Active Oberon

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Active Oberon

Paradigms	Imperative, structured, modular, object-oriented, concurrent
Family	Wirth Oberon
Designed by	Niklaus Wirth, Jürg Gutknecht, Patrik Reali, A. Radenski
Developer	ETH Zurich
First appeared	1998; 23 years ago (1998)
Typing discipline	Strong, hybrid (static and dynamic)
Scope	Lexical
Implementation language	Oberon
Platform	IA-32AMD64
Influenced by
Oberon, Object Oberon, Oberon-2

Active Oberon is a general purpose programming language developed during 1996-1998 by the group around Niklaus Wirth and Jürg Gutknecht at the Swiss Federal Institute of Technology in Zürich (ETH Zurich). It is an extension of the programming language Oberon.^[1] The extensions aim at implementing active objects as expressions for parallelism. Compared to its predecessors, Oberon and Oberon-2, Active Oberon adds objects (with object-centered access protection and local activity control), system-guarded assertions, preemptive priority scheduling and a changed syntax for methods (named type-bound procedures in Oberon vocabulary). Objects may be active, which means that they may be threads or processes. The operating system named Active Object System (AOS) in 2002,^[2] then due to trademark issues, renamed Bluebottle in 2005, and then renamed A2 in 2008, especially the kernel, synchronizes and coordinates different active objects.

Unlike Java or C#, objects may be synchronized not only with signals but directly on conditions. This simplifies concurrent programs and their development.

An Active Oberon fork is the language Zonnon.

See also[]

• A2 (operating system)

References[]

External links[]

• Language Report
• A2 Quick Start Guide