How to detect and quick a lua function taking too long to respond?

Question

I'm using Corona SDK to make a simple app that requires luasocket. Corona SDK support luasocket to do async http req.

But I want to use UDP from luasocket. UDP receive() method from luasocket is blocking until it receives a message.

Corona SDK doesn't support LuaLanes. So it's quite impossible to listen udp message in another thread.

So I'm just thinking if there's any method/trick/workaround in lua to detect and cancel if a function, in this case udp.receive(), is taking too long to respond?

Thanks in advance

score 3 · Answer 1 · answered Jun 29 '11 at 06:33

Yes.. Coroutines and events.. http://www.lua.org/pil/9.4.html

Fire a timer event that say calls a function every 100msec.. In that function resume a coroutine..

In the coroutine. You can read the incoming data in a loop and yield if not complete.

The example explains this well..

Good luck.. F.

score 2 · Accepted Answer · answered Jun 22 '11 at 09:18

2

Have you set the upd timeout?

See http://w3.impa.br/~diego/software/luasocket/udp.html at the bottom of the page.

answered Jun 22 '11 at 09:18

Jane T

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you could use this timeout and some coroutine based wrapper to do other things in the mean time. – jpjacobs Jun 22 '11 at 09:52

How to detect and quick a lua function taking too long to respond?

2 Answers2