, though we are rather fond of them for obvious reasons.
Submitted by tcurtis on Sun, 07/18/2010 - 23:07
This has been an uneventful week in my GSoC work.
Parrot's 2.6 release is Tuesday, and I've taken on the task of updating Squaak to modern NQP-rx prior to it. Because of that and my GSoC midterm evaluations, I haven't spent much time hacking on Tree::Pattern or on optimizations using it this week. I plan to finish working on Squaak tonight or tomorrow, commit my fixes to trunk, and finally get back to work on my GSoC project. I'm a little behind schedule now because of that, but I plan to work hard on optimization for the rest of GSoC.
Submitted by Chandon on Thu, 07/15/2010 - 00:32
Now that I have pre-emptive task switching between green threads basically working, I need to figure out what the API to interact with them wants to look like. Additionally, I need to clean up this scheduler thing that I've mauled in order to make the API and terminology consistent.
Submitted by tcurtis on Mon, 07/12/2010 - 06:15
My main goals this week have been getting a tail-call elimination optimization to work in NQP-rx and moving my GSoC project to an external repository to make it easier for other projects to use it. Both of these goals have been successful. You can find the tail-call elimination optimization here. My GSoC project can now be found on github or installed via Plumage with ./plumage install tree-optimizations.
Submitted by tcurtis on Sun, 07/04/2010 - 09:52
Last week, I generalized PAST::Pattern to Tree::Pattern. This week, I put that to use.
Submitted by Chandon on Thu, 07/01/2010 - 21:24
I've spent my Parrot time for the last week working on something I call Alarms. Alarms are like Timers, except instead of specifying a delay the user specifies when they want the Alarm to fire. This is a pretty simple concept. If the Scheduler did what I wanted, I'd be done long ago.
Submitted by darbelo on Tue, 06/29/2010 - 18:56
After taking some time off GSoC work to pay the parrot Upgrade Tax that plumage had accumulated in the months since 2.3 shipped, and watching the World Cup this hasn't been an awfully productive week, code-wise. However, there's been quite a bit of work and planing done anyway.
Submitted by tcurtis on Sun, 06/27/2010 - 08:48
Earlier this summer, when I was considering what sort of interface would be best for the PAST pattern matching and transformation I've been building, Bacek suggested an XPath-like syntax. XPath is, nominally, a language for pattern matching on XML, but it is applicable to any tree-like data structure where each node may have both attributes and children. It's a general-purpose tree-matching language.
Submitted by Chandon on Tue, 06/22/2010 - 21:00
In my work on Timers, I've concluded that the scheduler really is the right place for scheduling things (who would have guessed?). How the scheduler *should* work is described in pdd25. How the scheduler actually works is a bit different, and how I want the scheduler to work to implement green threads is a bit different from that...
Submitted by tcurtis on Fri, 06/18/2010 - 07:10
In my previous post, I described in tutorial form how to implement a very simple constant folding optimization for Integer addition. In this very brief post, I describe in greater detail how that optimization works.
Submitted by Chandon on Tue, 06/15/2010 - 21:30
The next step in green threads is to make them preemptive: after one thread has run for a while, it needs to be stopped so a waiting thread can have a turn. Parrot has a mechanism for doing things after a set time called Timers which would be perfect for this. Unfortunately, they don't really work.