[LUAJit> Creating a DLL for use with FFI

[Kaj Eijlers <bizziboi@...>]

Hi,

I'm playing around with LUAJit 2.0 and loving it so far. The FFI is amazing, but being a C programmer I wanted to try to at least create and bind a DLL of my own.

 

But...even my simplest attempt fails...sure I get the DLL and would believe I did the right thing:

It compiles find and creates the DLL (code at the end of the message).

 

However, I am obviously missing something with this because:

 

local ffi  = require( "ffi" )

local libb = ffi.load("dlltest.dll")
print(libb)

ffi.cdef[[
 void printMe(void);
]]

libb.printMe()

yields:

userdata[0x0027d948]

luajit32: glfw-triangle.lua:10: cannot resolve symbol 'printMe': The specified p
rocedure could not be found.

stack traceback:
        [C]: in function '__index'
        glfw-triangle.lua:10: in main chunk
        [C]: ?

 

Which kinda suggests my symbol was not exported correctly by me.

 

Environment x86/MSVC/Win7

 

Anybody have any pointers? DLL tutorials don't seem to mention much more than 'use dllexport'.

 

Thanks,

Kaj

 

--------------------------------------------------------------------- 

// DLLTest.cpp : Defines the exported functions for the DLL application.

//

#include

"stdafx.h"

#include

<stdio.h>

__declspec

(dllexport) void printMe( void )

{

printf(

"Hello\n");

}