sim/common/hw-alloc.c

   1 /* Hardware memory allocator.
   2    Copyright (C) 1998, 2007 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   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->zalloc_p = 1;
  59   memory->next = me->alloc_of_hw;
  60   me->alloc_of_hw = memory;
  61   return memory->alloc;
  62 }
  63
  64 void *
  65 hw_malloc (struct hw *me, unsigned long size)
  66 {
  67   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  68   memory->alloc = zalloc (size);
  69   memory->zalloc_p = 0;
  70   memory->next = me->alloc_of_hw;
  71   me->alloc_of_hw = memory;
  72   return memory->alloc;
  73 }
  74
  75 void
  76 hw_free (struct hw *me,
  77          void *alloc)
  78 {
  79   struct hw_alloc_data **memory;
  80   for (memory = &me->alloc_of_hw;
  81        *memory != NULL;
  82        memory = &(*memory)->next)
  83     {
  84       if ((*memory)->alloc == alloc)
  85         {
  86           struct hw_alloc_data *die = (*memory);
  87           (*memory) = die->next;
  88           if (die->zalloc_p)
  89             zfree (die->alloc);
  90           else
  91             free (die->alloc);
  92           zfree (die);
  93           return;
  94         }
  95     }
  96   hw_abort (me, "free of memory not belonging to a device");
  97 }