Processes, threads, green threads, protothreads, fibers, coroutines: what's the difference?

Question

I\'m reading up on concurrency. I\'ve got a bit over my head with terms that have confusingly similar definitions. Namely:

• Processes
• Threads
• \"

Answer 1

Protothreads are great when implementing sequential state machines. Protothreads are not really threads at all, but rather a syntax abstraction that makes it much easier to write a switch/case state machine that has to switch states sequentially (from one to the next etc..).

I have used protothreads to implement asynchronous io: http://martinschroder.se/asynchronous-io-using-protothreads/