1 /* 2 * Copyright (C) 2019 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "btstack_run_loop_qt.c" 39 40 /* 41 * btstack_run_loop_qt.c 42 */ 43 44 // enable POSIX functions (needed for -std=c99) 45 #define _POSIX_C_SOURCE 200809 46 47 #include "btstack_run_loop_qt.h" 48 49 #include "btstack_run_loop.h" 50 #include "btstack_util.h" 51 #include "btstack_linked_list.h" 52 #include "btstack_debug.h" 53 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <sys/time.h> 57 #include <time.h> 58 #include <unistd.h> 59 60 #include <QHash> 61 #include <QMutex> 62 63 // start time. tv_usec/tv_nsec = 0 64 #ifdef _POSIX_MONOTONIC_CLOCK 65 // use monotonic clock if available 66 static struct timespec init_ts; 67 #else 68 // fallback to gettimeofday 69 static struct timeval init_tv; 70 #endif 71 72 static BTstackRunLoopQt * btstack_run_loop_object; 73 74 75 #ifdef Q_OS_WIN 76 // associate each data source with QWinEventNotifier 77 static QHash<btstack_data_source_t *, QWinEventNotifier *> win_event_notifiers; 78 #else 79 static QHash<btstack_data_source_t *, QSocketNotifier *> read_notifiers; 80 static QHash<btstack_data_source_t *, QSocketNotifier *> write_notifiers; 81 #endif 82 83 static QMutex run_loop_callback_mutex; 84 85 static void btstack_run_loop_qt_dump_timer(void); 86 87 static void btstack_run_loop_qt_update_data_source(btstack_data_source_t * ds){ 88 #ifdef Q_OS_WIN 89 QWinEventNotifier * win_notifier = win_event_notifiers.value(ds, NULL); 90 if (win_notifier){ 91 bool enabled = (ds->flags & (DATA_SOURCE_CALLBACK_READ | DATA_SOURCE_CALLBACK_WRITE)) != 0; 92 win_notifier->setEnabled(enabled); 93 } 94 #else 95 QSocketNotifier * read_notifier = read_notifiers.value(ds, NULL); 96 if (read_notifier){ 97 bool read_enabled = (ds->flags & DATA_SOURCE_CALLBACK_READ) != 0; 98 read_notifier->setEnabled(read_enabled); 99 } 100 QSocketNotifier * write_notifier = write_notifiers.value(ds, NULL); 101 if (write_notifier){ 102 bool write_enabled = (ds->flags & DATA_SOURCE_CALLBACK_WRITE) != 0; 103 write_notifier->setEnabled(write_enabled); 104 } 105 #endif 106 } 107 108 void btstack_run_loop_qt_add_data_source(btstack_data_source_t *ds){ 109 #ifdef Q_OS_WIN 110 QWinEventNotifier * win_notifier = new QWinEventNotifier(ds->source.handle); 111 win_event_notifiers.insert(ds, win_notifier); 112 btstack_run_loop_qt_update_data_source(ds); 113 QObject::connect(win_notifier, SIGNAL(activated(HANDLE)), btstack_run_loop_object, SLOT(processDataSource(HANDLE))); 114 log_debug("add data source %p with handle %p", ds, ds->source.handle); 115 #else 116 // POSIX Systems: macOS, Linux, .. 117 QSocketNotifier * read_notifier = new QSocketNotifier(ds->source.fd, QSocketNotifier::Read); 118 QSocketNotifier * write_notifier = new QSocketNotifier(ds->source.fd, QSocketNotifier::Write); 119 read_notifiers.insert(ds, read_notifier); 120 write_notifiers.insert(ds, write_notifier); 121 btstack_run_loop_qt_update_data_source(ds); 122 QObject::connect(read_notifier, SIGNAL(activated(int)), btstack_run_loop_object, SLOT(processDataSourceRead(int))); 123 QObject::connect(write_notifier, SIGNAL(activated(int)), btstack_run_loop_object, SLOT(processDataSourceWrite(int))); 124 #endif 125 btstack_run_loop_base_add_data_source(ds); 126 } 127 128 bool btstack_run_loop_qt_remove_data_source(btstack_data_source_t *ds){ 129 #ifdef Q_OS_WIN 130 QWinEventNotifier * win_notifier = win_event_notifiers.value(ds, NULL); 131 if (win_notifier){ 132 win_event_notifiers.remove(ds); 133 free(win_notifier); 134 } 135 #else 136 QSocketNotifier * read_notifier = read_notifiers.value(ds, NULL); 137 if (read_notifier){ 138 read_notifiers.remove(ds); 139 free(read_notifier); 140 } 141 QSocketNotifier * write_notifier = write_notifiers.value(ds, NULL); 142 if (write_notifier){ 143 write_notifiers.remove(ds); 144 free(write_notifier); 145 } 146 #endif 147 return btstack_run_loop_base_remove_data_source(ds); 148 } 149 150 void btstack_run_loop_qt_enable_data_source_callbacks(btstack_data_source_t * ds, uint16_t callback_types){ 151 btstack_run_loop_base_enable_data_source_callbacks(ds, callback_types); 152 btstack_run_loop_qt_update_data_source(ds); 153 } 154 155 void btstack_run_loop_qt_disable_data_source_callbacks(btstack_data_source_t * ds, uint16_t callback_types){ 156 btstack_run_loop_base_disable_data_source_callbacks(ds, callback_types); 157 btstack_run_loop_qt_update_data_source(ds); 158 } 159 160 #ifdef _POSIX_MONOTONIC_CLOCK 161 /** 162 * @brief Returns the timespec which represents the time(stop - start). It might be negative 163 */ 164 static void timespec_diff(struct timespec *start, struct timespec *stop, struct timespec *result){ 165 result->tv_sec = stop->tv_sec - start->tv_sec; 166 if ((stop->tv_nsec - start->tv_nsec) < 0) { 167 result->tv_sec = stop->tv_sec - start->tv_sec - 1; 168 result->tv_nsec = stop->tv_nsec - start->tv_nsec + 1000000000; 169 } else { 170 result->tv_sec = stop->tv_sec - start->tv_sec; 171 result->tv_nsec = stop->tv_nsec - start->tv_nsec; 172 } 173 } 174 175 /** 176 * @brief Convert timespec to miliseconds, might overflow 177 */ 178 static uint64_t timespec_to_milliseconds(struct timespec *a){ 179 uint64_t ret = 0; 180 uint64_t sec_val = (uint64_t)(a->tv_sec); 181 uint64_t nsec_val = (uint64_t)(a->tv_nsec); 182 ret = (sec_val*1000) + (nsec_val/1000000); 183 return ret; 184 } 185 186 /** 187 * @brief Returns the milisecond value of (stop - start). Might overflow 188 */ 189 static uint64_t timespec_diff_milis(struct timespec* start, struct timespec* stop){ 190 struct timespec diff_ts; 191 timespec_diff(start, stop, &diff_ts); 192 return timespec_to_milliseconds(&diff_ts); 193 } 194 #endif 195 196 /** 197 * @brief Queries the current time in ms since start 198 */ 199 static uint32_t btstack_run_loop_qt_get_time_ms(void){ 200 uint32_t time_ms; 201 #ifdef _POSIX_MONOTONIC_CLOCK 202 struct timespec now_ts; 203 clock_gettime(CLOCK_MONOTONIC, &now_ts); 204 time_ms = (uint32_t) timespec_diff_milis(&init_ts, &now_ts); 205 #else 206 struct timeval tv; 207 gettimeofday(&tv, NULL); 208 time_ms = (uint32_t) ((tv.tv_sec - init_tv.tv_sec) * 1000) + (tv.tv_usec / 1000); 209 #endif 210 return time_ms; 211 } 212 213 /** 214 * Execute run_loop 215 */ 216 static void btstack_run_loop_qt_execute(void) { 217 } 218 219 // set timer 220 static void btstack_run_loop_qt_set_timer(btstack_timer_source_t *a, uint32_t timeout_in_ms){ 221 uint32_t time_ms = btstack_run_loop_qt_get_time_ms(); 222 a->timeout = time_ms + timeout_in_ms; 223 log_debug("btstack_run_loop_qt_set_timer to %u ms (now %u, timeout %u)", a->timeout, time_ms, timeout_in_ms); 224 } 225 226 /** 227 * Add timer to run_loop (keep list sorted) 228 */ 229 static void btstack_run_loop_qt_add_timer(btstack_timer_source_t *ts){ 230 uint32_t now = btstack_run_loop_qt_get_time_ms(); 231 int32_t next_timeout_before = btstack_run_loop_base_get_time_until_timeout(now); 232 btstack_run_loop_base_add_timer(ts); 233 int32_t next_timeout_after = btstack_run_loop_base_get_time_until_timeout(now); 234 if (next_timeout_after >= 0 && (next_timeout_after != next_timeout_before)){ 235 QTimer::singleShot((uint32_t)next_timeout_after, btstack_run_loop_object, SLOT(processTimers())); 236 } 237 } 238 239 // BTstackRunLoopQt class implementation 240 BTstackRunLoopQt::BTstackRunLoopQt(void) : QObject() { 241 // allow to trigger processCallbacks both from main thread as well as other threads later 242 connect(this, &BTstackRunLoopQt::callbackAdded, this, &BTstackRunLoopQt::processCallbacks, Qt::QueuedConnection); 243 } 244 245 void BTstackRunLoopQt::processTimers(){ 246 uint32_t now = btstack_run_loop_qt_get_time_ms(); 247 int32_t next_timeout_before = btstack_run_loop_base_get_time_until_timeout(now); 248 btstack_run_loop_base_process_timers(btstack_run_loop_qt_get_time_ms()); 249 int32_t next_timeout_after = btstack_run_loop_base_get_time_until_timeout(now); 250 if (next_timeout_after >= 0 && (next_timeout_after != next_timeout_before)){ 251 QTimer::singleShot((uint32_t)next_timeout_after, this, SLOT(processTimers())); 252 } 253 } 254 #ifdef Q_OS_WIN 255 void BTstackRunLoopQt::processDataSource(HANDLE handle){ 256 log_debug("lookup data source for handle %p, sender %p", handle, QObject::sender()); 257 // find ds 258 btstack_linked_list_iterator_t it; 259 btstack_linked_list_iterator_init(&it, &btstack_run_loop_base_data_sources); 260 while (btstack_linked_list_iterator_has_next(&it)){ 261 btstack_data_source_t *ds = (btstack_data_source_t*) btstack_linked_list_iterator_next(&it); 262 if (handle == ds->source.handle){ 263 if (ds->flags & DATA_SOURCE_CALLBACK_READ){ 264 log_debug("process read ds %p with handle %p", ds, ds->source.handle); 265 ds->process(ds, DATA_SOURCE_CALLBACK_READ); 266 } else if (ds->flags & DATA_SOURCE_CALLBACK_WRITE){ 267 log_debug("process write ds %p with handle %p", ds, ds->source.handle); 268 ds->process(ds, DATA_SOURCE_CALLBACK_WRITE); 269 } 270 break; 271 } 272 } 273 } 274 #else 275 276 void BTstackRunLoopQt::processCallbacks(void) { 277 // execute callbacks - protect list with mutex 278 while (1){ 279 run_loop_callback_mutex.lock(); 280 btstack_context_callback_registration_t * callback_registration = (btstack_context_callback_registration_t *) btstack_linked_list_pop(&btstack_run_loop_base_callbacks); 281 run_loop_callback_mutex.unlock(); 282 if (callback_registration == NULL){ 283 break; 284 } 285 (*callback_registration->callback)(callback_registration->context); 286 } 287 } 288 289 static void btstack_run_loop_qt_execute_on_main_thread(btstack_context_callback_registration_t * callback_registration){ 290 // protect list with mutex 291 run_loop_callback_mutex.lock(); 292 btstack_run_loop_base_add_callback(callback_registration); 293 run_loop_callback_mutex.unlock(); 294 btstack_run_loop_object->emit callbackAdded(); 295 } 296 297 static void btstack_run_loop_qt_process_data_source(int fd, uint16_t callback_types){ 298 // find ds 299 btstack_linked_list_iterator_t it; 300 btstack_linked_list_iterator_init(&it, &btstack_run_loop_base_data_sources); 301 while (btstack_linked_list_iterator_has_next(&it)){ 302 btstack_data_source_t *ds = (btstack_data_source_t*) btstack_linked_list_iterator_next(&it); 303 if (fd == ds->source.fd){ 304 if ((callback_types & DATA_SOURCE_CALLBACK_READ) != 0){ 305 if ((ds->flags & DATA_SOURCE_CALLBACK_READ) != 0){ 306 ds->process(ds, DATA_SOURCE_CALLBACK_READ); 307 } 308 } 309 if ((callback_types & DATA_SOURCE_CALLBACK_WRITE) != 0){ 310 if ((ds->flags & DATA_SOURCE_CALLBACK_WRITE) != 0){ 311 ds->process(ds, DATA_SOURCE_CALLBACK_WRITE); 312 } 313 } 314 break; 315 } 316 } 317 } 318 319 void BTstackRunLoopQt::processDataSourceRead(int fd){ 320 log_debug("read - lookup data source for handle %p, sender %p", fd, QObject::sender()); 321 btstack_run_loop_qt_process_data_source(fd, DATA_SOURCE_CALLBACK_READ); 322 } 323 void BTstackRunLoopQt::processDataSourceWrite(int fd){ 324 log_debug("write - lookup data source for handle %p, sender %p", fd, QObject::sender()); 325 btstack_run_loop_qt_process_data_source(fd, DATA_SOURCE_CALLBACK_WRITE); 326 } 327 #endif 328 329 static void btstack_run_loop_qt_init(void){ 330 331 btstack_run_loop_base_init(); 332 333 btstack_run_loop_object = new BTstackRunLoopQt(); 334 335 #ifdef _POSIX_MONOTONIC_CLOCK 336 clock_gettime(CLOCK_MONOTONIC, &init_ts); 337 init_ts.tv_nsec = 0; 338 #else 339 // just assume that we started at tv_usec == 0 340 gettimeofday(&init_tv, NULL); 341 init_tv.tv_usec = 0; 342 #endif 343 } 344 345 static void btstack_run_loop_qt_dump_timer(void){ 346 btstack_linked_item_t *it; 347 int i = 0; 348 for (it = (btstack_linked_item_t *) btstack_run_loop_base_timers; it ; it = it->next){ 349 btstack_timer_source_t *ts = (btstack_timer_source_t*) it; 350 log_info("timer %u (%p): timeout %u\n", i, ts, ts->timeout); 351 } 352 } 353 354 static const btstack_run_loop_t btstack_run_loop_qt = { 355 &btstack_run_loop_qt_init, 356 &btstack_run_loop_qt_add_data_source, 357 &btstack_run_loop_qt_remove_data_source, 358 &btstack_run_loop_qt_enable_data_source_callbacks, 359 &btstack_run_loop_qt_disable_data_source_callbacks, 360 &btstack_run_loop_qt_set_timer, 361 &btstack_run_loop_qt_add_timer, 362 &btstack_run_loop_base_remove_timer, 363 &btstack_run_loop_qt_execute, 364 &btstack_run_loop_qt_dump_timer, 365 &btstack_run_loop_qt_get_time_ms, 366 NULL, /* poll data sources from irq */ 367 &btstack_run_loop_qt_execute_on_main_thread, 368 NULL 369 }; 370 371 /** 372 * Provide btstack_run_loop_posix instance 373 */ 374 const btstack_run_loop_t * btstack_run_loop_qt_get_instance(void){ 375 return &btstack_run_loop_qt; 376 } 377 378