O'Reilly Open Source Convention - August 1-5, 2005 - Portland, Oregon
 Convention Coverage


Inside Ponie, the Bridge from Perl 5 to Perl 6
Nicholas Clark, Fotango

Track: Perl
Date: Thursday, August 4th, 2005
Time: 2:35pm - 3:20pm
Location: Portland 256

At its heart Perl 5 is a stack based virtual machine using reference counting to manage memory. Parrot is about as different as you can get--a register based virtual machine using mark and sweep to garbage collect memory. The intent of Ponie is to provide an upgrade path to Perl 6, by enabling existing CPAN modules to be used unchanged with parrot. To do this means taking the Perl 5 implementation and making the minimum changes possible to make it work atop Parrot.

The substantial differences between the internal architectures mean there is already a large gap to bridge. Add to this the fact that Perl 5 has almost no abstraction of the internal structures for extensions to use, and you realise that many of the most important modules on CPAN are calling APIs which assume a very Perl 5 like system. Then remember that Perl 5's reference counting gives timely destruction of objects, which lots of code relies on, and you start to realise that emulating all this on Parrot is no easy task.

Come to this talk to see just how Ponie is going about providing an emulation of the Perl 5 behaviour that XS code expects. The explanation of the systematic differences between the two architectures will teach you things you never knew about how Perl 5 works, give you insights into writing better code for interfacing to Perl 5, and show how to target Parrot natively in the near future.

Diamond Sponsors

Computer Associates International Inc., (CA)
Hewlett Packard
Sun Microsystems

Platinum Sponsors

Novell, Inc.

Gold Sponsors


Silver Sponsors

Black Duck Software
Covalent Technologies
GroundWork Open Source Solutions
Intel Corporation
Mergere, Inc.
Yahoo! Inc.
Zend Technologies, Inc.

Media Sponsors

boing boing
C/C++ Users Journal
DevtownStation News
Digital ID World
Enterprise Open Source Journal
Free Software Magazine
InsideMac Radio
Integration Developer News
Linux Journal
Open Enterprise Trends
Software Association of Oregon
Version Tracker
Wi-Fi Technology Forum
Women's Technology Cluster

In-Kind Sponsors

Dell Inc.
Griffin Technology
Harman Multimedia


OSCON 2005 Sponsor Opportunities — Email us at

Download the OSCON 05 Sponsor/Exhibitor Prospectus

OSCON 2005 Media Sponsor Opportunities — Call Margi Levin at 707-827-7184 or email at

Press and Media

For media-related inquiries, contact Suzanne Axtell at

Conference News

Want to receive conference news? Sign up for our email newsletter.

O'Reilly Home | Privacy Policy

© 2005, O'Reilly Media, Inc.