[Ffmpeg-devel] alsa input / output

Reimar Döffinger Reimar.Doeffinger
Sat Mar 24 20:46:57 CET 2007

On Sat, Mar 24, 2007 at 02:17:58PM -0500, Rich Felker wrote:
> as long as it's the lock-free thing, this sounds good! but is there
> really such a thing as lock-free in this age where broken cpus like
> ppc allow memory writes to take place in any order unless you insert
> mem barriers? (and gcc is too broken to insert mem barriers itself
> when you use the volatile keyword...)

Hm... is this really an issue? It can only be a problem with SMP or
multicore systems, and even there I would hope the write reordering only
concerns the main memory, not the caches and cache coherency...
Someone have details on what kind of reordering these CPUs are actually

Reimar D?ffinger

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