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2003-12-23 Benjamin Kosnik <bkoz@redhat.com> * include/ext/new_allocator.h (new_allocator): Proper allocator class. (__new_alloc): Delete. * include/ext/malloc_allocator.h (malloc_allocator): Same. (__malloc_alloc): Delete. * include/ext/mt_allocator.h: Same, but weakly. * include/ext/debug_allocator.h: Convert to the new style. * include/ext/pool_allocator.h: Use global new and delete directly. * include/backward/alloc.h: Don't inject malloc_allocator, or debug_allocator. * testsuite/ext/allocators.cc: Minimal fixups for usage of new classes. Comment out tests with __pool_alloc for now. * testsuite/performance/allocator.cc: Same. From-SVN: r74965
106 lines
3.7 KiB
C++
106 lines
3.7 KiB
C++
// Allocators -*- C++ -*-
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// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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/*
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* Copyright (c) 1996-1997
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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/** @file ext/debug_allocator.h
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* This file is a GNU extension to the Standard C++ Library.
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* You should only include this header if you are using GCC 3 or later.
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*/
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#ifndef _DEBUG_ALLOCATOR_H
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#define _DEBUG_ALLOCATOR_H 1
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#include <memory>
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namespace __gnu_cxx
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{
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/**
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* @brief A meta-allocator with debugging bits, as per [20.4].
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*
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* This is precisely the allocator defined in the C++ Standard.
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* - all allocation calls operator new
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* - all deallocation calls operator delete
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*
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* (See @link Allocators allocators info @endlink for more.)
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*/
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template<typename _Alloc>
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class debug_allocator
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{
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public:
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typedef typename _Alloc::size_type size_type;
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typedef typename _Alloc::difference_type difference_type;
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typedef typename _Alloc::pointer pointer;
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typedef typename _Alloc::const_pointer const_pointer;
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typedef typename _Alloc::reference reference;
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typedef typename _Alloc::const_reference const_reference;
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typedef typename _Alloc::value_type value_type;
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private:
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// Size of space used to store size. Note that this must be
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// large enough to preserve alignment.
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const size_t _M_extra;
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_Alloc _M_allocator;
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public:
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debug_allocator() : _M_extra(8) { }
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pointer
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allocate(size_type __n, std::allocator<void>::const_pointer = 0)
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{
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pointer __result = _M_allocator.allocate(__n + _M_extra);
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*__result = __n;
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return __result + _M_extra;
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}
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void
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deallocate(pointer __p, size_type __n)
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{
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pointer __real_p = __p - _M_extra;
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if (*__real_p != __n)
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abort();
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_M_allocator.deallocate(__real_p, __n + _M_extra);
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}
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};
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} // namespace __gnu_cxx
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#endif
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