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// Testing allocator for the C++ library testsuite.
//
// Copyright (C) 2002 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 2, 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.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
//
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
// This file provides an test instrumentation allocator that can be
// used to verify allocation functionality of standard library
// containers. 2002.11.25 smw
#ifndef _GLIBCPP_TESTSUITE_ALLOCATOR_H
#define _GLIBCPP_TESTSUITE_ALLOCATOR_H
#include <cstddef>
#include <limits>
class gnu_allocator_tracker
{
public:
typedef std::size_t size_type;
static void*
allocate(size_type blocksize)
{
allocationTotal_ += blocksize;
return ::operator new(blocksize);
}
static void
construct()
{ constructCount_++; }
static void
destroy()
{ destructCount_++; }
static void
deallocate(void* p, size_type blocksize)
{
::operator delete(p);
deallocationTotal_ += blocksize;
}
static size_type
allocationTotal()
{ return allocationTotal_; }
static size_type
deallocationTotal()
{ return deallocationTotal_; }
static int
constructCount()
{ return constructCount_; }
static int
destructCount()
{ return destructCount_; }
static void
resetCounts()
{
allocationTotal_ = 0;
deallocationTotal_ = 0;
constructCount_ = 0;
destructCount_ = 0;
}
private:
static size_type allocationTotal_;
static size_type deallocationTotal_;
static int constructCount_;
static int destructCount_;
};
// A simple basic allocator that just forwards to the
// gnu_allocator_tracker to fulfill memory requests. This class is
// templated on the target object type, but gnu_allocator_tracker
// isn't.
template<class T>
class gnu_new_allocator
{
public:
typedef T value_type;
typedef T* pointer;
typedef const T* const_pointer;
typedef T& reference;
typedef const T& const_reference;
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
template<class U> struct rebind { typedef gnu_new_allocator<U> other; };
pointer
address(reference value) const
{ return &value; }
const_pointer
address(const_reference value) const
{ return &value; }
gnu_new_allocator() throw()
{ }
gnu_new_allocator(const gnu_new_allocator&) throw()
{ }
template<class U>
gnu_new_allocator(const gnu_new_allocator<U>&) throw()
{ }
~gnu_new_allocator() throw()
{ }
size_type
max_size() const throw()
{ return std::numeric_limits<std::size_t>::max() / sizeof(T); }
pointer
allocate(size_type num, const void* = 0)
{
return static_cast<pointer>(gnu_allocator_tracker::allocate(num *
sizeof(T)));
}
void
construct(pointer p, const T& value)
{
new (p) T(value);
gnu_allocator_tracker::construct();
}
void
destroy(pointer p)
{
p->~T();
gnu_allocator_tracker::destroy();
}
void
deallocate(pointer p, size_type num)
{ gnu_allocator_tracker::deallocate(p, num * sizeof(T)); }
};
template<class T1, class T2>
bool
operator==(const gnu_new_allocator<T1>&,
const gnu_new_allocator<T2>&) throw()
{ return true; }
template<class T1, class T2>
bool
operator!=(const gnu_new_allocator<T1>&,
const gnu_new_allocator<T2>&) throw()
{ return false; }
#endif // _GLIBCPP_TESTSUITE_ALLOCATOR_H
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