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annotate dwtx/dwtxhelper/Timer.d @ 167:862b05e0334a

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Add a wrapper for Thread
author Frank Benoit <benoit@tionex.de>
date Tue, 09 Sep 2008 15:59:16 +0200
parents 86617aa6b5dd
children 1470d66733fa
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1 module dwtx.dwtxhelper.Timer;
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2
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3 import dwtx.dwtxhelper.TimerTask;
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4 import tango.util.container.CircularList;
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5 import dwtx.dwtxhelper.JThread;
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6 import tango.core.sync.Mutex;
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7 import tango.core.sync.Condition;
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8 import tango.time.Time;
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9 import tango.time.Clock;
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10
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11 class Timer {
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12
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13 alias CircularList!( TimerTask ) ListType;
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14
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15 private JThread thread;
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16 private ListType schedules;
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17 private Mutex mutex;
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18 private Condition cond;
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19 private bool isCanceled = false;
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20
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21 this(){
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22 this(false);
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23 }
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24 this(bool isDaemon){
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25 mutex = new Mutex();
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26 cond = new Condition( mutex );
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27
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28 schedules = new ListType();
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29 thread = new JThread( &run );
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30 thread.setDaemon( isDaemon );
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31 thread.start();
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32 }
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33 private void run(){
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34
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35 while( !isCanceled ){
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36 TimerTask timerTask = null;
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37 synchronized(mutex){
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38 bool isReady = false;
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39 do{
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40 if( isCanceled ){
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41 return;
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42 }
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43
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44 if( schedules.size() is 0 ){
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45 cond.wait();
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46 }
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47 else{
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48 timerTask = schedules.head();
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49 TimeSpan toWait = timerTask.executionTime - Clock.now();
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50 if( toWait.interval() > 0 ){
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51 cond.wait( toWait.interval() );
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52 }
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53 else{
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54 schedules.removeHead();
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55 isReady = true;
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56 }
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57 }
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58 }while( !isReady );
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59 }
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60 if( timerTask ){
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61 timerTask.run();
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62 if( timerTask.period.millis > 0 ){
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63 timerTask.executionTime += timerTask.period;
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64 synchronized(mutex){
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65 int index = 0;
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66 foreach( tt; schedules ){
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67 if( tt.executionTime > timerTask.executionTime ){
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68 break;
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69 }
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70 index++;
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71 }
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72 schedules.addAt( index, timerTask );
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73 }
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74 }
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75 }
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76 }
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77 }
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78 void cancel(){
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79 synchronized(mutex){
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80 isCanceled = true;
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81 cond.notifyAll();
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82 }
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83 }
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84 void schedule(TimerTask task, long delay){
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85 scheduleAtFixedRate( task, delay, 0 );
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86 }
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87 void scheduleAtFixedRate(TimerTask task, long delay, long period){
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88 assert( task );
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89 task.executionTime = Clock.now + TimeSpan.millis(delay);
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90 task.timer = this;
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91 synchronized(mutex){
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92 int index = 0;
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93 foreach( tt; schedules ){
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94 if( tt.executionTime > task.executionTime ){
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95 break;
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96 }
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97 index++;
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98 }
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99 schedules.addAt( index, task );
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100 cond.notifyAll();
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101 }
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102 }
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103
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104 // void schedule(TimerTask task, Date time){}
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105 // void schedule(TimerTask task, Date firstTime, long period){}
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106 // void schedule(TimerTask task, long delay, long period){}
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107 // void scheduleAtFixedRate(TimerTask task, Date firstTime, long period){}
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108 }
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