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Re: Fw: [patch] Make std::tr1::shared_ptr thread-safe.

Alexander Terekhov wrote:

On Apr 2, 2005 12:33 AM, Paolo Carlini <pcarlini@suse.de> wrote: 
Thanks Jonathan! If nobody finds even more subtle problems ;),
tomorrow morning I will regtest it on a couple different
multiprocessor machines.


Itanic stuff that was posted here contained nothing having anything
to do with memory syncronization AFAICS. The rest of exchange_and_add()
stuff was totally busted (WRT reference counting and msync) as well.

I can't read IA64 but the disassembly looks like __exchange_and_add without the intrinsic inlined; it just shuffles registers around and calls something else. It doesn't even have an add instruction. It's as if the compiler didn't recognize the instrinsic. Could this be caused by a missing #include <ia64intrin.h>? Or perhaps the intrinsic has generated an out of line function that Paolo didn't show us?

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