Date: Wed, 27 Dec 1995 16:08:04 +0100 (MET) From: J Wunsch <j@uriah.heep.sax.de> To: m_tanaka@pa.yokogawa.co.jp (Mihoko Tanaka) Cc: freebsd-hackers@freebsd.org Subject: Re: samaphore remains Message-ID: <199512271508.QAA03532@uriah.heep.sax.de> In-Reply-To: <9512061002.AA16768@cabbage.pa.yokogawa.co.jp> from "Mihoko Tanaka" at Dec 6, 95 07:02:51 pm
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As Mihoko Tanaka wrote: > > I found the trouble that if a program using semaphore died > anbormally, the semaphore which was created remains on kernel. > I think it should be released by kernel's exit() function. Nope, it's an IPC facility, hence it should persist across the death of a process. > Although one of the UNIX implementation calls semexit() routine from > exit(), FreeBSD doesn't call semexit() from anywhere. > Is there any reason for this? You are right however, semexit() should be called from exit(), in order to have ``undo vectors'' processed. Thanks! -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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