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## async
thread.async(function(res))
despite the name, this function provides a new state running under a new thread. coroutines would be more what you are looking for for async
the argument function is executed by the thread until it has been completed. the res paramater is a function that takes any number of arguments and sets them as the value for the thread:await() call, and kills the thread (safely)
the reason for the res function it because lua_call (in the c api) requires a number or return values before you run the function
the res function also provides some child methods for thread managment
### res:testclose
res:testclose()
closes the thread if it is being requested to close from async:close
### res:autoclose
res:autoclose()
calls res:testclose() every lua line, using a debug hook
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### async:await
async:await()
pauses the current thread until the selected thread exits, or calls res(), the return value is whatever the thread passed to res
### async:kill
async:kill()
kills the thread, this may close it in an unsafe way, and should be avoided
### async:close
async:close()
waits for the thread to internally call res:testclose or exit
### async:clean
async:clean()
calls the __gc metamethod, will call async:kill() if it is still running
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