| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * 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 com.intellij.debugger.impl; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| |
| /** |
| * @author Eugene Zhuravlev |
| * Date: Nov 17, 2009 |
| */ |
| public class SynchronizationBasedSemaphore { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.debugger.impl.Semaphore"); |
| private int mySemaphore = 0; |
| |
| public synchronized void down() { |
| mySemaphore++; |
| if (mySemaphore == 0) { |
| notifyAll(); |
| } |
| } |
| |
| public synchronized void up() { |
| mySemaphore--; |
| if (mySemaphore == 0) { |
| notifyAll(); |
| } |
| } |
| |
| public synchronized void waitFor() { |
| try { |
| while (mySemaphore > 0) { |
| wait(); |
| } |
| } |
| catch (InterruptedException e) { |
| LOG.debug(e); |
| throw new RuntimeException(e); |
| } |
| } |
| |
| public synchronized boolean waitFor(final long timeout) { |
| try { |
| if (mySemaphore == 0) return true; |
| final long startTime = System.currentTimeMillis(); |
| long waitTime = timeout; |
| while (mySemaphore > 0) { |
| wait(waitTime); |
| final long elapsed = System.currentTimeMillis() - startTime; |
| if (elapsed < timeout) { |
| waitTime = timeout - elapsed; |
| } |
| else { |
| break; |
| } |
| } |
| return mySemaphore == 0; |
| } |
| catch (InterruptedException e) { |
| LOG.debug(e); |
| throw new RuntimeException(e); |
| } |
| } |
| |
| } |