电脑计算机编程入门教程自学编程语言_aardio教程_并发场景下的独占模式读写文件是怎么实现的?

import win.ui;

/*DSG{{*/

var winform = win.form(text="aardio教程 www.jianma123.com 简码编程";right=389;bottom=246)

winform.add(

button={cls="button";text="独占模式打开读写此文件";left=90;top=187;right=253;bottom=218;z=2};

button2={cls="button";text="关闭此文件";left=268;top=187;right=354;bottom=218;z=4};

editLog={cls="edit";left=74;top=51;right=378;bottom=161;autohscroll=false;edge=1;multiline=1;vscroll=1;z=3};

editPath={cls="edit";text="C:\Users\Administrator\Desktop\user.txt";left=74;top=17;right=378;bottom=43;edge=1;multiline=1;z=1};

static={cls="static";text="文件路径:";left=10;top=21;right=69;bottom=40;align="right";transparent=1;z=5};

static2={cls="static";text="提示:";left=10;top=53;right=69;bottom=72;align="right";transparent=1;z=6}

)

/*}}*/



var file,err;



winform.button.oncommand = function(id,event){

    var path = winform.editPath.text;

    file,err = ..io.open(path,"w+b",0x10/*独占读写*/);

    if(!file){

        winform.editLog.print("无此文件",file,err);        

    }else {

        winform.editLog.print("已打开此文件",file,err);    

        winform.editLog.print("此时再用记事本等其它编辑器打开此文件会弹出无法打开的错误提示");

    }    

}



winform.button2.oncommand = function(id,event){

    file.close();

    winform.editLog.print("已关闭此文件");    

}



winform.show();

win.loopMessage();