function lua_async.yield()
	await(Promise(function(resolve)
		setImmediate(resolve)
	end))
end

function lua_async.sleep(ms)
	await(Promise(function(resolve)
		setTimeout(resolve, ms)
	end))
end

function lua_async.kill_thread()
	coroutine.yield(true)
end

function lua_async.resume(co)
	local status, err = coroutine.resume(co)

	if coroutine.status(co) == "dead" or err then
		lua_async.limiting.unset_limit(co)
	end

	if not status then
		error("Error (in async function): " .. err)
	end
end

function lua_async.run()
	local last_time = os.clock()

	while true do
		local current_time = os.clock()
		local dtime = current_time - last_time
		last_time = current_time

		lua_async.step(dtime)
	end
end