Date: Thu, 26 Jul 2001 23:59:27 +0200 From: Bernd Walter <ticso@mail.cicely.de> To: Arun Sharma <arun@sharmas.dhs.org> Cc: Bernd Walter <ticso@mail.cicely.de>, hackers@FreeBSD.ORG Subject: Re: Need a clean room implementation of this function Message-ID: <20010726235927.B2249@cicely20.cicely.de> In-Reply-To: <20010726142106.A23171@sharmas.dhs.org>; from arun@sharmas.dhs.org on Thu, Jul 26, 2001 at 02:21:06PM -0700 References: <20010726135913.A23052@sharmas.dhs.org> <20010726231540.A2249@cicely20.cicely.de> <20010726142106.A23171@sharmas.dhs.org>
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On Thu, Jul 26, 2001 at 02:21:06PM -0700, Arun Sharma wrote: > On Thu, Jul 26, 2001 at 11:15:40PM +0200, Bernd Walter wrote: > > > static __inline__ int test_and_set_bit(int nr, volatile void * addr); > > > > -current has a lot of atomic functions in src/sys/i386/include/atomic.h. > > It has byte, word, int, long level operations - what I want is bit > level. You must have missing something. My version reads the following: [...] ATOMIC_ASM(set, char, "orb %b2,%0", v) ATOMIC_ASM(clear, char, "andb %b2,%0", ~v) [...] -- B.Walter COSMO-Project http://www.cosmo-project.de ticso@cicely.de Usergroup info@cosmo-project.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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