root / trunk / web / dojo / dojox / timing / ThreadPool.js
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| 1 | 9 | andrej.cim | /*
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| 2 | Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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| 3 | Available via Academic Free License >= 2.1 OR the modified BSD license.
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| 4 | see: http://dojotoolkit.org/license for details
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| 5 | */
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| 6 | |||
| 7 | |||
| 8 | if(!dojo._hasResource["dojox.timing.ThreadPool"]){ |
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| 9 | dojo._hasResource["dojox.timing.ThreadPool"]=true; |
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| 10 | dojo.provide("dojox.timing.ThreadPool");
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| 11 | dojo.require("dojox.timing");
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| 12 | dojo.experimental("dojox.timing.ThreadPool");
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| 13 | (function(){
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| 14 | var t=dojox.timing;
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| 15 | t.threadStates={UNSTARTED:"unstarted",STOPPED:"stopped",PENDING:"pending",RUNNING:"running",SUSPENDED:"suspended",WAITING:"waiting",COMPLETE:"complete",ERROR:"error"};
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| 16 | t.threadPriorities={LOWEST:1,BELOWNORMAL:2,NORMAL:3,ABOVENORMAL:4,HIGHEST:5};
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| 17 | t.Thread=function(fn,_1){ |
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| 18 | var _2=this; |
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| 19 | this.state=t.threadStates.UNSTARTED;
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| 20 | this.priority=_1||t.threadPriorities.NORMAL;
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| 21 | this.lastError=null; |
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| 22 | this.func=fn;
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| 23 | this.invoke=function(){ |
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| 24 | _2.state=t.threadStates.RUNNING; |
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| 25 | try{
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| 26 | fn(this);
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| 27 | _2.state=t.threadStates.COMPLETE; |
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| 28 | } |
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| 29 | catch(e){
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| 30 | _2.lastError=e; |
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| 31 | _2.state=t.threadStates.ERROR; |
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| 32 | } |
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| 33 | }; |
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| 34 | }; |
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| 35 | t.ThreadPool=new (function(_3,_4){ |
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| 36 | var _5=this; |
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| 37 | var _6=_3;
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| 38 | var _7=_6;
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| 39 | var _8=_4;
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| 40 | var _9=Math.floor((_8/2)/_6); |
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| 41 | var _a=[];
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| 42 | var _b=new Array(_6+1); |
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| 43 | var _c=new dojox.timing.Timer(); |
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| 44 | var _d=function(){ |
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| 45 | var _e=_b[0]={}; |
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| 46 | for(var i=0;i<_b.length;i++){ |
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| 47 | window.clearTimeout(_b[i]); |
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| 48 | var _f=_a.shift();
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| 49 | if(typeof (_f)=="undefined"){ |
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| 50 | break;
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| 51 | } |
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| 52 | _e["thread-"+i]=_f;
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| 53 | _b[i]=window.setTimeout(_f.invoke,(_9*i)); |
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| 54 | } |
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| 55 | _7=_6-(i-1);
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| 56 | }; |
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| 57 | this.getMaxThreads=function(){ |
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| 58 | return _6;
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| 59 | }; |
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| 60 | this.getAvailableThreads=function(){ |
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| 61 | return _7;
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| 62 | }; |
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| 63 | this.getTickInterval=function(){ |
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| 64 | return _8;
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| 65 | }; |
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| 66 | this.queueUserWorkItem=function(fn){ |
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| 67 | var _10=fn;
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| 68 | if(_10 instanceof Function){ |
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| 69 | _10=new t.Thread(_10);
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| 70 | } |
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| 71 | var idx=_a.length;
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| 72 | for(var i=0;i<_a.length;i++){ |
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| 73 | if(_a[i].priority<_10.priority){
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| 74 | idx=i; |
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| 75 | break;
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| 76 | } |
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| 77 | } |
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| 78 | if(idx<_a.length){
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| 79 | _a.splice(idx,0,_10);
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| 80 | }else{
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| 81 | _a.push(_10); |
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| 82 | } |
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| 83 | return true; |
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| 84 | }; |
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| 85 | this.removeQueuedUserWorkItem=function(_11){ |
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| 86 | if(_11 instanceof Function){ |
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| 87 | var idx=-1; |
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| 88 | for(var i=0;i<_a.length;i++){ |
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| 89 | if(_a[i].func==_11){
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| 90 | idx=i; |
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| 91 | break;
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| 92 | } |
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| 93 | } |
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| 94 | if(idx>-1){ |
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| 95 | _a.splice(idx,1);
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| 96 | return true; |
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| 97 | } |
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| 98 | return false; |
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| 99 | } |
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| 100 | var idx=-1; |
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| 101 | for(var i=0;i<_a.length;i++){ |
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| 102 | if(_a[i]==_11){
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| 103 | idx=i; |
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| 104 | break;
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| 105 | } |
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| 106 | } |
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| 107 | if(idx>-1){ |
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| 108 | _a.splice(idx,1);
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| 109 | return true; |
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| 110 | } |
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| 111 | return false; |
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| 112 | }; |
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| 113 | this.start=function(){ |
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| 114 | _c.start(); |
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| 115 | }; |
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| 116 | this.stop=function(){ |
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| 117 | _c.stop(); |
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| 118 | }; |
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| 119 | this.abort=function(){ |
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| 120 | this.stop();
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| 121 | for(var i=1;i<_b.length;i++){ |
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| 122 | if(_b[i]){
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| 123 | window.clearTimeout(_b[i]); |
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| 124 | } |
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| 125 | } |
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| 126 | for(var _12 in _b[0]){ |
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| 127 | this.queueUserWorkItem(_12);
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| 128 | } |
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| 129 | _b[0]={};
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| 130 | }; |
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| 131 | this.reset=function(){ |
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| 132 | this.abort();
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| 133 | _a=[]; |
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| 134 | }; |
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| 135 | this.sleep=function(_13){ |
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| 136 | _c.stop(); |
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| 137 | window.setTimeout(_c.start,_13); |
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| 138 | }; |
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| 139 | _c.onTick=_5.invoke; |
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| 140 | })(16,5000); |
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| 141 | })(); |
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| 142 | } |