From 53d6987f9e46927bbc9ad683c091c070ebe06658 Mon Sep 17 00:00:00 2001
From: Luca Boccassi <bluca@debian.org>
Date: Fri, 28 Apr 2023 13:10:23 +0100
Subject: [PATCH] ratelimit: add ratelimit_left helper

---
 src/basic/ratelimit.c | 9 +++++++++
 src/basic/ratelimit.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/src/basic/ratelimit.c b/src/basic/ratelimit.c
index 5675ec2f46..41ca0709e8 100644
--- a/src/basic/ratelimit.c
+++ b/src/basic/ratelimit.c
@@ -49,3 +49,12 @@ usec_t ratelimit_end(const RateLimit *rl) {
 
         return usec_add(rl->begin, rl->interval);
 }
+
+usec_t ratelimit_left(const RateLimit *rl) {
+        assert(rl);
+
+        if (rl->begin == 0)
+                return 0;
+
+        return usec_sub_unsigned(ratelimit_end(rl), now(CLOCK_MONOTONIC));
+}
diff --git a/src/basic/ratelimit.h b/src/basic/ratelimit.h
index 048084ece4..bb7160a895 100644
--- a/src/basic/ratelimit.h
+++ b/src/basic/ratelimit.h
@@ -25,3 +25,4 @@ bool ratelimit_below(RateLimit *r);
 unsigned ratelimit_num_dropped(RateLimit *r);
 
 usec_t ratelimit_end(const RateLimit *rl);
+usec_t ratelimit_left(const RateLimit *rl);