sim/common/hw-alloc.c

   1 /* Hardware memory allocator.
   2    Copyright (C) 1998 Free Software Foundation, Inc.
   3    Contributed by Cygnus Support.
   4
   5 This file is part of GDB, the GNU debugger.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  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   void *alloc;
  32   int zalloc_p;
  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   if (me->alloc_of_hw != NULL)
  46     hw_abort (me, "hw-alloc botch");
  47   while (me->alloc_of_hw != NULL)
  48     {
  49       hw_free (me, me->alloc_of_hw->alloc);
  50     }
  51 }
  52
  53
  54
  55 void *
  56 hw_zalloc (struct hw *me, unsigned long size)
  57 {
  58   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  59   memory->alloc = zalloc (size);
  60   memory->zalloc_p = 1;
  61   memory->next = me->alloc_of_hw;
  62   me->alloc_of_hw = memory;
  63   return memory->alloc;
  64 }
  65
  66 void *
  67 hw_malloc (struct hw *me, unsigned long size)
  68 {
  69   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  70   memory->alloc = zalloc (size);
  71   memory->zalloc_p = 0;
  72   memory->next = me->alloc_of_hw;
  73   me->alloc_of_hw = memory;
  74   return memory->alloc;
  75 }
  76
  77 void
  78 hw_free (struct hw *me,
  79          void *alloc)
  80 {
  81   struct hw_alloc_data **memory;
  82   for (memory = &me->alloc_of_hw;
  83        *memory != NULL;
  84        memory = &(*memory)->next)
  85     {
  86       if ((*memory)->alloc == alloc)
  87         {
  88           struct hw_alloc_data *die = (*memory);
  89           (*memory) = die->next;
  90           if (die->zalloc_p)
  91             zfree (die->alloc);
  92           else
  93             free (die->alloc);
  94           zfree (die);
  95           return;
  96         }
  97     }
  98   hw_abort (me, "free of memory not belonging to a device");
  99 }