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a1bb33af UH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 Bert Vermeulen <bert@biot.com> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
22b02383 | 20 | #include "config.h" |
a1bb33af UH |
21 | #include <stdio.h> |
22 | #include <stdlib.h> | |
23 | #include <unistd.h> | |
24 | #include <string.h> | |
544a4582 | 25 | #include <glib.h> |
62c82025 | 26 | #include <sigrok.h> |
b08024a8 | 27 | #include <sigrok-internal.h> |
aa4b1107 | 28 | |
9f4bc44e UH |
29 | /* demo.c */ |
30 | extern GIOChannel channels[2]; | |
a1bb33af | 31 | |
544a4582 BV |
32 | struct source { |
33 | int fd; | |
34 | int events; | |
35 | int timeout; | |
a887e3da | 36 | sr_receive_data_callback cb; |
544a4582 BV |
37 | void *user_data; |
38 | }; | |
39 | ||
7d658874 | 40 | /* There can only be one session at a time. */ |
2872d21e | 41 | struct sr_session *session; |
7d658874 BV |
42 | int num_sources = 0; |
43 | ||
544a4582 BV |
44 | struct source *sources = NULL; |
45 | int source_timeout = -1; | |
46 | ||
47 | ||
8a2efef2 | 48 | struct sr_session *sr_session_new(void) |
a1bb33af | 49 | { |
2872d21e | 50 | session = calloc(1, sizeof(struct sr_session)); |
a1bb33af UH |
51 | |
52 | return session; | |
53 | } | |
54 | ||
8a2efef2 | 55 | void sr_session_destroy(void) |
a1bb33af | 56 | { |
8722c31e | 57 | |
a1bb33af UH |
58 | g_slist_free(session->devices); |
59 | ||
aa4b1107 | 60 | /* TODO: Loop over protocol decoders and free them. */ |
a1bb33af UH |
61 | |
62 | g_free(session); | |
a1bb33af UH |
63 | } |
64 | ||
8a2efef2 | 65 | void sr_session_device_clear(void) |
a1bb33af | 66 | { |
a1bb33af UH |
67 | g_slist_free(session->devices); |
68 | session->devices = NULL; | |
a1bb33af UH |
69 | } |
70 | ||
8a2efef2 | 71 | int sr_session_device_add(struct sr_device *device) |
a1bb33af UH |
72 | { |
73 | int ret; | |
74 | ||
86f5e3d8 UH |
75 | if (device->plugin && device->plugin->opendev) { |
76 | ret = device->plugin->opendev(device->plugin_index); | |
e46b8fb1 | 77 | if (ret != SR_OK) |
aa4b1107 BV |
78 | return ret; |
79 | } | |
a1bb33af | 80 | |
aa4b1107 BV |
81 | session->devices = g_slist_append(session->devices, device); |
82 | ||
e46b8fb1 | 83 | return SR_OK; |
a1bb33af UH |
84 | } |
85 | ||
8bb416be | 86 | #if 0 |
8a2efef2 | 87 | void sr_session_pa_clear(void) |
a1bb33af | 88 | { |
62c82025 UH |
89 | /* |
90 | * The protocols are pointers to the global set of PA plugins, | |
91 | * so don't free them. | |
92 | */ | |
a1bb33af UH |
93 | g_slist_free(session->analyzers); |
94 | session->analyzers = NULL; | |
a1bb33af UH |
95 | } |
96 | ||
809c5f20 | 97 | void sr_session_pa_add(struct sr_analyzer *an) |
a1bb33af | 98 | { |
a1bb33af | 99 | session->analyzers = g_slist_append(session->analyzers, an); |
a1bb33af | 100 | } |
8bb416be | 101 | #endif |
a1bb33af | 102 | |
8a2efef2 | 103 | void sr_session_datafeed_callback_clear(void) |
a1bb33af | 104 | { |
a1bb33af UH |
105 | g_slist_free(session->datafeed_callbacks); |
106 | session->datafeed_callbacks = NULL; | |
a1bb33af UH |
107 | } |
108 | ||
13b05733 | 109 | void sr_session_datafeed_callback_add(sr_datafeed_callback callback) |
a1bb33af | 110 | { |
62c82025 UH |
111 | session->datafeed_callbacks = |
112 | g_slist_append(session->datafeed_callbacks, callback); | |
a1bb33af UH |
113 | } |
114 | ||
8a2efef2 | 115 | static void sr_session_run_poll() |
544a4582 BV |
116 | { |
117 | GPollFD *fds, my_gpollfd; | |
118 | int ret, i; | |
119 | ||
544a4582 BV |
120 | fds = NULL; |
121 | while (session->running) { | |
122 | if (fds) | |
123 | free(fds); | |
124 | ||
125 | /* Construct g_poll()'s array. */ | |
126 | fds = malloc(sizeof(GPollFD) * num_sources); | |
127 | for (i = 0; i < num_sources; i++) { | |
128 | #ifdef _WIN32 | |
129 | g_io_channel_win32_make_pollfd(&channels[0], | |
130 | sources[i].events, &my_gpollfd); | |
131 | #else | |
132 | my_gpollfd.fd = sources[i].fd; | |
133 | my_gpollfd.events = sources[i].events; | |
134 | fds[i] = my_gpollfd; | |
135 | #endif | |
136 | } | |
137 | ||
138 | ret = g_poll(fds, num_sources, source_timeout); | |
139 | ||
140 | for (i = 0; i < num_sources; i++) { | |
141 | if (fds[i].revents > 0 || (ret == 0 | |
142 | && source_timeout == sources[i].timeout)) { | |
143 | /* | |
144 | * Invoke the source's callback on an event, | |
145 | * or if the poll timeout out and this source | |
146 | * asked for that timeout. | |
147 | */ | |
5c582d9f GM |
148 | if (!sources[i].cb(fds[i].fd, fds[i].revents, |
149 | sources[i].user_data)) | |
150 | sr_session_source_remove(sources[i].fd); | |
544a4582 BV |
151 | } |
152 | } | |
153 | } | |
154 | free(fds); | |
155 | ||
156 | } | |
157 | ||
8a2efef2 | 158 | int sr_session_start(void) |
7d658874 BV |
159 | { |
160 | struct sr_device *device; | |
161 | GSList *l; | |
162 | int ret; | |
163 | ||
b08024a8 | 164 | sr_info("session: starting"); |
7d658874 BV |
165 | for (l = session->devices; l; l = l->next) { |
166 | device = l->data; | |
167 | if ((ret = device->plugin->start_acquisition( | |
168 | device->plugin_index, device)) != SR_OK) | |
169 | break; | |
170 | } | |
171 | ||
172 | return ret; | |
173 | } | |
174 | ||
8a2efef2 | 175 | void sr_session_run(void) |
7d658874 BV |
176 | { |
177 | ||
b08024a8 | 178 | sr_info("session: running"); |
7d658874 BV |
179 | session->running = TRUE; |
180 | ||
181 | /* do we have real sources? */ | |
182 | if (num_sources == 1 && sources[0].fd == -1) | |
183 | /* dummy source, freewheel over it */ | |
184 | while (session->running) | |
185 | sources[0].cb(-1, 0, sources[0].user_data); | |
186 | else | |
187 | /* real sources, use g_poll() main loop */ | |
8a2efef2 | 188 | sr_session_run_poll(); |
7d658874 BV |
189 | |
190 | } | |
191 | ||
8a2efef2 | 192 | void sr_session_halt(void) |
544a4582 BV |
193 | { |
194 | ||
b08024a8 | 195 | sr_info("session: halting"); |
544a4582 BV |
196 | session->running = FALSE; |
197 | ||
198 | } | |
199 | ||
8a2efef2 | 200 | void sr_session_stop(void) |
a1bb33af | 201 | { |
5c2d46d1 | 202 | struct sr_device *device; |
a1bb33af UH |
203 | GSList *l; |
204 | ||
b08024a8 | 205 | sr_info("session: stopping"); |
544a4582 | 206 | session->running = FALSE; |
62c82025 | 207 | for (l = session->devices; l; l = l->next) { |
a1bb33af | 208 | device = l->data; |
b8c2f85f | 209 | if (device->plugin && device->plugin->stop_acquisition) |
aa4b1107 | 210 | device->plugin->stop_acquisition(device->plugin_index, device); |
a1bb33af | 211 | } |
544a4582 | 212 | |
a1bb33af UH |
213 | } |
214 | ||
7d2afd6c BV |
215 | static void datafeed_dump(struct sr_datafeed_packet *packet) |
216 | { | |
217 | struct sr_datafeed_logic *logic; | |
218 | ||
219 | switch (packet->type) { | |
220 | case SR_DF_HEADER: | |
221 | sr_dbg("bus: received SR_DF_HEADER"); | |
222 | break; | |
223 | case SR_DF_TRIGGER: | |
224 | sr_dbg("bus: received SR_DF_TRIGGER at %lu ms", | |
225 | packet->timeoffset / 1000000); | |
226 | break; | |
227 | case SR_DF_LOGIC: | |
228 | logic = packet->payload; | |
229 | sr_dbg("bus: received SR_DF_LOGIC at %f ms duration %f ms, %"PRIu64" bytes", | |
230 | packet->timeoffset / 1000000.0, packet->duration / 1000000.0, | |
231 | logic->length); | |
232 | break; | |
233 | case SR_DF_END: | |
234 | sr_dbg("bus: received SR_DF_END"); | |
235 | break; | |
236 | default: | |
237 | sr_dbg("bus: received unknown packet type %d", packet->type); | |
238 | } | |
239 | ||
240 | } | |
241 | ||
8a2efef2 | 242 | void sr_session_bus(struct sr_device *device, struct sr_datafeed_packet *packet) |
a1bb33af UH |
243 | { |
244 | GSList *l; | |
13b05733 | 245 | sr_datafeed_callback cb; |
a1bb33af | 246 | |
62c82025 | 247 | /* |
aa4b1107 | 248 | * TODO: Send packet through PD pipe, and send the output of that to |
62c82025 | 249 | * the callbacks as well. |
a1bb33af | 250 | */ |
62c82025 | 251 | for (l = session->datafeed_callbacks; l; l = l->next) { |
a1bb33af | 252 | cb = l->data; |
7d2afd6c | 253 | datafeed_dump(packet); |
a1bb33af UH |
254 | cb(device, packet); |
255 | } | |
a1bb33af UH |
256 | } |
257 | ||
8a2efef2 | 258 | void sr_session_source_add(int fd, int events, int timeout, |
a887e3da | 259 | sr_receive_data_callback callback, void *user_data) |
544a4582 BV |
260 | { |
261 | struct source *new_sources, *s; | |
262 | ||
263 | new_sources = calloc(1, sizeof(struct source) * (num_sources + 1)); | |
264 | ||
265 | if (sources) { | |
266 | memcpy(new_sources, sources, | |
267 | sizeof(struct source) * num_sources); | |
268 | free(sources); | |
269 | } | |
270 | ||
271 | s = &new_sources[num_sources++]; | |
272 | s->fd = fd; | |
273 | s->events = events; | |
274 | s->timeout = timeout; | |
275 | s->cb = callback; | |
276 | s->user_data = user_data; | |
277 | sources = new_sources; | |
278 | ||
279 | if (timeout != source_timeout && timeout > 0 | |
280 | && (source_timeout == -1 || timeout < source_timeout)) | |
281 | source_timeout = timeout; | |
282 | } | |
283 | ||
8a2efef2 | 284 | void sr_session_source_remove(int fd) |
544a4582 BV |
285 | { |
286 | struct source *new_sources; | |
287 | int old, new; | |
288 | ||
289 | if (!sources) | |
290 | return; | |
291 | ||
292 | new_sources = calloc(1, sizeof(struct source) * num_sources); | |
5c582d9f | 293 | for (old = 0, new = 0; old < num_sources; old++) |
544a4582 BV |
294 | if (sources[old].fd != fd) |
295 | memcpy(&new_sources[new++], &sources[old], | |
296 | sizeof(struct source)); | |
297 | ||
298 | if (old != new) { | |
299 | free(sources); | |
300 | sources = new_sources; | |
301 | num_sources--; | |
302 | } else { | |
303 | /* Target fd was not found. */ | |
304 | free(new_sources); | |
305 | } | |
306 | } | |
307 |