1  // Allocator that wraps operator new -*- C++ -*-
       2  
       3  // Copyright (C) 2001-2023 Free Software Foundation, Inc.
       4  //
       5  // This file is part of the GNU ISO C++ Library.  This library is free
       6  // software; you can redistribute it and/or modify it under the
       7  // terms of the GNU General Public License as published by the
       8  // Free Software Foundation; either version 3, or (at your option)
       9  // any later version.
      10  
      11  // This library is distributed in the hope that it will be useful,
      12  // but WITHOUT ANY WARRANTY; without even the implied warranty of
      13  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14  // GNU General Public License for more details.
      15  
      16  // Under Section 7 of GPL version 3, you are granted additional
      17  // permissions described in the GCC Runtime Library Exception, version
      18  // 3.1, as published by the Free Software Foundation.
      19  
      20  // You should have received a copy of the GNU General Public License and
      21  // a copy of the GCC Runtime Library Exception along with this program;
      22  // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      23  // <http://www.gnu.org/licenses/>.
      24  
      25  /** @file ext/new_allocator.h
      26   *  This file is a GNU extension to the Standard C++ Library.
      27   */
      28  
      29  #ifndef _NEW_ALLOCATOR_H
      30  #define _NEW_ALLOCATOR_H 1
      31  
      32  #include <bits/requires_hosted.h> // GNU extensions are currently omitted
      33  
      34  #include <bits/new_allocator.h>
      35  
      36  namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
      37  {
      38  _GLIBCXX_BEGIN_NAMESPACE_VERSION
      39  
      40    /**
      41     *  @brief  An allocator that uses global `new`, as per C++03 [20.4.1].
      42     *  @ingroup allocators
      43     *
      44     *  This is precisely the allocator defined in the C++ Standard.
      45     *    - all allocation calls `operator new`
      46     *    - all deallocation calls `operator delete`
      47     *
      48     *  This is a non-standard extension that can be used to guarantee
      49     *  allocation from `new` even if the library has been configured to
      50     *  use a different implementation for `std::allocator`.
      51     *
      52     *  @tparam  _Tp  Type of allocated object.
      53     *
      54     *  @headerfile ext/new_allocator.h
      55     */
      56    template<typename _Tp>
      57      class new_allocator : public std::__new_allocator<_Tp>
      58      {
      59      public:
      60  #if __cplusplus <= 201703L
      61        template<typename _Tp1>
      62  	struct rebind
      63  	{ typedef new_allocator<_Tp1> other; };
      64  #endif
      65  
      66        new_allocator() _GLIBCXX_USE_NOEXCEPT { }
      67  
      68        new_allocator(const new_allocator&) _GLIBCXX_USE_NOEXCEPT { }
      69  
      70        template<typename _Tp1>
      71  	new_allocator(const new_allocator<_Tp1>&) _GLIBCXX_USE_NOEXCEPT { }
      72      };
      73  
      74  _GLIBCXX_END_NAMESPACE_VERSION
      75  } // namespace
      76  
      77  #endif