From 2cb7e0aaedad73b076ea18c6900b0e86c5760d79 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 15:00:47 +0200
Subject: Adding upstream version 247.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/basic/ratelimit.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 src/basic/ratelimit.c

(limited to 'src/basic/ratelimit.c')

diff --git a/src/basic/ratelimit.c b/src/basic/ratelimit.c
new file mode 100644
index 0000000..bae2ec3
--- /dev/null
+++ b/src/basic/ratelimit.c
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <sys/time.h>
+
+#include "macro.h"
+#include "ratelimit.h"
+
+/* Modelled after Linux' lib/ratelimit.c by Dave Young
+ * <hidave.darkstar@gmail.com>, which is licensed GPLv2. */
+
+bool ratelimit_below(RateLimit *r) {
+        usec_t ts;
+
+        assert(r);
+
+        if (!ratelimit_configured(r))
+                return true;
+
+        ts = now(CLOCK_MONOTONIC);
+
+        if (r->begin <= 0 ||
+            ts - r->begin > r->interval) {
+                r->begin = ts;
+
+                /* Reset counter */
+                r->num = 0;
+                goto good;
+        }
+
+        if (r->num < r->burst)
+                goto good;
+
+        return false;
+
+good:
+        r->num++;
+        return true;
+}
-- 
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