mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 18:05:37 +00:00
![Richard Henderson](/assets/img/avatar_default.png)
Older glibc (RHEL 5.x, Debian 5.x) does not have the _sigev_un._tid member in its structure definition, while the accompanying kernel headers do define SIGEV_THREAD_ID. We need configure to check for both before using it. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
769 lines
19 KiB
C
769 lines
19 KiB
C
/*
|
|
* QEMU System Emulator
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include "sysemu.h"
|
|
#include "net.h"
|
|
#include "monitor.h"
|
|
#include "console.h"
|
|
|
|
#include "hw/hw.h"
|
|
|
|
#include "qemu-timer.h"
|
|
|
|
#ifdef _WIN32
|
|
#include <mmsystem.h>
|
|
#endif
|
|
|
|
/***********************************************************/
|
|
/* timers */
|
|
|
|
#define QEMU_CLOCK_REALTIME 0
|
|
#define QEMU_CLOCK_VIRTUAL 1
|
|
#define QEMU_CLOCK_HOST 2
|
|
|
|
struct QEMUClock {
|
|
QEMUTimer *active_timers;
|
|
|
|
NotifierList reset_notifiers;
|
|
int64_t last;
|
|
|
|
int type;
|
|
bool enabled;
|
|
};
|
|
|
|
struct QEMUTimer {
|
|
int64_t expire_time; /* in nanoseconds */
|
|
QEMUClock *clock;
|
|
QEMUTimerCB *cb;
|
|
void *opaque;
|
|
QEMUTimer *next;
|
|
int scale;
|
|
};
|
|
|
|
struct qemu_alarm_timer {
|
|
char const *name;
|
|
int (*start)(struct qemu_alarm_timer *t);
|
|
void (*stop)(struct qemu_alarm_timer *t);
|
|
void (*rearm)(struct qemu_alarm_timer *t, int64_t nearest_delta_ns);
|
|
#if defined(__linux__)
|
|
timer_t timer;
|
|
int fd;
|
|
#elif defined(_WIN32)
|
|
HANDLE timer;
|
|
#endif
|
|
bool expired;
|
|
bool pending;
|
|
};
|
|
|
|
static struct qemu_alarm_timer *alarm_timer;
|
|
|
|
static bool qemu_timer_expired_ns(QEMUTimer *timer_head, int64_t current_time)
|
|
{
|
|
return timer_head && (timer_head->expire_time <= current_time);
|
|
}
|
|
|
|
static int64_t qemu_next_alarm_deadline(void)
|
|
{
|
|
int64_t delta = INT64_MAX;
|
|
int64_t rtdelta;
|
|
|
|
if (!use_icount && vm_clock->enabled && vm_clock->active_timers) {
|
|
delta = vm_clock->active_timers->expire_time -
|
|
qemu_get_clock_ns(vm_clock);
|
|
}
|
|
if (host_clock->enabled && host_clock->active_timers) {
|
|
int64_t hdelta = host_clock->active_timers->expire_time -
|
|
qemu_get_clock_ns(host_clock);
|
|
if (hdelta < delta) {
|
|
delta = hdelta;
|
|
}
|
|
}
|
|
if (rt_clock->enabled && rt_clock->active_timers) {
|
|
rtdelta = (rt_clock->active_timers->expire_time -
|
|
qemu_get_clock_ns(rt_clock));
|
|
if (rtdelta < delta) {
|
|
delta = rtdelta;
|
|
}
|
|
}
|
|
|
|
return delta;
|
|
}
|
|
|
|
static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t)
|
|
{
|
|
int64_t nearest_delta_ns = qemu_next_alarm_deadline();
|
|
if (nearest_delta_ns < INT64_MAX) {
|
|
t->rearm(t, nearest_delta_ns);
|
|
}
|
|
}
|
|
|
|
/* TODO: MIN_TIMER_REARM_NS should be optimized */
|
|
#define MIN_TIMER_REARM_NS 250000
|
|
|
|
#ifdef _WIN32
|
|
|
|
static int mm_start_timer(struct qemu_alarm_timer *t);
|
|
static void mm_stop_timer(struct qemu_alarm_timer *t);
|
|
static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta);
|
|
|
|
static int win32_start_timer(struct qemu_alarm_timer *t);
|
|
static void win32_stop_timer(struct qemu_alarm_timer *t);
|
|
static void win32_rearm_timer(struct qemu_alarm_timer *t, int64_t delta);
|
|
|
|
#else
|
|
|
|
static int unix_start_timer(struct qemu_alarm_timer *t);
|
|
static void unix_stop_timer(struct qemu_alarm_timer *t);
|
|
static void unix_rearm_timer(struct qemu_alarm_timer *t, int64_t delta);
|
|
|
|
#ifdef __linux__
|
|
|
|
static int dynticks_start_timer(struct qemu_alarm_timer *t);
|
|
static void dynticks_stop_timer(struct qemu_alarm_timer *t);
|
|
static void dynticks_rearm_timer(struct qemu_alarm_timer *t, int64_t delta);
|
|
|
|
#endif /* __linux__ */
|
|
|
|
#endif /* _WIN32 */
|
|
|
|
static struct qemu_alarm_timer alarm_timers[] = {
|
|
#ifndef _WIN32
|
|
#ifdef __linux__
|
|
{"dynticks", dynticks_start_timer,
|
|
dynticks_stop_timer, dynticks_rearm_timer},
|
|
#endif
|
|
{"unix", unix_start_timer, unix_stop_timer, unix_rearm_timer},
|
|
#else
|
|
{"mmtimer", mm_start_timer, mm_stop_timer, mm_rearm_timer},
|
|
{"dynticks", win32_start_timer, win32_stop_timer, win32_rearm_timer},
|
|
#endif
|
|
{NULL, }
|
|
};
|
|
|
|
static void show_available_alarms(void)
|
|
{
|
|
int i;
|
|
|
|
printf("Available alarm timers, in order of precedence:\n");
|
|
for (i = 0; alarm_timers[i].name; i++)
|
|
printf("%s\n", alarm_timers[i].name);
|
|
}
|
|
|
|
void configure_alarms(char const *opt)
|
|
{
|
|
int i;
|
|
int cur = 0;
|
|
int count = ARRAY_SIZE(alarm_timers) - 1;
|
|
char *arg;
|
|
char *name;
|
|
struct qemu_alarm_timer tmp;
|
|
|
|
if (is_help_option(opt)) {
|
|
show_available_alarms();
|
|
exit(0);
|
|
}
|
|
|
|
arg = g_strdup(opt);
|
|
|
|
/* Reorder the array */
|
|
name = strtok(arg, ",");
|
|
while (name) {
|
|
for (i = 0; i < count && alarm_timers[i].name; i++) {
|
|
if (!strcmp(alarm_timers[i].name, name))
|
|
break;
|
|
}
|
|
|
|
if (i == count) {
|
|
fprintf(stderr, "Unknown clock %s\n", name);
|
|
goto next;
|
|
}
|
|
|
|
if (i < cur)
|
|
/* Ignore */
|
|
goto next;
|
|
|
|
/* Swap */
|
|
tmp = alarm_timers[i];
|
|
alarm_timers[i] = alarm_timers[cur];
|
|
alarm_timers[cur] = tmp;
|
|
|
|
cur++;
|
|
next:
|
|
name = strtok(NULL, ",");
|
|
}
|
|
|
|
g_free(arg);
|
|
|
|
if (cur) {
|
|
/* Disable remaining timers */
|
|
for (i = cur; i < count; i++)
|
|
alarm_timers[i].name = NULL;
|
|
} else {
|
|
show_available_alarms();
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
QEMUClock *rt_clock;
|
|
QEMUClock *vm_clock;
|
|
QEMUClock *host_clock;
|
|
|
|
static QEMUClock *qemu_new_clock(int type)
|
|
{
|
|
QEMUClock *clock;
|
|
|
|
clock = g_malloc0(sizeof(QEMUClock));
|
|
clock->type = type;
|
|
clock->enabled = true;
|
|
clock->last = INT64_MIN;
|
|
notifier_list_init(&clock->reset_notifiers);
|
|
return clock;
|
|
}
|
|
|
|
void qemu_clock_enable(QEMUClock *clock, bool enabled)
|
|
{
|
|
bool old = clock->enabled;
|
|
clock->enabled = enabled;
|
|
if (enabled && !old) {
|
|
qemu_rearm_alarm_timer(alarm_timer);
|
|
}
|
|
}
|
|
|
|
int64_t qemu_clock_has_timers(QEMUClock *clock)
|
|
{
|
|
return !!clock->active_timers;
|
|
}
|
|
|
|
int64_t qemu_clock_expired(QEMUClock *clock)
|
|
{
|
|
return (clock->active_timers &&
|
|
clock->active_timers->expire_time < qemu_get_clock_ns(clock));
|
|
}
|
|
|
|
int64_t qemu_clock_deadline(QEMUClock *clock)
|
|
{
|
|
/* To avoid problems with overflow limit this to 2^32. */
|
|
int64_t delta = INT32_MAX;
|
|
|
|
if (clock->active_timers) {
|
|
delta = clock->active_timers->expire_time - qemu_get_clock_ns(clock);
|
|
}
|
|
if (delta < 0) {
|
|
delta = 0;
|
|
}
|
|
return delta;
|
|
}
|
|
|
|
QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale,
|
|
QEMUTimerCB *cb, void *opaque)
|
|
{
|
|
QEMUTimer *ts;
|
|
|
|
ts = g_malloc0(sizeof(QEMUTimer));
|
|
ts->clock = clock;
|
|
ts->cb = cb;
|
|
ts->opaque = opaque;
|
|
ts->scale = scale;
|
|
return ts;
|
|
}
|
|
|
|
void qemu_free_timer(QEMUTimer *ts)
|
|
{
|
|
g_free(ts);
|
|
}
|
|
|
|
/* stop a timer, but do not dealloc it */
|
|
void qemu_del_timer(QEMUTimer *ts)
|
|
{
|
|
QEMUTimer **pt, *t;
|
|
|
|
/* NOTE: this code must be signal safe because
|
|
qemu_timer_expired() can be called from a signal. */
|
|
pt = &ts->clock->active_timers;
|
|
for(;;) {
|
|
t = *pt;
|
|
if (!t)
|
|
break;
|
|
if (t == ts) {
|
|
*pt = t->next;
|
|
break;
|
|
}
|
|
pt = &t->next;
|
|
}
|
|
}
|
|
|
|
/* modify the current timer so that it will be fired when current_time
|
|
>= expire_time. The corresponding callback will be called. */
|
|
void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time)
|
|
{
|
|
QEMUTimer **pt, *t;
|
|
|
|
qemu_del_timer(ts);
|
|
|
|
/* add the timer in the sorted list */
|
|
/* NOTE: this code must be signal safe because
|
|
qemu_timer_expired() can be called from a signal. */
|
|
pt = &ts->clock->active_timers;
|
|
for(;;) {
|
|
t = *pt;
|
|
if (!qemu_timer_expired_ns(t, expire_time)) {
|
|
break;
|
|
}
|
|
pt = &t->next;
|
|
}
|
|
ts->expire_time = expire_time;
|
|
ts->next = *pt;
|
|
*pt = ts;
|
|
|
|
/* Rearm if necessary */
|
|
if (pt == &ts->clock->active_timers) {
|
|
if (!alarm_timer->pending) {
|
|
qemu_rearm_alarm_timer(alarm_timer);
|
|
}
|
|
/* Interrupt execution to force deadline recalculation. */
|
|
qemu_clock_warp(ts->clock);
|
|
if (use_icount) {
|
|
qemu_notify_event();
|
|
}
|
|
}
|
|
}
|
|
|
|
void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time)
|
|
{
|
|
qemu_mod_timer_ns(ts, expire_time * ts->scale);
|
|
}
|
|
|
|
bool qemu_timer_pending(QEMUTimer *ts)
|
|
{
|
|
QEMUTimer *t;
|
|
for (t = ts->clock->active_timers; t != NULL; t = t->next) {
|
|
if (t == ts) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time)
|
|
{
|
|
return qemu_timer_expired_ns(timer_head, current_time * timer_head->scale);
|
|
}
|
|
|
|
void qemu_run_timers(QEMUClock *clock)
|
|
{
|
|
QEMUTimer *ts;
|
|
int64_t current_time;
|
|
|
|
if (!clock->enabled)
|
|
return;
|
|
|
|
current_time = qemu_get_clock_ns(clock);
|
|
for(;;) {
|
|
ts = clock->active_timers;
|
|
if (!qemu_timer_expired_ns(ts, current_time)) {
|
|
break;
|
|
}
|
|
/* remove timer from the list before calling the callback */
|
|
clock->active_timers = ts->next;
|
|
ts->next = NULL;
|
|
|
|
/* run the callback (the timer list can be modified) */
|
|
ts->cb(ts->opaque);
|
|
}
|
|
}
|
|
|
|
int64_t qemu_get_clock_ns(QEMUClock *clock)
|
|
{
|
|
int64_t now, last;
|
|
|
|
switch(clock->type) {
|
|
case QEMU_CLOCK_REALTIME:
|
|
return get_clock();
|
|
default:
|
|
case QEMU_CLOCK_VIRTUAL:
|
|
if (use_icount) {
|
|
return cpu_get_icount();
|
|
} else {
|
|
return cpu_get_clock();
|
|
}
|
|
case QEMU_CLOCK_HOST:
|
|
now = get_clock_realtime();
|
|
last = clock->last;
|
|
clock->last = now;
|
|
if (now < last) {
|
|
notifier_list_notify(&clock->reset_notifiers, &now);
|
|
}
|
|
return now;
|
|
}
|
|
}
|
|
|
|
void qemu_register_clock_reset_notifier(QEMUClock *clock, Notifier *notifier)
|
|
{
|
|
notifier_list_add(&clock->reset_notifiers, notifier);
|
|
}
|
|
|
|
void qemu_unregister_clock_reset_notifier(QEMUClock *clock, Notifier *notifier)
|
|
{
|
|
notifier_remove(notifier);
|
|
}
|
|
|
|
void init_clocks(void)
|
|
{
|
|
rt_clock = qemu_new_clock(QEMU_CLOCK_REALTIME);
|
|
vm_clock = qemu_new_clock(QEMU_CLOCK_VIRTUAL);
|
|
host_clock = qemu_new_clock(QEMU_CLOCK_HOST);
|
|
}
|
|
|
|
uint64_t qemu_timer_expire_time_ns(QEMUTimer *ts)
|
|
{
|
|
return qemu_timer_pending(ts) ? ts->expire_time : -1;
|
|
}
|
|
|
|
void qemu_run_all_timers(void)
|
|
{
|
|
alarm_timer->pending = false;
|
|
|
|
/* vm time timers */
|
|
qemu_run_timers(vm_clock);
|
|
qemu_run_timers(rt_clock);
|
|
qemu_run_timers(host_clock);
|
|
|
|
/* rearm timer, if not periodic */
|
|
if (alarm_timer->expired) {
|
|
alarm_timer->expired = false;
|
|
qemu_rearm_alarm_timer(alarm_timer);
|
|
}
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
static void CALLBACK host_alarm_handler(PVOID lpParam, BOOLEAN unused)
|
|
#else
|
|
static void host_alarm_handler(int host_signum)
|
|
#endif
|
|
{
|
|
struct qemu_alarm_timer *t = alarm_timer;
|
|
if (!t)
|
|
return;
|
|
|
|
t->expired = true;
|
|
t->pending = true;
|
|
qemu_notify_event();
|
|
}
|
|
|
|
#if defined(__linux__)
|
|
|
|
#include "compatfd.h"
|
|
|
|
static int dynticks_start_timer(struct qemu_alarm_timer *t)
|
|
{
|
|
struct sigevent ev;
|
|
timer_t host_timer;
|
|
struct sigaction act;
|
|
|
|
sigfillset(&act.sa_mask);
|
|
act.sa_flags = 0;
|
|
act.sa_handler = host_alarm_handler;
|
|
|
|
sigaction(SIGALRM, &act, NULL);
|
|
|
|
/*
|
|
* Initialize ev struct to 0 to avoid valgrind complaining
|
|
* about uninitialized data in timer_create call
|
|
*/
|
|
memset(&ev, 0, sizeof(ev));
|
|
ev.sigev_value.sival_int = 0;
|
|
ev.sigev_notify = SIGEV_SIGNAL;
|
|
#ifdef CONFIG_SIGEV_THREAD_ID
|
|
if (qemu_signalfd_available()) {
|
|
ev.sigev_notify = SIGEV_THREAD_ID;
|
|
ev._sigev_un._tid = qemu_get_thread_id();
|
|
}
|
|
#endif /* CONFIG_SIGEV_THREAD_ID */
|
|
ev.sigev_signo = SIGALRM;
|
|
|
|
if (timer_create(CLOCK_REALTIME, &ev, &host_timer)) {
|
|
perror("timer_create");
|
|
return -1;
|
|
}
|
|
|
|
t->timer = host_timer;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dynticks_stop_timer(struct qemu_alarm_timer *t)
|
|
{
|
|
timer_t host_timer = t->timer;
|
|
|
|
timer_delete(host_timer);
|
|
}
|
|
|
|
static void dynticks_rearm_timer(struct qemu_alarm_timer *t,
|
|
int64_t nearest_delta_ns)
|
|
{
|
|
timer_t host_timer = t->timer;
|
|
struct itimerspec timeout;
|
|
int64_t current_ns;
|
|
|
|
if (nearest_delta_ns < MIN_TIMER_REARM_NS)
|
|
nearest_delta_ns = MIN_TIMER_REARM_NS;
|
|
|
|
/* check whether a timer is already running */
|
|
if (timer_gettime(host_timer, &timeout)) {
|
|
perror("gettime");
|
|
fprintf(stderr, "Internal timer error: aborting\n");
|
|
exit(1);
|
|
}
|
|
current_ns = timeout.it_value.tv_sec * 1000000000LL + timeout.it_value.tv_nsec;
|
|
if (current_ns && current_ns <= nearest_delta_ns)
|
|
return;
|
|
|
|
timeout.it_interval.tv_sec = 0;
|
|
timeout.it_interval.tv_nsec = 0; /* 0 for one-shot timer */
|
|
timeout.it_value.tv_sec = nearest_delta_ns / 1000000000;
|
|
timeout.it_value.tv_nsec = nearest_delta_ns % 1000000000;
|
|
if (timer_settime(host_timer, 0 /* RELATIVE */, &timeout, NULL)) {
|
|
perror("settime");
|
|
fprintf(stderr, "Internal timer error: aborting\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
#endif /* defined(__linux__) */
|
|
|
|
#if !defined(_WIN32)
|
|
|
|
static int unix_start_timer(struct qemu_alarm_timer *t)
|
|
{
|
|
struct sigaction act;
|
|
|
|
/* timer signal */
|
|
sigfillset(&act.sa_mask);
|
|
act.sa_flags = 0;
|
|
act.sa_handler = host_alarm_handler;
|
|
|
|
sigaction(SIGALRM, &act, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static void unix_rearm_timer(struct qemu_alarm_timer *t,
|
|
int64_t nearest_delta_ns)
|
|
{
|
|
struct itimerval itv;
|
|
int err;
|
|
|
|
if (nearest_delta_ns < MIN_TIMER_REARM_NS)
|
|
nearest_delta_ns = MIN_TIMER_REARM_NS;
|
|
|
|
itv.it_interval.tv_sec = 0;
|
|
itv.it_interval.tv_usec = 0; /* 0 for one-shot timer */
|
|
itv.it_value.tv_sec = nearest_delta_ns / 1000000000;
|
|
itv.it_value.tv_usec = (nearest_delta_ns % 1000000000) / 1000;
|
|
err = setitimer(ITIMER_REAL, &itv, NULL);
|
|
if (err) {
|
|
perror("setitimer");
|
|
fprintf(stderr, "Internal timer error: aborting\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
static void unix_stop_timer(struct qemu_alarm_timer *t)
|
|
{
|
|
struct itimerval itv;
|
|
|
|
memset(&itv, 0, sizeof(itv));
|
|
setitimer(ITIMER_REAL, &itv, NULL);
|
|
}
|
|
|
|
#endif /* !defined(_WIN32) */
|
|
|
|
|
|
#ifdef _WIN32
|
|
|
|
static MMRESULT mm_timer;
|
|
static TIMECAPS mm_tc;
|
|
|
|
static void CALLBACK mm_alarm_handler(UINT uTimerID, UINT uMsg,
|
|
DWORD_PTR dwUser, DWORD_PTR dw1,
|
|
DWORD_PTR dw2)
|
|
{
|
|
struct qemu_alarm_timer *t = alarm_timer;
|
|
if (!t) {
|
|
return;
|
|
}
|
|
t->expired = true;
|
|
t->pending = true;
|
|
qemu_notify_event();
|
|
}
|
|
|
|
static int mm_start_timer(struct qemu_alarm_timer *t)
|
|
{
|
|
timeGetDevCaps(&mm_tc, sizeof(mm_tc));
|
|
|
|
timeBeginPeriod(mm_tc.wPeriodMin);
|
|
|
|
mm_timer = timeSetEvent(mm_tc.wPeriodMin, /* interval (ms) */
|
|
mm_tc.wPeriodMin, /* resolution */
|
|
mm_alarm_handler, /* function */
|
|
(DWORD_PTR)t, /* parameter */
|
|
TIME_ONESHOT | TIME_CALLBACK_FUNCTION);
|
|
|
|
if (!mm_timer) {
|
|
fprintf(stderr, "Failed to initialize win32 alarm timer\n");
|
|
timeEndPeriod(mm_tc.wPeriodMin);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mm_stop_timer(struct qemu_alarm_timer *t)
|
|
{
|
|
timeKillEvent(mm_timer);
|
|
timeEndPeriod(mm_tc.wPeriodMin);
|
|
}
|
|
|
|
static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta)
|
|
{
|
|
int64_t nearest_delta_ms = delta / 1000000;
|
|
if (nearest_delta_ms < mm_tc.wPeriodMin) {
|
|
nearest_delta_ms = mm_tc.wPeriodMin;
|
|
} else if (nearest_delta_ms > mm_tc.wPeriodMax) {
|
|
nearest_delta_ms = mm_tc.wPeriodMax;
|
|
}
|
|
|
|
timeKillEvent(mm_timer);
|
|
mm_timer = timeSetEvent((UINT)nearest_delta_ms,
|
|
mm_tc.wPeriodMin,
|
|
mm_alarm_handler,
|
|
(DWORD_PTR)t,
|
|
TIME_ONESHOT | TIME_CALLBACK_FUNCTION);
|
|
|
|
if (!mm_timer) {
|
|
fprintf(stderr, "Failed to re-arm win32 alarm timer\n");
|
|
timeEndPeriod(mm_tc.wPeriodMin);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
static int win32_start_timer(struct qemu_alarm_timer *t)
|
|
{
|
|
HANDLE hTimer;
|
|
BOOLEAN success;
|
|
|
|
/* If you call ChangeTimerQueueTimer on a one-shot timer (its period
|
|
is zero) that has already expired, the timer is not updated. Since
|
|
creating a new timer is relatively expensive, set a bogus one-hour
|
|
interval in the dynticks case. */
|
|
success = CreateTimerQueueTimer(&hTimer,
|
|
NULL,
|
|
host_alarm_handler,
|
|
t,
|
|
1,
|
|
3600000,
|
|
WT_EXECUTEINTIMERTHREAD);
|
|
|
|
if (!success) {
|
|
fprintf(stderr, "Failed to initialize win32 alarm timer: %ld\n",
|
|
GetLastError());
|
|
return -1;
|
|
}
|
|
|
|
t->timer = hTimer;
|
|
return 0;
|
|
}
|
|
|
|
static void win32_stop_timer(struct qemu_alarm_timer *t)
|
|
{
|
|
HANDLE hTimer = t->timer;
|
|
|
|
if (hTimer) {
|
|
DeleteTimerQueueTimer(NULL, hTimer, NULL);
|
|
}
|
|
}
|
|
|
|
static void win32_rearm_timer(struct qemu_alarm_timer *t,
|
|
int64_t nearest_delta_ns)
|
|
{
|
|
HANDLE hTimer = t->timer;
|
|
int64_t nearest_delta_ms;
|
|
BOOLEAN success;
|
|
|
|
nearest_delta_ms = nearest_delta_ns / 1000000;
|
|
if (nearest_delta_ms < 1) {
|
|
nearest_delta_ms = 1;
|
|
}
|
|
/* ULONG_MAX can be 32 bit */
|
|
if (nearest_delta_ms > ULONG_MAX) {
|
|
nearest_delta_ms = ULONG_MAX;
|
|
}
|
|
success = ChangeTimerQueueTimer(NULL,
|
|
hTimer,
|
|
(unsigned long) nearest_delta_ms,
|
|
3600000);
|
|
|
|
if (!success) {
|
|
fprintf(stderr, "Failed to rearm win32 alarm timer: %ld\n",
|
|
GetLastError());
|
|
exit(-1);
|
|
}
|
|
|
|
}
|
|
|
|
#endif /* _WIN32 */
|
|
|
|
static void quit_timers(void)
|
|
{
|
|
struct qemu_alarm_timer *t = alarm_timer;
|
|
alarm_timer = NULL;
|
|
t->stop(t);
|
|
}
|
|
|
|
int init_timer_alarm(void)
|
|
{
|
|
struct qemu_alarm_timer *t = NULL;
|
|
int i, err = -1;
|
|
|
|
for (i = 0; alarm_timers[i].name; i++) {
|
|
t = &alarm_timers[i];
|
|
|
|
err = t->start(t);
|
|
if (!err)
|
|
break;
|
|
}
|
|
|
|
if (err) {
|
|
err = -ENOENT;
|
|
goto fail;
|
|
}
|
|
|
|
atexit(quit_timers);
|
|
alarm_timer = t;
|
|
return 0;
|
|
|
|
fail:
|
|
return err;
|
|
}
|
|
|