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From: Patrick S. <ps...@ci...> - 2009-07-27 09:03:22
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On Fri, 24 Jul 2009, Patrick Smears wrote: > On Fri, 24 Jul 2009, Julian Seward wrote: > >> >>> anyone change it between comparing it to A and setting it to B). Because >>> of the way Valgrind works (simulating instructions), the atomic >>> instructions get broken up into separate loads/stores, meaning that >>> they're no longer atomic (i.e. it's possible for someone to change the >>> location in question after it was compared to register A, but before it >>> was set to register B). >> >> That's fixed now, in the trunk (not 3.4.x). If you put in atomic >> instructions then you should get out (something equivalent to) >> atomic instructions. So V should now play nice with other processes >> communicating via shared memory. I have tried this out and it works well - great :-) Patrick |