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adopt_policy.hpp - Hosted on DriveHQ Cloud IT Platform
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Ruta de la carpeta: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\luabind\luabind\adopt_policy.hpp
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// Copyright (c) 2003 Daniel Wallin and Arvid Norberg // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // The above copyright notice and this permission notice shall be included // in all copies or substantial portions of the Software. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF // ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED // TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A // PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT // SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR // ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE // OR OTHER DEALINGS IN THE SOFTWARE. #ifndef LUABIND_ADOPT_POLICY_HPP_INCLUDED #define LUABIND_ADOPT_POLICY_HPP_INCLUDED #include
#include
#include
#include
#include
namespace luabind { namespace detail { template
struct adopt_pointer { typedef boost::mpl::bool_
is_value_converter; typedef adopt_pointer type; template
T* apply(lua_State* L, by_pointer
, int index) { // preconditions: // lua_isuserdata(L, index); // getmetatable().__lua_class is true // object_rep->flags() & object_rep::constant == 0 int offset = 0; object_rep* obj = static_cast
(lua_touserdata(L, index)); assert((obj != 0) && "internal error, please report"); const class_rep* crep = obj->crep(); int steps = implicit_cast(crep, LUABIND_TYPEID(T), offset); (void)steps; assert((steps >= 0) && "adopt_pointer used with type that cannot be converted"); obj->remove_ownership(); T* ptr = reinterpret_cast
(obj->ptr(offset)); return ptr; } template
static int match(lua_State* L, by_pointer
, int index) { object_rep* obj = is_class_object(L, index); if (obj == 0) return -1; // cannot cast a constant object to nonconst if (obj->flags() & object_rep::constant) return -1; if (!(obj->flags() & object_rep::owner)) return -1; int d; return implicit_cast(obj->crep(), LUABIND_TYPEID(T), d); } template
void converter_postcall(lua_State*, T, int) {} }; template<> struct adopt_pointer
{ typedef boost::mpl::bool_
is_value_converter; typedef adopt_pointer type; template
void apply(lua_State* L, T* ptr) { if (ptr == 0) { lua_pushnil(L); return; } // if there is a back_reference, then the // ownership will be removed from the // back reference and put on the lua stack. if (luabind::move_back_reference(L, ptr)) { object_rep* obj = static_cast
(lua_touserdata(L, -1)); obj->set_flags(obj->flags() | object_rep::owner); return; } class_registry* registry = class_registry::get_registry(L); class_rep* crep = registry->find_class(LUABIND_TYPEID(T)); /* // create the struct to hold the object void* obj = lua_newuserdata(L, sizeof(object_rep)); // we send 0 as destructor since we know it will never be called new(obj) object_rep(ptr, crep, object_rep::owner, delete_s
::apply);*/ void* obj; void* held; boost::tie(obj,held) = crep->allocate(L); new(obj) object_rep(ptr, crep, object_rep::owner, delete_s
::apply); // set the meta table detail::getref(L, crep->metatable_ref()); lua_setmetatable(L, -2); } }; template
// struct adopt_policy : converter_policy_tag struct adopt_policy : conversion_policy
{ // BOOST_STATIC_CONSTANT(int, index = N); static void precall(lua_State*, const index_map&) {} static void postcall(lua_State*, const index_map&) {} struct only_accepts_nonconst_pointers {}; template
struct apply { typedef luabind::detail::is_nonconst_pointer
is_nonconst_p; typedef typename boost::mpl::if_
, only_accepts_nonconst_pointers>::type type; }; }; }} namespace luabind { template
detail::policy_cons
, detail::null_type> adopt(LUABIND_PLACEHOLDER_ARG(N)) { return detail::policy_cons
, detail::null_type>(); } } #endif // LUABIND_ADOPT_POLICY_HPP_INCLUDE
adopt_policy.hpp
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