chiark / gitweb /
install: use const where we can
[elogind.git] / src / core / timer.c
index 31ef176e7e3d750c8867bc94d96d32063494262c..b90c85f8238a20b771c3441fb607fcb6781d5143 100644 (file)
@@ -26,7 +26,7 @@
 #include "timer.h"
 #include "dbus-timer.h"
 #include "special.h"
-#include "bus-errors.h"
+#include "dbus-common.h"
 
 static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = {
         [TIMER_DEAD] = UNIT_INACTIVE,
@@ -48,25 +48,30 @@ static void timer_init(Unit *u) {
         watch_init(&t->realtime_watch);
 }
 
-static void timer_done(Unit *u) {
-        Timer *t = TIMER(u);
+void timer_free_values(Timer *t) {
         TimerValue *v;
 
         assert(t);
 
         while ((v = t->values)) {
-                LIST_REMOVE(TimerValue, value, t->values, v);
+                LIST_REMOVE(value, t->values, v);
 
                 if (v->calendar_spec)
                         calendar_spec_free(v->calendar_spec);
 
                 free(v);
         }
+}
+
+static void timer_done(Unit *u) {
+        Timer *t = TIMER(u);
+
+        assert(t);
+
+        timer_free_values(t);
 
         unit_unwatch_timer(u, &t->monotonic_watch);
         unit_unwatch_timer(u, &t->realtime_watch);
-
-        unit_ref_unset(&t->unit);
 }
 
 static int timer_verify(Timer *t) {
@@ -89,11 +94,11 @@ static int timer_add_default_dependencies(Timer *t) {
 
         assert(t);
 
-        if (UNIT(t)->manager->running_as == SYSTEMD_SYSTEM) {
-                r = unit_add_dependency_by_name(UNIT(t), UNIT_BEFORE, SPECIAL_BASIC_TARGET, NULL, true);
-                if (r < 0)
-                        return r;
+        r = unit_add_dependency_by_name(UNIT(t), UNIT_BEFORE, SPECIAL_TIMERS_TARGET, NULL, true);
+        if (r < 0)
+                return r;
 
+        if (UNIT(t)->manager->running_as == SYSTEMD_SYSTEM) {
                 r = unit_add_two_dependencies_by_name(UNIT(t), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
                 if (r < 0)
                         return r;
@@ -115,20 +120,18 @@ static int timer_load(Unit *u) {
 
         if (u->load_state == UNIT_LOADED) {
 
-                if (!UNIT_DEREF(t->unit)) {
+                if (set_isempty(u->dependencies[UNIT_TRIGGERS])) {
                         Unit *x;
 
                         r = unit_load_related_unit(u, ".service", &x);
                         if (r < 0)
                                 return r;
 
-                        unit_ref_set(&t->unit, x);
+                        r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, x, true);
+                        if (r < 0)
+                                return r;
                 }
 
-                r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(t->unit), true);
-                if (r < 0)
-                        return r;
-
                 if (UNIT(t)->default_dependencies) {
                         r = timer_add_default_dependencies(t);
                         if (r < 0)
@@ -141,15 +144,18 @@ static int timer_load(Unit *u) {
 
 static void timer_dump(Unit *u, FILE *f, const char *prefix) {
         Timer *t = TIMER(u);
+        Unit *trigger;
         TimerValue *v;
 
+        trigger = UNIT_TRIGGER(u);
+
         fprintf(f,
                 "%sTimer State: %s\n"
                 "%sResult: %s\n"
                 "%sUnit: %s\n",
                 prefix, timer_state_to_string(t->state),
                 prefix, timer_result_to_string(t->result),
-                prefix, UNIT_DEREF(t->unit)->id);
+                prefix, trigger ? trigger->id : "n/a");
 
         LIST_FOREACH(value, v, t->values) {
 
@@ -170,7 +176,7 @@ static void timer_dump(Unit *u, FILE *f, const char *prefix) {
                                 "%s%s: %s\n",
                                 prefix,
                                 timer_base_to_string(v->base),
-                                strna(format_timespan(timespan1, sizeof(timespan1), v->value)));
+                                strna(format_timespan(timespan1, sizeof(timespan1), v->value, 0)));
                 }
         }
 }
@@ -245,11 +251,6 @@ static void timer_enter_waiting(Timer *t, bool initial) {
                         if (r < 0)
                                 continue;
 
-                        if (!initial && v->next_elapse < ts.realtime) {
-                                v->disabled = true;
-                                continue;
-                        }
-
                         if (!found_realtime)
                                 t->next_elapse_realtime = v->next_elapse;
                         else
@@ -278,18 +279,26 @@ static void timer_enter_waiting(Timer *t, bool initial) {
 
                         case TIMER_UNIT_ACTIVE:
 
-                                if (UNIT_DEREF(t->unit)->inactive_exit_timestamp.monotonic <= 0)
+                                base = UNIT_TRIGGER(UNIT(t))->inactive_exit_timestamp.monotonic;
+
+                                if (base <= 0)
+                                        base = t->last_trigger_monotonic;
+
+                                if (base <= 0)
                                         continue;
 
-                                base = UNIT_DEREF(t->unit)->inactive_exit_timestamp.monotonic;
                                 break;
 
                         case TIMER_UNIT_INACTIVE:
 
-                                if (UNIT_DEREF(t->unit)->inactive_enter_timestamp.monotonic <= 0)
+                                base = UNIT_TRIGGER(UNIT(t))->inactive_enter_timestamp.monotonic;
+
+                                if (base <= 0)
+                                        base = t->last_trigger_monotonic;
+
+                                if (base <= 0)
                                         continue;
 
-                                base = UNIT_DEREF(t->unit)->inactive_enter_timestamp.monotonic;
                                 break;
 
                         default:
@@ -298,7 +307,10 @@ static void timer_enter_waiting(Timer *t, bool initial) {
 
                         v->next_elapse = base + v->value;
 
-                        if (!initial && v->next_elapse < ts.monotonic) {
+                        if (!initial &&
+                            v->next_elapse < ts.monotonic &&
+                            (v->base == TIMER_ACTIVE || v->base == TIMER_BOOT || v->base == TIMER_STARTUP)) {
+                                /* This is a one time trigger, disable it now */
                                 v->disabled = true;
                                 continue;
                         }
@@ -321,9 +333,9 @@ static void timer_enter_waiting(Timer *t, bool initial) {
         if (found_monotonic) {
                 char buf[FORMAT_TIMESPAN_MAX];
                 log_debug_unit(UNIT(t)->id,
-                               "%s: Monotonic timer elapses in %s the next time.",
+                               "%s: Monotonic timer elapses in %s.",
                                UNIT(t)->id,
-                               format_timespan(buf, sizeof(buf), t->next_elapse_monotonic - ts.monotonic));
+                               format_timespan(buf, sizeof(buf), t->next_elapse_monotonic > ts.monotonic ? t->next_elapse_monotonic - ts.monotonic : 0, 0));
 
                 r = unit_watch_timer(UNIT(t), CLOCK_MONOTONIC, false, t->next_elapse_monotonic, &t->monotonic_watch);
                 if (r < 0)
@@ -334,7 +346,7 @@ static void timer_enter_waiting(Timer *t, bool initial) {
         if (found_realtime) {
                 char buf[FORMAT_TIMESTAMP_MAX];
                 log_debug_unit(UNIT(t)->id,
-                               "%s: Realtime timer elapses at %s the next time.",
+                               "%s: Realtime timer elapses at %s.",
                                UNIT(t)->id,
                                format_timestamp(buf, sizeof(buf), t->next_elapse_realtime));
 
@@ -362,13 +374,16 @@ static void timer_enter_running(Timer *t) {
         dbus_error_init(&error);
 
         /* Don't start job if we are supposed to go down */
-        if (UNIT(t)->job && UNIT(t)->job->type == JOB_STOP)
+        if (unit_stop_pending(UNIT(t)))
                 return;
 
-        r = manager_add_job(UNIT(t)->manager, JOB_START, UNIT_DEREF(t->unit), JOB_REPLACE, true, &error, NULL);
+        r = manager_add_job(UNIT(t)->manager, JOB_START, UNIT_TRIGGER(UNIT(t)),
+                            JOB_REPLACE, true, &error, NULL);
         if (r < 0)
                 goto fail;
 
+        t->last_trigger_monotonic = now(CLOCK_MONOTONIC);
+
         timer_set_state(t, TIMER_RUNNING);
         return;
 
@@ -387,7 +402,7 @@ static int timer_start(Unit *u) {
         assert(t);
         assert(t->state == TIMER_DEAD || t->state == TIMER_FAILED);
 
-        if (UNIT_DEREF(t->unit)->load_state != UNIT_LOADED)
+        if (UNIT_TRIGGER(u)->load_state != UNIT_LOADED)
                 return -ENOENT;
 
         t->result = TIMER_SUCCESS;
@@ -449,13 +464,13 @@ static int timer_deserialize_item(Unit *u, const char *key, const char *value, F
         return 0;
 }
 
-static UnitActiveState timer_active_state(Unit *u) {
+_pure_ static UnitActiveState timer_active_state(Unit *u) {
         assert(u);
 
         return state_translation_table[TIMER(u)->state];
 }
 
-static const char *timer_sub_state_to_string(Unit *u) {
+_pure_ static const char *timer_sub_state_to_string(Unit *u) {
         assert(u);
 
         return timer_state_to_string(TIMER(u)->state);
@@ -474,58 +489,47 @@ static void timer_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
         timer_enter_running(t);
 }
 
-void timer_unit_notify(Unit *u, UnitActiveState new_state) {
-        Iterator i;
-        Unit *k;
-
-        if (u->type == UNIT_TIMER)
-                return;
+static void timer_trigger_notify(Unit *u, Unit *other) {
+        Timer *t = TIMER(u);
+        TimerValue *v;
 
-        SET_FOREACH(k, u->dependencies[UNIT_TRIGGERED_BY], i) {
-                Timer *t;
-                TimerValue *v;
+        assert(u);
+        assert(other);
 
-                if (k->type != UNIT_TIMER)
-                        continue;
+        if (other->load_state != UNIT_LOADED)
+                return;
 
-                if (k->load_state != UNIT_LOADED)
-                        continue;
+        /* Reenable all timers that depend on unit state */
+        LIST_FOREACH(value, v, t->values)
+                if (v->base == TIMER_UNIT_ACTIVE ||
+                    v->base == TIMER_UNIT_INACTIVE)
+                        v->disabled = false;
 
-                t = TIMER(k);
+        switch (t->state) {
 
-                /* Reenable all timers that depend on unit state */
-                LIST_FOREACH(value, v, t->values)
-                        if (v->base == TIMER_UNIT_ACTIVE ||
-                            v->base == TIMER_UNIT_INACTIVE)
-                                v->disabled = false;
+        case TIMER_WAITING:
+        case TIMER_ELAPSED:
 
-                switch (t->state) {
+                /* Recalculate sleep time */
+                timer_enter_waiting(t, false);
+                break;
 
-                case TIMER_WAITING:
-                case TIMER_ELAPSED:
+        case TIMER_RUNNING:
 
-                        /* Recalculate sleep time */
+                if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) {
+                        log_debug_unit(UNIT(t)->id,
+                                       "%s got notified about unit deactivation.",
+                                       UNIT(t)->id);
                         timer_enter_waiting(t, false);
-                        break;
-
-                case TIMER_RUNNING:
-
-                        if (UNIT_IS_INACTIVE_OR_FAILED(new_state)) {
-                                log_debug_unit(UNIT(t)->id,
-                                               "%s got notified about unit deactivation.",
-                                               UNIT(t)->id);
-                                timer_enter_waiting(t, false);
-                        }
-
-                        break;
+                }
+                break;
 
-                case TIMER_DEAD:
-                case TIMER_FAILED:
-                        break;
+        case TIMER_DEAD:
+        case TIMER_FAILED:
+                break;
 
-                default:
-                        assert_not_reached("Unknown timer state");
-                }
+        default:
+                assert_not_reached("Unknown timer state");
         }
 }
 
@@ -548,8 +552,8 @@ static void timer_time_change(Unit *u) {
         if (t->state != TIMER_WAITING)
                 return;
 
-        log_info_unit(u->id,
-                      "%s: time change, recalculating next elapse.", u->id);
+        log_debug_unit(u->id,
+                       "%s: time change, recalculating next elapse.", u->id);
         timer_enter_waiting(t, false);
 }
 
@@ -607,6 +611,8 @@ const UnitVTable timer_vtable = {
 
         .timer_event = timer_timer_event,
 
+        .trigger_notify = timer_trigger_notify,
+
         .reset_failed = timer_reset_failed,
         .time_change = timer_time_change,