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Can someone explain me the rationale behind having these two functions, instead of just one with the combined functionality?
Are there cases when these two are not used as a tight couple?
The reason to have distinct functions is, that aside from defining uniform parameters like the ones for page and cache,
CreateFileMapping()can be used to lock a file/range, which is larger than the available address space.MapViewOfFile()can then place and shift a sub range appropriately to make actual contents available in address space.