[Baypiggies] multithreading question
Shannon -jj Behrens
jjinux at gmail.com
Wed Sep 17 21:06:53 CEST 2008
On Wed, Sep 17, 2008 at 12:01 PM, Adam Hupp <adam at hupp.org> wrote:
> On Wed, Sep 17, 2008 at 11:40 AM, Shannon -jj Behrens <jjinux at gmail.com> wrote:
>> I'm using the queue module to coordinate a bunch of threads. Those
>> threads need to log a line to STDOUT. The line is short. Can I count
>> on the GIL to make sure that writing a single line to STDOUT is
>> atomic, or do I need to be more paranoid?
> Isn't the GIL dropped during any IO? In that case I don't think you
> can rely on it.
Python gives up the GIL. The C library goes to write the string. It
writes out only four bytes. A context switch occurs. Some other
thread does the same thing. Kaboom.
Seems plausible. Is it really as bad as that? Ugh.
Don't you wish you had a really clever sig like mine?
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