Re: C++ integration / DSEL alternative questions

[Moose <moose@...>]

Am 01.04.2014 12:01 schrieb steve donovan:
> It's the first thing any Lua person would do - if they want some
> initialization to happen once, then let require() do that job.
> 
> And I don't understand - the loading _will_ happen exactly once.

Yes, I was afraid that I didn't quite get my wording right.

The loading does happen once. Problem is the one who loads. Maybe I can paint it....

 
     UnitTestProgram    MyApplication
          |                |
          |                |
          +----------------´
          v
        links
          |
          v
        MyDLL ---- contains ----+--- code_invoking_lua()
          |                     |
          |                     +--- code_to_be_invoked_by_lua()
          |
          v
       executes code_invoking_lua()
          |
          |
          v
       LuaScript  
          |
          |
    "
    local ffi = require("ffi")
    ffi.cdef[[
      __declspec(dllexport) void code_to_be_invoked_by_lua();
    ]]

    -- does not work
    ffi.C.code_to_be_invoked_by_lua()

    -- works
    mydll = ffi.load('MyDLL')         <----- but MyDLL is present twice
    mydll.code_to_be_invoked_by_lua()
    "

So even if the scripts cache all that, the DLL is still duplicate. But maybe I just have to understand Lua better.

Cheers,
Moose