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/* Hardware memory allocator.

   Copyright (C) 1998 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 2, 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, write to the Free Software Foundation, Inc.,

59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#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)

{

  if (me->alloc_of_hw != NULL)

    hw_abort (me, "hw-alloc botch");

  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");

}