javascript线程模拟【原创】

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javascript线程模拟【原创】

　　在javascript中，是没有线程的，只能模拟一个了，前些日子写了个，现在把它贴出来。
　　thread.js:
/**
* 线程管理类
* @author zxub 2006-06-12
*/
function Thread(_task,_delay,_times)
{
    this.runFlag=false;
    this.busyFlag=false;
    this.taskArgs=Array.prototype.slice.call(arguments,3);

    if (_times!=undefined)
    {
        this.times=_times;
    }
    else
    {
        this.times=1;
    }

    var _point=this;

    this.timerID=-1;

    this.start=function()
    {
        if (this.runFlag==false)
        {
            this.timerID=window.setInterval(_point.run,_delay);
            this.runFlag=true;
        }
    }

    this.run=function()
    {
        if (_point.busyFlag) return;
        if (_point.times==-1)//无限循环
        {
            _task(_point.taskArgs);
        }
        else if (_point.times>0)
        {
            _task(_point.taskArgs);
            _point.times-=1;
            if (_point.times==0)
            {
                window.clearInterval(this.timerID);
            }
        }
    }

    this.sleep=function()
    {
        this.busyFlag=true;
    }

    this.resume=function()
    {
        this.busyFlag=false;
    }

    this.abort=function()
    {
        window.clearInterval(this.timerID);
    }
}
　　例子如下：
<html>
<head>
<title>测试</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="thread.js"></script>
<style type="text/css">

</style>
</head>
<body>
<script>
var func=function(_o)
{
    document.getElementById(_o).innerHTML=parseInt(document.getElementById(_o).innerHTML)+1;
}
var t1=new Thread(func,50,121,"t1");
var t2=new Thread(func,200,20,"t2");
</script>
<input type="button" value="start1" onclick='t1.start();'></input>
<input type="button" value="sleep1" onclick='t1.sleep();'></input>
<input type="button" value="resume1" onclick='t1.resume();'></input>
<input type="button" value="abort1" onclick='t1.abort();'></input>
<input type="button" value="start2" onclick='t2.start();'></input>
<input type="button" value="sleep2" onclick='t2.sleep();'></input>
<input type="button" value="resume2" onclick='t2.resume();'></input>
<input type="button" value="abort2" onclick='t2.abort();'></input>
<div id="t1">0</div> | <div id="t2">0</div>
<input type="button" value="t1.timerID" onclick='alert(t1.timerID);'></input>
<input type="button" value="t2.timerID" onclick='alert(t2.timerID);'></input>
</body>
</html>

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原文地址：https://www.cnblogs.com/zxub/p/438261.html