Roo: A Framework for Real-Time Threads

Tradi t ional object-oriented real-time sy s t ems are oft e n l imited in that t h e y provide only one approach t o real-time object support. Taking the increasing dem a n d for flexible and extensible object support environmen t s i n t o account, we discuss the design and imp lemen ta t ion of a smal l object-oriented real-time execut ive based o n a sub-framework which we call Roo. Roo is a component of t he T igger f ramework (our proposal for a n extensible object support operating sy s t em) and i s intended t o support different object models provading soft real-time behaviour. Roo provides support for different mechan i sms and policies for real-time thread managemen t , scheduling and synchronization. In th i s it serves as a basis for other components of the Tagger f ramework .