[Patches] [ python-Patches-1564547 ] Py_signal_pipe

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Patches item #1564547, was opened at 2006-09-24 15:13
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Category: Core (C code)
Group: Python 2.6
Status: Open
Resolution: None
Priority: 5
Submitted By: Gustavo J. A. M. Carneiro (gustavo)
Assigned to: Nobody/Anonymous (nobody)
Summary: Py_signal_pipe

Initial Comment:
Problem: how to wakeup extension modules running poll()
so that they can let python check for signals.

Solution: use a pipe to communicate between signal
handlers and main thread.  The read end of the pipe can
then be monitored by poll/select for input events and
wake up poll().  As a side benefit, it avoids the usage
of Py_AddPendingCall / Py_MakePendingCalls, which are
patently not "async safe".

All explained in this thread:

http://mail.python.org/pipermail/python-dev/2006-September/068569.html


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