Same as the _InterlockedCompareExchange_acq function except that
  those parts of the algorithm that are marked "Atomic" are performed
  by the cmpxchg4.rel instruction with release ordering semantics;
  that is, the memory read/write is made visible after all previous
  memory accesses of the Destination by other processors.

  Syntax:

       unsigned __int64 _InterlockedCompareExchange_rel (volatile
       unsigned int *Destination, unsigned __int64 Newval, unsigned
       __int64 Comparand);