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 /* This must come before any other includes.  */
  21 #include "defs.h"
  22
  23 #include "hw-main.h"
  24 #include "hw-base.h"
  25
  26 #include <stdlib.h>
  27
  28 struct hw_alloc_data
  29 {
  30   void *alloc;
  31   struct hw_alloc_data *next;
  32 };
  33
  34 void
  35 create_hw_alloc_data (struct hw *me)
  36 {
  37   /* NULL */
  38 }
  39
  40 void
  41 delete_hw_alloc_data (struct hw *me)
  42 {
  43   while (me->alloc_of_hw != NULL)
  44     {
  45       hw_free (me, me->alloc_of_hw->alloc);
  46     }
  47 }
  48
  49
  50
  51 void *
  52 hw_zalloc (struct hw *me, unsigned long size)
  53 {
  54   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  55   memory->alloc = zalloc (size);
  56   memory->next = me->alloc_of_hw;
  57   me->alloc_of_hw = memory;
  58   return memory->alloc;
  59 }
  60
  61 void *
  62 hw_malloc (struct hw *me, unsigned long size)
  63 {
  64   struct hw_alloc_data *memory = ZALLOC (struct hw_alloc_data);
  65   memory->alloc = zalloc (size);
  66   memory->next = me->alloc_of_hw;
  67   me->alloc_of_hw = memory;
  68   return memory->alloc;
  69 }
  70
  71 void
  72 hw_free (struct hw *me,
  73          void *alloc)
  74 {
  75   struct hw_alloc_data **memory;
  76   for (memory = &me->alloc_of_hw;
  77        *memory != NULL;
  78        memory = &(*memory)->next)
  79     {
  80       if ((*memory)->alloc == alloc)
  81         {
  82           struct hw_alloc_data *die = (*memory);
  83           (*memory) = die->next;
  84           free (die->alloc);
  85           free (die);
  86           return;
  87         }
  88     }
  89   hw_abort (me, "free of memory not belonging to a device");
  90 }