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Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/include/bits/allocator.h')
| -rw-r--r-- | gcc-4.4.3/libstdc++-v3/include/bits/allocator.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/include/bits/allocator.h b/gcc-4.4.3/libstdc++-v3/include/bits/allocator.h new file mode 100644 index 000000000..334fee5d1 --- /dev/null +++ b/gcc-4.4.3/libstdc++-v3/include/bits/allocator.h @@ -0,0 +1,181 @@ +// Allocators -*- C++ -*- + +// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 +// Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// Under Section 7 of GPL version 3, you are granted additional +// permissions described in the GCC Runtime Library Exception, version +// 3.1, as published by the Free Software Foundation. + +// You should have received a copy of the GNU General Public License and +// a copy of the GCC Runtime Library Exception along with this program; +// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +// <http://www.gnu.org/licenses/>. + +/* + * Copyright (c) 1996-1997 + * Silicon Graphics Computer Systems, Inc. + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation. Silicon Graphics makes no + * representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + */ + +/** @file allocator.h + * This is an internal header file, included by other library headers. + * You should not attempt to use it directly. + */ + +#ifndef _ALLOCATOR_H +#define _ALLOCATOR_H 1 + +// Define the base class to std::allocator. +#include <bits/c++allocator.h> + +_GLIBCXX_BEGIN_NAMESPACE(std) + + /** + * @defgroup allocators Allocators + * @ingroup memory + * + * Classes encapsulating memory operations. + */ + + template<typename _Tp> + class allocator; + + /// allocator<void> specialization. + template<> + class allocator<void> + { + public: + typedef size_t size_type; + typedef ptrdiff_t difference_type; + typedef void* pointer; + typedef const void* const_pointer; + typedef void value_type; + + template<typename _Tp1> + struct rebind + { typedef allocator<_Tp1> other; }; + }; + + /** + * @brief The "standard" allocator, as per [20.4]. + * @ingroup allocators + * + * Further details: + * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt04ch11.html + */ + template<typename _Tp> + class allocator: public __glibcxx_base_allocator<_Tp> + { + public: + typedef size_t size_type; + typedef ptrdiff_t difference_type; + typedef _Tp* pointer; + typedef const _Tp* const_pointer; + typedef _Tp& reference; + typedef const _Tp& const_reference; + typedef _Tp value_type; + + template<typename _Tp1> + struct rebind + { typedef allocator<_Tp1> other; }; + + allocator() throw() { } + + allocator(const allocator& __a) throw() + : __glibcxx_base_allocator<_Tp>(__a) { } + + template<typename _Tp1> + allocator(const allocator<_Tp1>&) throw() { } + + ~allocator() throw() { } + + // Inherit everything else. + }; + + template<typename _T1, typename _T2> + inline bool + operator==(const allocator<_T1>&, const allocator<_T2>&) + { return true; } + + template<typename _Tp> + inline bool + operator==(const allocator<_Tp>&, const allocator<_Tp>&) + { return true; } + + template<typename _T1, typename _T2> + inline bool + operator!=(const allocator<_T1>&, const allocator<_T2>&) + { return false; } + + template<typename _Tp> + inline bool + operator!=(const allocator<_Tp>&, const allocator<_Tp>&) + { return false; } + + // Inhibit implicit instantiations for required instantiations, + // which are defined via explicit instantiations elsewhere. + // NB: This syntax is a GNU extension. +#if _GLIBCXX_EXTERN_TEMPLATE + extern template class allocator<char>; + extern template class allocator<wchar_t>; +#endif + + // Undefine. +#undef __glibcxx_base_allocator + + // To implement Option 3 of DR 431. + template<typename _Alloc, bool = __is_empty(_Alloc)> + struct __alloc_swap + { static void _S_do_it(_Alloc&, _Alloc&) { } }; + + template<typename _Alloc> + struct __alloc_swap<_Alloc, false> + { + static void + _S_do_it(_Alloc& __one, _Alloc& __two) + { + // Precondition: swappable allocators. + if (__one != __two) + swap(__one, __two); + } + }; + + // Optimize for stateless allocators. + template<typename _Alloc, bool = __is_empty(_Alloc)> + struct __alloc_neq + { + static bool + _S_do_it(const _Alloc&, const _Alloc&) + { return false; } + }; + + template<typename _Alloc> + struct __alloc_neq<_Alloc, false> + { + static bool + _S_do_it(const _Alloc& __one, const _Alloc& __two) + { return __one != __two; } + }; + +_GLIBCXX_END_NAMESPACE + +#endif |