Date: Tue, 09 Jun 2009 08:26:23 +0100 From: Bruce Simpson <bms@incunabulum.net> To: Vlad Galu <dudu@dudu.ro> Cc: freebsd-stable@freebsd.org, Ivan Voras <ivoras@freebsd.org> Subject: Re: Unnamed POSIX shared semaphores Message-ID: <4A2E0E9F.8050708@incunabulum.net> In-Reply-To: <ad79ad6b0906082336s7253da7ey691cd46f00b684a0@mail.gmail.com> References: <ad79ad6b0906010833y20042080td1ebe0d3bfffbdc5@mail.gmail.com> <20090601161903.GA40377@stack.nl> <4A24457C.6060100@FreeBSD.org> <200906020842.42330.jhb@freebsd.org> <h0j1qa$umk$1@ger.gmane.org> <ad79ad6b0906082336s7253da7ey691cd46f00b684a0@mail.gmail.com>
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Vlad Galu wrote: > ... > Thanks, Ivan. I'll take a better look at this after our first release, > which is due in a couple of weeks. Right now the team efforts aren't > focused on portability, so it's a low priority issue, but something > we'd definitely like to have in the future. > I stand corrected. Having read around this, I don't see how process-shared sems could work at all, although I haven't actually tried running process-shared sem code. POSIX semaphores were however horribly broken in kernel prior to 7.2. The fix was essentially one liner. We got a very good test case from a chap in a GNATS PR. cheers BMS
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