atomic reference counting primatives.

[John Baldwin]

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 at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org