I'm trying to embed LuaJIT into a C application. The code is like this:
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
#include <stdlib.h>
#include <stdio.h>
int barfunc(int foo)
{
/* a dummy function to test with FFI */
return foo + 1;
}
int
main(void)
{
int status, result;
lua_State *L;
L = luaL_newstate();
luaL_openlibs(L);
/* Load the file containing the script we are going to run */
status = luaL_loadfile(L, "hello.lua");
if (status) {
fprintf(stderr, "Couldn't load file: %s\n", lua_tostring(L, -1));
exit(1);
}
/* Ask Lua to run our little script */
result = lua_pcall(L, 0, LUA_MULTRET, 0);
if (result) {
fprintf(stderr, "Failed to run script: %s\n", lua_tostring(L, -1));
exit(1);
}
lua_close(L); /* Cya, Lua */
return 0;
}
the Lua code is like this:
-- Test FFI
local ffi = require("ffi")
ffi.cdef[[
int barfunc(int foo);
]]
local barreturn = ffi.C.barfunc(253)
io.write(barreturn)
io.write('\n')
It reports error like this:
Failed to run script: hello.lua:6: cannot resolve symbol 'barfunc'.
I've searched around and found that there're really little document on the ffi module. Thanks a lot.
ffi library requires luajit, so you must run lua code with luajit. From the doc: "The FFI library is tightly integrated into LuaJIT (it's not available as a separate module)".
How to embed luajit? Look here http://luajit.org/install.html under "Embedding LuaJIT"
Under mingw your example run if i add
__declspec(dllexport) int barfunc(int foo)
at the barfunc function.
Under Windows luajit is linked as a dll.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With