Date: Wed, 10 Jul 2002 14:27:47 -0700 (PDT) From: Archie Cobbs <archie@dellroad.org> To: Terry Lambert <tlambert2@mindspring.com> Cc: Archie Cobbs <archie@dellroad.org>, John Baldwin <jhb@FreeBSD.org>, davidx@viasoft.com.cn, freebsd-arch@FreeBSD.org, julian@elischer.org Subject: Re: Timeout and SMP race Message-ID: <200207102127.g6ALRl329601@arch20m.dellroad.org> In-Reply-To: <3D2C9E8A.8D7657E7@mindspring.com> "from Terry Lambert at Jul 10, 2002 01:52:26 pm"
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Terry Lambert writes: > > FWIW, here is an API I've used before. This handles all race > > conditions and the 'other thread' question. > > I like this timer API. > > You need to add a timer_modify_interval (or something similar), so > that intervals can be changed without having to destroy and recreate > the timer, though, to avoid another potential race condition. There's no race condition there. You can just do this to 'reset' a timer: timer_cancel(&foo->timer); timer_start(&foo->timer, ...); Your timer_modify_interval() would just be an optimization of this. I forgot to mention that timer_cancel() does nothing if *handlep == NULL. -Archie __________________________________________________________________________ Archie Cobbs * Packet Design * http://www.packetdesign.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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