coroutine.yield (···) Suspends the execution of the calling coroutine. Any arguments to yield are passed as extra results to resume.

coroutine.wrap (f) Creates a new coroutine, with body f. f must be a function. Returns a function that resumes the coroutine each time it is called.

coroutine.status (co) Returns the status of coroutine co, as a string: "running", if the coroutine is running (that is, it called status);

coroutine.resume (co [, val1, ···]) Starts or continues the execution of coroutine co. The first time you resume a coroutine, it starts running its body. The values

coroutine.create (f) Creates a new coroutine, with body f. f must be a function. Returns this new coroutine, an object with type "thread"

coroutine.running () Returns the running coroutine plus a boolean, true when the running coroutine is the main one.

coroutine.isyieldable () Returns true when the running coroutine can yield. A running coroutine is yieldable if it is not the main thread and it is not inside a non-yieldable