| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.cassandra.simulator.systems; |
| |
| import org.apache.cassandra.utils.concurrent.Awaitable; |
| import org.apache.cassandra.utils.concurrent.Condition; |
| |
| import static org.apache.cassandra.utils.Clock.Global.nanoTime; |
| |
| public class NotInterceptedSyncCondition extends Awaitable.AbstractAwaitable implements Condition |
| { |
| private volatile boolean isSignalled; |
| |
| @Override |
| public synchronized boolean awaitUntil(long nanoTimeDeadline) throws InterruptedException |
| { |
| while (true) |
| { |
| if (isSignalled()) return true; |
| if (!notInterceptedWaitUntil(this, nanoTimeDeadline)) return false; |
| } |
| } |
| |
| @Override |
| public synchronized Awaitable await() throws InterruptedException |
| { |
| while (!isSignalled) |
| wait(); |
| return this; |
| } |
| |
| @Override |
| public boolean isSignalled() |
| { |
| return isSignalled; |
| } |
| |
| @Override |
| public synchronized void signal() |
| { |
| isSignalled = true; |
| notifyAll(); |
| } |
| |
| private static boolean notInterceptedWaitUntil(Object monitor, long deadlineNanos) throws InterruptedException |
| { |
| long wait = deadlineNanos - nanoTime(); |
| if (wait <= 0) |
| return false; |
| |
| monitor.wait((wait + 999999) / 1000000); |
| return true; |
| } |
| } |