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Groups > comp.lang.python > #81913

Re: time.monotonic() roll over

From Marko Rauhamaa <marko@pacujo.net>
Newsgroups comp.lang.python
Subject Re: time.monotonic() roll over
Date 2014-12-04 17:50 +0200
Organization A noiseless patient Spider
Message-ID <87vblr8lcw.fsf@elektro.pacujo.net> (permalink)
References <54807cfd$0$2311$426a74cc@news.free.fr>

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"ast" <nomail@invalid.com>:

> Does any body know when time.monotonic() rolls over ?

Never, according to the documentation you linked.

Admittedly, the documentation confuses the reader by chatting about some
irrelevant internal Windows details.

Also, the tone of the documentation raises a suspicion that this code
might return a bad value on Windows:

    def fifty_days():
        a = time.monotonic()
        time.sleep(50 * 24 * 3600)
        return time.monotonic() - a

That is, the internal integer wrap is not guarded against between the
calls to time.monotonic(), maybe.


Marko

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Thread

time.monotonic() roll over "ast" <nomail@invalid.com> - 2014-12-04 16:25 +0100
  Re: time.monotonic() roll over Marko Rauhamaa <marko@pacujo.net> - 2014-12-04 17:50 +0200
    Re: time.monotonic() roll over Ian Kelly <ian.g.kelly@gmail.com> - 2014-12-04 09:05 -0700
      Re: time.monotonic() roll over Marko Rauhamaa <marko@pacujo.net> - 2014-12-04 18:21 +0200
        Re: time.monotonic() roll over Chris Angelico <rosuav@gmail.com> - 2014-12-05 03:27 +1100
          Re: time.monotonic() roll over Marko Rauhamaa <marko@pacujo.net> - 2014-12-04 20:09 +0200
            Re: time.monotonic() roll over Chris Angelico <rosuav@gmail.com> - 2014-12-05 05:29 +1100
              Re: time.monotonic() roll over Marko Rauhamaa <marko@pacujo.net> - 2014-12-04 20:44 +0200
                Re: time.monotonic() roll over Chris Angelico <rosuav@gmail.com> - 2014-12-05 07:02 +1100
            Re: time.monotonic() roll over Ian Kelly <ian.g.kelly@gmail.com> - 2014-12-04 12:29 -0700
            Re: time.monotonic() roll over Akira Li <4kir4.1i@gmail.com> - 2014-12-04 23:24 +0300
            Re: time.monotonic() roll over Chris Angelico <rosuav@gmail.com> - 2014-12-05 07:33 +1100
              Re: time.monotonic() roll over Marko Rauhamaa <marko@pacujo.net> - 2014-12-04 22:51 +0200
            Re: time.monotonic() roll over Ian Kelly <ian.g.kelly@gmail.com> - 2014-12-04 15:17 -0700
              Re: time.monotonic() roll over Marko Rauhamaa <marko@pacujo.net> - 2014-12-05 00:44 +0200
                Re: time.monotonic() roll over Ian Kelly <ian.g.kelly@gmail.com> - 2014-12-05 10:04 -0700
                Re: time.monotonic() roll over Marko Rauhamaa <marko@pacujo.net> - 2014-12-05 20:48 +0200
            Re: time.monotonic() roll over Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-12-05 11:39 +1100
              Re: time.monotonic() roll over Dave Angel <davea@davea.name> - 2014-12-04 20:21 -0500
                Re: time.monotonic() roll over Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-12-05 13:54 +1100
                Re: time.monotonic() roll over Dave Angel <davea@davea.name> - 2014-12-05 00:29 -0500
                Re: time.monotonic() roll over Lele Gaifax <lele@metapensiero.it> - 2014-12-05 08:56 +0100
                Re: time.monotonic() roll over Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-12-05 21:09 +1100
                Re: time.monotonic() roll over Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-12-05 12:12 -0500
              Re: time.monotonic() roll over Marko Rauhamaa <marko@pacujo.net> - 2014-12-05 08:17 +0200
                Re: time.monotonic() roll over Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-12-05 12:31 -0500
              Re: time.monotonic() roll over Akira Li <4kir4.1i@gmail.com> - 2014-12-05 12:48 +0300
    Re: time.monotonic() roll over Chris Angelico <rosuav@gmail.com> - 2014-12-05 03:12 +1100
    Re: time.monotonic() roll over random832@fastmail.us - 2014-12-04 11:51 -0500
  Re: time.monotonic() roll over Nobody <nobody@nowhere.invalid> - 2014-12-05 00:54 +0000

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