sim/common/hw-alloc.c

   1 /* Hardware memory allocator.
   2    Copyright (C) 1998, 2007, 2008, 2009, 2010, 2011
   3    Free Software Foundation, Inc.
   4    Contributed by Cygnus Support.
   5
   6 This file is part of GDB, the GNU debugger.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21
  22 #include "hw-main.h"
  23 #include "hw-base.h"
  24
  25
  26 #ifdef HAVE_STDLIB_H
  27 #include <stdlib.h>
  28 #endif
  29
  30 struct hw_alloc_data
  31 {
  32   void *alloc;
  33   struct hw_alloc_data *next;
  34 };
  35
  36 void
  37 create_hw_alloc_data (struct hw *me)
  38 {
  39   /* NULL */
  40 }
  41
  42 void
  43 delete_hw_alloc_data (struct hw *me)
  44 {
  45   while (me->alloc_of_hw != NULL)
  46     {
  47       hw_free (me, me->alloc_of_hw->alloc);
  48     }
  49 }
  50
  51
  52
  53 void *
  54 hw_zalloc (struct hw *me, unsigned long size)
  55 {
  56   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  57   memory->alloc = zalloc (size);
  58   memory->next = me->alloc_of_hw;
  59   me->alloc_of_hw = memory;
  60   return memory->alloc;
  61 }
  62
  63 void *
  64 hw_malloc (struct hw *me, unsigned long size)
  65 {
  66   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  67   memory->alloc = zalloc (size);
  68   memory->next = me->alloc_of_hw;
  69   me->alloc_of_hw = memory;
  70   return memory->alloc;
  71 }
  72
  73 void
  74 hw_free (struct hw *me,
  75          void *alloc)
  76 {
  77   struct hw_alloc_data **memory;
  78   for (memory = &me->alloc_of_hw;
  79        *memory != NULL;
  80        memory = &(*memory)->next)
  81     {
  82       if ((*memory)->alloc == alloc)
  83         {
  84           struct hw_alloc_data *die = (*memory);
  85           (*memory) = die->next;
  86           free (die->alloc);
  87           free (die);
  88           return;
  89         }
  90     }
  91   hw_abort (me, "free of memory not belonging to a device");
  92 }