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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> |
aa4b1107 | 27 | |
9f4bc44e UH |
28 | /* demo.c */ |
29 | extern GIOChannel channels[2]; | |
a1bb33af | 30 | |
544a4582 BV |
31 | struct source { |
32 | int fd; | |
33 | int events; | |
34 | int timeout; | |
35 | receive_data_callback cb; | |
36 | void *user_data; | |
37 | }; | |
38 | ||
7d658874 | 39 | /* There can only be one session at a time. */ |
2872d21e | 40 | struct sr_session *session; |
7d658874 BV |
41 | int num_sources = 0; |
42 | ||
544a4582 BV |
43 | struct source *sources = NULL; |
44 | int source_timeout = -1; | |
45 | ||
46 | ||
8a2efef2 | 47 | struct sr_session *sr_session_new(void) |
a1bb33af | 48 | { |
2872d21e | 49 | session = calloc(1, sizeof(struct sr_session)); |
a1bb33af UH |
50 | |
51 | return session; | |
52 | } | |
53 | ||
8a2efef2 | 54 | void sr_session_destroy(void) |
a1bb33af | 55 | { |
a1bb33af UH |
56 | g_slist_free(session->devices); |
57 | ||
aa4b1107 | 58 | /* TODO: Loop over protocol decoders and free them. */ |
a1bb33af UH |
59 | |
60 | g_free(session); | |
a1bb33af UH |
61 | } |
62 | ||
8a2efef2 | 63 | void sr_session_device_clear(void) |
a1bb33af | 64 | { |
a1bb33af UH |
65 | g_slist_free(session->devices); |
66 | session->devices = NULL; | |
a1bb33af UH |
67 | } |
68 | ||
8a2efef2 | 69 | int sr_session_device_add(struct sr_device *device) |
a1bb33af UH |
70 | { |
71 | int ret; | |
72 | ||
aa4b1107 BV |
73 | if (device->plugin && device->plugin->open) { |
74 | ret = device->plugin->open(device->plugin_index); | |
e46b8fb1 | 75 | if (ret != SR_OK) |
aa4b1107 BV |
76 | return ret; |
77 | } | |
a1bb33af | 78 | |
aa4b1107 BV |
79 | session->devices = g_slist_append(session->devices, device); |
80 | ||
e46b8fb1 | 81 | return SR_OK; |
a1bb33af UH |
82 | } |
83 | ||
8a2efef2 | 84 | void sr_session_pa_clear(void) |
a1bb33af | 85 | { |
62c82025 UH |
86 | /* |
87 | * The protocols are pointers to the global set of PA plugins, | |
88 | * so don't free them. | |
89 | */ | |
a1bb33af UH |
90 | g_slist_free(session->analyzers); |
91 | session->analyzers = NULL; | |
a1bb33af UH |
92 | } |
93 | ||
8a2efef2 | 94 | void sr_session_pa_add(struct analyzer *an) |
a1bb33af | 95 | { |
a1bb33af | 96 | session->analyzers = g_slist_append(session->analyzers, an); |
a1bb33af UH |
97 | } |
98 | ||
8a2efef2 | 99 | void sr_session_datafeed_callback_clear(void) |
a1bb33af | 100 | { |
a1bb33af UH |
101 | g_slist_free(session->datafeed_callbacks); |
102 | session->datafeed_callbacks = NULL; | |
a1bb33af UH |
103 | } |
104 | ||
8a2efef2 | 105 | void sr_session_datafeed_callback_add(datafeed_callback callback) |
a1bb33af | 106 | { |
62c82025 UH |
107 | session->datafeed_callbacks = |
108 | g_slist_append(session->datafeed_callbacks, callback); | |
a1bb33af UH |
109 | } |
110 | ||
8a2efef2 | 111 | static void sr_session_run_poll() |
544a4582 BV |
112 | { |
113 | GPollFD *fds, my_gpollfd; | |
114 | int ret, i; | |
115 | ||
544a4582 BV |
116 | fds = NULL; |
117 | while (session->running) { | |
118 | if (fds) | |
119 | free(fds); | |
120 | ||
121 | /* Construct g_poll()'s array. */ | |
122 | fds = malloc(sizeof(GPollFD) * num_sources); | |
123 | for (i = 0; i < num_sources; i++) { | |
124 | #ifdef _WIN32 | |
125 | g_io_channel_win32_make_pollfd(&channels[0], | |
126 | sources[i].events, &my_gpollfd); | |
127 | #else | |
128 | my_gpollfd.fd = sources[i].fd; | |
129 | my_gpollfd.events = sources[i].events; | |
130 | fds[i] = my_gpollfd; | |
131 | #endif | |
132 | } | |
133 | ||
134 | ret = g_poll(fds, num_sources, source_timeout); | |
135 | ||
136 | for (i = 0; i < num_sources; i++) { | |
137 | if (fds[i].revents > 0 || (ret == 0 | |
138 | && source_timeout == sources[i].timeout)) { | |
139 | /* | |
140 | * Invoke the source's callback on an event, | |
141 | * or if the poll timeout out and this source | |
142 | * asked for that timeout. | |
143 | */ | |
144 | sources[i].cb(fds[i].fd, fds[i].revents, | |
7d658874 | 145 | sources[i].user_data); |
544a4582 BV |
146 | } |
147 | } | |
148 | } | |
149 | free(fds); | |
150 | ||
151 | } | |
152 | ||
8a2efef2 | 153 | int sr_session_start(void) |
7d658874 BV |
154 | { |
155 | struct sr_device *device; | |
156 | GSList *l; | |
157 | int ret; | |
158 | ||
159 | g_message("session: starting"); | |
160 | for (l = session->devices; l; l = l->next) { | |
161 | device = l->data; | |
162 | if ((ret = device->plugin->start_acquisition( | |
163 | device->plugin_index, device)) != SR_OK) | |
164 | break; | |
165 | } | |
166 | ||
167 | return ret; | |
168 | } | |
169 | ||
8a2efef2 | 170 | void sr_session_run(void) |
7d658874 BV |
171 | { |
172 | ||
173 | g_message("session: running"); | |
174 | session->running = TRUE; | |
175 | ||
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); | |
181 | else | |
182 | /* real sources, use g_poll() main loop */ | |
8a2efef2 | 183 | sr_session_run_poll(); |
7d658874 BV |
184 | |
185 | } | |
186 | ||
8a2efef2 | 187 | void sr_session_halt(void) |
544a4582 BV |
188 | { |
189 | ||
7d658874 | 190 | g_message("session: halting"); |
544a4582 BV |
191 | session->running = FALSE; |
192 | ||
193 | } | |
194 | ||
8a2efef2 | 195 | void sr_session_stop(void) |
a1bb33af | 196 | { |
5c2d46d1 | 197 | struct sr_device *device; |
a1bb33af UH |
198 | GSList *l; |
199 | ||
7d658874 | 200 | g_message("session: stopping"); |
544a4582 | 201 | session->running = FALSE; |
62c82025 | 202 | for (l = session->devices; l; l = l->next) { |
a1bb33af | 203 | device = l->data; |
b8c2f85f | 204 | if (device->plugin && device->plugin->stop_acquisition) |
aa4b1107 | 205 | device->plugin->stop_acquisition(device->plugin_index, device); |
a1bb33af | 206 | } |
544a4582 | 207 | |
a1bb33af UH |
208 | } |
209 | ||
8a2efef2 | 210 | void sr_session_bus(struct sr_device *device, struct sr_datafeed_packet *packet) |
a1bb33af UH |
211 | { |
212 | GSList *l; | |
213 | datafeed_callback cb; | |
214 | ||
62c82025 | 215 | /* |
aa4b1107 | 216 | * TODO: Send packet through PD pipe, and send the output of that to |
62c82025 | 217 | * the callbacks as well. |
a1bb33af | 218 | */ |
62c82025 | 219 | for (l = session->datafeed_callbacks; l; l = l->next) { |
a1bb33af UH |
220 | cb = l->data; |
221 | cb(device, packet); | |
222 | } | |
a1bb33af UH |
223 | } |
224 | ||
8a2efef2 | 225 | void sr_session_source_add(int fd, int events, int timeout, |
544a4582 BV |
226 | receive_data_callback callback, void *user_data) |
227 | { | |
228 | struct source *new_sources, *s; | |
229 | ||
230 | new_sources = calloc(1, sizeof(struct source) * (num_sources + 1)); | |
231 | ||
232 | if (sources) { | |
233 | memcpy(new_sources, sources, | |
234 | sizeof(struct source) * num_sources); | |
235 | free(sources); | |
236 | } | |
237 | ||
238 | s = &new_sources[num_sources++]; | |
239 | s->fd = fd; | |
240 | s->events = events; | |
241 | s->timeout = timeout; | |
242 | s->cb = callback; | |
243 | s->user_data = user_data; | |
244 | sources = new_sources; | |
245 | ||
246 | if (timeout != source_timeout && timeout > 0 | |
247 | && (source_timeout == -1 || timeout < source_timeout)) | |
248 | source_timeout = timeout; | |
249 | } | |
250 | ||
8a2efef2 | 251 | void sr_session_source_remove(int fd) |
544a4582 BV |
252 | { |
253 | struct source *new_sources; | |
254 | int old, new; | |
255 | ||
256 | if (!sources) | |
257 | return; | |
258 | ||
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)); | |
264 | ||
265 | if (old != new) { | |
266 | free(sources); | |
267 | sources = new_sources; | |
268 | num_sources--; | |
269 | } else { | |
270 | /* Target fd was not found. */ | |
271 | free(new_sources); | |
272 | } | |
273 | } | |
274 |