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Paolo Bonzinidb1a4972010-03-10 11:38:55 +01001/*
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
Paolo Bonzini9c17d612012-12-17 18:20:04 +010025#include "sysemu/sysemu.h"
Paolo Bonzini83c90892012-12-17 18:19:49 +010026#include "monitor/monitor.h"
Paolo Bonzini28ecbae2012-11-28 12:06:30 +010027#include "ui/console.h"
Paolo Bonzinidb1a4972010-03-10 11:38:55 +010028
29#include "hw/hw.h"
30
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010031#include "qemu/timer.h"
Anthony Liguori30ea8332012-11-02 16:12:53 -050032#ifdef CONFIG_POSIX
33#include <pthread.h>
34#endif
Stefan Weilbff9f8b2012-04-20 10:27:06 +020035
Alex Bligh4e0c6522013-08-21 16:02:43 +010036#ifdef CONFIG_PPOLL
37#include <poll.h>
38#endif
39
Alex Blighcd758dd2013-08-21 16:02:44 +010040#ifdef CONFIG_PRCTL_PR_SET_TIMERSLACK
41#include <sys/prctl.h>
42#endif
43
Paolo Bonzinidb1a4972010-03-10 11:38:55 +010044/***********************************************************/
45/* timers */
46
Alex Blighb4049b72013-08-21 16:03:09 +010047typedef struct QEMUClock {
Liu Ping Fan3c053412013-09-25 14:21:00 +080048 /* We rely on BQL to protect the timerlists */
Alex Blighff83c662013-08-21 16:02:46 +010049 QLIST_HEAD(, QEMUTimerList) timerlists;
Jan Kiszka691a0c92011-06-20 14:06:27 +020050
51 NotifierList reset_notifiers;
52 int64_t last;
Stefan Weil9a14b292012-04-20 11:51:58 +020053
Alex Blighff83c662013-08-21 16:02:46 +010054 QEMUClockType type;
Stefan Weil9a14b292012-04-20 11:51:58 +020055 bool enabled;
Alex Blighb4049b72013-08-21 16:03:09 +010056} QEMUClock;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +010057
Alex Bligh754d6a52013-08-21 16:02:48 +010058QEMUTimerListGroup main_loop_tlg;
Stefan Weilfbdb6642014-05-03 08:12:15 +020059static QEMUClock qemu_clocks[QEMU_CLOCK_MAX];
Alex Blighff83c662013-08-21 16:02:46 +010060
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
68struct QEMUTimerList {
Stefan Weil9a14b292012-04-20 11:51:58 +020069 QEMUClock *clock;
Stefan Hajnoczi978f2202013-09-12 11:02:19 +020070 QemuMutex active_timers_lock;
Alex Blighff83c662013-08-21 16:02:46 +010071 QEMUTimer *active_timers;
72 QLIST_ENTRY(QEMUTimerList) list;
Alex Blighd5541d82013-08-21 16:02:50 +010073 QEMUTimerListNotifyCB *notify_cb;
74 void *notify_opaque;
Liu Ping Fan3c053412013-09-25 14:21:00 +080075
76 /* lightweight method to mark the end of timerlist's running */
77 QemuEvent timers_done_ev;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +010078};
79
Alex Bligh7bf8fbd2013-08-21 16:03:03 +010080/**
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 */
Alex Blighb4049b72013-08-21 16:03:09 +010088static inline QEMUClock *qemu_clock_ptr(QEMUClockType type)
Alex Bligh7bf8fbd2013-08-21 16:03:03 +010089{
90 return &qemu_clocks[type];
91}
92
Alex Blighe93379b2013-08-21 16:02:39 +010093static bool timer_expired_ns(QEMUTimer *timer_head, int64_t current_time)
Stefan Weil45c7b372011-03-24 21:31:24 +010094{
95 return timer_head && (timer_head->expire_time <= current_time);
96}
97
Alex Bligh7bf8fbd2013-08-21 16:03:03 +010098QEMUTimerList *timerlist_new(QEMUClockType type,
99 QEMUTimerListNotifyCB *cb,
100 void *opaque)
Alex Blighff83c662013-08-21 16:02:46 +0100101{
102 QEMUTimerList *timer_list;
Alex Bligh7bf8fbd2013-08-21 16:03:03 +0100103 QEMUClock *clock = qemu_clock_ptr(type);
Alex Blighff83c662013-08-21 16:02:46 +0100104
105 timer_list = g_malloc0(sizeof(QEMUTimerList));
Liu Ping Fan3c053412013-09-25 14:21:00 +0800106 qemu_event_init(&timer_list->timers_done_ev, false);
Alex Blighff83c662013-08-21 16:02:46 +0100107 timer_list->clock = clock;
Alex Blighd5541d82013-08-21 16:02:50 +0100108 timer_list->notify_cb = cb;
109 timer_list->notify_opaque = opaque;
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200110 qemu_mutex_init(&timer_list->active_timers_lock);
Alex Blighff83c662013-08-21 16:02:46 +0100111 QLIST_INSERT_HEAD(&clock->timerlists, timer_list, list);
112 return timer_list;
113}
114
Alex Blighff83c662013-08-21 16:02:46 +0100115void timerlist_free(QEMUTimerList *timer_list)
116{
117 assert(!timerlist_has_timers(timer_list));
118 if (timer_list->clock) {
119 QLIST_REMOVE(timer_list, list);
Alex Blighff83c662013-08-21 16:02:46 +0100120 }
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200121 qemu_mutex_destroy(&timer_list->active_timers_lock);
Alex Blighff83c662013-08-21 16:02:46 +0100122 g_free(timer_list);
123}
124
Alex Bligh7bf8fbd2013-08-21 16:03:03 +0100125static void qemu_clock_init(QEMUClockType type)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100126{
Alex Bligh7bf8fbd2013-08-21 16:03:03 +0100127 QEMUClock *clock = qemu_clock_ptr(type);
Jan Kiszka691a0c92011-06-20 14:06:27 +0200128
Kirill Batuzov02ce2322014-05-06 16:59:53 +0400129 /* Assert that the clock of type TYPE has not been initialized yet. */
130 assert(main_loop_tlg.tl[type] == NULL);
131
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100132 clock->type = type;
Stefan Weil5e1ec7b2012-04-20 10:45:48 +0200133 clock->enabled = true;
Paolo Bonzini2ff68d02011-09-12 16:21:44 +0200134 clock->last = INT64_MIN;
Alex Blighff83c662013-08-21 16:02:46 +0100135 QLIST_INIT(&clock->timerlists);
Jan Kiszka691a0c92011-06-20 14:06:27 +0200136 notifier_list_init(&clock->reset_notifiers);
Alex Bligh7bf8fbd2013-08-21 16:03:03 +0100137 main_loop_tlg.tl[type] = timerlist_new(type, NULL, NULL);
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100138}
139
Alex Bligh40daca52013-08-21 16:03:02 +0100140bool qemu_clock_use_for_deadline(QEMUClockType type)
Alex Blighff83c662013-08-21 16:02:46 +0100141{
Alex Bligh40daca52013-08-21 16:03:02 +0100142 return !(use_icount && (type == QEMU_CLOCK_VIRTUAL));
Alex Blighff83c662013-08-21 16:02:46 +0100143}
144
Alex Bligh40daca52013-08-21 16:03:02 +0100145void qemu_clock_notify(QEMUClockType type)
Alex Blighb1bbfe72013-08-21 16:02:55 +0100146{
147 QEMUTimerList *timer_list;
Alex Bligh40daca52013-08-21 16:03:02 +0100148 QEMUClock *clock = qemu_clock_ptr(type);
Alex Blighb1bbfe72013-08-21 16:02:55 +0100149 QLIST_FOREACH(timer_list, &clock->timerlists, list) {
150 timerlist_notify(timer_list);
151 }
152}
153
Liu Ping Fan3c053412013-09-25 14:21:00 +0800154/* Disabling the clock will wait for related timerlists to stop
155 * executing qemu_run_timers. Thus, this functions should not
156 * be used from the callback of a timer that is based on @clock.
157 * Doing so would cause a deadlock.
158 *
159 * Caller should hold BQL.
160 */
Alex Bligh40daca52013-08-21 16:03:02 +0100161void qemu_clock_enable(QEMUClockType type, bool enabled)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100162{
Alex Bligh40daca52013-08-21 16:03:02 +0100163 QEMUClock *clock = qemu_clock_ptr(type);
Liu Ping Fan3c053412013-09-25 14:21:00 +0800164 QEMUTimerList *tl;
Paolo Bonzinifbdc14e2011-09-27 18:23:14 +0200165 bool old = clock->enabled;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100166 clock->enabled = enabled;
Paolo Bonzinifbdc14e2011-09-27 18:23:14 +0200167 if (enabled && !old) {
Alex Bligh40daca52013-08-21 16:03:02 +0100168 qemu_clock_notify(type);
Liu Ping Fan3c053412013-09-25 14:21:00 +0800169 } else if (!enabled && old) {
170 QLIST_FOREACH(tl, &clock->timerlists, list) {
171 qemu_event_wait(&tl->timers_done_ev);
172 }
Paolo Bonzinifbdc14e2011-09-27 18:23:14 +0200173 }
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100174}
175
Alex Blighff83c662013-08-21 16:02:46 +0100176bool timerlist_has_timers(QEMUTimerList *timer_list)
Paolo Bonzinidc2dfcf2011-09-12 15:50:16 +0200177{
Alex Blighff83c662013-08-21 16:02:46 +0100178 return !!timer_list->active_timers;
Paolo Bonzinidc2dfcf2011-09-12 15:50:16 +0200179}
180
Alex Bligh40daca52013-08-21 16:03:02 +0100181bool qemu_clock_has_timers(QEMUClockType type)
Paolo Bonzinidc2dfcf2011-09-12 15:50:16 +0200182{
Alex Bligh40daca52013-08-21 16:03:02 +0100183 return timerlist_has_timers(
Alex Bligh7bf8fbd2013-08-21 16:03:03 +0100184 main_loop_tlg.tl[type]);
Paolo Bonzinidc2dfcf2011-09-12 15:50:16 +0200185}
186
Alex Blighff83c662013-08-21 16:02:46 +0100187bool timerlist_expired(QEMUTimerList *timer_list)
188{
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200189 int64_t expire_time;
190
191 qemu_mutex_lock(&timer_list->active_timers_lock);
192 if (!timer_list->active_timers) {
193 qemu_mutex_unlock(&timer_list->active_timers_lock);
194 return false;
195 }
196 expire_time = timer_list->active_timers->expire_time;
197 qemu_mutex_unlock(&timer_list->active_timers_lock);
198
199 return expire_time < qemu_clock_get_ns(timer_list->clock->type);
Alex Blighff83c662013-08-21 16:02:46 +0100200}
201
Alex Bligh40daca52013-08-21 16:03:02 +0100202bool qemu_clock_expired(QEMUClockType type)
Alex Blighff83c662013-08-21 16:02:46 +0100203{
Alex Bligh40daca52013-08-21 16:03:02 +0100204 return timerlist_expired(
Alex Bligh7bf8fbd2013-08-21 16:03:03 +0100205 main_loop_tlg.tl[type]);
Alex Blighff83c662013-08-21 16:02:46 +0100206}
207
Alex Bligh02a03a92013-08-21 16:02:41 +0100208/*
209 * As above, but return -1 for no deadline, and do not cap to 2^32
210 * as we know the result is always positive.
211 */
212
Alex Blighff83c662013-08-21 16:02:46 +0100213int64_t timerlist_deadline_ns(QEMUTimerList *timer_list)
Alex Bligh02a03a92013-08-21 16:02:41 +0100214{
215 int64_t delta;
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200216 int64_t expire_time;
Alex Bligh02a03a92013-08-21 16:02:41 +0100217
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200218 if (!timer_list->clock->enabled) {
Alex Bligh02a03a92013-08-21 16:02:41 +0100219 return -1;
220 }
221
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200222 /* The active timers list may be modified before the caller uses our return
223 * value but ->notify_cb() is called when the deadline changes. Therefore
224 * the caller should notice the change and there is no race condition.
225 */
226 qemu_mutex_lock(&timer_list->active_timers_lock);
227 if (!timer_list->active_timers) {
228 qemu_mutex_unlock(&timer_list->active_timers_lock);
229 return -1;
230 }
231 expire_time = timer_list->active_timers->expire_time;
232 qemu_mutex_unlock(&timer_list->active_timers_lock);
233
234 delta = expire_time - qemu_clock_get_ns(timer_list->clock->type);
Alex Bligh02a03a92013-08-21 16:02:41 +0100235
236 if (delta <= 0) {
237 return 0;
238 }
239
240 return delta;
241}
242
Alex Blighac70aaf2013-08-21 16:02:57 +0100243/* Calculate the soonest deadline across all timerlists attached
244 * to the clock. This is used for the icount timeout so we
245 * ignore whether or not the clock should be used in deadline
246 * calculations.
247 */
Alex Bligh40daca52013-08-21 16:03:02 +0100248int64_t qemu_clock_deadline_ns_all(QEMUClockType type)
Alex Blighac70aaf2013-08-21 16:02:57 +0100249{
250 int64_t deadline = -1;
251 QEMUTimerList *timer_list;
Alex Bligh40daca52013-08-21 16:03:02 +0100252 QEMUClock *clock = qemu_clock_ptr(type);
Alex Blighac70aaf2013-08-21 16:02:57 +0100253 QLIST_FOREACH(timer_list, &clock->timerlists, list) {
254 deadline = qemu_soonest_timeout(deadline,
255 timerlist_deadline_ns(timer_list));
256 }
257 return deadline;
258}
259
Alex Bligh40daca52013-08-21 16:03:02 +0100260QEMUClockType timerlist_get_clock(QEMUTimerList *timer_list)
Alex Blighff83c662013-08-21 16:02:46 +0100261{
Alex Bligh40daca52013-08-21 16:03:02 +0100262 return timer_list->clock->type;
Alex Blighff83c662013-08-21 16:02:46 +0100263}
264
Alex Bligh40daca52013-08-21 16:03:02 +0100265QEMUTimerList *qemu_clock_get_main_loop_timerlist(QEMUClockType type)
Alex Blighff83c662013-08-21 16:02:46 +0100266{
Alex Bligh7bf8fbd2013-08-21 16:03:03 +0100267 return main_loop_tlg.tl[type];
Alex Blighff83c662013-08-21 16:02:46 +0100268}
269
Alex Blighd5541d82013-08-21 16:02:50 +0100270void timerlist_notify(QEMUTimerList *timer_list)
271{
272 if (timer_list->notify_cb) {
273 timer_list->notify_cb(timer_list->notify_opaque);
274 } else {
275 qemu_notify_event();
276 }
277}
278
Alex Bligh02a03a92013-08-21 16:02:41 +0100279/* Transition function to convert a nanosecond timeout to ms
280 * This is used where a system does not support ppoll
281 */
282int qemu_timeout_ns_to_ms(int64_t ns)
283{
284 int64_t ms;
285 if (ns < 0) {
286 return -1;
287 }
288
289 if (!ns) {
290 return 0;
291 }
292
293 /* Always round up, because it's better to wait too long than to wait too
294 * little and effectively busy-wait
295 */
296 ms = (ns + SCALE_MS - 1) / SCALE_MS;
297
298 /* To avoid overflow problems, limit this to 2^31, i.e. approx 25 days */
299 if (ms > (int64_t) INT32_MAX) {
300 ms = INT32_MAX;
301 }
302
303 return (int) ms;
304}
305
306
Alex Bligh4e0c6522013-08-21 16:02:43 +0100307/* qemu implementation of g_poll which uses a nanosecond timeout but is
308 * otherwise identical to g_poll
309 */
310int qemu_poll_ns(GPollFD *fds, guint nfds, int64_t timeout)
311{
312#ifdef CONFIG_PPOLL
313 if (timeout < 0) {
314 return ppoll((struct pollfd *)fds, nfds, NULL, NULL);
315 } else {
316 struct timespec ts;
317 ts.tv_sec = timeout / 1000000000LL;
318 ts.tv_nsec = timeout % 1000000000LL;
319 return ppoll((struct pollfd *)fds, nfds, &ts, NULL);
320 }
321#else
322 return g_poll(fds, nfds, qemu_timeout_ns_to_ms(timeout));
323#endif
324}
325
326
Alex Blighff83c662013-08-21 16:02:46 +0100327void timer_init(QEMUTimer *ts,
328 QEMUTimerList *timer_list, int scale,
329 QEMUTimerCB *cb, void *opaque)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100330{
Alex Blighff83c662013-08-21 16:02:46 +0100331 ts->timer_list = timer_list;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100332 ts->cb = cb;
333 ts->opaque = opaque;
Paolo Bonzini4a998742011-03-11 16:33:58 +0100334 ts->scale = scale;
Paolo Bonzini3db1ee72013-09-12 11:02:20 +0200335 ts->expire_time = -1;
Alex Blighff83c662013-08-21 16:02:46 +0100336}
337
Alex Bligh40daca52013-08-21 16:03:02 +0100338void timer_free(QEMUTimer *ts)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100339{
Anthony Liguori7267c092011-08-20 22:09:37 -0500340 g_free(ts);
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100341}
342
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200343static void timer_del_locked(QEMUTimerList *timer_list, QEMUTimer *ts)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100344{
345 QEMUTimer **pt, *t;
346
Paolo Bonzini3db1ee72013-09-12 11:02:20 +0200347 ts->expire_time = -1;
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200348 pt = &timer_list->active_timers;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100349 for(;;) {
350 t = *pt;
351 if (!t)
352 break;
353 if (t == ts) {
354 *pt = t->next;
355 break;
356 }
357 pt = &t->next;
358 }
359}
360
Paolo Bonzini0f809e52013-10-03 15:06:39 +0200361static bool timer_mod_ns_locked(QEMUTimerList *timer_list,
362 QEMUTimer *ts, int64_t expire_time)
363{
364 QEMUTimer **pt, *t;
365
366 /* add the timer in the sorted list */
367 pt = &timer_list->active_timers;
368 for (;;) {
369 t = *pt;
370 if (!timer_expired_ns(t, expire_time)) {
371 break;
372 }
373 pt = &t->next;
374 }
375 ts->expire_time = MAX(expire_time, 0);
376 ts->next = *pt;
377 *pt = ts;
378
379 return pt == &timer_list->active_timers;
380}
381
382static void timerlist_rearm(QEMUTimerList *timer_list)
383{
384 /* Interrupt execution to force deadline recalculation. */
385 qemu_clock_warp(timer_list->clock->type);
386 timerlist_notify(timer_list);
387}
388
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200389/* stop a timer, but do not dealloc it */
390void timer_del(QEMUTimer *ts)
391{
392 QEMUTimerList *timer_list = ts->timer_list;
393
394 qemu_mutex_lock(&timer_list->active_timers_lock);
395 timer_del_locked(timer_list, ts);
396 qemu_mutex_unlock(&timer_list->active_timers_lock);
397}
398
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100399/* modify the current timer so that it will be fired when current_time
400 >= expire_time. The corresponding callback will be called. */
Alex Bligh40daca52013-08-21 16:03:02 +0100401void timer_mod_ns(QEMUTimer *ts, int64_t expire_time)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100402{
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200403 QEMUTimerList *timer_list = ts->timer_list;
Paolo Bonzini0f809e52013-10-03 15:06:39 +0200404 bool rearm;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100405
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200406 qemu_mutex_lock(&timer_list->active_timers_lock);
407 timer_del_locked(timer_list, ts);
Paolo Bonzini0f809e52013-10-03 15:06:39 +0200408 rearm = timer_mod_ns_locked(timer_list, ts, expire_time);
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200409 qemu_mutex_unlock(&timer_list->active_timers_lock);
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100410
Paolo Bonzini0f809e52013-10-03 15:06:39 +0200411 if (rearm) {
412 timerlist_rearm(timer_list);
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100413 }
414}
415
Paolo Bonziniadd40e92013-10-03 15:11:43 +0200416/* modify the current timer so that it will be fired when current_time
417 >= expire_time or the current deadline, whichever comes earlier.
418 The corresponding callback will be called. */
419void timer_mod_anticipate_ns(QEMUTimer *ts, int64_t expire_time)
420{
421 QEMUTimerList *timer_list = ts->timer_list;
422 bool rearm;
423
424 qemu_mutex_lock(&timer_list->active_timers_lock);
425 if (ts->expire_time == -1 || ts->expire_time > expire_time) {
426 if (ts->expire_time != -1) {
427 timer_del_locked(timer_list, ts);
428 }
429 rearm = timer_mod_ns_locked(timer_list, ts, expire_time);
430 } else {
431 rearm = false;
432 }
433 qemu_mutex_unlock(&timer_list->active_timers_lock);
434
435 if (rearm) {
436 timerlist_rearm(timer_list);
437 }
438}
439
Alex Bligh40daca52013-08-21 16:03:02 +0100440void timer_mod(QEMUTimer *ts, int64_t expire_time)
Paolo Bonzini4a998742011-03-11 16:33:58 +0100441{
Alex Bligh40daca52013-08-21 16:03:02 +0100442 timer_mod_ns(ts, expire_time * ts->scale);
Paolo Bonzini4a998742011-03-11 16:33:58 +0100443}
444
Paolo Bonziniadd40e92013-10-03 15:11:43 +0200445void timer_mod_anticipate(QEMUTimer *ts, int64_t expire_time)
446{
447 timer_mod_anticipate_ns(ts, expire_time * ts->scale);
448}
449
Alex Blighe93379b2013-08-21 16:02:39 +0100450bool timer_pending(QEMUTimer *ts)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100451{
Paolo Bonzini3db1ee72013-09-12 11:02:20 +0200452 return ts->expire_time >= 0;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100453}
454
Alex Blighe93379b2013-08-21 16:02:39 +0100455bool timer_expired(QEMUTimer *timer_head, int64_t current_time)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100456{
Alex Blighe93379b2013-08-21 16:02:39 +0100457 return timer_expired_ns(timer_head, current_time * timer_head->scale);
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100458}
459
Alex Blighff83c662013-08-21 16:02:46 +0100460bool timerlist_run_timers(QEMUTimerList *timer_list)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100461{
Paolo Bonzini144b97c2012-09-19 15:52:44 +0200462 QEMUTimer *ts;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100463 int64_t current_time;
Alex Blighf9a976b2013-08-21 16:02:45 +0100464 bool progress = false;
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200465 QEMUTimerCB *cb;
466 void *opaque;
467
Liu Ping Fan3c053412013-09-25 14:21:00 +0800468 qemu_event_reset(&timer_list->timers_done_ev);
Alex Blighff83c662013-08-21 16:02:46 +0100469 if (!timer_list->clock->enabled) {
Liu Ping Fan3c053412013-09-25 14:21:00 +0800470 goto out;
Alex Blighff83c662013-08-21 16:02:46 +0100471 }
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100472
Alex Bligh40daca52013-08-21 16:03:02 +0100473 current_time = qemu_clock_get_ns(timer_list->clock->type);
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100474 for(;;) {
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200475 qemu_mutex_lock(&timer_list->active_timers_lock);
Alex Blighff83c662013-08-21 16:02:46 +0100476 ts = timer_list->active_timers;
Alex Blighe93379b2013-08-21 16:02:39 +0100477 if (!timer_expired_ns(ts, current_time)) {
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200478 qemu_mutex_unlock(&timer_list->active_timers_lock);
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100479 break;
Stefan Weil45c7b372011-03-24 21:31:24 +0100480 }
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200481
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100482 /* remove timer from the list before calling the callback */
Alex Blighff83c662013-08-21 16:02:46 +0100483 timer_list->active_timers = ts->next;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100484 ts->next = NULL;
Paolo Bonzini3db1ee72013-09-12 11:02:20 +0200485 ts->expire_time = -1;
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200486 cb = ts->cb;
487 opaque = ts->opaque;
488 qemu_mutex_unlock(&timer_list->active_timers_lock);
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100489
490 /* run the callback (the timer list can be modified) */
Stefan Hajnoczi978f2202013-09-12 11:02:19 +0200491 cb(opaque);
Alex Blighf9a976b2013-08-21 16:02:45 +0100492 progress = true;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100493 }
Liu Ping Fan3c053412013-09-25 14:21:00 +0800494
495out:
496 qemu_event_set(&timer_list->timers_done_ev);
Alex Blighf9a976b2013-08-21 16:02:45 +0100497 return progress;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100498}
499
Alex Bligh40daca52013-08-21 16:03:02 +0100500bool qemu_clock_run_timers(QEMUClockType type)
501{
Alex Bligh7bf8fbd2013-08-21 16:03:03 +0100502 return timerlist_run_timers(main_loop_tlg.tl[type]);
Alex Bligh40daca52013-08-21 16:03:02 +0100503}
504
Alex Blighd5541d82013-08-21 16:02:50 +0100505void timerlistgroup_init(QEMUTimerListGroup *tlg,
506 QEMUTimerListNotifyCB *cb, void *opaque)
Alex Bligh754d6a52013-08-21 16:02:48 +0100507{
508 QEMUClockType type;
509 for (type = 0; type < QEMU_CLOCK_MAX; type++) {
Alex Blighd5541d82013-08-21 16:02:50 +0100510 tlg->tl[type] = timerlist_new(type, cb, opaque);
Alex Bligh754d6a52013-08-21 16:02:48 +0100511 }
512}
513
514void timerlistgroup_deinit(QEMUTimerListGroup *tlg)
515{
516 QEMUClockType type;
517 for (type = 0; type < QEMU_CLOCK_MAX; type++) {
518 timerlist_free(tlg->tl[type]);
519 }
520}
521
522bool timerlistgroup_run_timers(QEMUTimerListGroup *tlg)
523{
524 QEMUClockType type;
525 bool progress = false;
526 for (type = 0; type < QEMU_CLOCK_MAX; type++) {
527 progress |= timerlist_run_timers(tlg->tl[type]);
528 }
529 return progress;
530}
531
532int64_t timerlistgroup_deadline_ns(QEMUTimerListGroup *tlg)
533{
534 int64_t deadline = -1;
535 QEMUClockType type;
536 for (type = 0; type < QEMU_CLOCK_MAX; type++) {
Alex Bligh40daca52013-08-21 16:03:02 +0100537 if (qemu_clock_use_for_deadline(tlg->tl[type]->clock->type)) {
Alex Bligh754d6a52013-08-21 16:02:48 +0100538 deadline = qemu_soonest_timeout(deadline,
539 timerlist_deadline_ns(
540 tlg->tl[type]));
541 }
542 }
543 return deadline;
544}
545
Alex Bligh40daca52013-08-21 16:03:02 +0100546int64_t qemu_clock_get_ns(QEMUClockType type)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100547{
Jan Kiszka691a0c92011-06-20 14:06:27 +0200548 int64_t now, last;
Alex Bligh40daca52013-08-21 16:03:02 +0100549 QEMUClock *clock = qemu_clock_ptr(type);
Jan Kiszka691a0c92011-06-20 14:06:27 +0200550
Alex Bligh40daca52013-08-21 16:03:02 +0100551 switch (type) {
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100552 case QEMU_CLOCK_REALTIME:
553 return get_clock();
554 default:
555 case QEMU_CLOCK_VIRTUAL:
556 if (use_icount) {
557 return cpu_get_icount();
558 } else {
559 return cpu_get_clock();
560 }
561 case QEMU_CLOCK_HOST:
Jan Kiszka691a0c92011-06-20 14:06:27 +0200562 now = get_clock_realtime();
563 last = clock->last;
564 clock->last = now;
565 if (now < last) {
566 notifier_list_notify(&clock->reset_notifiers, &now);
567 }
568 return now;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100569 }
570}
571
Alex Bligh40daca52013-08-21 16:03:02 +0100572void qemu_clock_register_reset_notifier(QEMUClockType type,
573 Notifier *notifier)
574{
575 QEMUClock *clock = qemu_clock_ptr(type);
Jan Kiszka691a0c92011-06-20 14:06:27 +0200576 notifier_list_add(&clock->reset_notifiers, notifier);
577}
578
Alex Bligh40daca52013-08-21 16:03:02 +0100579void qemu_clock_unregister_reset_notifier(QEMUClockType type,
580 Notifier *notifier)
Jan Kiszka691a0c92011-06-20 14:06:27 +0200581{
Paolo Bonzini31552522012-01-13 17:34:01 +0100582 notifier_remove(notifier);
Jan Kiszka691a0c92011-06-20 14:06:27 +0200583}
584
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100585void init_clocks(void)
586{
Alex Blighff83c662013-08-21 16:02:46 +0100587 QEMUClockType type;
588 for (type = 0; type < QEMU_CLOCK_MAX; type++) {
Alex Bligh7bf8fbd2013-08-21 16:03:03 +0100589 qemu_clock_init(type);
Paolo Bonzini744ca8e2012-10-29 15:26:28 +0100590 }
Alex Blighff83c662013-08-21 16:02:46 +0100591
Alex Blighcd758dd2013-08-21 16:02:44 +0100592#ifdef CONFIG_PRCTL_PR_SET_TIMERSLACK
593 prctl(PR_SET_TIMERSLACK, 1, 0, 0, 0);
594#endif
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100595}
596
Alex Blighe93379b2013-08-21 16:02:39 +0100597uint64_t timer_expire_time_ns(QEMUTimer *ts)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100598{
Alex Blighe93379b2013-08-21 16:02:39 +0100599 return timer_pending(ts) ? ts->expire_time : -1;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100600}
601
Alex Bligh40daca52013-08-21 16:03:02 +0100602bool qemu_clock_run_all_timers(void)
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100603{
Alex Blighf9a976b2013-08-21 16:02:45 +0100604 bool progress = false;
Alex Blighff83c662013-08-21 16:02:46 +0100605 QEMUClockType type;
Alex Bligh6d327172013-08-21 16:02:59 +0100606
Alex Blighff83c662013-08-21 16:02:46 +0100607 for (type = 0; type < QEMU_CLOCK_MAX; type++) {
Alex Bligh40daca52013-08-21 16:03:02 +0100608 progress |= qemu_clock_run_timers(type);
Alex Blighff83c662013-08-21 16:02:46 +0100609 }
Peter Portante158fd3c2012-04-05 11:00:45 -0400610
Alex Blighf9a976b2013-08-21 16:02:45 +0100611 return progress;
Paolo Bonzinidb1a4972010-03-10 11:38:55 +0100612}