From a1480ef7d88ff82bc4e04e564463fe1ac9856889 Mon Sep 17 00:00:00 2001
From: Julien Danjou <julien@danjou.info>
Date: Thu, 9 Apr 2009 10:57:00 +0200
Subject: [PATCH] luaobject: import

Signed-off-by: Julien Danjou <julien@danjou.info>
---
 common/luaobject.h | 87 ++++++++++++++++++++++++++++++++++++++++++++++
 luaa.h             | 12 +------
 2 files changed, 88 insertions(+), 11 deletions(-)
 create mode 100644 common/luaobject.h

diff --git a/common/luaobject.h b/common/luaobject.h
new file mode 100644
index 00000000..bbd65bc6
--- /dev/null
+++ b/common/luaobject.h
@@ -0,0 +1,87 @@
+/*
+ * luaobject.h - useful functions for handling Lua objects
+ *
+ * Copyright © 2009 Julien Danjou <julien@danjou.info>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef AWESOME_COMMON_LUAOBJECT
+#define AWESOME_COMMON_LUAOBJECT
+
+#include <lauxlib.h>
+#include "common/array.h"
+
+/** Type for Lua references */
+typedef int luaA_ref;
+
+static inline int
+luaA_settype(lua_State *L, const char *type)
+{
+    luaL_getmetatable(L, type);
+    lua_setmetatable(L, -2);
+    return 1;
+}
+
+DO_ARRAY(luaA_ref, luaA_ref, DO_NOTHING)
+
+#define LUA_OBJECT_FUNCS(type, prefix, lua_type)                               \
+    static inline type *                                                       \
+    prefix##_new(lua_State *L)                                                 \
+    {                                                                          \
+        type *p = lua_newuserdata(L, sizeof(type));                            \
+        p_clear(p, 1);                                                         \
+        luaA_settype(L, lua_type);                                             \
+        return p;                                                              \
+    }                                                                          \
+                                                                               \
+    static inline int                                                          \
+    prefix##_push(lua_State *L, type *item)                                    \
+    {                                                                          \
+        if(item)                                                               \
+        {                                                                      \
+            assert(item->refs.len);                                            \
+            lua_rawgeti(L, LUA_REGISTRYINDEX, item->refs.tab[0]);              \
+        }                                                                      \
+        else                                                                   \
+            lua_pushnil(L);                                                    \
+        return 1;                                                              \
+    }                                                                          \
+                                                                               \
+    static inline type *                                                       \
+    prefix##_ref(lua_State *L)                                                 \
+    {                                                                          \
+        if(lua_isnil(L, -1))                                                   \
+            return NULL;                                                       \
+        type *item = luaL_checkudata(L, -1, lua_type);                         \
+        luaA_ref_array_append(&item->refs, luaL_ref(L, LUA_REGISTRYINDEX));    \
+        return item;                                                           \
+    }                                                                          \
+                                                                               \
+    static inline void                                                         \
+    prefix##_unref(lua_State *L, type *item)                                   \
+    {                                                                          \
+        if(item)                                                               \
+        {                                                                      \
+            assert(items->refs.len);                                           \
+            luaL_unref(L, LUA_REGISTRYINDEX, item->refs.tab[0]);               \
+            luaA_ref_array_take(&item->refs, 0);                               \
+        }                                                                      \
+    }
+
+#endif
+
+// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
diff --git a/luaa.h b/luaa.h
index 9f6f1fee..8efa082e 100644
--- a/luaa.h
+++ b/luaa.h
@@ -33,9 +33,7 @@
 
 #include "draw.h"
 #include "common/util.h"
-
-/** Type for Lua function */
-typedef int luaA_ref;
+#include "common/luaobject.h"
 
 #define luaA_deprecate(L, repl) \
     luaA_warn(L, "%s: This function is deprecated and will be removed, see %s", \
@@ -218,14 +216,6 @@ luaA_getopt_boolean(lua_State *L, int idx, const char *name, bool def)
     return b;
 }
 
-static inline int
-luaA_settype(lua_State *L, const char *type)
-{
-    luaL_getmetatable(L, type);
-    lua_setmetatable(L, -2);
-    return 1;
-}
-
 /** Push a area type to a table on stack.
  * \param L The Lua VM state.
  * \param geometry The area geometry to push.