContextDeallocator implements Deallocator {
    private transient final OpaqueContext context;
    private LogEvent logEvent;
    private long ctxId = -1;


    public CpuOpContextDeallocator(CpuOpContext ctx) {
        context = (OpaqueContext) ctx.contextPointer();
        if(EventLogger.getInstance().isEnabled()) {
            logEvent = LogEvent.builder()
                    .eventType(EventType.DEALLOCATION)
                    .objectAllocationType(ObjectAllocationType.OP_CONTEXT)
                    .associatedWorkspace(Nd4j.getWorkspaceManager().getWorkspaceForCurrentThread().getId())
                    .build();

        }

        if(OpContextTracker.getInstance().isEnabled()) {
            ctxId = ctx.id();
        }

    }

    @Override
    public void deallocate() {
        //update the log event with the actual time of de allocation and then
        //perform logging
        if(logEvent != null) {
            logEvent.setEventTimeMs(System.currentTimeMillis());
            logEvent.setThreadName(Thread.currentThread().getName());
            EventLogger.getInstance().log(logEvent);
        }

        if(OpContextTracker.getInstance().isEnabled()) {
            OpContextTracker.getInstance().deallocateContext(ctxId);
        }

        NativeOpsHolder.getInstance().getDeviceNativeOps().deleteGraphContext(context);
    }

    @Override
    public LogEvent logEvent() {
        return logEvent;
    }

    @Override
    public boolean isConstant() {
        return false;
    }
}
