_InterlockedCompareExchange provides compiler intrinsic support for the Win32 Platform SDK InterlockedCompareExchange function.
Note that the intrinsic form of this function has a leading underscore in the name. Also note that to generate the intrinsic expansion, you need to use /Oi. /Oi is implied with /O2.
To declare one of the interlocked functions for use as an intrinsic, the function must be declared with the leading underscore, and the new function must appear in a #pragma intrinsic statement. For convenience, the intrinsic versions of the functions may be declared in a #define statement to appear in the source code without the leading underscore.
For a sample of how to use _InterlockedCompareExchange, see _InterlockedDecrement.
END Microsoft Specific