Date: Mon, 24 May 2004 14:59:04 -0400 From: John Baldwin <jhb@FreeBSD.org> To: Daniel Eischen <eischen@vigrid.com> Cc: freebsd-arch@FreeBSD.org Subject: Re: atomic reference counting primatives. Message-ID: <200405241459.04503.jhb@FreeBSD.org> In-Reply-To: <Pine.GSO.4.10.10405241046510.10647-100000@pcnet5.pcnet.com> References: <Pine.GSO.4.10.10405241046510.10647-100000@pcnet5.pcnet.com>
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On Monday 24 May 2004 10:50 am, Daniel Eischen wrote: > On Mon, 24 May 2004, John Baldwin wrote: > > atomic_cmpset() is an "official" primitive. The problem is that Mike is > > using an enum and assuming that all enum's are ints which is not > > necessarily true. The code should perhaps use an int with #define's > > instead to guarantee that the variable is an int and not a short, char, > > or long. > > You can't use atomic_cmpset() in userland on 386, so > if it is being used in libthr, the machine must be > checked to make sure it will work, otherwise should > fall back to something else... I'd be fine with it being a compile option to be honest. We already don't support 80386's out of the box since they need a custom kernel. I'd rather not pessimize world + dog for the 80386. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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