Limit RAM Usage to a CPP application

I have 3 GB RAM. Is there a way to allocate only 512MB of R开发者_StackOverflow中文版AM to a C++ application?

Else

Is there a way to reduce my RAM to 512MB for a while for testing purpose?

Thanks, Ashok

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Use SetProcessWorkingSetSize()

Sets the minimum and maximum working set sizes for the specified process.