luajit.cpp

chronolaw · chronolaw · commit 6f486ce53442 · 2020-03-18T17:39:46.000+08:00
diff --git a/section4/lua_shared.cpp b/section4/lua_shared.cpp
@@ -0,0 +1,17 @@
+// Copyright (c) 2020 by Chrono
+//
+// g++ lua_shared.cpp -std=c++11 -shared -fPIC -o lua_shared.so
+// g++ lua_shared.cpp -std=c++14 
+
+#include <luajit-2.1/luajit.h>
+
+extern "C" {
+
+int my_add(int a, int b);
+
+}
+
+int my_add(int a, int b)
+{
+    return a + b;
+}
diff --git a/section4/luajit.cpp b/section4/luajit.cpp
@@ -6,7 +6,7 @@
 
 #include <iostream>
 
-//#include "std.hpp"
+#include <luajit-2.1/luajit.h>
 
 int main()
 {
diff --git a/section4/shared.lua b/section4/shared.lua
@@ -0,0 +1,19 @@
+#!/usr/local/bin/luajit
+
+local ffi = require "ffi"
+
+local ffi_load = ffi.load
+local ffi_null = ffi.null
+local ffi_cdef = ffi.cdef
+local ffi_typeof = ffi.typeof
+local ffi_new = ffi.new
+local ffi_C = ffi.C
+
+ffi_cdef[[
+int my_add(int a, int b);
+]]
+
+local shared = ffi_load("./lua_shared.so")
+
+local x = shared.my_add(1, 2)
+print(x)
