//
// Copyright (C) 2000-2002 Andrey Slepuhin <pooh@msu.ru>
//
// libp++ 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 of the License, or
// (at your option) any later version.
//
// libp++ 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 libp++; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// $Source$
// $Revision$
// $Date$
// Author: Andrey Slepuhin <pooh@msu.ru>

#ifndef __pxx_default_allocator_ih__
#define __pxx_default_allocator_ih__

#include "pxx_default_allocator.hh"
#include "pxx_allocator.ih"

namespace pxx
{

inline DefaultAllocator::DefaultAllocator () :
  allocator (null)
{}

inline DefaultAllocator::~DefaultAllocator ()
{}

//
// Allocate memory block of _size bytes
inline void* DefaultAllocator::allocate (size_t _size)
{
  if (allocator == null) set(default_malloc_allocator);
  return allocator->allocate(_size);
}

//
// Free memory block at _ptr
inline void DefaultAllocator::deallocate (void* _ptr)
{
  if (allocator == null) set(default_malloc_allocator);
  return allocator->deallocate(_ptr);
}

//
// Resize memory block at _ptr to _size bytes
inline void* DefaultAllocator::reallocate (void* _ptr, size_t _size)
{
  if (allocator == null) set(default_malloc_allocator);
  return allocator->reallocate(_ptr, _size);
}

inline size_t DefaultAllocator::get_real_size (size_t _size) const
{
  if (allocator == null)
    const_cast<DefaultAllocator*>(this)->set(default_malloc_allocator);
  return allocator->get_real_size(_size);
}

//
// Returns (if possible) the start address of allocated block containing a
// pointer, otherwise returns null
inline void* DefaultAllocator::get_block (void* _ptr)
{
  if (allocator == null) set(default_malloc_allocator);
  return allocator->get_block(_ptr);
}

//
// The same as previous, but using block size
inline void* DefaultAllocator::get_block (void* _ptr, size_t _size)
{
  if (allocator == null) set(default_malloc_allocator);
  return allocator->get_block(_ptr, _size);
}

inline bool DefaultAllocator::is_dyn_addr (void* _ptr)
{
  if (allocator == null) set(default_malloc_allocator);
  return allocator->is_dyn_addr(_ptr);
}

inline Allocator& DefaultAllocator::get ()
{
  if (allocator) return *allocator;
  return default_malloc_allocator;
}

inline void DefaultAllocator::set (Allocator& _allocator)
{
  if (allocator == null) {
    allocator = &_allocator;
    features = _allocator.get_features();
    _allocator.set_as_default = true;
  } else if (allocator == &default_malloc_allocator)
    FATAL("Default malloc allocator already was used");
  else
    FATAL("Default allocator already set");
}

}

#endif // __pxx_default_allocator_ih__