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/* Hardware memory allocator.

   Copyright (C) 1998, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

   Contributed by Cygnus Support.

This file is part of GDB, the GNU debugger.

This program 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 3 of the License, or

(at your option) any later version.

This program 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 program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "hw-main.h"

#include "hw-base.h"

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

struct hw_alloc_data {

  void *alloc;

  int zalloc_p;

  struct hw_alloc_data *next;

};

void

create_hw_alloc_data (struct hw *me)

{

  /* NULL */

}

void

delete_hw_alloc_data (struct hw *me)

{

  while (me->alloc_of_hw != NULL)

    {

      hw_free (me, me->alloc_of_hw->alloc);

    }

}

void *

hw_zalloc (struct hw *me, unsigned long size)

{

  struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);

  memory->alloc = zalloc (size);

  memory->zalloc_p = 1;

  memory->next = me->alloc_of_hw;

  me->alloc_of_hw = memory;

  return memory->alloc;

}

void *

hw_malloc (struct hw *me, unsigned long size)

{

  struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);

  memory->alloc = zalloc (size);

  memory->zalloc_p = 0;

  memory->next = me->alloc_of_hw;

  me->alloc_of_hw = memory;

  return memory->alloc;

}

void

hw_free (struct hw *me,

         void *alloc)

{

  struct hw_alloc_data **memory;

  for (memory = &me->alloc_of_hw;

       *memory != NULL;

       memory = &(*memory)->next)

    {

      if ((*memory)->alloc == alloc)

        {

          struct hw_alloc_data *die = (*memory);

          (*memory) = die->next;

          if (die->zalloc_p)

            zfree (die->alloc);

          else

            free (die->alloc);

          zfree (die);

          return;

        }

    }

  hw_abort (me, "free of memory not belonging to a device");

}