1// Copyright 2011 Google Inc.
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met:
7//
8// * Redistributions of source code must retain the above copyright
9//   notice, this list of conditions and the following disclaimer.
10// * Redistributions in binary form must reproduce the above copyright
11//   notice, this list of conditions and the following disclaimer in the
12//   documentation and/or other materials provided with the distribution.
13// * Neither the name of Google Inc. nor the names of its contributors
14//   may be used to endorse or promote products derived from this software
15//   without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29#if !defined(LUTOK_STATE_IPP)
30#define LUTOK_STATE_IPP
31
32#include <lutok/state.hpp>
33
34namespace lutok {
35
36
37/// Wrapper around lua_newuserdata.
38///
39/// This allocates an object as big as the size of the provided Type.
40///
41/// \return The pointer to the allocated userdata object.
42///
43/// \warning Terminates execution if there is not enough memory.
44template< typename Type >
45Type*
46state::new_userdata(void)
47{
48    return static_cast< Type* >(new_userdata_voidp(sizeof(Type)));
49}
50
51
52/// Wrapper around lua_touserdata.
53///
54/// \param index The second parameter to lua_touserdata.
55///
56/// \return The return value of lua_touserdata.
57template< typename Type >
58Type*
59state::to_userdata(const int index)
60{
61    return static_cast< Type* >(to_userdata_voidp(index));
62}
63
64
65}  // namespace lutok
66
67#endif  // !defined(LUTOK_STATE_IPP)
68