sim/common/hw-alloc.c

/* Hardware memory allocator.
   Copyright (C) 1998, 2007, 2008, 2009 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");
}