GNUnet  0.11.x
gnunet-service-messenger_list_handles.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2020 GNUnet e.V.
4 
5  GNUnet is free software: you can redistribute it and/or modify it
6  under the terms of the GNU Affero General Public License as published
7  by the Free Software Foundation, either version 3 of the License,
8  or (at your option) any later version.
9 
10  GNUnet is distributed in the hope that it will be useful, but
11  WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  Affero General Public License for more details.
14 
15  You should have received a copy of the GNU Affero General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>.
17 
18  SPDX-License-Identifier: AGPL3.0-or-later
19  */
27 
29 
30 void
32 {
33  GNUNET_assert(handles);
34 
35  handles->head = NULL;
36  handles->tail = NULL;
37 }
38 
39 void
41 {
42  GNUNET_assert(handles);
43 
44  while (handles->head)
45  {
46  struct GNUNET_MESSENGER_ListHandle *element = handles->head;
47 
48  GNUNET_CONTAINER_DLL_remove(handles->head, handles->tail, element);
49  destroy_handle (element->handle);
50  GNUNET_free(element);
51  }
52 
53  handles->head = NULL;
54  handles->tail = NULL;
55 }
56 
57 void
59 {
61 
62  element->handle = handle;
63 
64  GNUNET_CONTAINER_DLL_insert_tail(handles->head, handles->tail, element);
65 }
66 
67 int
69 {
70  struct GNUNET_MESSENGER_ListHandle *element;
71 
72  for (element = handles->head; element; element = element->next)
73  if (element->handle == handle)
74  break;
75 
76  if (!element)
77  return GNUNET_NO;
78 
79  GNUNET_CONTAINER_DLL_remove(handles->head, handles->tail, element);
80  GNUNET_free(element);
81 
82  return GNUNET_YES;
83 }
84 
85 void*
87 {
88  struct GNUNET_MESSENGER_ListHandle *element;
89 
90  for (element = handles->head; element; element = element->next)
91  if (get_handle_member_id ((struct GNUNET_MESSENGER_SrvHandle*) element->handle, key))
92  return element->handle;
93 
94  return NULL;
95 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_MESSENGER_ListHandle * tail
#define GNUNET_new(type)
Allocate a struct or union of the given type.
GNUnet MESSENGER service.
struct GNUNET_MESSENGER_ListHandle * next
void add_list_handle(struct GNUNET_MESSENGER_ListHandles *handles, void *handle)
Adds a specific handle to the end of the list.
static struct GNUNET_DNS_Handle * handle
Handle to transport service.
A 512-bit hashcode.
void clear_list_handles(struct GNUNET_MESSENGER_ListHandles *handles)
Destroys remaining handles and clears the list.
void init_list_handles(struct GNUNET_MESSENGER_ListHandles *handles)
Initializes list of handles as empty list.
struct GNUNET_HashCode key
The key used in the DHT.
#define GNUNET_CONTAINER_DLL_insert_tail(head, tail, element)
Insert an element at the tail of a DLL.
void destroy_handle(struct GNUNET_MESSENGER_SrvHandle *handle)
Destroys a handle and frees its memory fully.
GNUnet MESSENGER service.
const struct GNUNET_ShortHashCode * get_handle_member_id(const struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_HashCode *key)
Returns the member id of a given handle in a specific room.
struct GNUNET_MESSENGER_ListHandle * head
int remove_list_handle(struct GNUNET_MESSENGER_ListHandles *handles, void *handle)
Removes the first entry matching with a specific handle from the list and returns GNUNET_YES on succe...
#define GNUNET_free(ptr)
Wrapper around free.
void * find_list_handle_by_member(struct GNUNET_MESSENGER_ListHandles *handles, const struct GNUNET_HashCode *key)
Searches linearly through the list of handles for members of a specific room which is identified by a...