src/open.cpp

   1 // Copyright (c) 2003 Daniel Wallin and Arvid Norberg
   2
   3 // Permission is hereby granted, free of charge, to any person obtaining a
   4 // copy of this software and associated documentation files (the "Software"),
   5 // to deal in the Software without restriction, including without limitation
   6 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   7 // and/or sell copies of the Software, and to permit persons to whom the
   8 // Software is furnished to do so, subject to the following conditions:
   9
  10 // The above copyright notice and this permission notice shall be included
  11 // in all copies or substantial portions of the Software.
  12
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
  14 // ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
  15 // TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
  16 // PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
  17 // SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
  18 // ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  19 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
  21 // OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23 #define LUABIND_BUILDING
  24
  25 #include <luabind/lua_include.hpp>
  26
  27 #include <luabind/luabind.hpp>
  28 #include <luabind/function.hpp>
  29
  30 namespace luabind {
  31
  32 namespace
  33 {
  34
  35   int make_property(lua_State* L)
  36   {
  37       int args = lua_gettop(L);
  38
  39       if (args == 0 || args > 2)
  40       {
  41           lua_pushstring(L, "make_property() called with wrong number of arguments.");
  42           lua_error(L);
  43       }
  44
  45       if (args == 1)
  46           lua_pushnil(L);
  47
  48       lua_pushcclosure(L, &detail::property_tag, 2);
  49       return 1;
  50   }
  51
  52 } // namespace unnamed
  53
  54     void open(lua_State* L)
  55     {
  56         // get the global class registry, or create one if it doesn't exist
  57         // (it's global within a lua state)
  58         detail::class_registry* r = 0;
  59
  60         // If you hit this assert it's because you have called luabind::open()
  61         // twice on the same lua_State.
  62         assert((detail::class_registry::get_registry(L) == 0)
  63             && "you cannot call luabind::open() twice");
  64
  65         lua_pushstring(L, "__luabind_classes");
  66         r = static_cast<detail::class_registry*>(
  67             lua_newuserdata(L, sizeof(detail::class_registry)));
  68
  69         // set gc metatable
  70         lua_newtable(L);
  71         lua_pushstring(L, "__gc");
  72         lua_pushcclosure(
  73             L
  74           , detail::garbage_collector_s<
  75                 detail::class_registry
  76             >::apply
  77           , 0);
  78
  79         lua_settable(L, -3);
  80         lua_setmetatable(L, -2);
  81
  82         new(r) detail::class_registry(L);
  83         lua_settable(L, LUA_REGISTRYINDEX);
  84
  85         // TODO this leaks.
  86         lua_pushstring(L, "__luabind_class_id_map");
  87         void* classes_storage = lua_newuserdata(L, sizeof(detail::class_id_map));
  88         detail::class_id_map* class_ids = new (classes_storage) detail::class_id_map;
  89         (void)class_ids;
  90         lua_settable(L, LUA_REGISTRYINDEX);
  91
  92         lua_pushstring(L, "__luabind_cast_graph");
  93         void* cast_graph_storage = lua_newuserdata(
  94             L, sizeof(detail::cast_graph));
  95         detail::cast_graph* graph = new (cast_graph_storage) detail::cast_graph;
  96         (void)graph;
  97         lua_settable(L, LUA_REGISTRYINDEX);
  98
  99         lua_pushstring(L, "__luabind_class_map");
 100         void* class_map_storage = lua_newuserdata(
 101             L, sizeof(detail::class_map));
 102         detail::class_map* classes = new (class_map_storage) detail::class_map;
 103         (void)classes;
 104         lua_settable(L, LUA_REGISTRYINDEX);
 105
 106         // add functions (class, cast etc...)
 107         lua_pushstring(L, "class");
 108         lua_pushcclosure(L, detail::create_class::stage1, 0);
 109         lua_settable(L, LUA_GLOBALSINDEX);
 110
 111         lua_pushstring(L, "property");
 112         lua_pushcclosure(L, &make_property, 0);
 113         lua_settable(L, LUA_GLOBALSINDEX);
 114     }
 115
 116 } // namespace luabind
 117