| From: | Magnus Hagander <magnus(at)hagander(dot)net> |
|---|---|
| To: | James Mansion <james(at)mansionfamily(dot)plus(dot)com> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pgkill on win32 |
| Date: | 2008-04-20 17:08:38 |
| Message-ID: | 20080420190838.333ebef9@mha-laptop |
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| Lists: | pgsql-hackers |
James Mansion wrote:
> I'm wondering if the mechanism used for sending signals between
> postmaster processes on Win32 is much more heavyweight that is
> necessary.
>
> Is there a reason not to call OpenThread on the target postmaster's
> thread id, and then use QueueUserAPC to execute a 'signal handler'
> method on it? (Or Terminate Thread for 'extreme' cases).
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
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.
> Haven't tried it - but I can't help thinking that the named pipe
> service is a bit heavyweight.
It certainly is ;-) We could probably find something more efficient,
but APCs are not the one.
//Magnus
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