gnunet-service-messenger_list_handles.c

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/*
   This file is part of GNUnet.
   Copyright (C) 2020--2023 GNUnet e.V.
 
   GNUnet is free software: you can redistribute it and/or modify it
   under the terms of the GNU Affero General Public License as published
   by the Free Software Foundation, either version 3 of the License,
   or (at your option) any later version.
 
   GNUnet is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Affero General Public License for more details.
 
   You should have received a copy of the GNU Affero General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
   SPDX-License-Identifier: AGPL3.0-or-later
 */
#include "gnunet-service-messenger_list_handles.h"
 
#include "gnunet-service-messenger_handle.h"
 
void
init_list_handles (struct GNUNET_MESSENGER_ListHandles *handles)
{
  GNUNET_assert (handles);
 
  handles->head = NULL;
  handles->tail = NULL;
}
 
 
void
clear_list_handles (struct GNUNET_MESSENGER_ListHandles *handles)
{
  GNUNET_assert (handles);
 
  while (handles->head)
  {
    struct GNUNET_MESSENGER_ListHandle *element = handles->head;
 
    GNUNET_CONTAINER_DLL_remove (handles->head, handles->tail, element);
    destroy_srv_handle (element->handle);
    GNUNET_free (element);
  }
 
  handles->head = NULL;
  handles->tail = NULL;
}
 
 
void
add_list_handle (struct GNUNET_MESSENGER_ListHandles *handles,
                 struct GNUNET_MESSENGER_SrvHandle *handle)
{
  GNUNET_assert ((handles) && (handle));
 
  struct GNUNET_MESSENGER_ListHandle *element = GNUNET_new (struct
                                                            GNUNET_MESSENGER_ListHandle);
 
  element->handle = handle;
 
  GNUNET_CONTAINER_DLL_insert_tail (handles->head, handles->tail, element);
}
 
 
enum GNUNET_GenericReturnValue
remove_list_handle (struct GNUNET_MESSENGER_ListHandles *handles,
                    struct GNUNET_MESSENGER_SrvHandle *handle)
{
  GNUNET_assert ((handles) && (handle));
 
  struct GNUNET_MESSENGER_ListHandle *element;
 
  for (element = handles->head; element; element = element->next)
    if (element->handle == handle)
      break;
 
  if (! element)
    return GNUNET_NO;
 
  GNUNET_CONTAINER_DLL_remove (handles->head, handles->tail, element);
  GNUNET_free (element);
 
  return GNUNET_YES;
}
 
 
struct GNUNET_MESSENGER_SrvHandle*
find_list_handle_by_member (const struct GNUNET_MESSENGER_ListHandles *handles,
                            const struct GNUNET_HashCode *key)
{
  GNUNET_assert ((handles) && (key));
 
  struct GNUNET_MESSENGER_ListHandle *element;
  struct GNUNET_MESSENGER_SrvHandle *handle = NULL;
 
  for (element = handles->head; element; element = element->next)
  {
    if (get_srv_handle_member_id ((struct
                                   GNUNET_MESSENGER_SrvHandle *) element->handle,
                                  key))
      handle = (struct GNUNET_MESSENGER_SrvHandle *) element->handle;
 
    if ((handle) && (GNUNET_YES == is_srv_handle_routing (handle, key)))
      break;
  }
 
  return handle;
}