c++ - The usage of _InterlockedCompareExchange64 -

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on msdn, see 

interlockedcompareexchange64

requires parameters 64 aligned,

but 

_interlockedcompareexchange64

i see no such requirement alignment, , mentioned provide compiler intrinsic support interlockedcompareexchange64.

so, means can use _interlockedcompareexchange64 without caring alignment? 'cause don't quite know alignment means here.

i'm pretty documentation mistake, rather direct difference between 2 function - seeing result in same cmpxchg8b instruction. [assuming of course looking it atomic on smp system - it's pretty specialized instruction, doubt has other use].


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