Protothreads: simplifying event-driven programming of memory-constrained embedded systems
Proceedings of the 4th international conference on Embedded networked sensor systems
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Protothreads are stackless lightweight threads that provide a mechanism for concurrent programming with very low overhead in any environment that supports an ANSI-C compiler. No processor-specific task switching code is required to implement them. In their published form they are not quite adequate for a priority-based based scheduler and thus are of questionable utility in an embedded system with real-time requirements. This article discusses the protothread library along with modifications and an example priority-based scheduler that may be of some utility in embedded systems environments lacking an RTOS.