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Commit | Line | Data |
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db1a4972 PB |
1 | /* |
2 | * QEMU System Emulator | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
9c17d615 | 25 | #include "sysemu/sysemu.h" |
83c9089e | 26 | #include "monitor/monitor.h" |
28ecbaee | 27 | #include "ui/console.h" |
db1a4972 PB |
28 | |
29 | #include "hw/hw.h" | |
30 | ||
1de7afc9 | 31 | #include "qemu/timer.h" |
30ea8339 AL |
32 | #ifdef CONFIG_POSIX |
33 | #include <pthread.h> | |
34 | #endif | |
bff9f8bf | 35 | |
4e0c6529 AB |
36 | #ifdef CONFIG_PPOLL |
37 | #include <poll.h> | |
38 | #endif | |
39 | ||
cd758dd0 AB |
40 | #ifdef CONFIG_PRCTL_PR_SET_TIMERSLACK |
41 | #include <sys/prctl.h> | |
42 | #endif | |
43 | ||
db1a4972 PB |
44 | /***********************************************************/ |
45 | /* timers */ | |
46 | ||
b4049b74 | 47 | typedef struct QEMUClock { |
3c053411 | 48 | /* We rely on BQL to protect the timerlists */ |
ff83c66e | 49 | QLIST_HEAD(, QEMUTimerList) timerlists; |
691a0c9c JK |
50 | |
51 | NotifierList reset_notifiers; | |
52 | int64_t last; | |
9a14b298 | 53 | |
ff83c66e | 54 | QEMUClockType type; |
9a14b298 | 55 | bool enabled; |
b4049b74 | 56 | } QEMUClock; |
db1a4972 | 57 | |
754d6a54 | 58 | QEMUTimerListGroup main_loop_tlg; |
7bf8fbde | 59 | QEMUClock qemu_clocks[QEMU_CLOCK_MAX]; |
ff83c66e AB |
60 | |
61 | /* A QEMUTimerList is a list of timers attached to a clock. More | |
62 | * than one QEMUTimerList can be attached to each clock, for instance | |
63 | * used by different AioContexts / threads. Each clock also has | |
64 | * a list of the QEMUTimerLists associated with it, in order that | |
65 | * reenabling the clock can call all the notifiers. | |
66 | */ | |
67 | ||
68 | struct QEMUTimerList { | |
9a14b298 | 69 | QEMUClock *clock; |
978f2205 | 70 | QemuMutex active_timers_lock; |
ff83c66e AB |
71 | QEMUTimer *active_timers; |
72 | QLIST_ENTRY(QEMUTimerList) list; | |
d5541d86 AB |
73 | QEMUTimerListNotifyCB *notify_cb; |
74 | void *notify_opaque; | |
3c053411 LPF |
75 | |
76 | /* lightweight method to mark the end of timerlist's running */ | |
77 | QemuEvent timers_done_ev; | |
db1a4972 PB |
78 | }; |
79 | ||
7bf8fbde AB |
80 | /** |
81 | * qemu_clock_ptr: | |
82 | * @type: type of clock | |
83 | * | |
84 | * Translate a clock type into a pointer to QEMUClock object. | |
85 | * | |
86 | * Returns: a pointer to the QEMUClock object | |
87 | */ | |
b4049b74 | 88 | static inline QEMUClock *qemu_clock_ptr(QEMUClockType type) |
7bf8fbde AB |
89 | { |
90 | return &qemu_clocks[type]; | |
91 | } | |
92 | ||
e93379b0 | 93 | static bool timer_expired_ns(QEMUTimer *timer_head, int64_t current_time) |
45c7b37f SW |
94 | { |
95 | return timer_head && (timer_head->expire_time <= current_time); | |
96 | } | |
97 | ||
7bf8fbde AB |
98 | QEMUTimerList *timerlist_new(QEMUClockType type, |
99 | QEMUTimerListNotifyCB *cb, | |
100 | void *opaque) | |
ff83c66e AB |
101 | { |
102 | QEMUTimerList *timer_list; | |
7bf8fbde | 103 | QEMUClock *clock = qemu_clock_ptr(type); |
ff83c66e AB |
104 | |
105 | timer_list = g_malloc0(sizeof(QEMUTimerList)); | |
3c053411 | 106 | qemu_event_init(&timer_list->timers_done_ev, false); |
ff83c66e | 107 | timer_list->clock = clock; |
d5541d86 AB |
108 | timer_list->notify_cb = cb; |
109 | timer_list->notify_opaque = opaque; | |
978f2205 | 110 | qemu_mutex_init(&timer_list->active_timers_lock); |
ff83c66e AB |
111 | QLIST_INSERT_HEAD(&clock->timerlists, timer_list, list); |
112 | return timer_list; | |
113 | } | |
114 | ||
ff83c66e AB |
115 | void timerlist_free(QEMUTimerList *timer_list) |
116 | { | |
117 | assert(!timerlist_has_timers(timer_list)); | |
118 | if (timer_list->clock) { | |
119 | QLIST_REMOVE(timer_list, list); | |
ff83c66e | 120 | } |
978f2205 | 121 | qemu_mutex_destroy(&timer_list->active_timers_lock); |
ff83c66e AB |
122 | g_free(timer_list); |
123 | } | |
124 | ||
7bf8fbde | 125 | static void qemu_clock_init(QEMUClockType type) |
db1a4972 | 126 | { |
7bf8fbde | 127 | QEMUClock *clock = qemu_clock_ptr(type); |
691a0c9c | 128 | |
db1a4972 | 129 | clock->type = type; |
5e1ec7b2 | 130 | clock->enabled = true; |
2ff68d07 | 131 | clock->last = INT64_MIN; |
ff83c66e | 132 | QLIST_INIT(&clock->timerlists); |
691a0c9c | 133 | notifier_list_init(&clock->reset_notifiers); |
7bf8fbde | 134 | main_loop_tlg.tl[type] = timerlist_new(type, NULL, NULL); |
db1a4972 PB |
135 | } |
136 | ||
40daca54 | 137 | bool qemu_clock_use_for_deadline(QEMUClockType type) |
ff83c66e | 138 | { |
40daca54 | 139 | return !(use_icount && (type == QEMU_CLOCK_VIRTUAL)); |
ff83c66e AB |
140 | } |
141 | ||
40daca54 | 142 | void qemu_clock_notify(QEMUClockType type) |
b1bbfe72 AB |
143 | { |
144 | QEMUTimerList *timer_list; | |
40daca54 | 145 | QEMUClock *clock = qemu_clock_ptr(type); |
b1bbfe72 AB |
146 | QLIST_FOREACH(timer_list, &clock->timerlists, list) { |
147 | timerlist_notify(timer_list); | |
148 | } | |
149 | } | |
150 | ||
3c053411 LPF |
151 | /* Disabling the clock will wait for related timerlists to stop |
152 | * executing qemu_run_timers. Thus, this functions should not | |
153 | * be used from the callback of a timer that is based on @clock. | |
154 | * Doing so would cause a deadlock. | |
155 | * | |
156 | * Caller should hold BQL. | |
157 | */ | |
40daca54 | 158 | void qemu_clock_enable(QEMUClockType type, bool enabled) |
db1a4972 | 159 | { |
40daca54 | 160 | QEMUClock *clock = qemu_clock_ptr(type); |
3c053411 | 161 | QEMUTimerList *tl; |
fbdc14eb | 162 | bool old = clock->enabled; |
db1a4972 | 163 | clock->enabled = enabled; |
fbdc14eb | 164 | if (enabled && !old) { |
40daca54 | 165 | qemu_clock_notify(type); |
3c053411 LPF |
166 | } else if (!enabled && old) { |
167 | QLIST_FOREACH(tl, &clock->timerlists, list) { | |
168 | qemu_event_wait(&tl->timers_done_ev); | |
169 | } | |
fbdc14eb | 170 | } |
db1a4972 PB |
171 | } |
172 | ||
ff83c66e | 173 | bool timerlist_has_timers(QEMUTimerList *timer_list) |
dc2dfcf0 | 174 | { |
ff83c66e | 175 | return !!timer_list->active_timers; |
dc2dfcf0 PB |
176 | } |
177 | ||
40daca54 | 178 | bool qemu_clock_has_timers(QEMUClockType type) |
dc2dfcf0 | 179 | { |
40daca54 | 180 | return timerlist_has_timers( |
7bf8fbde | 181 | main_loop_tlg.tl[type]); |
dc2dfcf0 PB |
182 | } |
183 | ||
ff83c66e AB |
184 | bool timerlist_expired(QEMUTimerList *timer_list) |
185 | { | |
978f2205 SH |
186 | int64_t expire_time; |
187 | ||
188 | qemu_mutex_lock(&timer_list->active_timers_lock); | |
189 | if (!timer_list->active_timers) { | |
190 | qemu_mutex_unlock(&timer_list->active_timers_lock); | |
191 | return false; | |
192 | } | |
193 | expire_time = timer_list->active_timers->expire_time; | |
194 | qemu_mutex_unlock(&timer_list->active_timers_lock); | |
195 | ||
196 | return expire_time < qemu_clock_get_ns(timer_list->clock->type); | |
ff83c66e AB |
197 | } |
198 | ||
40daca54 | 199 | bool qemu_clock_expired(QEMUClockType type) |
ff83c66e | 200 | { |
40daca54 | 201 | return timerlist_expired( |
7bf8fbde | 202 | main_loop_tlg.tl[type]); |
ff83c66e AB |
203 | } |
204 | ||
02a03a9f AB |
205 | /* |
206 | * As above, but return -1 for no deadline, and do not cap to 2^32 | |
207 | * as we know the result is always positive. | |
208 | */ | |
209 | ||
ff83c66e | 210 | int64_t timerlist_deadline_ns(QEMUTimerList *timer_list) |
02a03a9f AB |
211 | { |
212 | int64_t delta; | |
978f2205 | 213 | int64_t expire_time; |
02a03a9f | 214 | |
978f2205 | 215 | if (!timer_list->clock->enabled) { |
02a03a9f AB |
216 | return -1; |
217 | } | |
218 | ||
978f2205 SH |
219 | /* The active timers list may be modified before the caller uses our return |
220 | * value but ->notify_cb() is called when the deadline changes. Therefore | |
221 | * the caller should notice the change and there is no race condition. | |
222 | */ | |
223 | qemu_mutex_lock(&timer_list->active_timers_lock); | |
224 | if (!timer_list->active_timers) { | |
225 | qemu_mutex_unlock(&timer_list->active_timers_lock); | |
226 | return -1; | |
227 | } | |
228 | expire_time = timer_list->active_timers->expire_time; | |
229 | qemu_mutex_unlock(&timer_list->active_timers_lock); | |
230 | ||
231 | delta = expire_time - qemu_clock_get_ns(timer_list->clock->type); | |
02a03a9f AB |
232 | |
233 | if (delta <= 0) { | |
234 | return 0; | |
235 | } | |
236 | ||
237 | return delta; | |
238 | } | |
239 | ||
ac70aafc AB |
240 | /* Calculate the soonest deadline across all timerlists attached |
241 | * to the clock. This is used for the icount timeout so we | |
242 | * ignore whether or not the clock should be used in deadline | |
243 | * calculations. | |
244 | */ | |
40daca54 | 245 | int64_t qemu_clock_deadline_ns_all(QEMUClockType type) |
ac70aafc AB |
246 | { |
247 | int64_t deadline = -1; | |
248 | QEMUTimerList *timer_list; | |
40daca54 | 249 | QEMUClock *clock = qemu_clock_ptr(type); |
ac70aafc AB |
250 | QLIST_FOREACH(timer_list, &clock->timerlists, list) { |
251 | deadline = qemu_soonest_timeout(deadline, | |
252 | timerlist_deadline_ns(timer_list)); | |
253 | } | |
254 | return deadline; | |
255 | } | |
256 | ||
40daca54 | 257 | QEMUClockType timerlist_get_clock(QEMUTimerList *timer_list) |
ff83c66e | 258 | { |
40daca54 | 259 | return timer_list->clock->type; |
ff83c66e AB |
260 | } |
261 | ||
40daca54 | 262 | QEMUTimerList *qemu_clock_get_main_loop_timerlist(QEMUClockType type) |
ff83c66e | 263 | { |
7bf8fbde | 264 | return main_loop_tlg.tl[type]; |
ff83c66e AB |
265 | } |
266 | ||
d5541d86 AB |
267 | void timerlist_notify(QEMUTimerList *timer_list) |
268 | { | |
269 | if (timer_list->notify_cb) { | |
270 | timer_list->notify_cb(timer_list->notify_opaque); | |
271 | } else { | |
272 | qemu_notify_event(); | |
273 | } | |
274 | } | |
275 | ||
02a03a9f AB |
276 | /* Transition function to convert a nanosecond timeout to ms |
277 | * This is used where a system does not support ppoll | |
278 | */ | |
279 | int qemu_timeout_ns_to_ms(int64_t ns) | |
280 | { | |
281 | int64_t ms; | |
282 | if (ns < 0) { | |
283 | return -1; | |
284 | } | |
285 | ||
286 | if (!ns) { | |
287 | return 0; | |
288 | } | |
289 | ||
290 | /* Always round up, because it's better to wait too long than to wait too | |
291 | * little and effectively busy-wait | |
292 | */ | |
293 | ms = (ns + SCALE_MS - 1) / SCALE_MS; | |
294 | ||
295 | /* To avoid overflow problems, limit this to 2^31, i.e. approx 25 days */ | |
296 | if (ms > (int64_t) INT32_MAX) { | |
297 | ms = INT32_MAX; | |
298 | } | |
299 | ||
300 | return (int) ms; | |
301 | } | |
302 | ||
303 | ||
4e0c6529 AB |
304 | /* qemu implementation of g_poll which uses a nanosecond timeout but is |
305 | * otherwise identical to g_poll | |
306 | */ | |
307 | int qemu_poll_ns(GPollFD *fds, guint nfds, int64_t timeout) | |
308 | { | |
309 | #ifdef CONFIG_PPOLL | |
310 | if (timeout < 0) { | |
311 | return ppoll((struct pollfd *)fds, nfds, NULL, NULL); | |
312 | } else { | |
313 | struct timespec ts; | |
314 | ts.tv_sec = timeout / 1000000000LL; | |
315 | ts.tv_nsec = timeout % 1000000000LL; | |
316 | return ppoll((struct pollfd *)fds, nfds, &ts, NULL); | |
317 | } | |
318 | #else | |
319 | return g_poll(fds, nfds, qemu_timeout_ns_to_ms(timeout)); | |
320 | #endif | |
321 | } | |
322 | ||
323 | ||
ff83c66e AB |
324 | void timer_init(QEMUTimer *ts, |
325 | QEMUTimerList *timer_list, int scale, | |
326 | QEMUTimerCB *cb, void *opaque) | |
db1a4972 | 327 | { |
ff83c66e | 328 | ts->timer_list = timer_list; |
db1a4972 PB |
329 | ts->cb = cb; |
330 | ts->opaque = opaque; | |
4a998740 | 331 | ts->scale = scale; |
3db1ee7c | 332 | ts->expire_time = -1; |
ff83c66e AB |
333 | } |
334 | ||
40daca54 | 335 | void timer_free(QEMUTimer *ts) |
db1a4972 | 336 | { |
7267c094 | 337 | g_free(ts); |
db1a4972 PB |
338 | } |
339 | ||
978f2205 | 340 | static void timer_del_locked(QEMUTimerList *timer_list, QEMUTimer *ts) |
db1a4972 PB |
341 | { |
342 | QEMUTimer **pt, *t; | |
343 | ||
3db1ee7c | 344 | ts->expire_time = -1; |
978f2205 | 345 | pt = &timer_list->active_timers; |
db1a4972 PB |
346 | for(;;) { |
347 | t = *pt; | |
348 | if (!t) | |
349 | break; | |
350 | if (t == ts) { | |
351 | *pt = t->next; | |
352 | break; | |
353 | } | |
354 | pt = &t->next; | |
355 | } | |
356 | } | |
357 | ||
978f2205 SH |
358 | /* stop a timer, but do not dealloc it */ |
359 | void timer_del(QEMUTimer *ts) | |
360 | { | |
361 | QEMUTimerList *timer_list = ts->timer_list; | |
362 | ||
363 | qemu_mutex_lock(&timer_list->active_timers_lock); | |
364 | timer_del_locked(timer_list, ts); | |
365 | qemu_mutex_unlock(&timer_list->active_timers_lock); | |
366 | } | |
367 | ||
db1a4972 PB |
368 | /* modify the current timer so that it will be fired when current_time |
369 | >= expire_time. The corresponding callback will be called. */ | |
40daca54 | 370 | void timer_mod_ns(QEMUTimer *ts, int64_t expire_time) |
db1a4972 | 371 | { |
978f2205 | 372 | QEMUTimerList *timer_list = ts->timer_list; |
db1a4972 PB |
373 | QEMUTimer **pt, *t; |
374 | ||
978f2205 SH |
375 | qemu_mutex_lock(&timer_list->active_timers_lock); |
376 | timer_del_locked(timer_list, ts); | |
db1a4972 PB |
377 | |
378 | /* add the timer in the sorted list */ | |
978f2205 | 379 | pt = &timer_list->active_timers; |
db1a4972 PB |
380 | for(;;) { |
381 | t = *pt; | |
e93379b0 | 382 | if (!timer_expired_ns(t, expire_time)) { |
db1a4972 | 383 | break; |
45c7b37f | 384 | } |
db1a4972 PB |
385 | pt = &t->next; |
386 | } | |
3db1ee7c | 387 | ts->expire_time = MAX(expire_time, 0); |
db1a4972 PB |
388 | ts->next = *pt; |
389 | *pt = ts; | |
978f2205 | 390 | qemu_mutex_unlock(&timer_list->active_timers_lock); |
db1a4972 PB |
391 | |
392 | /* Rearm if necessary */ | |
978f2205 | 393 | if (pt == &timer_list->active_timers) { |
db1a4972 | 394 | /* Interrupt execution to force deadline recalculation. */ |
978f2205 SH |
395 | qemu_clock_warp(timer_list->clock->type); |
396 | timerlist_notify(timer_list); | |
db1a4972 PB |
397 | } |
398 | } | |
399 | ||
40daca54 | 400 | void timer_mod(QEMUTimer *ts, int64_t expire_time) |
4a998740 | 401 | { |
40daca54 | 402 | timer_mod_ns(ts, expire_time * ts->scale); |
4a998740 PB |
403 | } |
404 | ||
e93379b0 | 405 | bool timer_pending(QEMUTimer *ts) |
db1a4972 | 406 | { |
3db1ee7c | 407 | return ts->expire_time >= 0; |
db1a4972 PB |
408 | } |
409 | ||
e93379b0 | 410 | bool timer_expired(QEMUTimer *timer_head, int64_t current_time) |
db1a4972 | 411 | { |
e93379b0 | 412 | return timer_expired_ns(timer_head, current_time * timer_head->scale); |
db1a4972 PB |
413 | } |
414 | ||
ff83c66e | 415 | bool timerlist_run_timers(QEMUTimerList *timer_list) |
db1a4972 | 416 | { |
144b97c2 | 417 | QEMUTimer *ts; |
db1a4972 | 418 | int64_t current_time; |
f9a976b7 | 419 | bool progress = false; |
978f2205 SH |
420 | QEMUTimerCB *cb; |
421 | void *opaque; | |
422 | ||
3c053411 | 423 | qemu_event_reset(&timer_list->timers_done_ev); |
ff83c66e | 424 | if (!timer_list->clock->enabled) { |
3c053411 | 425 | goto out; |
ff83c66e | 426 | } |
db1a4972 | 427 | |
40daca54 | 428 | current_time = qemu_clock_get_ns(timer_list->clock->type); |
db1a4972 | 429 | for(;;) { |
978f2205 | 430 | qemu_mutex_lock(&timer_list->active_timers_lock); |
ff83c66e | 431 | ts = timer_list->active_timers; |
e93379b0 | 432 | if (!timer_expired_ns(ts, current_time)) { |
978f2205 | 433 | qemu_mutex_unlock(&timer_list->active_timers_lock); |
db1a4972 | 434 | break; |
45c7b37f | 435 | } |
978f2205 | 436 | |
db1a4972 | 437 | /* remove timer from the list before calling the callback */ |
ff83c66e | 438 | timer_list->active_timers = ts->next; |
db1a4972 | 439 | ts->next = NULL; |
3db1ee7c | 440 | ts->expire_time = -1; |
978f2205 SH |
441 | cb = ts->cb; |
442 | opaque = ts->opaque; | |
443 | qemu_mutex_unlock(&timer_list->active_timers_lock); | |
db1a4972 PB |
444 | |
445 | /* run the callback (the timer list can be modified) */ | |
978f2205 | 446 | cb(opaque); |
f9a976b7 | 447 | progress = true; |
db1a4972 | 448 | } |
3c053411 LPF |
449 | |
450 | out: | |
451 | qemu_event_set(&timer_list->timers_done_ev); | |
f9a976b7 | 452 | return progress; |
db1a4972 PB |
453 | } |
454 | ||
40daca54 AB |
455 | bool qemu_clock_run_timers(QEMUClockType type) |
456 | { | |
7bf8fbde | 457 | return timerlist_run_timers(main_loop_tlg.tl[type]); |
40daca54 AB |
458 | } |
459 | ||
d5541d86 AB |
460 | void timerlistgroup_init(QEMUTimerListGroup *tlg, |
461 | QEMUTimerListNotifyCB *cb, void *opaque) | |
754d6a54 AB |
462 | { |
463 | QEMUClockType type; | |
464 | for (type = 0; type < QEMU_CLOCK_MAX; type++) { | |
d5541d86 | 465 | tlg->tl[type] = timerlist_new(type, cb, opaque); |
754d6a54 AB |
466 | } |
467 | } | |
468 | ||
469 | void timerlistgroup_deinit(QEMUTimerListGroup *tlg) | |
470 | { | |
471 | QEMUClockType type; | |
472 | for (type = 0; type < QEMU_CLOCK_MAX; type++) { | |
473 | timerlist_free(tlg->tl[type]); | |
474 | } | |
475 | } | |
476 | ||
477 | bool timerlistgroup_run_timers(QEMUTimerListGroup *tlg) | |
478 | { | |
479 | QEMUClockType type; | |
480 | bool progress = false; | |
481 | for (type = 0; type < QEMU_CLOCK_MAX; type++) { | |
482 | progress |= timerlist_run_timers(tlg->tl[type]); | |
483 | } | |
484 | return progress; | |
485 | } | |
486 | ||
487 | int64_t timerlistgroup_deadline_ns(QEMUTimerListGroup *tlg) | |
488 | { | |
489 | int64_t deadline = -1; | |
490 | QEMUClockType type; | |
491 | for (type = 0; type < QEMU_CLOCK_MAX; type++) { | |
40daca54 | 492 | if (qemu_clock_use_for_deadline(tlg->tl[type]->clock->type)) { |
754d6a54 AB |
493 | deadline = qemu_soonest_timeout(deadline, |
494 | timerlist_deadline_ns( | |
495 | tlg->tl[type])); | |
496 | } | |
497 | } | |
498 | return deadline; | |
499 | } | |
500 | ||
40daca54 | 501 | int64_t qemu_clock_get_ns(QEMUClockType type) |
db1a4972 | 502 | { |
691a0c9c | 503 | int64_t now, last; |
40daca54 | 504 | QEMUClock *clock = qemu_clock_ptr(type); |
691a0c9c | 505 | |
40daca54 | 506 | switch (type) { |
db1a4972 PB |
507 | case QEMU_CLOCK_REALTIME: |
508 | return get_clock(); | |
509 | default: | |
510 | case QEMU_CLOCK_VIRTUAL: | |
511 | if (use_icount) { | |
512 | return cpu_get_icount(); | |
513 | } else { | |
514 | return cpu_get_clock(); | |
515 | } | |
516 | case QEMU_CLOCK_HOST: | |
691a0c9c JK |
517 | now = get_clock_realtime(); |
518 | last = clock->last; | |
519 | clock->last = now; | |
520 | if (now < last) { | |
521 | notifier_list_notify(&clock->reset_notifiers, &now); | |
522 | } | |
523 | return now; | |
db1a4972 PB |
524 | } |
525 | } | |
526 | ||
40daca54 AB |
527 | void qemu_clock_register_reset_notifier(QEMUClockType type, |
528 | Notifier *notifier) | |
529 | { | |
530 | QEMUClock *clock = qemu_clock_ptr(type); | |
691a0c9c JK |
531 | notifier_list_add(&clock->reset_notifiers, notifier); |
532 | } | |
533 | ||
40daca54 AB |
534 | void qemu_clock_unregister_reset_notifier(QEMUClockType type, |
535 | Notifier *notifier) | |
691a0c9c | 536 | { |
31552529 | 537 | notifier_remove(notifier); |
691a0c9c JK |
538 | } |
539 | ||
db1a4972 PB |
540 | void init_clocks(void) |
541 | { | |
ff83c66e AB |
542 | QEMUClockType type; |
543 | for (type = 0; type < QEMU_CLOCK_MAX; type++) { | |
7bf8fbde | 544 | qemu_clock_init(type); |
744ca8e3 | 545 | } |
ff83c66e | 546 | |
cd758dd0 AB |
547 | #ifdef CONFIG_PRCTL_PR_SET_TIMERSLACK |
548 | prctl(PR_SET_TIMERSLACK, 1, 0, 0, 0); | |
549 | #endif | |
db1a4972 PB |
550 | } |
551 | ||
e93379b0 | 552 | uint64_t timer_expire_time_ns(QEMUTimer *ts) |
db1a4972 | 553 | { |
e93379b0 | 554 | return timer_pending(ts) ? ts->expire_time : -1; |
db1a4972 PB |
555 | } |
556 | ||
40daca54 | 557 | bool qemu_clock_run_all_timers(void) |
db1a4972 | 558 | { |
f9a976b7 | 559 | bool progress = false; |
ff83c66e | 560 | QEMUClockType type; |
6d327171 | 561 | |
ff83c66e | 562 | for (type = 0; type < QEMU_CLOCK_MAX; type++) { |
40daca54 | 563 | progress |= qemu_clock_run_timers(type); |
ff83c66e | 564 | } |
158fd3ce | 565 | |
f9a976b7 | 566 | return progress; |
db1a4972 | 567 | } |