应用程序花费很长时间来同步线程(或根本不同步) [英] Application taking a really long time to synch threads ( or not at all )

问题描述

我正在Delphi XE5(iOS和Android)中使用REST组件.我目前正在通过iOS模拟器进行测试，我的应用程序经常挂在代码中的以下行:

I am using REST components in Delphi XE5 (iOS and Android). I am testing via the iOS simulator currently, and my application often hangs at the following line within my code:

R_Request.Execute;

经过一些调试后，我发现它特别挂在REST.Client.PAS中的这一行代码上:

After some debugging, I find it it specifically hangs at this line of code within the REST.Client.PAS:

HandleEvent(DoAfterExecute);

如下所示:

procedure TCustomRESTRequest.HandleEvent(AEventHandler: TMethod);
begin
  // Handle Synchronized if we are NOT already in the main thread
  // NEVER call synchronize on the MainThread - that might shift the island!
  if SynchronizedEvents and (System.MainThreadID <> TThread.CurrentThread.ThreadID) then
    TThread.Synchronize(TThread.CurrentThread, AEventHandler) // FAILS HERE
  else
    AEventHandler;
end;

要么不返回.Synchronize中的线程，要么花费非常长的时间(大约5分钟)... 它在调试时一次起作用，但此后一次又一次(30分钟后，将其设置为5分钟以返回线程).

It's either NOT returning the thread in the .Synchronize or taking an extremely long time ( 5 minutes or so ) ... It worked once while debugging, but has not ever since and again just now ( 30 min later, and after letting it set for 5 minutes to return a thread).

帮助吗?或者至少有人可以给我任何方向感?

Help ? Or at least any sense of direction anyone can give me?

再次，为iOS和Android开发(因此为FMX ...)，当前正在通过iOS模拟器进行测试. 谢谢 ！

Again, developing for iOS and Android ( so FMX... ) and currently testing via iOS simulator. Thanks !

推荐答案

问题是FireMonkey中的TThread.Synchronize()已损坏.查看此质量控制报告:

The problem is that TThread.Synchronize() is broken in FireMonkey. See this QC report:

报告#123579:TThread.Synchronize()和TThread.Queue()在FireMonkey中无法正常工作

这只是最近才被发现，但是自从首次引入FireMonkey以来，它就被破坏了，直到现在为止还没有人注意到.

This has only just recently been discovered, but it has been broken since FireMonkey was first introduced and nobody apparently noticed until now.

直到Embarcadero对其进行修复，然后尝试在主线程中(例如在计时器中)定期调用CheckSynchronize().

Until Embarcadero fixes it, try calling CheckSynchronize() periodically in the main thread, such as in a timer.

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