Is OSCompareAndSwap (Mac OS X) equivalent to CMPXCHG8B?
Is OSCompareAndSwap (Mac OS X) equivalent to CMPXCHG8B?
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You can find the definition of the atomic functions in the OSAtomic.s file in the XNU source. For example, here's OSAtomicCompareAndSwapPtr for x86_64 in version 1486.2.11: