shared.lua

chronolaw · chronolaw · commit ee100ef6d198 · 2020-03-19T13:14:16.000+08:00
diff --git a/section4/lua_shared.cpp b/section4/lua_shared.cpp
@@ -7,6 +7,7 @@
 
 extern "C" {
 
+int num = 10;
 int my_add(int a, int b);
 
 }
diff --git a/section4/shared.lua b/section4/shared.lua
@@ -10,6 +10,7 @@ local ffi_new = ffi.new
 local ffi_C = ffi.C
 
 ffi_cdef[[
+int num;
 int my_add(int a, int b);
 ]]
 
@@ -20,5 +21,7 @@ print(jit.status())
 
 local shared = ffi_load("./liblua_shared.so")
 
+print(shared.num)
+
 local x = shared.my_add(1, 2)
 print(x)
