Lua Coroutines

Lua coroutines enable cooperative multitasking by allowing code to yield control and resume later. Create coroutines with coroutine.create(), yield values with coroutine.yield(), and resume execution with coroutine.resume() to pass control between routines without preemption.

Yes. Wrap coroutines with coroutine.wrap() to create generators that yield values on demand. This pattern powers iterators that produce sequences lazily, enabling memory-efficient iteration over large datasets or infinite streams.

Producer-consumer patterns leverage coroutines to decouple data generation from consumption. Producers yield items via coroutine.yield(); consumers resume producers to fetch data. This enables bidirectional communication and synchronization between coroutines.

Monitor coroutine state with coroutine.status(), which returns 'running', 'suspended', 'normal', or 'dead'. Wrap coroutine.resume() calls to catch errors and implement robust error-handling workflows that propagate failures across coroutine boundaries.

Coroutines can simulate asynchronous I/O by yielding during blocking operations and resuming when data arrives. This creates the appearance of non-blocking execution within a single thread, useful for stateful workflows without true parallelism.

No. Coroutines are built into Lua's standard library and require no external dependencies. They work in any Lua environment—game engines, embedded systems, or standalone scripts—enabling cooperative multitasking without additional tooling.