Date: Tue, 03 Oct 2000 01:19:02 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: Jan Mikkelsen <janm@transactionsite.com> Cc: Kevin Mills <kmills@aventail.com>, FreeBSD Hackers <freebsd-hackers@FreeBSD.org> Subject: Re: atomic operations Message-ID: <XFMail.001003011902.jhb@FreeBSD.org> In-Reply-To: <001201c02d0f$790c9140$0901a8c0@haym.transactionsite.com>
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On 03-Oct-00 Jan Mikkelsen wrote: > John Baldwin <jhb@FreeBSD.org> wrote: >>Uh, there is no xaddl instruction in the x86 instruction set. > > It was introduced in the '486. I've been using it for some years now, so I > am confident of its existence. Freaky. Time for a new atomic op perhaps. > There shouldn't be a need for a loop like the one you describe for a simple > atomic increment. The trick is that I want to increment and read at the same time. > I'm pretty new to FreeBSD: what is changing in -current which alters the > behaviour of your code? atomic_cmpset_* don't exist in stable, they are part of SMPng. > Jan Mikkelsen -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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