| Re: [AD] user-defined events |
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On Friday 17 October 2008, Peter Wang wrote:
> On 2008-10-17, Thomas Fjellstrom <tfjellstrom@xxxxxxxxxx> wrote:
> > On Friday 17 October 2008, Peter Wang wrote:
> > > On 2008-10-17, Elias Pschernig <elias.pschernig@xxxxxxxxxx> wrote:
> > > > That works just as good of course. I don't particulary like the
> > > > malloc in al_emit_user_event, but it shouldn't really matter. And I
> > > > wonder what to do about __sync_fetch_and_add and __sync_sub_and_fetch
> > > > for MSVC..
> > >
> > > Something like this.
> > >
> > > Peter
> >
> > Are we sure this will work with multi core/cpu machines? I'm not sure it
> > will, but I could be confusing that stuff with something else.
>
> That's the whole point of using atomic ops. Although it's true I
> haven't stress tested it on a multi-core machine yet (or at all).
Not entirely. The main point is to lock stuff between processes and threads
afaik. So nothing can happen between the separate events. having more than one
cpu changes things a bit, now multiple things CAN happen at once, each cpu can
even call one of those functions at the same time. Are those asm ops system
global locks? or just cpu local?
> Peter
>
>
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--
Thomas Fjellstrom
tfjellstrom@xxxxxxxxxx