Embedding Python in a multi-threaded C++ application

[Jeff Epler]

Perhaps you can use PyErr_SetInterrupt() to create a KeyboardInterrupt
in the Python thread.

    void PyErr_SetInterrupt(    )
        This function simulates the effect of a SIGINT signal arriving
        -- the next time PyErr_CheckSignals() is called,
        KeyboardInterrupt will be raised. It may be called without
        holding the interpreter lock. 

There's no way to "clean up" after Python if you terminate its
thread---Python's datastructures could be in an inconsistent state, so
just releasing a lock wouldn't do you any good.

Jeff
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