From owner-freebsd-current  Wed Apr  8 04:57:00 1998
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	Wed, 8 Apr 1998 07:53:59 -0400 (EDT)
From: Peter Dufault <dufault@hda.com>
Message-Id: <199804081153.HAA02444@hda.hda.com>
Subject: Re: kernel support for memory semaphores/locks...
In-Reply-To: <199804072257.RAA26476@detlev.UUCP> from Joel Ray Holveck at "Apr 7, 98 05:57:15 pm"
To: joelh@gnu.org
Date: Wed, 8 Apr 1998 07:53:59 -0400 (EDT)
Cc: current@FreeBSD.ORG
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> >> No, you'd go to sleep for a jiffy and check again...  I belive a
> >> yield() syscall is in the pipeline or maybe already in.
> > Yield is in the kernel.
> 
> Is yield() the same as sleep(0)?

No, in that the behavior is standard.  "man sched_yield" on current.
At least for now you need:

options        "P1003_1B"
options        "_KPOSIX_PRIORITY_SCHEDULING"

Peter

-- 
Peter Dufault (dufault@hda.com)   Realtime development, Machine control,
HD Associates, Inc.               Safety critical systems, Agency approval

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