+ return pt == &timer_list->active_timers;
+}
+
+static void timerlist_rearm(QEMUTimerList *timer_list)
+{
+ /* Interrupt execution to force deadline recalculation. */
+ qemu_clock_warp(timer_list->clock->type);
+ timerlist_notify(timer_list);
+}
+
+/* stop a timer, but do not dealloc it */
+void timer_del(QEMUTimer *ts)
+{
+ QEMUTimerList *timer_list = ts->timer_list;
+
+ qemu_mutex_lock(&timer_list->active_timers_lock);
+ timer_del_locked(timer_list, ts);
+ qemu_mutex_unlock(&timer_list->active_timers_lock);
+}
+
+/* modify the current timer so that it will be fired when current_time
+ >= expire_time. The corresponding callback will be called. */
+void timer_mod_ns(QEMUTimer *ts, int64_t expire_time)
+{
+ QEMUTimerList *timer_list = ts->timer_list;
+ bool rearm;
+
+ qemu_mutex_lock(&timer_list->active_timers_lock);
+ timer_del_locked(timer_list, ts);
+ rearm = timer_mod_ns_locked(timer_list, ts, expire_time);
+ qemu_mutex_unlock(&timer_list->active_timers_lock);
+
+ if (rearm) {
+ timerlist_rearm(timer_list);
+ }
+}
+
+/* modify the current timer so that it will be fired when current_time
+ >= expire_time or the current deadline, whichever comes earlier.
+ The corresponding callback will be called. */
+void timer_mod_anticipate_ns(QEMUTimer *ts, int64_t expire_time)
+{
+ QEMUTimerList *timer_list = ts->timer_list;
+ bool rearm;
+
+ qemu_mutex_lock(&timer_list->active_timers_lock);
+ if (ts->expire_time == -1 || ts->expire_time > expire_time) {
+ if (ts->expire_time != -1) {
+ timer_del_locked(timer_list, ts);
+ }
+ rearm = timer_mod_ns_locked(timer_list, ts, expire_time);
+ } else {
+ rearm = false;
+ }
+ qemu_mutex_unlock(&timer_list->active_timers_lock);
+
+ if (rearm) {
+ timerlist_rearm(timer_list);