close() function in Lua’s coroutine module is employed to gracefully terminate a coroutine and release its associated resources.
It yields a boolean value,
true, if the coroutine has been successfully closed, otherwise it returns
close()function is used to explicitly release resources associated with a coroutine, making it safe to close coroutines that have finished their execution.
- Attempting to close a running coroutine or a coroutine that has already been closed will result in an error.
- Always check the return values of
coroutine.close()to handle potential errors appropriately.
This example uses the
close() function to terminate a running coroutine.
local function myCoroutine()print("Coroutine is running")coroutine.yield()print("Coroutine has resumed")endlocal co = coroutine.create(myCoroutine)coroutine.resume(co) -- Start the coroutinelocal success, error_message = coroutine.close(co)print("Closing coroutine:", success, error_message)
The output is:
Coroutine is runningClosing coroutine: true nil
This example creates a coroutine using
coroutine.create(), starts it with
coroutine.resume(), and then closes it with
local function manageCoroutine()local co = coroutine.create(function ()print("Coroutine is running")coroutine.yield()print("Coroutine has resumed")end)coroutine.resume(co) -- Start the coroutinelocal success, error_message = coroutine.close(co)if success thenprint("Coroutine closed successfully")elseprint("Error while closing coroutine:", error_message)endendmanageCoroutine()
This will output:
Coroutine is runningCoroutine closed successfully