[Qemu-devel] sigaction in windows

[Qemu-devel] sigaction in windows

[bang bang]

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Hi, everyone:
     I am very sorry to trouble you, but I have a question that need your
help. As we know, sigaction is not defined in windows, but qemu can run on
windows, I want to know how the qemu to implement sigaction so that it can
run on windows an linux. I am very sorry to not find their implementation
with windows.
   Thank you veye much!!!

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Re: [Qemu-devel] sigaction in windows

[Paolo Bonzini]

Il 14/05/2012 05:47, bang bang ha scritto:
> Hi, everyone:
>      I am very sorry to trouble you, but I have a question that need
> your help. As we know, sigaction is not defined in windows, but qemu can
> run on windows, I want to know how the qemu to implement sigaction so
> that it can run on windows an linux. I am very sorry to not find their
> implementation with windows. 

It doesn't use sigaction. :)  Whenever the POSIX version would send a
signal to a thread, the Windows version does the following:

- call SuspendThread on the receiving thread;

- execute the signal handler code in the sending thread;

- call ResumeThread on the receiving thread.

It is not exactly the same thing, but it is enough for QEMU's needs.

Paolo

Re: [Qemu-devel] sigaction in windows

[Mulyadi Santosa]

Hi...

On Mon, May 14, 2012 at 3:39 PM, Paolo Bonzini <pbonzini@redhat.com> wrote:
> It doesn't use sigaction. :)  Whenever the POSIX version would send a
> signal to a thread, the Windows version does the following:
>
> - call SuspendThread on the receiving thread;
>
> - execute the signal handler code in the sending thread;

you meant, "the receiving thread", right?

>
> - call ResumeThread on the receiving thread.
>
> It is not exactly the same thing, but it is enough for QEMU's needs.
>
> Paolo
>
>



-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

Re: [Qemu-devel] sigaction in windows

[Paolo Bonzini]

Il 14/05/2012 17:51, Mulyadi Santosa ha scritto:
> Hi...
> 
> On Mon, May 14, 2012 at 3:39 PM, Paolo Bonzini <pbonzini@redhat.com> wrote:
>> It doesn't use sigaction. :)  Whenever the POSIX version would send a
>> signal to a thread, the Windows version does the following:
>>
>> - call SuspendThread on the receiving thread;
>>
>> - execute the signal handler code in the sending thread;
> 
> you meant, "the receiving thread", right?

No, in the sending thread.  That's why I said it is not exactly the same
thing.

Paolo

>>
>> - call ResumeThread on the receiving thread.
>>
>> It is not exactly the same thing, but it is enough for QEMU's needs.
>>
>> Paolo
>>
>>
> 
> 
> 

Re: [Qemu-devel] sigaction in windows

[Mulyadi Santosa]

Hi....

On Mon, May 14, 2012 at 10:55 PM, Paolo Bonzini <pbonzini@redhat.com> wrote:
>> you meant, "the receiving thread", right?
>
> No, in the sending thread.  That's why I said it is not exactly the same
> thing.
>
> Paolo

Interesting...thanks for the clarification...

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com