2 * This file is part of the sigrok project.
4 * Copyright (C) 2010 Bert Vermeulen <bert@biot.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
29 extern GIOChannel channels[2];
35 receive_data_callback cb;
39 /* There can only be one session at a time. */
40 struct sr_session *session;
43 struct source *sources = NULL;
44 int source_timeout = -1;
47 struct sr_session *sr_session_new(void)
49 session = calloc(1, sizeof(struct sr_session));
54 void sr_session_destroy(void)
56 g_slist_free(session->devices);
58 /* TODO: Loop over protocol decoders and free them. */
63 void sr_session_device_clear(void)
65 g_slist_free(session->devices);
66 session->devices = NULL;
69 int sr_session_device_add(struct sr_device *device)
73 if (device->plugin && device->plugin->open) {
74 ret = device->plugin->open(device->plugin_index);
79 session->devices = g_slist_append(session->devices, device);
84 void sr_session_pa_clear(void)
87 * The protocols are pointers to the global set of PA plugins,
90 g_slist_free(session->analyzers);
91 session->analyzers = NULL;
94 void sr_session_pa_add(struct analyzer *an)
96 session->analyzers = g_slist_append(session->analyzers, an);
99 void sr_session_datafeed_callback_clear(void)
101 g_slist_free(session->datafeed_callbacks);
102 session->datafeed_callbacks = NULL;
105 void sr_session_datafeed_callback_add(datafeed_callback callback)
107 session->datafeed_callbacks =
108 g_slist_append(session->datafeed_callbacks, callback);
111 static void sr_session_run_poll()
113 GPollFD *fds, my_gpollfd;
117 while (session->running) {
121 /* Construct g_poll()'s array. */
122 fds = malloc(sizeof(GPollFD) * num_sources);
123 for (i = 0; i < num_sources; i++) {
125 g_io_channel_win32_make_pollfd(&channels[0],
126 sources[i].events, &my_gpollfd);
128 my_gpollfd.fd = sources[i].fd;
129 my_gpollfd.events = sources[i].events;
134 ret = g_poll(fds, num_sources, source_timeout);
136 for (i = 0; i < num_sources; i++) {
137 if (fds[i].revents > 0 || (ret == 0
138 && source_timeout == sources[i].timeout)) {
140 * Invoke the source's callback on an event,
141 * or if the poll timeout out and this source
142 * asked for that timeout.
144 sources[i].cb(fds[i].fd, fds[i].revents,
145 sources[i].user_data);
153 int sr_session_start(void)
155 struct sr_device *device;
159 g_message("session: starting");
160 for (l = session->devices; l; l = l->next) {
162 if ((ret = device->plugin->start_acquisition(
163 device->plugin_index, device)) != SR_OK)
170 void sr_session_run(void)
173 g_message("session: running");
174 session->running = TRUE;
176 /* do we have real sources? */
177 if (num_sources == 1 && sources[0].fd == -1)
178 /* dummy source, freewheel over it */
179 while (session->running)
180 sources[0].cb(-1, 0, sources[0].user_data);
182 /* real sources, use g_poll() main loop */
183 sr_session_run_poll();
187 void sr_session_halt(void)
190 g_message("session: halting");
191 session->running = FALSE;
195 void sr_session_stop(void)
197 struct sr_device *device;
200 g_message("session: stopping");
201 session->running = FALSE;
202 for (l = session->devices; l; l = l->next) {
204 if (device->plugin && device->plugin->stop_acquisition)
205 device->plugin->stop_acquisition(device->plugin_index, device);
210 void sr_session_bus(struct sr_device *device, struct sr_datafeed_packet *packet)
213 datafeed_callback cb;
216 * TODO: Send packet through PD pipe, and send the output of that to
217 * the callbacks as well.
219 for (l = session->datafeed_callbacks; l; l = l->next) {
225 void sr_session_source_add(int fd, int events, int timeout,
226 receive_data_callback callback, void *user_data)
228 struct source *new_sources, *s;
230 new_sources = calloc(1, sizeof(struct source) * (num_sources + 1));
233 memcpy(new_sources, sources,
234 sizeof(struct source) * num_sources);
238 s = &new_sources[num_sources++];
241 s->timeout = timeout;
243 s->user_data = user_data;
244 sources = new_sources;
246 if (timeout != source_timeout && timeout > 0
247 && (source_timeout == -1 || timeout < source_timeout))
248 source_timeout = timeout;
251 void sr_session_source_remove(int fd)
253 struct source *new_sources;
259 new_sources = calloc(1, sizeof(struct source) * num_sources);
260 for (old = 0; old < num_sources; old++)
261 if (sources[old].fd != fd)
262 memcpy(&new_sources[new++], &sources[old],
263 sizeof(struct source));
267 sources = new_sources;
270 /* Target fd was not found. */