En Thu, 26 Feb 2009 16:17:42 -0200, Maxim Khitrov <mkhit...@gmail.com>
escribió:
I'm looking for a function in the standard library or pywin32 package
that will block until a certain condition is met or it is interrupted
by Ctrl-C. For example, time.sleep() would have been perfect for my
needs if thread.interrupt_main() could interrupt the call from another
thread in the same way that Ctrl-C does. Unfortunately, that is not
the case.
Another thing I tried was creating a pipe with os.pipe() and issuing a
read call on it. The event to exit was a single byte written to the
other end of the pipe, but Ctrl-C could not interrupt the read call.
The threading.Event class does not work for me, because it uses short
sleep intervals for timed waits. I need the reaction to be as close to
instant as possible, something like this will not do:
while not <some condition is met>:
sleep(0.01)
I actually replaced threading.Event with my own version that uses
native Windows events, and waits on those also cannot be interrupted
by Ctrl-C. I'm trying to achieve the same effect as that while loop
and I don't care what the condition to exit is, but the loop needs to
exit as soon as the condition is met without waiting for up to X
additional milliseconds. Any ideas?
You may try MsgWaitForMultipleObjects - send a message to the main thread
from the other thread.
An alertable wait (like SleepEx) plus QueueUserAPC should work, I presume,
but I've never actually tried in Python.
--
Gabriel Genellina
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