Date: Thu, 26 Jul 2001 15:08:36 -0700 From: Arun Sharma <arun@sharmas.dhs.org> To: John Baldwin <jhb@FreeBSD.org> Cc: hackers@FreeBSD.org Subject: Re: Need a clean room implementation of this function Message-ID: <20010726150836.C23264@sharmas.dhs.org> In-Reply-To: <XFMail.010726144324.jhb@FreeBSD.org>; from jhb@FreeBSD.org on Thu, Jul 26, 2001 at 02:43:24PM -0700 References: <20010726135913.A23052@sharmas.dhs.org> <XFMail.010726144324.jhb@FreeBSD.org>
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On Thu, Jul 26, 2001 at 02:43:24PM -0700, John Baldwin wrote:
> {
> int val;
>
> do {
> val = *(int *)addr;
> } while (atomic_cmpset_int(addr, val, val | (1 << nr) == 0);
> return (val & (1 << nr));
> }
Thanks! I think that'd work. But code using BTS would be
more efficient (fewer cycles).
Many people asked me this question: the code I'm porting is:
http://www.intel.com/research/mrl/orp/
Please see my messages to java@freebsd.org about the port.
-Arun
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