Abstract
A method for extending programming languages with timing constructs is proposed. It enables the specification of timing constraints in programs. The approach is not language specific and the extension can be included in many existing programming languages. With the extension it is possible to write real-time program components that can be proven correct independently of the properties of the machine that is used for their execution. It therefore provides a similar abstraction from the execution platform as is normal in non-real-time programming. The presented approach distinguishes two phases in system construction: (1) a platform-independent programming phase that includes the expression of timing requirements, and (2) an implementation phase where all platform dependencies are addressed. The latter only differs from a normal compilation in the sense that a feasible schedule must be found to execute the program.
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