summaryrefslogtreecommitdiffstats
path: root/src/basic/ratelimit.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/basic/ratelimit.c')
-rw-r--r--src/basic/ratelimit.c38
1 files changed, 38 insertions, 0 deletions
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;
+}