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_run_loop_base.h" 51 #include "btstack_util.h" 52 #include "btstack_linked_list.h" 53 #include "btstack_debug.h" 54 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <sys/select.h> 58 #include <sys/time.h> 59 #include <time.h> 60 #include <unistd.h> 61 62 static void btstack_run_loop_qt_dump_timer(void); 63 64 // start time. tv_usec/tv_nsec = 0 65 #ifdef _POSIX_MONOTONIC_CLOCK 66 // use monotonic clock if available 67 static struct timespec init_ts; 68 #else 69 // fallback to gettimeofday 70 static struct timeval init_tv; 71 #endif 72 73 static BTstackRunLoopQt * btstack_run_loop_object; 74 75 #ifdef _POSIX_MONOTONIC_CLOCK 76 /** 77 * @brief Returns the timespec which represents the time(stop - start). It might be negative 78 */ 79 static void timespec_diff(struct timespec *start, struct timespec *stop, struct timespec *result){ 80 result->tv_sec = stop->tv_sec - start->tv_sec; 81 if ((stop->tv_nsec - start->tv_nsec) < 0) { 82 result->tv_sec = stop->tv_sec - start->tv_sec - 1; 83 result->tv_nsec = stop->tv_nsec - start->tv_nsec + 1000000000; 84 } else { 85 result->tv_sec = stop->tv_sec - start->tv_sec; 86 result->tv_nsec = stop->tv_nsec - start->tv_nsec; 87 } 88 } 89 90 /** 91 * @brief Convert timespec to miliseconds, might overflow 92 */ 93 static uint64_t timespec_to_milliseconds(struct timespec *a){ 94 uint64_t ret = 0; 95 uint64_t sec_val = (uint64_t)(a->tv_sec); 96 uint64_t nsec_val = (uint64_t)(a->tv_nsec); 97 ret = (sec_val*1000) + (nsec_val/1000000); 98 return ret; 99 } 100 101 /** 102 * @brief Returns the milisecond value of (stop - start). Might overflow 103 */ 104 static uint64_t timespec_diff_milis(struct timespec* start, struct timespec* stop){ 105 struct timespec diff_ts; 106 timespec_diff(start, stop, &diff_ts); 107 return timespec_to_milliseconds(&diff_ts); 108 } 109 #endif 110 111 /** 112 * @brief Queries the current time in ms since start 113 */ 114 static uint32_t btstack_run_loop_qt_get_time_ms(void){ 115 uint32_t time_ms; 116 #ifdef _POSIX_MONOTONIC_CLOCK 117 struct timespec now_ts; 118 clock_gettime(CLOCK_MONOTONIC, &now_ts); 119 time_ms = (uint32_t) timespec_diff_milis(&init_ts, &now_ts); 120 #else 121 struct timeval tv; 122 gettimeofday(&tv, NULL); 123 time_ms = (uint32_t) ((tv.tv_sec - init_tv.tv_sec) * 1000) + (tv.tv_usec / 1000); 124 #endif 125 return time_ms; 126 } 127 128 /** 129 * Execute run_loop 130 */ 131 static void btstack_run_loop_qt_execute(void) { 132 } 133 134 // set timer 135 static void btstack_run_loop_qt_set_timer(btstack_timer_source_t *a, uint32_t timeout_in_ms){ 136 uint32_t time_ms = btstack_run_loop_qt_get_time_ms(); 137 a->timeout = time_ms + timeout_in_ms; 138 log_debug("btstack_run_loop_qt_set_timer to %u ms (now %u, timeout %u)", a->timeout, time_ms, timeout_in_ms); 139 } 140 141 /** 142 * Add timer to run_loop (keep list sorted) 143 */ 144 static void btstack_run_loop_qt_add_timer(btstack_timer_source_t *ts){ 145 uint32_t now = btstack_run_loop_qt_get_time_ms(); 146 int32_t next_timeout_before = btstack_run_loop_base_get_time_until_timeout(now); 147 btstack_run_loop_base_add_timer(ts); 148 int32_t next_timeout_after = btstack_run_loop_base_get_time_until_timeout(now); 149 if (next_timeout_after >= 0 && (next_timeout_after != next_timeout_before)){ 150 QTimer::singleShot((uint32_t)next_timeout_after, btstack_run_loop_object, SLOT(processTimers())); 151 } 152 } 153 154 // BTstackRunLoopQt class implementation 155 void BTstackRunLoopQt::processTimers(){ 156 uint32_t now = btstack_run_loop_qt_get_time_ms(); 157 int32_t next_timeout_before = btstack_run_loop_base_get_time_until_timeout(now); 158 btstack_run_loop_base_process_timers(btstack_run_loop_qt_get_time_ms()); 159 int32_t next_timeout_after = btstack_run_loop_base_get_time_until_timeout(now); 160 if (next_timeout_after >= 0 && (next_timeout_after != next_timeout_before)){ 161 QTimer::singleShot((uint32_t)next_timeout_after, this, SLOT(processTimers())); 162 } 163 } 164 165 static void btstack_run_loop_qt_init(void){ 166 167 btstack_run_loop_base_init(); 168 169 btstack_run_loop_object = new BTstackRunLoopQt(); 170 171 #ifdef _POSIX_MONOTONIC_CLOCK 172 clock_gettime(CLOCK_MONOTONIC, &init_ts); 173 init_ts.tv_nsec = 0; 174 #else 175 // just assume that we started at tv_usec == 0 176 gettimeofday(&init_tv, NULL); 177 init_tv.tv_usec = 0; 178 #endif 179 } 180 181 static void btstack_run_loop_qt_dump_timer(void){ 182 btstack_linked_item_t *it; 183 int i = 0; 184 for (it = (btstack_linked_item_t *) btstack_run_loop_base_timers; it ; it = it->next){ 185 btstack_timer_source_t *ts = (btstack_timer_source_t*) it; 186 log_info("timer %u (%p): timeout %u\n", i, ts, ts->timeout); 187 } 188 } 189 190 static const btstack_run_loop_t btstack_run_loop_qt = { 191 &btstack_run_loop_qt_init, 192 &btstack_run_loop_base_add_data_source, 193 &btstack_run_loop_base_remove_data_source, 194 &btstack_run_loop_base_enable_data_source_callbacks, 195 &btstack_run_loop_base_disable_data_source_callbacks, 196 &btstack_run_loop_qt_set_timer, 197 &btstack_run_loop_qt_add_timer, 198 &btstack_run_loop_base_remove_timer, 199 &btstack_run_loop_qt_execute, 200 &btstack_run_loop_qt_dump_timer, 201 &btstack_run_loop_qt_get_time_ms, 202 }; 203 204 /** 205 * Provide btstack_run_loop_posix instance 206 */ 207 const btstack_run_loop_t * btstack_run_loop_qt_get_instance(void){ 208 return &btstack_run_loop_qt; 209 } 210 211