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Re: fork/exec patch: pre-CreateProcess finalization

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Jan Wieck <JanWieck(at)Yahoo(dot)com>,Claudio Natoli <claudio(dot)natoli(at)memetrics(dot)com>,"''pgsql-patches(at)postgresql(dot)org' '" <pgsql-patches(at)postgresql(dot)org>
Subject: Re: fork/exec patch: pre-CreateProcess finalization
Date: 2004-01-09 00:48:00
Message-ID: 200401090048.i090m0911277@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers-win32pgsql-patches
Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > My guess is that this used to proc_exit the postgres backend, but now
> > proc_exits the postmaster, but that is only a guess.
> 
> No.  This is post-fork (and had better remain so).  The change causes
> the sub-postmaster that has just finished handling a cancel request
> to exit with nonzero status, which the postmaster then interprets
> (correctly) as a child process crash.
> 
> BTW, how are we going to do cancels in Windows-land?  The sub-postmaster
> isn't gonna have access to the postmaster's list of child PIDs and
> cancel keys ...

I think the postmaster will have access to the cancel key and pid.  It
should work similar to Unix.  However, I do have a win32 TODO item on
"test cancel key", so we will not forget about it.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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