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/>.
27 #include "sigrok-internal.h"
30 extern GIOChannel channels[2];
36 sr_receive_data_callback cb;
40 /* There can only be one session at a time. */
41 /* 'session' is not static, it's used elsewhere (via 'extern'). */
42 struct sr_session *session;
43 static int num_sources = 0;
45 static struct source *sources = NULL;
46 static int source_timeout = -1;
48 struct sr_session *sr_session_new(void)
50 session = calloc(1, sizeof(struct sr_session));
55 void sr_session_destroy(void)
57 g_slist_free(session->devices);
59 /* TODO: Loop over protocol decoders and free them. */
64 void sr_session_device_clear(void)
66 g_slist_free(session->devices);
67 session->devices = NULL;
70 int sr_session_device_add(struct sr_device *device)
74 if (device->plugin && device->plugin->opendev) {
75 ret = device->plugin->opendev(device->plugin_index);
80 session->devices = g_slist_append(session->devices, device);
86 void sr_session_pa_clear(void)
89 * The protocols are pointers to the global set of PA plugins,
92 g_slist_free(session->analyzers);
93 session->analyzers = NULL;
96 void sr_session_pa_add(struct sr_analyzer *an)
98 session->analyzers = g_slist_append(session->analyzers, an);
102 void sr_session_datafeed_callback_clear(void)
104 g_slist_free(session->datafeed_callbacks);
105 session->datafeed_callbacks = NULL;
108 void sr_session_datafeed_callback_add(sr_datafeed_callback callback)
110 session->datafeed_callbacks =
111 g_slist_append(session->datafeed_callbacks, callback);
114 static void sr_session_run_poll()
116 GPollFD *fds, my_gpollfd;
120 while (session->running) {
124 /* Construct g_poll()'s array. */
125 fds = malloc(sizeof(GPollFD) * num_sources);
126 for (i = 0; i < num_sources; i++) {
128 g_io_channel_win32_make_pollfd(&channels[0],
129 sources[i].events, &my_gpollfd);
131 my_gpollfd.fd = sources[i].fd;
132 my_gpollfd.events = sources[i].events;
137 ret = g_poll(fds, num_sources, source_timeout);
139 for (i = 0; i < num_sources; i++) {
140 if (fds[i].revents > 0 || (ret == 0
141 && source_timeout == sources[i].timeout)) {
143 * Invoke the source's callback on an event,
144 * or if the poll timeout out and this source
145 * asked for that timeout.
147 if (!sources[i].cb(fds[i].fd, fds[i].revents,
148 sources[i].user_data))
149 sr_session_source_remove(sources[i].fd);
156 int sr_session_start(void)
158 struct sr_device *device;
162 sr_info("session: starting");
163 for (l = session->devices; l; l = l->next) {
165 if ((ret = device->plugin->start_acquisition(
166 device->plugin_index, device)) != SR_OK)
173 void sr_session_run(void)
175 sr_info("session: running");
176 session->running = TRUE;
178 /* do we have real sources? */
179 if (num_sources == 1 && sources[0].fd == -1)
180 /* dummy source, freewheel over it */
181 while (session->running)
182 sources[0].cb(-1, 0, sources[0].user_data);
184 /* real sources, use g_poll() main loop */
185 sr_session_run_poll();
188 void sr_session_halt(void)
190 sr_info("session: halting");
191 session->running = FALSE;
194 void sr_session_stop(void)
196 struct sr_device *device;
199 sr_info("session: stopping");
200 session->running = FALSE;
201 for (l = session->devices; l; l = l->next) {
203 if (device->plugin && device->plugin->stop_acquisition)
204 device->plugin->stop_acquisition(device->plugin_index, device);
208 static void datafeed_dump(struct sr_datafeed_packet *packet)
210 struct sr_datafeed_logic *logic;
212 switch (packet->type) {
214 sr_dbg("bus: received SR_DF_HEADER");
217 sr_dbg("bus: received SR_DF_TRIGGER at %lu ms",
218 packet->timeoffset / 1000000);
221 logic = packet->payload;
222 sr_dbg("bus: received SR_DF_LOGIC at %f ms duration %f ms, %"PRIu64" bytes",
223 packet->timeoffset / 1000000.0, packet->duration / 1000000.0,
227 sr_dbg("bus: received SR_DF_END");
230 sr_dbg("bus: received unknown packet type %d", packet->type);
234 void sr_session_bus(struct sr_device *device, struct sr_datafeed_packet *packet)
237 sr_datafeed_callback cb;
240 * TODO: Send packet through PD pipe, and send the output of that to
241 * the callbacks as well.
243 for (l = session->datafeed_callbacks; l; l = l->next) {
245 datafeed_dump(packet);
250 void sr_session_source_add(int fd, int events, int timeout,
251 sr_receive_data_callback callback, void *user_data)
253 struct source *new_sources, *s;
255 new_sources = calloc(1, sizeof(struct source) * (num_sources + 1));
258 memcpy(new_sources, sources,
259 sizeof(struct source) * num_sources);
263 s = &new_sources[num_sources++];
266 s->timeout = timeout;
268 s->user_data = user_data;
269 sources = new_sources;
271 if (timeout != source_timeout && timeout > 0
272 && (source_timeout == -1 || timeout < source_timeout))
273 source_timeout = timeout;
276 void sr_session_source_remove(int fd)
278 struct source *new_sources;
284 new_sources = calloc(1, sizeof(struct source) * num_sources);
285 for (old = 0, new = 0; old < num_sources; old++)
286 if (sources[old].fd != fd)
287 memcpy(&new_sources[new++], &sources[old],
288 sizeof(struct source));
292 sources = new_sources;
295 /* Target fd was not found. */