new macro 'lua_checkversion' to check whether core and application are

compatible

1 files changed, 11 insertions, 1 deletions

diff --git a/lapi.c b/lapi.c
index 9af75b17..86b591c4 100644
--- a/lapi.c
+++ b/lapi.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.c,v 2.67 2008/07/04 18:27:11 roberto Exp roberto $
+** $Id: lapi.c,v 2.68 2008/08/01 17:01:16 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
@@ -121,6 +121,16 @@ LUA_API lua_CFunction lua_atpanic (lua_State *L, lua_CFunction panicf) {
 }
 
 
+LUA_API void lua_checkversion_ (lua_State *L, int version) {
+  lua_lock(L);
+  if (version != LUA_VERSION_NUM)
+    luaG_runerror(L, "application and Lua core using different Lua versions");
+  if (G(L)->nilobjp != luaO_nilobject)
+    luaG_runerror(L, "application using two incompatible Lua VMs");
+  lua_unlock(L);
+}
+
+
 
 /*
 ** basic stack manipulation