Re: [Quickfix-developers] Faster logons

[Dale W. <wil...@oc...>]

Oren Miller wrote:

> We actually do have a cross platform Event object that should do the 
> trick with a little modification: 
> http://cvs.sourceforge.net/viewcvs.py/quickfix/quickfix/src/C%2B%2B/Event.h?rev=1.4&view=markup 
> <http://cvs.sourceforge.net/viewcvs.py/quickfix/quickfix/src/C%2B%2B/Event.h?rev=1.4&view=markup>


Cool. You're ahead of us.

And in that case, I second Brian's suggestion about sleeping with a 
timeout. The session::login process could nudge the sleeping thread to 
say "Hey, look what I just did!"

Dale


>  
> It uses WaitForSingleObject and pthread_cond_timedwait.  It is 
> hardcoded to wait for 100 milliseconds.  If we just add a wait() 
> signature where we can pass in a value for the time, this class would 
> probably be perfect.
>  
> --oren
>
>     ----- Original Message -----
>     *From:* Dale Wilson <mailto:wil...@oc...>
>     *Cc:* qui...@li...
>     <mailto:qui...@li...>
>     *Sent:* Thursday, November 03, 2005 12:54 PM
>     *Subject:* Re: [Quickfix-developers] Faster logons
>
>     Brian Erst wrote:
>
>><SNIP>
>>I would also suggest that the use of process_sleep is a bad idea -
>>whenever I need to code a sleep-type function, I use a mutex and a
>>WaitForSingleObject with the sleep time as the timeout. That way, I can
>>interrupt the sleep (by triggering the mutex) if the reason for the
>>sleep has gone away (or so I don't have to wait 30 seconds to bring my
>>application down if I'm sleeping). Makes things much more responsive.
>>  
>>
>     An excellent idea with one very important drawback. 
>     WaitForSingleObject with a timeout is a WIN32 concept.
>     It is possible, but not necessarily easy, to code an equivalent
>     functionality on a posix system using |pthread_cond_timedwait.
>     If QuickFIX were going to use this technique someone would have to
>     beef up its cross-platform thread synchronization support.
>
>     Dale
>
>     |
>
>>- Brian Erst
>>Thynk Software, Inc.
>>
>>
>>  
>>
>     -- 
>
>-----------------------------------------------------
>  Dale Wilson, Senior Software Engineer
>  Object Computing, Inc. (OCI)
>  http://www.ociweb.com/  http://www.theaceorb.com/
>----------------------------------------------------
>


-- 
-----------------------------------------------------
  Dale Wilson, Senior Software Engineer
  Object Computing, Inc. (OCI)
  http://www.ociweb.com/  http://www.theaceorb.com/
----------------------------------------------------