/*
    * Copyright (C) 2010, Google Inc. and others
    *
    * This program and the accompanying materials are made available under the
    * terms of the Eclipse Distribution License v. 1.0 which is available at
    * https://www.eclipse.org/org/documents/edl-v10.php.
    *
    * SPDX-License-Identifier: BSD-3-Clause
    */
  
  package org.eclipse.jgit.internal.storage.pack;
  
  import java.util.concurrent.locks.ReentrantLock;
  
  import org.eclipse.jgit.storage.pack.PackConfig;
  
  class ThreadSafeDeltaCache extends DeltaCache {
  	private final ReentrantLock lock;
  
  	ThreadSafeDeltaCache(PackConfig pc) {
  		super(pc);
  		lock = new ReentrantLock();
  	}
  
  	@Override
  	boolean canCache(int length, ObjectToPack src, ObjectToPack res) {
  		lock.lock();
  		try {
  			return super.canCache(length, src, res);
  		} finally {
  			lock.unlock();
  		}
  	}
  
  	@Override
  	void credit(int reservedSize) {
  		lock.lock();
  		try {
  			super.credit(reservedSize);
  		} finally {
  			lock.unlock();
  		}
  	}
  
  	@Override
  	Ref cache(byte[] data, int actLen, int reservedSize) {
  		data = resize(data, actLen);
  		lock.lock();
  		try {
  			return super.cache(data, actLen, reservedSize);
  		} finally {
  			lock.unlock();
  		}
  	}
  }