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Date: Mon, 23 Apr 2001 20:31:41 -0400
From: Christopher Faylor <cgf AT redhat DOT com>
To: Robert Collins <robert DOT collins AT itdomain DOT com DOT au>
Cc: John Fortin <fortinj AT attglobal DOT net>, cygwin-developers AT cygwin DOT com
Subject: Re: Looking for something to work on...
Message-ID: <20010423203141.A2151@redhat.com>
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Mail-Followup-To: Robert Collins <robert DOT collins AT itdomain DOT com DOT au>,
	John Fortin <fortinj AT attglobal DOT net>, cygwin-developers AT cygwin DOT com
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In-Reply-To: <EA18B9FA0FE4194AA2B4CDB91F73C0EF79C7@itdomain002.itdomain.net.au>; from robert.collins@itdomain.com.au on Tue, Apr 24, 2001 at 10:20:10AM +1000

On Tue, Apr 24, 2001 at 10:20:10AM +1000, Robert Collins wrote:
>> I guess we should move this discussion to cygwin-developers...
>> 
>> John was asking for something interesting to do.  He suggested POSIX
>> IPC stuff, which I (possibly erroneously) assumed was the same as what
>> cygipc provided.
>
>It is. See http://www.opengroup.org/onlinepubs/7908799/xsh/ipc.html -
>it's essential sysV IPC. To some extent these are equivalent to mmap and
>the like, but I don't think mmap is cross process-persistent in cygwin
>(And I don't know if it's meant to be). We could of course implement shm
>with disk backing not VM backing, but that might cause issues with Gb
>allocs :]

I could actually donate some Windows code that I wrote a few years ago
to emulate sys v semaphores.  It wasn't complete but it might be useful
as either a starting point or a laughing point.

cgf