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Author vstinner
Recipients anacrolix, neologix, pitrou, python-dev, rhettinger, tasslehoff, vstinner
Date 2012-04-05.11:29:23
SpamBayes Score -1.0
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Message-id <1333625364.26.0.965631004509.issue14222@psf.upfronthosting.co.za>
In-reply-to
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> Why do you think monotonic time is needed for the Queue module?

The duration of a timeout of N seconds should be N seconds even if the system clock is updated (e.g. a daylight saving time (DST) change).

This feature is checked by an unit test in the patch attached to the isuse #14428 (implementation of the PEP 418):

+    def test_monotonic_settime(self):
+        t1 = time.monotonic()
+        realtime = time.clock_gettime(time.CLOCK_REALTIME)
+        # jump backward with an offset of 1 hour
+        time.clock_settime(time.CLOCK_REALTIME, realtime - 3600)
+        t2 = time.monotonic()
+        time.clock_settime(time.CLOCK_REALTIME, realtime)
+        # monotonic must not be affected by system clock updates
+        self.assertGreaterEqual(t2, t1)

You can imagine a similar patch for Queue timeout.
History
Date User Action Args
2012-04-05 11:29:24vstinnersetrecipients: + vstinner, rhettinger, pitrou, anacrolix, neologix, python-dev, tasslehoff
2012-04-05 11:29:24vstinnersetmessageid: <1333625364.26.0.965631004509.issue14222@psf.upfronthosting.co.za>
2012-04-05 11:29:23vstinnerlinkissue14222 messages
2012-04-05 11:29:23vstinnercreate