Why doesn't InterlockedCompareExchange return changed value?

StackOverflow https://stackoverflow.com/questions/8426375

سؤال 

LONG __cdecl InterlockedCompareExchange(
  __inout  LONG volatile *Destination,
  __in     LONG Exchange,
  __in     LONG Comparand
);

Return value
The function returns the initial value of the Destination parameter.

Just curious.
Why does InterlockedCompareExchange return initial value? Is there a reason that they designed so?

لا يوجد حل صحيح

مرخصة بموجب: CC-BY-SA مع الإسناد
لا تنتمي إلى StackOverflow
scroll top