ResumeFunktionen

ResumeFunktionen is a term used in computer science to describe the set of functions that continue the execution of a previously paused or suspended computation. They are a central concept in coroutine, generator, and cooperative multitasking paradigms, where code can yield control and later be resumed from the same point.

A resume function typically continues a suspended unit of work from its last suspension point. It may accept an input value that is delivered to the paused computation, and it returns the next produced value or a signal that the computation has finished. In many implementations the resume operation can also propagate exceptions into the suspended task to handle errors at the point of resumption. The lifecycle generally includes creation, suspension, resumption, and completion.

Across programming languages, resume-like operations appear under different names but share the same idea. In C++20 coroutines, the resume method on a coroutine handle restarts the suspended function. In Python, generators are resumed by calling next() or send(value). JavaScript resumes generators with next() on the iterator, while async runtimes manage resumption implicitly after awaited operations. In Kotlin and other coroutine libraries, continuations expose a resume method used by the scheduler to continue execution.

Key considerations for implementing or using ResumeFunktionen include state preservation, stack management (stackful vs. stackless), concurrency and data race avoidance, and robust error handling or cancellation. They enable asynchronous programming patterns, iterative pipelines, and responsive event-driven systems by allowing long-running tasks to pause and continue without blocking.

See also: Coroutines, Generators, Continuations, Yield, Async/Await.