From 868fd8a20ffd7d1f71cc224b41a3b61bde521bed Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 23 Apr 2013 17:42:31 -0300
Subject: [PATCH] timer: make sure we restart timers even if units are still
 running or if one of their conditions fails (cherry picked from commit
 e41e194340f9a8dbd982b5030449281c3c8bf0dd)

Conflicts:
	TODO
---
 src/core/timer.c | 30 ++++++++++++++++++------------
 src/core/timer.h |  2 ++
 2 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/src/core/timer.c b/src/core/timer.c
index b5d895f..b8039d8 100644
--- a/src/core/timer.c
+++ b/src/core/timer.c
@@ -251,11 +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
@@ -284,18 +279,26 @@ static void timer_enter_waiting(Timer *t, bool initial) {
 
                         case TIMER_UNIT_ACTIVE:
 
-                                if (UNIT_TRIGGER(UNIT(t))->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_TRIGGER(UNIT(t))->inactive_exit_timestamp.monotonic;
                                 break;
 
                         case TIMER_UNIT_INACTIVE:
 
-                                if (UNIT_TRIGGER(UNIT(t))->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_TRIGGER(UNIT(t))->inactive_enter_timestamp.monotonic;
                                 break;
 
                         default:
@@ -304,7 +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;
                         }
@@ -376,6 +382,8 @@ static void timer_enter_running(Timer *t) {
         if (r < 0)
                 goto fail;
 
+        t->last_trigger_monotonic = now(CLOCK_MONOTONIC);
+
         timer_set_state(t, TIMER_RUNNING);
         return;
 
@@ -488,8 +496,6 @@ static void timer_trigger_notify(Unit *u, Unit *other) {
         assert(u);
         assert(other);
 
-        log_error("NOTIFY!");
-
         if (other->load_state != UNIT_LOADED)
                 return;
 
diff --git a/src/core/timer.h b/src/core/timer.h
index 163bd6c..fed15e9 100644
--- a/src/core/timer.h
+++ b/src/core/timer.h
@@ -79,6 +79,8 @@ struct Timer {
         Watch realtime_watch;
 
         TimerResult result;
+
+        usec_t last_trigger_monotonic;
 };
 
 void timer_free_values(Timer *t);