luabind/weak_ref.hpp

   1 // Copyright (c) 2004 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 #ifndef WEAK_REF_040402_HPP
  24 #define WEAK_REF_040402_HPP
  25
  26 #include <luabind/config.hpp>
  27
  28 struct lua_State;
  29
  30 namespace luabind {
  31
  32     class LUABIND_API weak_ref
  33     {
  34     public:
  35         weak_ref();
  36         weak_ref(lua_State* main, lua_State* L, int index);
  37         weak_ref(weak_ref const&);
  38         ~weak_ref();
  39
  40         weak_ref& operator=(weak_ref const&);
  41
  42         void swap(weak_ref&);
  43
  44                 // returns a unique id that no
  45                 // other weak ref will return
  46                 int id() const;
  47
  48         lua_State* state() const;
  49         void get(lua_State* L) const;
  50
  51     private:
  52         struct impl;
  53         impl* m_impl;
  54     };
  55
  56 } // namespace luabind
  57
  58 #endif // WEAK_REF_040402_HPP
  59