Hi,
I have now committed a patch to our reference counter that will make reference
counting thread safe.
As far as I could test or have testers, this patch uses gcc's or MSVC's atomic
compiler intrinsics for that task. IMO that is actually the least intrusive
way to ensure thread safety. I hope that these compilers also know much about
that builtin functions to do some optimizations with them.
For *all* other architectures this falls back to using mutexes which is quite
heavyweight for that task. That means it will work, but probably not really
fast.
I believe that I have covered the most important architectures/compilers with
win32 and gcc i386/x86_64. But the next important ones from my point of view
are the ppc/macos X and the IRIX versions.
I believe that these also have some intrinsics or assembly instructions that
guarantee atomic changes to an (unsigned) int value, but I have no macos
machine present.
So If anybody knows how to do that for his favourite architecture, feel free
to provide patches/check that in ...
Greetings
Mathias
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