gdb/registry.c

   1 /* Support functions for general registry objects.
   2
   3    Copyright (C) 2011-2014 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 <string.h>
  23
  24 const struct registry_data *
  25 register_data_with_cleanup (struct registry_data_registry *registry,
  26                             registry_data_callback save,
  27                             registry_data_callback free)
  28 {
  29   struct registry_data_registration **curr;
  30
  31   /* Append new registration.  */
  32   for (curr = &registry->registrations;
  33        *curr != NULL;
  34        curr = &(*curr)->next)
  35     ;
  36
  37   *curr = XNEW (struct registry_data_registration);
  38   (*curr)->next = NULL;
  39   (*curr)->data = XNEW (struct registry_data);
  40   (*curr)->data->index = registry->num_registrations++;
  41   (*curr)->data->save = save;
  42   (*curr)->data->free = free;
  43
  44   return (*curr)->data;
  45 }
  46
  47 void
  48 registry_alloc_data (struct registry_data_registry *registry,
  49                        struct registry_fields *fields)
  50 {
  51   gdb_assert (fields->data == NULL);
  52   fields->num_data = registry->num_registrations;
  53   fields->data = XCNEWVEC (void *, fields->num_data);
  54 }
  55
  56 void
  57 registry_clear_data (struct registry_data_registry *data_registry,
  58                      registry_callback_adaptor adaptor,
  59                      struct registry_container *container,
  60                      struct registry_fields *fields)
  61 {
  62   struct registry_data_registration *registration;
  63   int i;
  64
  65   gdb_assert (fields->data != NULL);
  66
  67   /* Process all the save handlers.  */
  68
  69   for (registration = data_registry->registrations, i = 0;
  70        i < fields->num_data;
  71        registration = registration->next, i++)
  72     if (fields->data[i] != NULL && registration->data->save != NULL)
  73       adaptor (registration->data->save, container, fields->data[i]);
  74
  75   /* Now process all the free handlers.  */
  76
  77   for (registration = data_registry->registrations, i = 0;
  78        i < fields->num_data;
  79        registration = registration->next, i++)
  80     if (fields->data[i] != NULL && registration->data->free != NULL)
  81       adaptor (registration->data->free, container, fields->data[i]);
  82
  83   memset (fields->data, 0, fields->num_data * sizeof (void *));
  84 }
  85
  86 void
  87 registry_container_free_data (struct registry_data_registry *data_registry,
  88                               registry_callback_adaptor adaptor,
  89                               struct registry_container *container,
  90                               struct registry_fields *fields)
  91 {
  92   void ***rdata = &fields->data;
  93   gdb_assert (*rdata != NULL);
  94   registry_clear_data (data_registry, adaptor, container, fields);
  95   xfree (*rdata);
  96   *rdata = NULL;
  97 }
  98
  99 void
 100 registry_set_data (struct registry_fields *fields,
 101                    const struct registry_data *data,
 102                    void *value)
 103 {
 104   gdb_assert (data->index < fields->num_data);
 105   fields->data[data->index] = value;
 106 }
 107
 108 void *
 109 registry_data (struct registry_fields *fields,
 110                const struct registry_data *data)
 111 {
 112   gdb_assert (data->index < fields->num_data);
 113   return fields->data[data->index];
 114 }