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Message-ID:	<031401c176ca$d8e0d850$0200a8c0@lifelesswks>
From:	"Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To:	"Charles Wilson" <cwilson AT ece DOT gatech DOT edu>,
	"Michael Haubenwallner" <michael DOT haubenwallner AT salomon DOT at>
Cc:	<cygwin AT cygwin DOT com>
References:	<3BFD0C18 DOT 1C0161D0 AT salomon DOT at> <3C02AD85 DOT 50408 AT ece DOT gatech DOT edu>
Subject:	Re: cygipc-behaviour not like FreeBSD on destroying shmid
Date:	Tue, 27 Nov 2001 09:32:14 +1100
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----- Original Message -----
From: "Charles Wilson" <cwilson AT ece DOT gatech DOT edu>
> > Another problem might be that forking with attached shm does not
> > increment the nattch-counter, but this is not really a problem
> > for me and i suppose this might not be as simple as this one.
>
>
> I *think* that would require special code in cygwin1.dll's fork()
> implementation.  Not gonna happen -- but...there is work going on to
try
> to rewrite IPC support for cygwin.  Search the cygwin-developer
archives
> for 'cygwin daemon'.

Chuck, you can use pthread_atfork() to have a function called in your
app when fork () is called. You could call that during shmattach, and
then when you callback is triggered increment nattch..

Rob


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