How to force a thread to unwind it's stack?

[davidl]

在 Thu, 28 Aug 2008 08:09:06 +0800，Frank Benoit  
<keinfarbton at googlemail.com> 写道:

> Sascha Katzner schrieb:
>> Why is there no way in D to force a thread to unwind it's stack, for
>> example by sending it an exception like you do in Java with
>> "Thread.interrupt()"?
>>
>> Suppose you have an application which has a thread that has some
>> important resources which need to be released before the application can
>> quit and this thread is currently busy with something which is out of
>> your sphere of influence (like waiting for a network packet or
>> something), so that in the foreseeable future it can't look for a flag
>> of the main thread to quit and release it's resources. How do you force
>> this thread to terminate without compromising the resources it holds or
>> having to release the resources manually in the main thread?
>>
>> Here is an example of how D could implement this stack unwinding:
>> "http://www.woodmann.com/crackz/Tutorials/Seh.htm#Exception handling in
>> multi-threaded applications" (8th point)
>>
>> LLAP,
>> Sascha
>>
>
> a tango ticket related to this:
> http://dsource.org/projects/tango/ticket/1009
>

It's pity that modern OS not get this useful API built-in. That's design  
flaw clearly.
I'm pretty sure future GOOD OS will get this API integrated if the  
designers are not
idiots. As soon as OS designers realize how useful it is, they will get it  
done. But I
doubt it's really a tough thing to implement with support from OS.  
especially on windows.
the possible user-mode implementation i can think of firstly stop the  
thread, then write
throw exception code to EIP, then resume the thread. yet it's not a clean  
solution. or
even with such thing, the application might still hang becuase the thread  
might stop at a WaitForSingleObject or WaitForMultipleObject. So that's  
why I say it should be built-in the OS.



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