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Discover multiple processors programmatically?

Hi there,

Is there an API that would allow me to discover the availability of more then one physical processor cores? If so, is it somewhat standard -- would it work on say, Linux? I am parallelizing an application and would like to have two- and four-processor versions of some computationally intense code.

I found something about multiprocessing services on Apple's site http://developer.apple.com/documentation/Carbon/Conceptual/ Multitasking_MultiproServ/03tasks/chapter_3_section_1.html#// apple_ref/doc/uid/TP40000853-TP30000267-BABCEEHG but I wasn't able to use it.

Anyone know of such an API, particularly one that is someone platform- independent?

Thanks.

-- ivan

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