From 97df9fa065767cbedadd144b0e1b193a95e7ffbd Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 20 Dec 2023 00:48:49 +0900
Subject: [PATCH] time-util: make usleep_safe() return earlier if 0 is passed

---
 src/basic/time-util.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/basic/time-util.h b/src/basic/time-util.h
index ed4c1aabd4..29373477f4 100644
--- a/src/basic/time-util.h
+++ b/src/basic/time-util.h
@@ -219,6 +219,9 @@ static inline int usleep_safe(usec_t usec) {
          * ⚠️ Note we are not using plain nanosleep() here, since that operates on CLOCK_REALTIME, not
          *    CLOCK_MONOTONIC! */
 
+        if (usec == 0)
+                return 0;
+
         // FIXME: use RET_NERRNO() macro here. Currently, this header cannot include errno-util.h.
         return clock_nanosleep(CLOCK_MONOTONIC, 0, TIMESPEC_STORE(usec), NULL) < 0 ? -errno : 0;
 }
-- 
2.25.1