| // Memory extensions -*- C++ -*- |
| |
| // Copyright (C) 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) 1994 |
| * Hewlett-Packard Company |
| * |
| * 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. Hewlett-Packard Company makes no |
| * representations about the suitability of this software for any |
| * purpose. It is provided "as is" without express or implied warranty. |
| * |
| * |
| * Copyright (c) 1996 |
| * 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 ext/memory |
| * This file is a GNU extension to the Standard C++ Library (possibly |
| * containing extensions from the HP/SGI STL subset). |
| */ |
| |
| #ifndef _EXT_MEMORY |
| #define _EXT_MEMORY 1 |
| |
| #pragma GCC system_header |
| |
| #include <memory> |
| #include <bits/stl_tempbuf.h> |
| |
| namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| using std::ptrdiff_t; |
| using std::pair; |
| using std::__iterator_category; |
| using std::_Temporary_buffer; |
| |
| template<typename _InputIter, typename _Size, typename _ForwardIter> |
| pair<_InputIter, _ForwardIter> |
| __uninitialized_copy_n(_InputIter __first, _Size __count, |
| _ForwardIter __result, std::input_iterator_tag) |
| { |
| _ForwardIter __cur = __result; |
| __try |
| { |
| for (; __count > 0 ; --__count, ++__first, ++__cur) |
| std::_Construct(&*__cur, *__first); |
| return pair<_InputIter, _ForwardIter>(__first, __cur); |
| } |
| __catch(...) |
| { |
| std::_Destroy(__result, __cur); |
| __throw_exception_again; |
| } |
| } |
| |
| template<typename _RandomAccessIter, typename _Size, typename _ForwardIter> |
| inline pair<_RandomAccessIter, _ForwardIter> |
| __uninitialized_copy_n(_RandomAccessIter __first, _Size __count, |
| _ForwardIter __result, |
| std::random_access_iterator_tag) |
| { |
| _RandomAccessIter __last = __first + __count; |
| return (pair<_RandomAccessIter, _ForwardIter> |
| (__last, std::uninitialized_copy(__first, __last, __result))); |
| } |
| |
| template<typename _InputIter, typename _Size, typename _ForwardIter> |
| inline pair<_InputIter, _ForwardIter> |
| __uninitialized_copy_n(_InputIter __first, _Size __count, |
| _ForwardIter __result) |
| { return __gnu_cxx::__uninitialized_copy_n(__first, __count, __result, |
| __iterator_category(__first)); } |
| |
| /** |
| * @brief Copies the range [first,last) into result. |
| * @param first An input iterator. |
| * @param last An input iterator. |
| * @param result An output iterator. |
| * @return result + (first - last) |
| * @ingroup SGIextensions |
| * |
| * Like copy(), but does not require an initialized output range. |
| */ |
| template<typename _InputIter, typename _Size, typename _ForwardIter> |
| inline pair<_InputIter, _ForwardIter> |
| uninitialized_copy_n(_InputIter __first, _Size __count, |
| _ForwardIter __result) |
| { return __gnu_cxx::__uninitialized_copy_n(__first, __count, __result, |
| __iterator_category(__first)); } |
| |
| |
| // An alternative version of uninitialized_copy_n that constructs |
| // and destroys objects with a user-provided allocator. |
| template<typename _InputIter, typename _Size, typename _ForwardIter, |
| typename _Allocator> |
| pair<_InputIter, _ForwardIter> |
| __uninitialized_copy_n_a(_InputIter __first, _Size __count, |
| _ForwardIter __result, |
| _Allocator __alloc) |
| { |
| _ForwardIter __cur = __result; |
| __try |
| { |
| for (; __count > 0 ; --__count, ++__first, ++__cur) |
| __alloc.construct(&*__cur, *__first); |
| return pair<_InputIter, _ForwardIter>(__first, __cur); |
| } |
| __catch(...) |
| { |
| std::_Destroy(__result, __cur, __alloc); |
| __throw_exception_again; |
| } |
| } |
| |
| template<typename _InputIter, typename _Size, typename _ForwardIter, |
| typename _Tp> |
| inline pair<_InputIter, _ForwardIter> |
| __uninitialized_copy_n_a(_InputIter __first, _Size __count, |
| _ForwardIter __result, |
| std::allocator<_Tp>) |
| { |
| return __gnu_cxx::uninitialized_copy_n(__first, __count, __result); |
| } |
| |
| /** |
| * This class provides similar behavior and semantics of the standard |
| * functions get_temporary_buffer() and return_temporary_buffer(), but |
| * encapsulated in a type vaguely resembling a standard container. |
| * |
| * By default, a temporary_buffer<Iter> stores space for objects of |
| * whatever type the Iter iterator points to. It is constructed from a |
| * typical [first,last) range, and provides the begin(), end(), size() |
| * functions, as well as requested_size(). For non-trivial types, copies |
| * of *first will be used to initialize the storage. |
| * |
| * @c malloc is used to obtain underlying storage. |
| * |
| * Like get_temporary_buffer(), not all the requested memory may be |
| * available. Ideally, the created buffer will be large enough to hold a |
| * copy of [first,last), but if size() is less than requested_size(), |
| * then this didn't happen. |
| * |
| * @ingroup SGIextensions |
| */ |
| template <class _ForwardIterator, class _Tp |
| = typename std::iterator_traits<_ForwardIterator>::value_type > |
| struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp> |
| { |
| /// Requests storage large enough to hold a copy of [first,last). |
| temporary_buffer(_ForwardIterator __first, _ForwardIterator __last) |
| : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) { } |
| |
| /// Destroys objects and frees storage. |
| ~temporary_buffer() { } |
| }; |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace |
| |
| #endif |
| |
