[Python-Dev] Fwd: [ python-Patches-1744382 ] Read Write lock

[Jean-Paul Calderone]

On Fri, 6 Jul 2007 10:47:16 -0700, Mike Klaas <mike.klaas at gmail.com> wrote:
>On 6-Jul-07, at 6:45 AM, Yaakov Nemoy wrote:
>
>>
>> I can do the other three parts, but I am wondering, how do I write a
>> deterministic test unit for my patch?  How is it done with the
>> threading model in python in general?
>
>I don't know how it is done in general, but for reference, here are
>some of the unittests for my read/write lock class:
>
> [snip]
>
>         read.release()
>         self.assertEqual(wrlock.readerCount, 0)
>         time.sleep(.1)
>         self.assertTrue(writer.gotit)

Not exactly deterministic.  Instead of a flag attribute, try using an Event or
a Condition.  Either of these will let you know exactly when the necessary
operation has completed.

Jean-Paul