sim/common/hw-alloc.c

   1 /* Hardware memory allocator.
   2    Copyright (C) 1998-2021 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 3 of the License, or
  10 (at your option) 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
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 #include "hw-main.h"
  22 #include "hw-base.h"
  23
  24 #include <stdlib.h>
  25
  26 struct hw_alloc_data
  27 {
  28   void *alloc;
  29   struct hw_alloc_data *next;
  30 };
  31
  32 void
  33 create_hw_alloc_data (struct hw *me)
  34 {
  35   /* NULL */
  36 }
  37
  38 void
  39 delete_hw_alloc_data (struct hw *me)
  40 {
  41   while (me->alloc_of_hw != NULL)
  42     {
  43       hw_free (me, me->alloc_of_hw->alloc);
  44     }
  45 }
  46
  47
  48
  49 void *
  50 hw_zalloc (struct hw *me, unsigned long size)
  51 {
  52   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  53   memory->alloc = zalloc (size);
  54   memory->next = me->alloc_of_hw;
  55   me->alloc_of_hw = memory;
  56   return memory->alloc;
  57 }
  58
  59 void *
  60 hw_malloc (struct hw *me, unsigned long size)
  61 {
  62   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  63   memory->alloc = zalloc (size);
  64   memory->next = me->alloc_of_hw;
  65   me->alloc_of_hw = memory;
  66   return memory->alloc;
  67 }
  68
  69 void
  70 hw_free (struct hw *me,
  71          void *alloc)
  72 {
  73   struct hw_alloc_data **memory;
  74   for (memory = &me->alloc_of_hw;
  75        *memory != NULL;
  76        memory = &(*memory)->next)
  77     {
  78       if ((*memory)->alloc == alloc)
  79         {
  80           struct hw_alloc_data *die = (*memory);
  81           (*memory) = die->next;
  82           free (die->alloc);
  83           free (die);
  84           return;
  85         }
  86     }
  87   hw_abort (me, "free of memory not belonging to a device");
  88 }