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Date:	Mon, 27 Jan 2003 09:03:34 +0100
From:	Thomas Pfaff <tpfaff AT gmx DOT net>
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To:	Elliot Mednick <elliot AT cadence DOT com>
CC:	cygwin AT cygwin DOT com
Subject:	Re: Mmap and semaphores?
References:	<B64C24D6DF7BF040BAF59B923D06180B3FEFC8 AT exmbx01chel DOT cadence DOT com>
In-Reply-To:	<B64C24D6DF7BF040BAF59B923D06180B3FEFC8@exmbx01chel.cadence.com>

Please check the sem_init return code first.
Cygwin does not support process shared semaphores at the moment.

Thomas

Elliot Mednick wrote:
> Hello,
> 
> I'm try to write a client server application that used shared memory and
> asemaphores.  Appended is a simple test case.  It works under Solaris
> using the -lposix4 library.  But it doesn't work under Cygwin.  Given
> the lack of any otherquestions about this, I imagine that I'm doing
> something wrong, or it's functionality is limited.
> 
> The server maps a file as shared, inits a semaphore, then waits.  The
> client, which you start after the server waits, shares the same file
> (this part works) and attempts to post the semaphore.  The server ought
> to -- but doesn't -- wake up.  It does in Solaris.


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