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Re: [v3] c++0x <mutex> and <condition_variable>

-- Chris,

I think that in principle <mutex> and <condition_variable> should be available also when __GTHREADS is undefined, that is plain single thread, in a trivial form of course (see for example ext/concurrence.h). Can you imagine anything smart here, better than sprinkling tons of #if __GTHREADS everywhere? If we can do that, we have also to adjust [GLIBCXX_CHECK_GTHREADS] to immediately succeed as soon as __GTHREADS is undefined.

Much lower priority than <thread>, to be clear ;)

Paolo.

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