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annotate org.eclipse.core.jobs/src/org/eclipse/core/internal/jobs/Semaphore.d @ 78:0a55d2d5a946

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Added file for databinding
author Frank Benoit <benoit@tionex.de>
date Tue, 14 Apr 2009 11:35:29 +0200
parents 52184e4b815c
children
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1 /*******************************************************************************
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2 * Copyright (c) 2003, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module org.eclipse.core.internal.jobs.Semaphore;
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15 import java.lang.Thread;
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16 import tango.core.sync.Mutex;
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17 import tango.core.sync.Condition;
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18 import java.lang.all;
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20 public class Semaphore {
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21 protected long notifications;
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22 protected Thread runnable;
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24 private Mutex mutex;
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25 private Condition condition;
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27 public this(Thread runnable) {
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28 mutex = new Mutex;
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29 condition = new Condition(mutex);
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30 this.runnable = runnable;
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31 notifications = 0;
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32 }
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34 /**
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35 * Attempts to acquire this semaphore. Returns true if it was successfully acquired,
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36 * and false otherwise.
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37 */
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38 public bool acquire(long delay) {
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39 synchronized(mutex){
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40 if (Thread.interrupted())
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41 throw new InterruptedException();
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42 long start = System.currentTimeMillis();
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43 long timeLeft = delay;
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44 while (true) {
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45 if (notifications > 0) {
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46 notifications--;
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47 return true;
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48 }
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49 if (timeLeft <= 0)
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50 return false;
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51 condition.wait(timeLeft/1000.0f);
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52 timeLeft = start + delay - System.currentTimeMillis();
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53 }
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54 }
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55 }
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57 public override int opEquals(Object obj) {
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58 return (runnable is (cast(Semaphore) obj).runnable);
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59 }
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61 public override hash_t toHash() {
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62 return runnable is null ? 0 : (cast(Object)runnable).toHash();
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63 }
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65 public void release() {
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66 synchronized( mutex ){
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67 notifications++;
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68 condition.notifyAll();
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69 }
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70 }
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72 // for debug only
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73 public String toString() {
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74 return Format("Semaphore({})", cast(Object) runnable ); //$NON-NLS-1$ //$NON-NLS-2$
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75 }
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76 }