gdb/registry.c

   1 /* Support functions for general registry objects.
   2
   3    Copyright (C) 2011-2013 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   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 #include "defs.h"
  21 #include "registry.h"
  22 #include "gdb_assert.h"
  23 #include "gdb_string.h"
  24
  25 const struct registry_data *
  26 register_data_with_cleanup (struct registry_data_registry *registry,
  27                             registry_data_callback save,
  28                             registry_data_callback free)
  29 {
  30   struct registry_data_registration **curr;
  31
  32   /* Append new registration.  */
  33   for (curr = &registry->registrations;
  34        *curr != NULL;
  35        curr = &(*curr)->next)
  36     ;
  37
  38   *curr = XMALLOC (struct registry_data_registration);
  39   (*curr)->next = NULL;
  40   (*curr)->data = XMALLOC (struct registry_data);
  41   (*curr)->data->index = registry->num_registrations++;
  42   (*curr)->data->save = save;
  43   (*curr)->data->free = free;
  44
  45   return (*curr)->data;
  46 }
  47
  48 void
  49 registry_alloc_data (struct registry_data_registry *registry,
  50                        struct registry_fields *fields)
  51 {
  52   gdb_assert (fields->data == NULL);
  53   fields->num_data = registry->num_registrations;
  54   fields->data = XCALLOC (fields->num_data, void *);
  55 }
  56
  57 void
  58 registry_clear_data (struct registry_data_registry *data_registry,
  59                      registry_callback_adaptor adaptor,
  60                      struct registry_container *container,
  61                      struct registry_fields *fields)
  62 {
  63   struct registry_data_registration *registration;
  64   int i;
  65
  66   gdb_assert (fields->data != NULL);
  67
  68   /* Process all the save handlers.  */
  69
  70   for (registration = data_registry->registrations, i = 0;
  71        i < fields->num_data;
  72        registration = registration->next, i++)
  73     if (fields->data[i] != NULL && registration->data->save != NULL)
  74       adaptor (registration->data->save, container, fields->data[i]);
  75
  76   /* Now process all the free handlers.  */
  77
  78   for (registration = data_registry->registrations, i = 0;
  79        i < fields->num_data;
  80        registration = registration->next, i++)
  81     if (fields->data[i] != NULL && registration->data->free != NULL)
  82       adaptor (registration->data->free, container, fields->data[i]);
  83
  84   memset (fields->data, 0, fields->num_data * sizeof (void *));
  85 }
  86
  87 void
  88 registry_container_free_data (struct registry_data_registry *data_registry,
  89                               registry_callback_adaptor adaptor,
  90                               struct registry_container *container,
  91                               struct registry_fields *fields)
  92 {
  93   void ***rdata = &fields->data;
  94   gdb_assert (*rdata != NULL);
  95   registry_clear_data (data_registry, adaptor, container, fields);
  96   xfree (*rdata);
  97   *rdata = NULL;
  98 }
  99
 100 void
 101 registry_set_data (struct registry_fields *fields,
 102                    const struct registry_data *data,
 103                    void *value)
 104 {
 105   gdb_assert (data->index < fields->num_data);
 106   fields->data[data->index] = value;
 107 }
 108
 109 void *
 110 registry_data (struct registry_fields *fields,
 111                const struct registry_data *data)
 112 {
 113   gdb_assert (data->index < fields->num_data);
 114   return fields->data[data->index];
 115 }