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how to map big size file (more than 2GB file) with MapViewOfFile api
Posted 1-Feb-13 3:20am
Comments
Sergey Alexandrovich Kryukov at 1-Feb-13 12:42pm
   
What did you try so far? Documentation is available, so what's the problem?
—SA

1 solution

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Solution 1

If you try to map at something other than a multiple of the allocation granularity, the mapping will fail and GetLastError will return ERROR_MAPPED_ALIGNMENT

From MSDN
To obtain the memory allocation granularity of the system, use the GetSystemInfo function, which fills in the members of a SYSTEM_INFO structure.

For files that are larger than the address space, you can only map a small portion of the file data at one time. When the first view is complete, you can unmap it and map a new view.

To obtain the size of a view, use the VirtualQuery function.
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Comments
H.Brydon at 2-Feb-13 2:27am
   
+5 for your answer...
sid2881986 at 2-Feb-13 4:12am
   
k....

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