Write Lua extensions so files and invoke method instances under Linux

This article mainly introduced under Linux to write LUA extensions so file and Invoke method instance, this article gives the C language code, compile so file, Lua call code instance, need friends can refer to the following

The code is as follows:

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include "Lua.h"

#include "Lualib.h"

#include "Lauxlib.h"

/* The front declaration of the open function of the library * *

int Luaopen_mylib (lua_state *l);

static int L_sin (Lua_state *l)

{

Double d = Lual_checknumber (L, 1);

Lua_pushnumber (L, sin (d));

printf ("OK now luahook!n");

return 1; /* Number of results * *

}

static const Lual_reg mylib[] =

{

{"Lsin", L_sin},

{NULL, NULL}/* must end with NULL/*

};

int Luaopen_mylib (lua_state *l)

{

Luai_openlib (L, "Mylib", Mylib, 0);

return 1;

}

If you are a. cpp file, be sure to add extern "C" to the Luaopen_mylib, or the exported function will be renamed, remember

Compiling: gcc mylibs.c-fpic-shared-o Libmylib.so-llua

The code is as follows:

Makefile file

CXX =GCC

Libname:=libmylib.so

Hdrname:=mylibs.c

Targetname:=mylibs

cname:=$ (Patsubst%,%.c,$ (TARGETNAME))

oname:=$ (Patsubst%,%.o,$ (TARGETNAME))

All:libmylib

Libmylib: $ (oname)

$ (CXX)-g-shared-wl,$ (libname)

-O $ (libname) $ (oname)-llua

%.O:%.c

$ (CXX)-fpic-c-wall $ (CNAME) clean:$ (RM) *.o *.so

Lua invokes the script:

The code is as follows:

Local one, two, three = Package.loadlib ("libmylib.so", "Luaopen_mylib") ()

Print (Mylib.lsin (10))