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