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 static void btstack_run_loop_qt_dump_timer(void); 61 62 // start time. tv_usec/tv_nsec = 0 63 #ifdef _POSIX_MONOTONIC_CLOCK 64 // use monotonic clock if available 65 static struct timespec init_ts; 66 #else 67 // fallback to gettimeofday 68 static struct timeval init_tv; 69 #endif 70 71 static BTstackRunLoopQt * btstack_run_loop_object; 72 73 #include <QHash> 74 #ifdef Q_OS_WIN 75 // associate each data source with QWinEventNotifier 76 static QHash<btstack_data_source_t *, QWinEventNotifier *> win_event_notifiers; 77 #else 78 static QHash<btstack_data_source_t *, QSocketNotifier *> read_notifiers; 79 static QHash<btstack_data_source_t *, QSocketNotifier *> write_notifiers; 80 #endif 81 82 static void btstack_run_loop_qt_update_data_source(btstack_data_source_t * ds){ 83 #ifdef Q_OS_WIN 84 QWinEventNotifier * win_notifier = win_event_notifiers.value(ds, NULL); 85 if (win_notifier){ 86 bool enabled = (ds->flags & (DATA_SOURCE_CALLBACK_READ | DATA_SOURCE_CALLBACK_WRITE)) != 0; 87 win_notifier->setEnabled(enabled); 88 } 89 #else 90 QSocketNotifier * read_notifier = read_notifiers.value(ds, NULL); 91 if (read_notifier){ 92 bool read_enabled = (ds->flags & DATA_SOURCE_CALLBACK_READ) != 0; 93 read_notifier->setEnabled(read_enabled); 94 } 95 QSocketNotifier * write_notifier = write_notifiers.value(ds, NULL); 96 if (write_notifier){ 97 bool write_enabled = (ds->flags & DATA_SOURCE_CALLBACK_WRITE) != 0; 98 write_notifier->setEnabled(write_enabled); 99 } 100 #endif 101 } 102 103 void btstack_run_loop_qt_add_data_source(btstack_data_source_t *ds){ 104 #ifdef Q_OS_WIN 105 QWinEventNotifier * win_notifier = new QWinEventNotifier(ds->source.handle); 106 win_event_notifiers.insert(ds, win_notifier); 107 btstack_run_loop_qt_update_data_source(ds); 108 QObject::connect(win_notifier, SIGNAL(activated(HANDLE)), btstack_run_loop_object, SLOT(processDataSource(HANDLE))); 109 log_debug("add data source %p with handle %p", ds, ds->source.handle); 110 #else 111 // POSIX Systems: macOS, Linux, .. 112 QSocketNotifier * read_notifier = new QSocketNotifier(ds->source.fd, QSocketNotifier::Read); 113 QSocketNotifier * write_notifier = new QSocketNotifier(ds->source.fd, QSocketNotifier::Write); 114 read_notifiers.insert(ds, read_notifier); 115 write_notifiers.insert(ds, write_notifier); 116 btstack_run_loop_qt_update_data_source(ds); 117 QObject::connect(read_notifier, SIGNAL(activated(int)), btstack_run_loop_object, SLOT(processDataSourceRead(int))); 118 QObject::connect(write_notifier, SIGNAL(activated(int)), btstack_run_loop_object, SLOT(processDataSourceWrite(int))); 119 #endif 120 btstack_run_loop_base_add_data_source(ds); 121 } 122 123 bool btstack_run_loop_qt_remove_data_source(btstack_data_source_t *ds){ 124 #ifdef Q_OS_WIN 125 QWinEventNotifier * win_notifier = win_event_notifiers.value(ds, NULL); 126 if (win_notifier){ 127 win_event_notifiers.remove(ds); 128 free(win_notifier); 129 } 130 #else 131 QSocketNotifier * read_notifier = read_notifiers.value(ds, NULL); 132 if (read_notifier){ 133 read_notifiers.remove(ds); 134 free(read_notifier); 135 } 136 QSocketNotifier * write_notifier = write_notifiers.value(ds, NULL); 137 if (write_notifier){ 138 write_notifiers.remove(ds); 139 free(write_notifier); 140 } 141 #endif 142 return btstack_run_loop_base_remove_data_source(ds); 143 } 144 145 void btstack_run_loop_qt_enable_data_source_callbacks(btstack_data_source_t * ds, uint16_t callback_types){ 146 btstack_run_loop_base_enable_data_source_callbacks(ds, callback_types); 147 btstack_run_loop_qt_update_data_source(ds); 148 } 149 150 void btstack_run_loop_qt_disable_data_source_callbacks(btstack_data_source_t * ds, uint16_t callback_types){ 151 btstack_run_loop_base_disable_data_source_callbacks(ds, callback_types); 152 btstack_run_loop_qt_update_data_source(ds); 153 } 154 155 #ifdef _POSIX_MONOTONIC_CLOCK 156 /** 157 * @brief Returns the timespec which represents the time(stop - start). It might be negative 158 */ 159 static void timespec_diff(struct timespec *start, struct timespec *stop, struct timespec *result){ 160 result->tv_sec = stop->tv_sec - start->tv_sec; 161 if ((stop->tv_nsec - start->tv_nsec) < 0) { 162 result->tv_sec = stop->tv_sec - start->tv_sec - 1; 163 result->tv_nsec = stop->tv_nsec - start->tv_nsec + 1000000000; 164 } else { 165 result->tv_sec = stop->tv_sec - start->tv_sec; 166 result->tv_nsec = stop->tv_nsec - start->tv_nsec; 167 } 168 } 169 170 /** 171 * @brief Convert timespec to miliseconds, might overflow 172 */ 173 static uint64_t timespec_to_milliseconds(struct timespec *a){ 174 uint64_t ret = 0; 175 uint64_t sec_val = (uint64_t)(a->tv_sec); 176 uint64_t nsec_val = (uint64_t)(a->tv_nsec); 177 ret = (sec_val*1000) + (nsec_val/1000000); 178 return ret; 179 } 180 181 /** 182 * @brief Returns the milisecond value of (stop - start). Might overflow 183 */ 184 static uint64_t timespec_diff_milis(struct timespec* start, struct timespec* stop){ 185 struct timespec diff_ts; 186 timespec_diff(start, stop, &diff_ts); 187 return timespec_to_milliseconds(&diff_ts); 188 } 189 #endif 190 191 /** 192 * @brief Queries the current time in ms since start 193 */ 194 static uint32_t btstack_run_loop_qt_get_time_ms(void){ 195 uint32_t time_ms; 196 #ifdef _POSIX_MONOTONIC_CLOCK 197 struct timespec now_ts; 198 clock_gettime(CLOCK_MONOTONIC, &now_ts); 199 time_ms = (uint32_t) timespec_diff_milis(&init_ts, &now_ts); 200 #else 201 struct timeval tv; 202 gettimeofday(&tv, NULL); 203 time_ms = (uint32_t) ((tv.tv_sec - init_tv.tv_sec) * 1000) + (tv.tv_usec / 1000); 204 #endif 205 return time_ms; 206 } 207 208 /** 209 * Execute run_loop 210 */ 211 static void btstack_run_loop_qt_execute(void) { 212 } 213 214 // set timer 215 static void btstack_run_loop_qt_set_timer(btstack_timer_source_t *a, uint32_t timeout_in_ms){ 216 uint32_t time_ms = btstack_run_loop_qt_get_time_ms(); 217 a->timeout = time_ms + timeout_in_ms; 218 log_debug("btstack_run_loop_qt_set_timer to %u ms (now %u, timeout %u)", a->timeout, time_ms, timeout_in_ms); 219 } 220 221 /** 222 * Add timer to run_loop (keep list sorted) 223 */ 224 static void btstack_run_loop_qt_add_timer(btstack_timer_source_t *ts){ 225 uint32_t now = btstack_run_loop_qt_get_time_ms(); 226 int32_t next_timeout_before = btstack_run_loop_base_get_time_until_timeout(now); 227 btstack_run_loop_base_add_timer(ts); 228 int32_t next_timeout_after = btstack_run_loop_base_get_time_until_timeout(now); 229 if (next_timeout_after >= 0 && (next_timeout_after != next_timeout_before)){ 230 QTimer::singleShot((uint32_t)next_timeout_after, btstack_run_loop_object, SLOT(processTimers())); 231 } 232 } 233 234 // BTstackRunLoopQt class implementation 235 void BTstackRunLoopQt::processTimers(){ 236 uint32_t now = btstack_run_loop_qt_get_time_ms(); 237 int32_t next_timeout_before = btstack_run_loop_base_get_time_until_timeout(now); 238 btstack_run_loop_base_process_timers(btstack_run_loop_qt_get_time_ms()); 239 int32_t next_timeout_after = btstack_run_loop_base_get_time_until_timeout(now); 240 if (next_timeout_after >= 0 && (next_timeout_after != next_timeout_before)){ 241 QTimer::singleShot((uint32_t)next_timeout_after, this, SLOT(processTimers())); 242 } 243 } 244 #ifdef Q_OS_WIN 245 void BTstackRunLoopQt::processDataSource(HANDLE handle){ 246 log_debug("lookup data source for handle %p, sender %p", handle, QObject::sender()); 247 // find ds 248 btstack_linked_list_iterator_t it; 249 btstack_linked_list_iterator_init(&it, &btstack_run_loop_base_data_sources); 250 while (btstack_linked_list_iterator_has_next(&it)){ 251 btstack_data_source_t *ds = (btstack_data_source_t*) btstack_linked_list_iterator_next(&it); 252 if (handle == ds->source.handle){ 253 if (ds->flags & DATA_SOURCE_CALLBACK_READ){ 254 log_debug("process read ds %p with handle %p", ds, ds->source.handle); 255 ds->process(ds, DATA_SOURCE_CALLBACK_READ); 256 } else if (ds->flags & DATA_SOURCE_CALLBACK_WRITE){ 257 log_debug("process write ds %p with handle %p", ds, ds->source.handle); 258 ds->process(ds, DATA_SOURCE_CALLBACK_WRITE); 259 } 260 break; 261 } 262 } 263 } 264 #else 265 266 static void btstack_run_loop_qt_process_data_source(int fd, uint16_t callback_types){ 267 // find ds 268 btstack_linked_list_iterator_t it; 269 btstack_linked_list_iterator_init(&it, &btstack_run_loop_base_data_sources); 270 while (btstack_linked_list_iterator_has_next(&it)){ 271 btstack_data_source_t *ds = (btstack_data_source_t*) btstack_linked_list_iterator_next(&it); 272 if (fd == ds->source.fd){ 273 if ((callback_types & DATA_SOURCE_CALLBACK_READ) != 0){ 274 if ((ds->flags & DATA_SOURCE_CALLBACK_READ) != 0){ 275 ds->process(ds, DATA_SOURCE_CALLBACK_READ); 276 } 277 } 278 if ((callback_types & DATA_SOURCE_CALLBACK_WRITE) != 0){ 279 if ((ds->flags & DATA_SOURCE_CALLBACK_WRITE) != 0){ 280 ds->process(ds, DATA_SOURCE_CALLBACK_WRITE); 281 } 282 } 283 break; 284 } 285 } 286 } 287 288 void BTstackRunLoopQt::processDataSourceRead(int fd){ 289 log_debug("read - lookup data source for handle %p, sender %p", fd, QObject::sender()); 290 btstack_run_loop_qt_process_data_source(fd, DATA_SOURCE_CALLBACK_READ); 291 } 292 void BTstackRunLoopQt::processDataSourceWrite(int fd){ 293 log_debug("write - lookup data source for handle %p, sender %p", fd, QObject::sender()); 294 btstack_run_loop_qt_process_data_source(fd, DATA_SOURCE_CALLBACK_WRITE); 295 } 296 #endif 297 298 static void btstack_run_loop_qt_init(void){ 299 300 btstack_run_loop_base_init(); 301 302 btstack_run_loop_object = new BTstackRunLoopQt(); 303 304 #ifdef _POSIX_MONOTONIC_CLOCK 305 clock_gettime(CLOCK_MONOTONIC, &init_ts); 306 init_ts.tv_nsec = 0; 307 #else 308 // just assume that we started at tv_usec == 0 309 gettimeofday(&init_tv, NULL); 310 init_tv.tv_usec = 0; 311 #endif 312 } 313 314 static void btstack_run_loop_qt_dump_timer(void){ 315 btstack_linked_item_t *it; 316 int i = 0; 317 for (it = (btstack_linked_item_t *) btstack_run_loop_base_timers; it ; it = it->next){ 318 btstack_timer_source_t *ts = (btstack_timer_source_t*) it; 319 log_info("timer %u (%p): timeout %u\n", i, ts, ts->timeout); 320 } 321 } 322 323 static const btstack_run_loop_t btstack_run_loop_qt = { 324 &btstack_run_loop_qt_init, 325 &btstack_run_loop_qt_add_data_source, 326 &btstack_run_loop_qt_remove_data_source, 327 &btstack_run_loop_qt_enable_data_source_callbacks, 328 &btstack_run_loop_qt_disable_data_source_callbacks, 329 &btstack_run_loop_qt_set_timer, 330 &btstack_run_loop_qt_add_timer, 331 &btstack_run_loop_base_remove_timer, 332 &btstack_run_loop_qt_execute, 333 &btstack_run_loop_qt_dump_timer, 334 &btstack_run_loop_qt_get_time_ms, 335 }; 336 337 /** 338 * Provide btstack_run_loop_posix instance 339 */ 340 const btstack_run_loop_t * btstack_run_loop_qt_get_instance(void){ 341 return &btstack_run_loop_qt; 342 } 343 344