Possible Duplicate:
Programmatically find the number of cores on a machine
I have a 3d game, and I am rebuilding its engine from scratch.
The new incarnation uses multi-threading to take advantage of multiple cores.
Does anyone know of a cross-platform(linux/win/mac) solution for querying the number of available cores?
Stackoverflow Archive:
Programmatically find the number of cores on a machine
Accepted Answer (from ceretullis) Includes Win32, Linux, MacOSX, etc.
If you're already using some API and/or library, it might have a solution. If not, you're left to coming up with something yourself.
C++ itself doesn't expose the concept of cores, so there is nothing in the language itself to help you. I don't think the standard libraries support such a check either.