Re: pgkill on win32

Magnus Hagander wrote:
> Yes. We used to use APCs, but touching anything remotely related to
> Winsock from an APC is not supported... We had a lot of trouble with it
>
By implication you'd be doing socket'y stuff from the signal handler on
UNIX? Scary.
I was assuming it would be used to signal an event that would release
the main
thread and then do the real work there.

I suppose by implication you can't knock a thread out of select from the
APC?

Though, presumably, you could hand over the request to a waiting
application thread
and *that* would have full WinSock access.

I can help feeling that the eventselect mechanism is the one to use, not
the crappy
bsd select emulation.

> initially, and it took a long support case with Microsoft PSS to figure
> out what was broken, because this being unsupported was not properly
> documented.
>
Indeed. And its a very odd limitation given the way that APCs are used
with completion ports.
Did any sort of reference get written to the knowledge base for this, do
you know?

> It certainly is ;-) We could probably find something more efficient,
> but APCs are not the one.
>
The concern I have isn't so much that the mechanism might be a bit ugly,
but the synchronous
delivery and the scheduling gymnastics implied..