sim/common/hw-alloc.c

   1 /* Hardware memory allocator.
   2    Copyright (C) 1998-2020 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
  25 #ifdef HAVE_STDLIB_H
  26 #include <stdlib.h>
  27 #endif
  28
  29 struct hw_alloc_data
  30 {
  31   void *alloc;
  32   struct hw_alloc_data *next;
  33 };
  34
  35 void
  36 create_hw_alloc_data (struct hw *me)
  37 {
  38   /* NULL */
  39 }
  40
  41 void
  42 delete_hw_alloc_data (struct hw *me)
  43 {
  44   while (me->alloc_of_hw != NULL)
  45     {
  46       hw_free (me, me->alloc_of_hw->alloc);
  47     }
  48 }
  49
  50
  51
  52 void *
  53 hw_zalloc (struct hw *me, unsigned long size)
  54 {
  55   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  56   memory->alloc = zalloc (size);
  57   memory->next = me->alloc_of_hw;
  58   me->alloc_of_hw = memory;
  59   return memory->alloc;
  60 }
  61
  62 void *
  63 hw_malloc (struct hw *me, unsigned long size)
  64 {
  65   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  66   memory->alloc = zalloc (size);
  67   memory->next = me->alloc_of_hw;
  68   me->alloc_of_hw = memory;
  69   return memory->alloc;
  70 }
  71
  72 void
  73 hw_free (struct hw *me,
  74          void *alloc)
  75 {
  76   struct hw_alloc_data **memory;
  77   for (memory = &me->alloc_of_hw;
  78        *memory != NULL;
  79        memory = &(*memory)->next)
  80     {
  81       if ((*memory)->alloc == alloc)
  82         {
  83           struct hw_alloc_data *die = (*memory);
  84           (*memory) = die->next;
  85           free (die->alloc);
  86           free (die);
  87           return;
  88         }
  89     }
  90   hw_abort (me, "free of memory not belonging to a device");
  91 }