gdb/registry.c

   1 /* Support functions for general registry objects.
   2
   3    Copyright (C) 2011, 2012
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "registry.h"
  23 #include "gdb_assert.h"
  24 #include "gdb_string.h"
  25
  26 const struct registry_data *
  27 register_data_with_cleanup (struct registry_data_registry *registry,
  28                             registry_data_callback save,
  29                             registry_data_callback free)
  30 {
  31   struct registry_data_registration **curr;
  32
  33   /* Append new registration.  */
  34   for (curr = &registry->registrations;
  35        *curr != NULL;
  36        curr = &(*curr)->next)
  37     ;
  38
  39   *curr = XMALLOC (struct registry_data_registration);
  40   (*curr)->next = NULL;
  41   (*curr)->data = XMALLOC (struct registry_data);
  42   (*curr)->data->index = registry->num_registrations++;
  43   (*curr)->data->save = save;
  44   (*curr)->data->free = free;
  45
  46   return (*curr)->data;
  47 }
  48
  49 void
  50 registry_alloc_data (struct registry_data_registry *registry,
  51                        struct registry_fields *fields)
  52 {
  53   gdb_assert (fields->data == NULL);
  54   fields->num_data = registry->num_registrations;
  55   fields->data = XCALLOC (fields->num_data, void *);
  56 }
  57
  58 void
  59 registry_clear_data (struct registry_data_registry *data_registry,
  60                      registry_callback_adaptor adaptor,
  61                      struct registry_container *container,
  62                      struct registry_fields *fields)
  63 {
  64   struct registry_data_registration *registration;
  65   int i;
  66
  67   gdb_assert (fields->data != NULL);
  68
  69   /* Process all the save handlers.  */
  70
  71   for (registration = data_registry->registrations, i = 0;
  72        i < fields->num_data;
  73        registration = registration->next, i++)
  74     if (fields->data[i] != NULL && registration->data->save != NULL)
  75       adaptor (registration->data->save, container, fields->data[i]);
  76
  77   /* Now process all the free handlers.  */
  78
  79   for (registration = data_registry->registrations, i = 0;
  80        i < fields->num_data;
  81        registration = registration->next, i++)
  82     if (fields->data[i] != NULL && registration->data->free != NULL)
  83       adaptor (registration->data->free, container, fields->data[i]);
  84
  85   memset (fields->data, 0, fields->num_data * sizeof (void *));
  86 }
  87
  88 void
  89 registry_container_free_data (struct registry_data_registry *data_registry,
  90                               registry_callback_adaptor adaptor,
  91                               struct registry_container *container,
  92                               struct registry_fields *fields)
  93 {
  94   void ***rdata = &fields->data;
  95   gdb_assert (*rdata != NULL);
  96   registry_clear_data (data_registry, adaptor, container, fields);
  97   xfree (*rdata);
  98   *rdata = NULL;
  99 }
 100
 101 void
 102 registry_set_data (struct registry_fields *fields,
 103                    const struct registry_data *data,
 104                    void *value)
 105 {
 106   gdb_assert (data->index < fields->num_data);
 107   fields->data[data->index] = value;
 108 }
 109
 110 void *
 111 registry_data (struct registry_fields *fields,
 112                const struct registry_data *data)
 113 {
 114   gdb_assert (data->index < fields->num_data);
 115   return fields->data[data->index];
 116 }