lua_timer

Use

local os = require ('os')
local timer = require ('timer')
local function co3()
 print("coroutine3 start",os.clock())
 timer.sleep(5.5)
 print("coroutine3 5.5 second later",os.clock())
 print("coroutine3 end")
end
--coroutine style timer
timer.async(function()
 print("coroutine1 start",os.time())
 timer.sleep(2)
 print("coroutine1 2 second later",os.time())
 timer.async(co3)
 print("coroutine1 end")
end)
timer.async(function()
 print("coroutine2 start",os.time())
 timer.sleep(1)
 print("coroutine2 1 second later",os.time())
 timer.sleep(1)
 print("coroutine2 1 second later ",os.time())
 timer.sleep(1)
 print("coroutine2 1 second later ",os.time())
 timer.sleep(1)
 print("coroutine2 1 second later ",os.time() )
 print("coroutine2 end")
end)
--callback style timer
local stime = os.time()
timer.timeout(1.5,function()
 print("timer expired", os.time() - stime)
end)
--remove a timer
local ctx = timer.timeout(5,function()
 error("this timer shoud not expired")
end)
timer.remove(ctx)
print("main thread noblock")
while true do
 timer.update()
end