2 This file is part of GNUnet.
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.
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.
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/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
22 * @file rps/rps-sampler_client.h
23 * @brief client sampler implementation
24 * @author Julius Bünger
27 #ifndef RPS_SAMPLER_CLIENT_H
28 #define RPS_SAMPLER_CLIENT_H
30 #include "rps-sampler_common.h"
34 * A sampler sampling a stream of PeerIDs.
39 * A handle to cancel a request.
41 struct RPS_SamplerRequestHandle;
44 * Closure to _get_rand_peer_info()
46 struct RPS_SamplerRequestHandleSingleInfo;
50 * Get the size of the sampler.
52 * @param sampler the sampler to return the size of.
53 * @return the size of the sampler
56 RPS_sampler_get_size (struct RPS_Sampler *sampler);
60 * Grow or shrink the size of the sampler.
62 * @param sampler the sampler to resize.
63 * @param new_size the new size of the sampler (not 0)
66 RPS_sampler_resize (struct RPS_Sampler *sampler, unsigned int new_size);
70 * Initialise a modified tuple of sampler elements.
72 * @param init_size the size the sampler is initialised with
73 * @param max_round_interval maximum time a round takes
74 * @return a handle to a sampler that consists of sampler elements.
77 RPS_sampler_mod_init (size_t init_size,
78 struct GNUNET_TIME_Relative max_round_interval);
82 * Update every sampler element of this sampler with given peer
84 * @param sampler the sampler to update.
85 * @param id the PeerID that is put in the sampler
88 RPS_sampler_update (struct RPS_Sampler *sampler,
89 const struct GNUNET_PeerIdentity *id);
93 * Reinitialise all previously initialised sampler elements with the given
96 * Used to get rid of a PeerID.
98 * @param sampler the sampler to reinitialise a sampler in.
99 * @param id the id of the samplers to update.
102 RPS_sampler_reinitialise_by_value (struct RPS_Sampler *sampler,
103 const struct GNUNET_PeerIdentity *id);
107 * Get n random peers out of the sampled peers.
109 * We might want to reinitialise this sampler after giving the
110 * corrsponding peer to the client.
111 * Random with or without consumption?
113 * @param sampler the sampler to get peers from.
114 * @param cb callback that will be called once the ids are ready.
115 * @param cls closure given to @a cb
116 * @param num_peers the number of peers requested
118 struct RPS_SamplerRequestHandle *
119 RPS_sampler_get_n_rand_peers (struct RPS_Sampler *sampler,
121 RPS_sampler_n_rand_peers_ready_cb cb,
126 * Cancle a request issued through #RPS_sampler_n_rand_peers_ready_cb.
128 * @param req_handle the handle to the request
131 RPS_sampler_request_cancel (struct RPS_SamplerRequestHandle *req_handle);
135 * Counts how many Samplers currently hold a given PeerID.
137 * @param sampler the sampler to cound ids in.
138 * @param id the PeerID to count.
140 * @return the number of occurrences of id.
143 RPS_sampler_count_id (struct RPS_Sampler *sampler,
144 const struct GNUNET_PeerIdentity *id);
148 * Cleans the samplers.
150 * @param sampler the sampler to destroy.
153 RPS_sampler_destroy (struct RPS_Sampler *sampler);
155 #endif /* RPS_SAMPLER_CLIENT_H */
156 /* end of gnunet-service-rps.c */