static void unix_rearm_timer(struct qemu_alarm_timer *t)
{
struct itimerval itv;
int64_t nearest_delta_ns = INT64_MAX;
int err;
assert(alarm_has_dynticks(t));
if (!active_timers[QEMU_CLOCK_REALTIME] &&
!active_timers[QEMU_CLOCK_VIRTUAL] &&
!active_timers[QEMU_CLOCK_HOST])
return;
nearest_delta_ns = qemu_next_alarm_deadline();
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 mm_rearm_timer(struct qemu_alarm_timer *t)
{
int nearest_delta_ms;
assert(alarm_has_dynticks(t));
if (!active_timers[QEMU_CLOCK_REALTIME] &&
!active_timers[QEMU_CLOCK_VIRTUAL] &&
!active_timers[QEMU_CLOCK_HOST]) {
return;
}
timeKillEvent(mm_timer);
nearest_delta_ms = (qemu_next_alarm_deadline() + 999999) / 1000000;
if (nearest_delta_ms < 1) {
nearest_delta_ms = 1;
}
mm_timer = timeSetEvent(nearest_delta_ms,
mm_period,
mm_alarm_handler,
(DWORD_PTR)t,
TIME_ONESHOT | TIME_CALLBACK_FUNCTION);
if (!mm_timer) {
fprintf(stderr, "Failed to re-arm win32 alarm timer %ld\n",
GetLastError());
timeEndPeriod(mm_period);
exit(1);
}
}
static void win32_rearm_timer(struct qemu_alarm_timer *t)
{
HANDLE hTimer = t->timer;
int nearest_delta_ms;
BOOLEAN success;
assert(alarm_has_dynticks(t));
if (!active_timers[QEMU_CLOCK_REALTIME] &&
!active_timers[QEMU_CLOCK_VIRTUAL] &&
!active_timers[QEMU_CLOCK_HOST])
return;
nearest_delta_ms = (qemu_next_alarm_deadline() + 999999) / 1000000;
if (nearest_delta_ms < 1) {
nearest_delta_ms = 1;
}
success = ChangeTimerQueueTimer(NULL,
hTimer,
nearest_delta_ms,
3600000);
if (!success) {
fprintf(stderr, "Failed to rearm win32 alarm timer: %ld\n",
GetLastError());
exit(-1);
}
}
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);
}
}
static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t)
{
int64_t nearest_delta_ns;
if (!rt_clock->active_timers &&
!vm_clock->active_timers &&
!host_clock->active_timers) {
return;
}
nearest_delta_ns = qemu_next_alarm_deadline();
t->rearm(t, nearest_delta_ns);
}
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;
}
if (alarm_has_dynticks(t) || qemu_next_alarm_deadline() <= 0) {
t->expired = alarm_has_dynticks(t);
t->pending = 1;
qemu_notify_event();
}
}
static void host_alarm_handler(int host_signum)
#endif
{
struct qemu_alarm_timer *t = alarm_timer;
if (!t)
return;
if (alarm_has_dynticks(t) ||
qemu_next_alarm_deadline () <= 0) {
t->expired = alarm_has_dynticks(t);
t->pending = 1;
qemu_notify_event();
}
}
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;
}
// We can actually call qemu_next_alarm_deadline() here since this
// doesn't run in a signal handler, but a different thread.
if (alarm_has_dynticks(t) || qemu_next_alarm_deadline() <= 0) {
t->expired = 1;
timer_alarm_pending = 1;
qemu_notify_event();
}
}
static void tlm_rearm_timer(struct qemu_alarm_timer *t)
{
int64_t nearest_delta_ns = INT64_MAX;
if (!active_timers[QEMU_CLOCK_REALTIME] &&
!active_timers[QEMU_CLOCK_VIRTUAL] &&
!active_timers[QEMU_CLOCK_HOST])
return;
nearest_delta_ns = qemu_next_alarm_deadline();
if (nearest_delta_ns < MIN_TIMER_REARM_NS)
nearest_delta_ns = MIN_TIMER_REARM_NS;
if (tlm_timer_start) {
tlm_timer_start(tlm_timer_opaque, NULL,
tlm_timer_handler, nearest_delta_ns);
}
}
static void host_alarm_handler(int host_signum)
#endif
{
struct qemu_alarm_timer *t = alarm_timer;
if (!t)
return;
#if 0
#define DISP_FREQ 1000
{
static int64_t delta_min = INT64_MAX;
static int64_t delta_max, delta_cum, last_clock, delta, ti;
static int count;
ti = qemu_get_clock_ns(vm_clock);
if (last_clock != 0) {
delta = ti - last_clock;
if (delta < delta_min)
delta_min = delta;
if (delta > delta_max)
delta_max = delta;
delta_cum += delta;
if (++count == DISP_FREQ) {
printf("timer: min=%" PRId64 " us max=%" PRId64 " us avg=%" PRId64 " us avg_freq=%0.3f Hz\n",
muldiv64(delta_min, 1000000, get_ticks_per_sec()),
muldiv64(delta_max, 1000000, get_ticks_per_sec()),
muldiv64(delta_cum, 1000000 / DISP_FREQ, get_ticks_per_sec()),
(double)get_ticks_per_sec() / ((double)delta_cum / DISP_FREQ));
count = 0;
delta_min = INT64_MAX;
delta_max = 0;
delta_cum = 0;
}
}
last_clock = ti;
}
#endif
if (alarm_has_dynticks(t) ||
qemu_next_alarm_deadline () <= 0) {
t->expired = alarm_has_dynticks(t);
t->pending = 1;
qemu_notify_event();
}
}
static void dynticks_rearm_timer(struct qemu_alarm_timer *t)
{
timer_t host_timer = t->timer;
struct itimerspec timeout;
int64_t nearest_delta_ns = INT64_MAX;
int64_t current_ns;
assert(alarm_has_dynticks(t));
if (!active_timers[QEMU_CLOCK_REALTIME] &&
!active_timers[QEMU_CLOCK_VIRTUAL] &&
!active_timers[QEMU_CLOCK_HOST])
return;
nearest_delta_ns = qemu_next_alarm_deadline();
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);
}
}
