[linux-audio-dev] userspace atomic primitives for multithread and SMP applications?

[Michael Ost]

I found some definitions in boost/detail/atomic_count.hpp, with gcc,
win32, etc. flavors. I still haven't figured out how they are used! But
at least there is source to play with.

- mo

On Mon, 2003-09-08 at 22:13, Jack O'Quin wrote:
> Michael Ost <most at museresearch.com> writes:
> 
> > I know this message is ancient, but if you are still looking for atomic
> > primitives I just ran across some in the boost code base. I can't figure
> > out how to use them (!) but perhaps you can? Boost, if you don't know,
> > seems to be kind of a proving ground for the C++ working group. Lots of
> > libraries which are cross platform and written by smart people. See
> > www.boost.org.
> > 
> > Hope this helps... mo
> > 
> > PS At least the code might provide some hints for how to implement
> > atomic primitives yourself. The code is open, but not GPLd.
> 
> Thanks for the pointer, mo.
> 
> Where are these primitives actually defined?  I found this in
> once.cpp...
> 
>   // The friendly form of InterlockedCompareExchange that defers
>   // according to the above function type wrappers.
>   inline LONG compare_exchange(volatile LPLONG dest, LONG exch, LONG cmp)
>   {
>       return ice_wrapper(&InterlockedCompareExchange, dest, exch, cmp);
>   }
> 
> But, I can't figure out where the ice_wrapper stuff is defined.  I
> suspect it may be the interesting part, some kind of machine-dependent
> layer.
> 
> Regards,
> -- 
>   Jack O'Quin
>   Austin, Texas, USA