fileinstall-plugins/installer/src/main/java/org/apache/felix/fileinstall/plugins/installer/impl/Locking.java

/*******************************************************************************
 * Copyright (c) Intel Corporation
 * Copyright (c) 2017
 *
 * 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.
 *******************************************************************************/
package org.apache.felix.fileinstall.plugins.installer.impl;

import java.util.concurrent.locks.Lock;
import java.util.function.Function;
import java.util.function.Supplier;

final class Locking {

	public static void withLock(Lock lock, Runnable cmd) {
		lock.lock();
		try {
			cmd.run();
		} finally {
			lock.unlock();
		}
	}

	public static <R> R withLock(Lock lock, Supplier<R> fun) {
		lock.lock();
		try {
			return fun.get();
		} finally {
			lock.unlock();
		}
	}

	public static <T, R> R withLock(Lock lock, Function<T, R> fun, T in) {
		lock.lock();
		try {
			return fun.apply(in);
		} finally {
			lock.unlock();
		}
	}

}