2 * @file frescan_servers.h
4 * @brief FRESCAN sporadic servers
15 * This file contains the FRESCAN sporadic servers that allow to isolate
16 * different streams of data by assigning them a budget and replenishment
21 * -----------------------------------------------------------------------
22 * Copyright (C) 2006 - 2008 FRESCOR consortium partners:
24 * Universidad de Cantabria, SPAIN
25 * University of York, UK
26 * Scuola Superiore Sant'Anna, ITALY
27 * Kaiserslautern University, GERMANY
28 * Univ. Politécnica Valencia, SPAIN
29 * Czech Technical University in Prague, CZECH REPUBLIC
31 * Thales Communication S.A. FRANCE
32 * Visual Tools S.A. SPAIN
33 * Rapita Systems Ltd UK
36 * See http://www.frescor.org for a link to partners' websites
38 * FRESCOR project (FP6/2005/IST/5-034026) is funded
39 * in part by the European Union Sixth Framework Programme
40 * The European Union is not liable of any use that may be
43 * This file is part of FRESCAN
45 * FRESCAN is free software; you can redistribute it and/or modify
46 * it under the terms of the GNU General Public License as published by
47 * the Free Software Foundation; either version 2, or (at your option)
50 * FRESCAN is distributed in the hope that it will be useful, but
51 * WITHOUT ANY WARRANTY; without even the implied warranty of
52 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
53 * General Public License for more details.
55 * You should have received a copy of the GNU General Public License
56 * distributed with FRESCAN; see file COPYING. If not, write to the
57 * Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
60 * As a special exception, including FRESCAN header files in a file,
61 * instantiating FRESCAN generics or templates, or linking other files
62 * with FRESCAN objects to produce an executable application, does not
63 * by itself cause the resulting executable application to be covered
64 * by the GNU General Public License. This exception does not
65 * however invalidate any other reasons why the executable file might be
66 * covered by the GNU Public License.
67 * -----------------------------------------------------------------------
71 #ifndef _MARTE_FRESCAN_SERVERS_H_
72 #define _MARTE_FRESCAN_SERVERS_H_
74 #include "frescan_types.h"
77 * frescan_servers_init() - initialize server structures
79 * @net: the network instance
82 extern int frescan_servers_init(frescan_network_t net);
85 * frescan_servers_create() - create a sporadic server
87 * @net: the network instance
88 * @params: the parameters for the server
89 * @id: the identificator for the server as a return value
93 extern int frescan_servers_create(frescan_network_t net,
94 const frescan_server_params_t *params,
98 * frescan_servers_set_perceived() - update a sporadic server perceived data
100 * @net: the network instance
101 * @params: the parameters for the server
102 * @id: the identificator for the server
106 extern int frescan_servers_set_perceived(frescan_network_t net,
107 const frescan_server_params_t *params,
111 * frescan_servers_commit_perceived() - commit sporadic server perceived data
113 * @net: the network instance
114 * @params: the parameters for the server
115 * @id: the identificator for the server
119 extern int frescan_servers_commit_perceived(frescan_network_t net,
123 * frescan_servers_update() - update a sporadic server data
125 * It is similar to call 'frescan_servers_set_perceived' and then
126 * 'frescan_servers_commit_perceived'
128 * @net: the network instance
129 * @params: the parameters for the server
130 * @id: the identificator for the server
134 extern int frescan_servers_update(frescan_network_t net,
135 const frescan_server_params_t *params,
139 * frescan_servers_destroy() - delete a sporadic server
141 * @net: the network instance
142 * @id: the identificator for the server
146 extern int frescan_servers_destroy(frescan_network_t net, frescan_ss_t id);
149 * frescan_servers_get_data() - get a sporadic server data
151 * @net: the network instance
152 * @params: the parameters of the server
153 * @id: the identificator for the server
157 extern int frescan_servers_get_data(frescan_network_t net,
158 frescan_server_params_t *params,
162 * frescan_servers_get_current_budget() - get the current sporadic server budget
164 * @net: the network instance
165 * @id: the identificator for the server
166 * @current_budget: the current budget of the server
170 extern int frescan_servers_get_current_budget(frescan_network_t net,
172 frescan_budget_t *current_budget);
175 * frescan_servers_get_highest_prio() - get the server with highest priority
177 * @net: the network instance
178 * @id: the identificator for the server
179 * @prio: the priority of that server
181 * If "id" is returned with a value of FRESCAN_MX_IDS,
182 * there are no active servers.
183 * NOTE: id=FRESCAN_MX_IDS is the identifier for fixed priority messages
187 extern int frescan_servers_get_highest_prio(frescan_network_t net,
189 frescan_prio_t *prio);
192 * frescan_servers_frame_sent() - hook to control the server budget and prio
194 * @net: the network instance
195 * @id: the identificator for the server
196 * @packet: the packet sent (with its timestamp)
198 * This function is called when a frame has been effectively sent through the
199 * CAN bus and that frame is associated to a certain server. The function
200 * decreases the capacity of the server and sets the priority to background
201 * in case the budget is exhausted.
203 * NOTE: the replenishment operation is programmed using the corresponding
204 * function at frescan_servers_replenishments module
207 extern int frescan_servers_frame_sent(frescan_network_t net,
209 frescan_packet_t *packet);
211 #endif // _MARTE_FRESCAN_SERVERS_H_