nbd: add git tree to MAINTAINERS

[qemu.git] / qemu-timer.c

diff --git a/qemu-timer.c b/qemu-timer.c
index 8129af6ede29c739fa93336bd1a2a66392055e59..a22f27e9f8862887b747a828fd50be43e2154373 100644 (file)
--- a/qemu-timer.c
+++ b/qemu-timer.c
@@ -183,10 +183,8 @@ static struct qemu_alarm_timer alarm_timers[] = {
 #endif
     {"unix", unix_start_timer, unix_stop_timer, unix_rearm_timer},
 #else
-    {"mmtimer", mm_start_timer, mm_stop_timer, NULL},
-    {"mmtimer2", mm_start_timer, mm_stop_timer, mm_rearm_timer},
+    {"mmtimer", mm_start_timer, mm_stop_timer, mm_rearm_timer},
     {"dynticks", win32_start_timer, win32_stop_timer, win32_rearm_timer},
-    {"win32", win32_start_timer, win32_stop_timer, NULL},
 #endif
     {NULL, }
 };
@@ -266,17 +264,18 @@ static QEMUClock *qemu_new_clock(int type)
     clock = g_malloc0(sizeof(QEMUClock));
     clock->type = type;
     clock->enabled = 1;
+    clock->last = INT64_MIN;
     notifier_list_init(&clock->reset_notifiers);
-    /* required to detect & report backward jumps */
-    if (type == QEMU_CLOCK_HOST) {
-        clock->last = get_clock_realtime();
-    }
     return clock;
 }
 
 void qemu_clock_enable(QEMUClock *clock, int 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)
@@ -344,7 +343,7 @@ void qemu_del_timer(QEMUTimer *ts)
 
 /* modify the current timer so that it will be fired when current_time
    >= expire_time. The corresponding callback will be called. */
-static void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time)
+void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time)
 {
     QEMUTimer **pt, *t;
 
@@ -378,8 +377,6 @@ static void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time)
     }
 }
 
-/* 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(QEMUTimer *ts, int64_t expire_time)
 {
     qemu_mod_timer_ns(ts, expire_time * ts->scale);
@@ -464,33 +461,11 @@ 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);
-
-    rtc_clock = host_clock;
 }
 
-/* save a timer */
-void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
+uint64_t qemu_timer_expire_time_ns(QEMUTimer *ts)
 {
-    uint64_t expire_time;
-
-    if (qemu_timer_pending(ts)) {
-        expire_time = ts->expire_time;
-    } else {
-        expire_time = -1;
-    }
-    qemu_put_be64(f, expire_time);
-}
-
-void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
-{
-    uint64_t expire_time;
-
-    expire_time = qemu_get_be64(f);
-    if (expire_time != -1) {
-        qemu_mod_timer_ns(ts, expire_time);
-    } else {
-        qemu_del_timer(ts);
-    }
+    return qemu_timer_pending(ts) ? ts->expire_time : -1;
 }
 
 void qemu_run_all_timers(void)
@@ -504,10 +479,7 @@ void qemu_run_all_timers(void)
     }
 
     /* vm time timers */
-    if (runstate_is_running()) {
-        qemu_run_timers(vm_clock);
-    }
-
+    qemu_run_timers(vm_clock);
     qemu_run_timers(rt_clock);
     qemu_run_timers(host_clock);
 }
@@ -522,35 +494,6 @@ static void host_alarm_handler(int host_signum)
     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);
@@ -836,11 +779,11 @@ static void win32_rearm_timer(struct qemu_alarm_timer *t,
 
 #endif /* _WIN32 */
 
-static void alarm_timer_on_change_state_rearm(void *opaque, int running,
-                                              RunState state)
+static void quit_timers(void)
 {
-    if (running)
-        qemu_rearm_alarm_timer((struct qemu_alarm_timer *) opaque);
+    struct qemu_alarm_timer *t = alarm_timer;
+    alarm_timer = NULL;
+    t->stop(t);
 }
 
 int init_timer_alarm(void)
@@ -862,9 +805,9 @@ int init_timer_alarm(void)
     }
 
     /* first event is at time 0 */
+    atexit(quit_timers);
     t->pending = 1;
     alarm_timer = t;
-    qemu_add_vm_change_state_handler(alarm_timer_on_change_state_rearm, t);
 
     return 0;
 
@@ -872,13 +815,6 @@ fail:
     return err;
 }
 
-void quit_timers(void)
-{
-    struct qemu_alarm_timer *t = alarm_timer;
-    alarm_timer = NULL;
-    t->stop(t);
-}
-
 int qemu_calculate_timeout(void)
 {
     return 1000;