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Groups > comp.lang.python > #65770

Re: system wide mutex

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Asaf Las <roegltd@gmail.com>:

> Which one is most recommended to use for mutex alike locking to 
> achieve atomic access to single resource:
>
> - fcntl.lockf

I recommend fcntl.flock:

========================================================================
#!/usr/bin/python3

import sys, fcntl, time

with open("test.lock", "w+") as lock:
    fcntl.flock(lock.fileno(), fcntl.LOCK_EX)
    # begin critical
    sys.stdout.write("hello\n")
    time.sleep(3)
    sys.stdout.write("world\n")
    # end critical
========================================================================


Marko

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system wide mutex Asaf Las <roegltd@gmail.com> - 2014-02-09 02:39 -0800
  Re: system wide mutex Asaf Las <roegltd@gmail.com> - 2014-02-09 03:00 -0800
  Re: system wide mutex Skip Montanaro <skip@pobox.com> - 2014-02-09 05:00 -0600
    Re: system wide mutex Asaf Las <roegltd@gmail.com> - 2014-02-09 03:07 -0800
    Re: system wide mutex Roy Smith <roy@panix.com> - 2014-02-09 09:45 -0500
      Re: system wide mutex Skip Montanaro <skip@pobox.com> - 2014-02-09 09:40 -0600
      Re: system wide mutex Chris Angelico <rosuav@gmail.com> - 2014-02-10 09:09 +1100
  Re: system wide mutex Marko Rauhamaa <marko@pacujo.net> - 2014-02-09 18:14 +0200
    Re: system wide mutex Asaf Las <roegltd@gmail.com> - 2014-02-09 09:39 -0800
  Re: system wide mutex Grant Edwards <invalid@invalid.invalid> - 2014-02-10 17:00 +0000
  Re: system wide mutex Miki Tebeka <miki.tebeka@gmail.com> - 2014-02-10 09:46 -0800

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