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Of cross-platform. Apache Portable Runtime

Published June 18th, 2008 in Uncategorized

The Apache Portable Runtime (APR) is a supporting library for the Apache web server. It provides a set of APIs that map to the underlying operating system. Where the OS doesn’t support a particular function, APR will provide a replacement. Thus, the APR can be used to make a program truly portable across platforms.

APR was originally a part of Apache, but has now been spun off into a separate project of the Apache Software Foundation, and is used by other applications to achieve platform independence.

The range of platform-independent functionality provided by APR includes:

  • Memory allocation and memory pool functionality
  • Atomic operations
  • Dynamic library handling
  • File I/O
  • Command argument parsing
  • Locking
  • Hash tables and arrays
  • Mmap functionality
  • Network sockets and protocols
  • Thread, process and mutex functionality
  • Shared memory functionality
  • Time routines
  • User and group ID services


Installation

A very simple tutorial that explains how to compile and install Apache Portable Runtime (apr) on Linux can be found here.


Similar projects

  • Glib provides similar functionality. It supports many more data structures and OS-independent functions, but fewer IPC-related functions (local and global locking, dynamic loading, or shared memory management are not provided).
  • NSPR is a cross-platform abstraction library used by the Mozilla project. It is used by another subproject of Mozilla XPFE to provide cross-platform graphical user interface (GUI) functionality.
  • Adaptive Communication Environment (ACE) is an object-oriented library written in C++ similar in functionality to APR. It is widely deployed in commercial products.
  • WxWidgets is an object-oriented cross-platform GUI library that also provides abstraction classes for database communication, IPC and networking functionality.
  • Qt is a cross-platform application development framework with similar features and can also be used for GUI development.
  • SDL is a cross-platform abstraction library for multimedia applications and computer games that provides features such as 2D graphics, timers, sound, joystick and CD-ROM access.


External links

  • The APR website
  • The current APR programming documentation
  • The Apache Software Foundation website
  • APR tutorial

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