Lua get and execute function from C

Question

If I have some lua code like this:

doSomething(function()
                print("Hello!")
            end)

How can I make it that, using the C API, I create C Lua function for doSomething that can then save the function passed to it to be executed a later date?

hroptatyr · Accepted Answer · 2011-04-05 23:05:35Z

3

It's just a normal entry on the stack. Check it with lua_isfunction() then use luaL_ref() to generate a reference (so that the garbage collector doesn't steal it), and then maybe lua_topointer() to store a pointer to this object, depends what you want to do with it.

When you're finished it's just a luaL_unref().

answered Apr 5, 2011 at 23:05

hroptatyr

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1 Comment

hroptatyr Over a year ago

Oh overlooked the later execute bit, that's just lua_call() but make sure you read the details under lua.org/manual/5.1/manual.html#lua_call

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