Is it possible to access a memory-mapped file in a C++ program to the page file from MATLAB?

I am trying to use the MEMMAPFILE function to open an anonymous C++ memory map in MATLAB, but am unable to do so. I am using 'CreateFileMapping' (from the Microsoft Windows API) to keep the memory map out of the file system and in the page file instead. There is a mapping object that has a name and lives in memory, but no actual disk file.

'CreateFileMapping' is an operating system function that is documented on the MSDN website at:

 <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/memory/base/createfilemapping.asp>

At the bottom of that page, there is an example named 'Creating Named Shared Memory' that my code is closely modeled on. A direct link to that example is:

 <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/memory/base/creating_named_shared_memory.asp>

I would like to access this memory map from MATLAB.

Answer 1

[MathWorks Support Team]

The ability to read or write to an anonymous memory map in the page file is not available in MATLAB.

MATLAB functions for memory mapping are limited to MEMMAPFILE. MEMMAPFILE maps a saved disk file and cannot be used to access an anonymous memory map in the page file.