Write Lua extensions so files and invoke method instances under Linux

Source: Internet
Author: User
Tags lua

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))

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