From b9e3cd5d2a75f962a1e88cbe676cf875a796543d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@isc.org>
Date: Mon, 17 Feb 2025 14:58:28 +0100
Subject: [PATCH] Add isc_timer_running() function to check status of timer

In the next commit, we need to know whether the timer has been started
or stopped.  Add isc_timer_running() function that returns true if the
timer has been started.
---
 lib/isc/include/isc/timer.h | 10 ++++++++++
 lib/isc/timer.c             |  8 ++++++++
 2 files changed, 18 insertions(+)

diff --git a/lib/isc/include/isc/timer.h b/lib/isc/include/isc/timer.h
index 9d1e95a1d1..873ebd197d 100644
--- a/lib/isc/include/isc/timer.h
+++ b/lib/isc/include/isc/timer.h
@@ -152,3 +152,13 @@ isc_timer_destroy(isc_timer_t **timerp);
  *
  *\li	*timerp is NULL.
  */
+
+bool
+isc_timer_running(isc_timer_t *timer);
+/*%<
+ * Return true if the timer has been started.
+ *
+ * Requires:
+ *
+ *\li	'timer' is a valid timer*
+ */
diff --git a/lib/isc/timer.c b/lib/isc/timer.c
index 4d30409084..bfd3377f4c 100644
--- a/lib/isc/timer.c
+++ b/lib/isc/timer.c
@@ -16,6 +16,7 @@
 #include <stdbool.h>
 
 #include <isc/async.h>
+#include <isc/atomic.h>
 #include <isc/condition.h>
 #include <isc/heap.h>
 #include <isc/job.h>
@@ -196,3 +197,10 @@ isc_timer_async_destroy(isc_timer_t **timerp) {
 	isc_timer_stop(timer);
 	isc_async_run(timer->loop, timer_destroy, timer);
 }
+
+bool
+isc_timer_running(isc_timer_t *timer) {
+	REQUIRE(VALID_TIMER(timer));
+
+	return atomic_load_acquire(&timer->running);
+}