[issue2240] setitimer, getitimer wrapper

[Georg Brandl]

Georg Brandl added the comment:

Patch review:
* ItimerError should be signal.ItimerError, not signal.error.
* It should probably inherit from EnvironmentError or IOError.
* itimer_retval will leak the new tuple if one of the PyFloat_FromDouble
fails.
* Do you have test and doc patches, too?
* What does the "which" argument mean, is it an arbitrary integer
identifying the timer?

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nosy: +georg.brandl

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