Author: Andrew Dados
Date: 18:41:39 12/05/00
Go up one level in this thread
On December 05, 2000 at 21:24:16, Vincent Diepeveen wrote:
>On December 05, 2000 at 12:37:02, Bruce Moreland wrote:
>
>>On December 05, 2000 at 10:28:27, Vincent Diepeveen wrote:
>>
>>>this is not nonsense. blocking is GARANTUEED by windows.
>>>See the microsoft documents on it. they GARANTUEE blocking to
>>>prevent parallel problems.
>>
>>Are you telling me that if I get a mouse button click message from Windows, and
>>do something outrageously expensive before returning from that message, that my
>>engine threads will block until I return?
>>
>>bruce
>
>Argh damn it again i wrote something and i wrote it for nothing
>as IE4 forgot what i wrote somehow i hit some buttons and all
>my written text gone!
>
>Online writing is not my favourite thing!
>
>Anyway what you write here above is a generalization that doesn't
>apply always.
>
>What i did was next
>
> WndProc gets called as user clicks in pulldownwindow quit.
> then in wndproc i call function: killthecrap();
>
> void KillTheCrap(HWND hwnd, ..) {
> ..
> ..("Are you sure?");
> ..("Are you very sure?");
> ..("You really don't follow my advice?");
> ..
> SendToEngine(QuitEngine); /* now the engine
> gets a quit message. After it has processed it
> it ships acknowledgement to the enginethread
> that listens to the engine.
> The enginethread puts after getting acknowledgement
> the volatile variable quitengine to 1.
> then the enginethread quits.
>
> while(!quitengine) {
> ;
> }
>
> }
>
>Now my program was hung. I figured out that the enginethread
>was blocked as long as my program was still in the WndProc()
>
>This should be pretty easy to test at home.
>
>Greetings,
>Vincent
Hmm everytime I click on 'stop thinking' in my gui I execute similar code as
yours in my message dispatcher (it waits for engine thread to abort search then
that thread 'ends' itself). Everything works fine (since it is all written in
Delphi I refrain from posting code :).
-Andrew-
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