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