KeyboardInterrupt from syscalls

[Fredrik Lundh]

Fredrik Tolf wrote:

> So how does it work? Does my code get to return Py_FALSE, and the
> interpreter ignores it, seeing that an exception is set? Is a non-local
> exit performed right over my call stack (in which case my next question
> would be how to clean up resources being used from my C code)? Or does
> something completely else happen?

the signal handler adds an entry to a "pending calls" queue, which is 
checked by the interpreter at regular intervals.

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