Creating and resuming
coroutine.create makes a coroutine and coroutine.resume starts or continues it.
In this page:
Creating and resuming
coroutine.create takes a function and returns a suspended coroutine without running it. coroutine.resume(co, ...) starts it, passing the arguments to the function, and returns true plus any results, or false plus an error message. coroutine.status reports suspended, running, normal or dead.
Note:
Resuming a dead coroutine returns false and the message "cannot resume dead coroutine".
Example: Creating and resuming
local co = coroutine.create(function(a, b)
return a + b
end)
print(coroutine.status(co))
print(coroutine.resume(co, 3, 4))
print(coroutine.status(co))
print(coroutine.resume(co))
-- Output:
-- suspended
-- true 7
-- dead
-- false cannot resume dead coroutineLogin to try C/C++/Java/PHP code in the editor
Common Mistakes
- Forgetting to check the boolean that resume returns first
- Resuming a coroutine that is already dead
- Expecting create to run the function
Chapter Summary
- create returns a suspended coroutine
- resume returns true or false first
- status shows the state
- A finished coroutine is dead
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