libstdc++-v3/config/allocator/pool_allocator_base.h

   1 // Base to std::allocator -*- C++ -*-
   2
   3 // Copyright (C) 2004-2015 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 bits/c++allocator.h
  26  *  This is an internal header file, included by other library headers.
  27  *  Do not attempt to use it directly. @headername{memory}
  28  */
  29
  30 #ifndef _GLIBCXX_CXX_ALLOCATOR_H
  31 #define _GLIBCXX_CXX_ALLOCATOR_H 1
  32
  33 #include <ext/pool_allocator.h>
  34
  35 #if __cplusplus >= 201103L
  36 namespace std
  37 {
  38   /**
  39    *  @brief  An alias to the base class for std::allocator.
  40    *  @ingroup allocators
  41    *
  42    *  Used to set the std::allocator base class to
  43    *  __gnu_cxx::__pool_alloc.
  44    *
  45    *  @tparam  _Tp  Type of allocated object.
  46     */
  47   template<typename _Tp>
  48     using __allocator_base = __gnu_cxx::__pool_alloc<_Tp>;
  49 }
  50 #else
  51 // Define __pool_alloc as the base class to std::allocator.
  52 # define __allocator_base  __gnu_cxx::__pool_alloc
  53 #endif
  54
  55 #endif