General Development Archive

"Hoard is a scalable memory allocator (malloc replacement) for multithreaded applications. Hoard can dramatically improve your application's performance on multiprocessor machines. No changes to your source are necessary; just link it in. Hoard scales linearly up to at least 14 processors. The supported platforms include Linux, Solaris, and Windows NT/2000/XP."

GCC 4.2 has been released. The biggest feature in this release is OpenMP support in C, C++ and Fortran. See the changes page for more details.

"When you're designing and developing new software systems, it is often hard to see how all the pieces are suppose to fit together. Unified Modeling Language is one tool that allow developers and architects to ease the process and create a big picture before committing to a particular technology."

"The recently released 1.0.106 version of Libferris includes initial support for mounting Web photo services as a filesystem. This means that sites such as 23hq.com and flickr.com can be seen as filesystems, which allows users to upload digital pictures easily by using the cp(1) or ferriscp(1) tool with a destination of 23hq://username/upload."

Adobe Systems plans to open-source Flex, its development framework for building Flash and Apollo-based applications. The company on Wednesday is expected to announce the move, which will start when it releases a beta of the next version of Flex, code-named Moxie, in June.

There is an interesting but rarely mentioned technique in a C++ context: signature-based polymorphism, a more permissive variation of subtype polymorphism, usually called duck typing. Two objects having nothing in common can share an implicit interface and be commonly manipulated by such an interface with no inheritance involved. Part I and Part II. Also, making use of SIMD units such as MMX, SSE, or AltiVec is usually a tradeoff of portability for speed. Recent versions of GCC include an extension that allows you to write vector code without sacrificing portability. Take a look at how to use it.

In the article High Availability with Open Source, Josh Kuo looks at three of the popular Open Source projects to implement High Availability redundancy (failover): Heartbeat, keepalived, and CARP. The article talks about where each of these three excels and some implementation ideas. Josh also mentions the DRBD utility to sync two remote filesystems to aid in an advanced High Availability setup.

The POWER5 processor is a 64-bit workhorse used in a variety of settings. Starting with this introduction to assembly language concepts and the PowerPC instruction set, this series of articles introduces assembly language in general and specifically for the POWER5. Read more for links to all the parts in the series.

"Nearly thirty years of growth haven't exhausted the potential of the REstructured eXtended eXecutor language. The first of the widely used 'scripting' languages continues to expand its capabilities and platform range, and it makes for a particularly good match with AIX."

John Backus, whose development of the Fortran programming language in the 1950s changed how people interacted with computers and paved the way for modern software, has died. He was 82. Backus died Saturday in Ashland, Oregon, according to IBM, where he spent his career. Prior to Fortran, computers had to be meticulously 'hand-coded' - programmed in the raw strings of digits that triggered actions inside the machine. Fortran was a 'high-level' programming language because it abstracted that work - it let programmers enter commands in a more intuitive system, which the computer would translate into machine code on its own.

"Sometimes GCC emits something that can be described as Haiku poems - and you have no clue as to what it really is complaining about. This page is a collection of such gems, their meaning in English and how to solve the problem."

This first article of a three-part series introduces PHP5's XML implementation and help those relatively new to using XML with PHP to read, parse, and manipulate, and write a short and uncomplicated XML file using the DOM and SimpleXML in a PHP environment.

"Are you confused by the plethora of testing and comparison options in the Bash shell? This tip helps you demystify the various types of file, arithmetic, and string tests so you will always know when to use test, , ], (( )), or if-then-else constructs."

The open source, freely available, stable read/write NTFS driver, NTFS-3G 1.0 has just been released. The driver, released half year ago for beta testing, made progress, thanks to ten or even hundreds of thousands testers, early adopters, and developers. In consequence of the open communications and positive experiences, NTFS-3G is available for over 60 Linux distributions today, including most major ones. Moreover it was ported to new operating systems like FreeBSD, BeOS, Haiku, and Mac OS X.