Re: mutexes, locks and so on...

[Matt Thomas <matt%3am-software.com@localhost>]

On Nov 12, 2010, at 9:24 AM, David Young wrote:

> On Thu, Nov 11, 2010 at 05:22:03PM +0100, Johnny Billquist wrote:
> *snip snip*
>> All others rely on the __HAVE_SIMPLE_MUTEXES
>> implementation, which utilize a CAS function. Obviously the VAX does
>> not have a CAS, and it is rather costly to simulate it, so I'm
>> working on getting away from this. (Does really all other platforms
>> have a CAS?)
> 
> Later in this thread you mention an MP-safe VAX instruction for
> manipulating linked-lists.  You cannot use that instruction in a clever
> way to provide atomic_cas_ptr() and atomic_swap_ptr() for rwlock(9) to
> use?

Nope.