Re: Need some help to use TFUNCTION

[Brigham Toskin <brighamtoskin@...>]

You use the API function lua_call and its cousins to call a function you have on the stack. As far as saving it in C land, I don't think you can export it across the API barrier; someone please correct me if I'm wrong. If you do need a persistent handle to it for future use, what you can do is put it in the registry (basically a globally-available table for use by clients of the Lua API).

On Tue, Jun 2, 2015 at 4:26 PM, Laurent FAILLIE <l_faillie@yahoo.com> wrote:

Hello,

I'm working on a C programs using Lua as embedded language.

At Lua side, I'm defining a table on witch a filed need to be a function as :

_, err = Broker:subscribe {

        { topic = "/tata", function = myfunc },

        { topic = "tutu", function = func2 }

}

And I know at C side I have to look up for TFUNCTION for "function" field.

My reading function is creating a structure containing

- a string, the topic,

- and a "reference" or something to keep track of the function

now my question :

1/ How can I store TFUNCTION at C side ?

2/ How my C code can "call" this Lua function ?

If it's not so clear, please have a look on my code here : https://github.com/destroyedlolo/Selene/blob/master/src/MQTT.c

especially on line 79.

Thanks

Laurent

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