182 lines
4.6 KiB
C
182 lines
4.6 KiB
C
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// Testing allocator for the C++ library testsuite.
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//
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// Copyright (C) 2002 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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//
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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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//
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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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//
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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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// This file provides an test instrumentation allocator that can be
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// used to verify allocation functionality of standard library
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// containers. 2002.11.25 smw
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#ifndef _GLIBCPP_TESTSUITE_ALLOCATOR_H
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#define _GLIBCPP_TESTSUITE_ALLOCATOR_H
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#include <cstddef>
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#include <limits>
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class gnu_allocator_tracker
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{
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public:
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typedef std::size_t size_type;
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static void*
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allocate(size_type blocksize)
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{
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allocationTotal_ += blocksize;
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return ::operator new(blocksize);
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}
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static void
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construct()
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{ constructCount_++; }
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static void
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destroy()
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{ destructCount_++; }
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static void
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deallocate(void* p, size_type blocksize)
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{
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::operator delete(p);
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deallocationTotal_ += blocksize;
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}
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static size_type
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allocationTotal()
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{ return allocationTotal_; }
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static size_type
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deallocationTotal()
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{ return deallocationTotal_; }
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static int
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constructCount()
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{ return constructCount_; }
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static int
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destructCount()
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{ return destructCount_; }
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static void
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resetCounts()
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{
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allocationTotal_ = 0;
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deallocationTotal_ = 0;
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constructCount_ = 0;
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destructCount_ = 0;
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}
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private:
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static size_type allocationTotal_;
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static size_type deallocationTotal_;
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static int constructCount_;
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static int destructCount_;
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};
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// A simple basic allocator that just forwards to the
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// gnu_allocator_tracker to fulfill memory requests. This class is
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// templated on the target object type, but gnu_allocator_tracker
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// isn't.
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template<class T>
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class gnu_new_allocator
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{
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public:
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typedef T value_type;
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typedef T* pointer;
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typedef const T* const_pointer;
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typedef T& reference;
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typedef const T& const_reference;
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typedef std::size_t size_type;
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typedef std::ptrdiff_t difference_type;
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template<class U> struct rebind { typedef gnu_new_allocator<U> other; };
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pointer
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address(reference value) const
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{ return &value; }
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const_pointer
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address(const_reference value) const
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{ return &value; }
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gnu_new_allocator() throw()
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{ }
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gnu_new_allocator(const gnu_new_allocator&) throw()
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{ }
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template<class U>
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gnu_new_allocator(const gnu_new_allocator<U>&) throw()
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{ }
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~gnu_new_allocator() throw()
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{ }
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size_type
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max_size() const throw()
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{ return std::numeric_limits<std::size_t>::max() / sizeof(T); }
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pointer
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allocate(size_type num, const void* = 0)
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{
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return static_cast<pointer>(gnu_allocator_tracker::allocate(num *
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sizeof(T)));
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}
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void
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construct(pointer p, const T& value)
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{
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new (p) T(value);
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gnu_allocator_tracker::construct();
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}
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void
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destroy(pointer p)
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{
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p->~T();
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gnu_allocator_tracker::destroy();
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}
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void
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deallocate(pointer p, size_type num)
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{ gnu_allocator_tracker::deallocate(p, num * sizeof(T)); }
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};
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template<class T1, class T2>
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bool
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operator==(const gnu_new_allocator<T1>&,
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const gnu_new_allocator<T2>&) throw()
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{ return true; }
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template<class T1, class T2>
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bool
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operator!=(const gnu_new_allocator<T1>&,
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const gnu_new_allocator<T2>&) throw()
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{ return false; }
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#endif // _GLIBCPP_TESTSUITE_ALLOCATOR_H
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