gdb/registry.c

   1 /* Support functions for general registry objects.
   2
   3    Copyright (C) 2011-2020 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 const struct registry_data *
  23 register_data_with_cleanup (struct registry_data_registry *registry,
  24                             registry_data_callback save,
  25                             registry_data_callback free)
  26 {
  27   struct registry_data_registration **curr;
  28
  29   /* Append new registration.  */
  30   for (curr = &registry->registrations;
  31        *curr != NULL;
  32        curr = &(*curr)->next)
  33     ;
  34
  35   *curr = XNEW (struct registry_data_registration);
  36   (*curr)->next = NULL;
  37   (*curr)->data = XNEW (struct registry_data);
  38   (*curr)->data->index = registry->num_registrations++;
  39   (*curr)->data->save = save;
  40   (*curr)->data->free = free;
  41
  42   return (*curr)->data;
  43 }
  44
  45 void
  46 registry_alloc_data (struct registry_data_registry *registry,
  47                        struct registry_fields *fields)
  48 {
  49   gdb_assert (fields->data == NULL);
  50   fields->num_data = registry->num_registrations;
  51   fields->data = XCNEWVEC (void *, fields->num_data);
  52 }
  53
  54 void
  55 registry_clear_data (struct registry_data_registry *data_registry,
  56                      registry_callback_adaptor adaptor,
  57                      struct registry_container *container,
  58                      struct registry_fields *fields)
  59 {
  60   struct registry_data_registration *registration;
  61   int i;
  62
  63   gdb_assert (fields->data != NULL);
  64
  65   /* Process all the save handlers.  */
  66
  67   for (registration = data_registry->registrations, i = 0;
  68        i < fields->num_data;
  69        registration = registration->next, i++)
  70     if (fields->data[i] != NULL && registration->data->save != NULL)
  71       adaptor (registration->data->save, container, fields->data[i]);
  72
  73   /* Now process all the free handlers.  */
  74
  75   for (registration = data_registry->registrations, i = 0;
  76        i < fields->num_data;
  77        registration = registration->next, i++)
  78     if (fields->data[i] != NULL && registration->data->free != NULL)
  79       adaptor (registration->data->free, container, fields->data[i]);
  80
  81   memset (fields->data, 0, fields->num_data * sizeof (void *));
  82 }
  83
  84 void
  85 registry_container_free_data (struct registry_data_registry *data_registry,
  86                               registry_callback_adaptor adaptor,
  87                               struct registry_container *container,
  88                               struct registry_fields *fields)
  89 {
  90   void ***rdata = &fields->data;
  91   gdb_assert (*rdata != NULL);
  92   registry_clear_data (data_registry, adaptor, container, fields);
  93   xfree (*rdata);
  94   *rdata = NULL;
  95 }
  96
  97 void
  98 registry_set_data (struct registry_fields *fields,
  99                    const struct registry_data *data,
 100                    void *value)
 101 {
 102   gdb_assert (data->index < fields->num_data);
 103   fields->data[data->index] = value;
 104 }
 105
 106 void *
 107 registry_data (struct registry_fields *fields,
 108                const struct registry_data *data)
 109 {
 110   gdb_assert (data->index < fields->num_data);
 111   return fields->data[data->index];
 112 }