[Stackless] Newbie question

Jay Shaffstall jshaffstall at gmail.com
Thu Sep 4 16:34:13 CEST 2008

On Thu, Sep 4, 2008 at 9:59 AM, Richard Tew <richard.m.tew at gmail.com> wrote:
> On Wed, Sep 3, 2008 at 4:08 PM, Jay Shaffstall <jshaffstall at gmail.com> wrote:
>> I'd thought that each tasklet would run once, round robin style, with
>> all others getting run once before the first ran again.  A tasklet
>> that tried to receive on an empty channel would block, and when
>> another tasklet sent to that channel the first would unblock and go
>> back into the round robin queue.
>> Am I misunderstanding how stackless works?  Because what I think I'm
>> seeing is that the receiving tasklet runs immediately.  I don't have
>> any call to stackless.run, but as soon as I call send on a channel,
>> the receiving tasklet runs, rather than having the send queue up until
>> the tasklet is next up to run.
> This behaviour is defined by the 'preference' attribute of the channel:
>>>> help(stackless.channel.preference)
> Help on getset descriptor __builtin__.channel.preference:
> preference
>    -1 prefer receiver (default), 1 prefer sender, 0 don't
>    prefer anything. See also schedule_all
> You probably want to set it to 1 for your channel.

Thanks, Richard!  I'll give that a try and see how it works.


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