src/basic/ratelimit.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #include <stdbool.h>
   5
   6 #include "time-util.h"
   7
   8 typedef struct RateLimit {
   9         usec_t interval; /* Keep those two fields first so they can be initialized easily: */
  10         unsigned burst;  /*   RateLimit rl = { INTERVAL, BURST }; */
  11         unsigned num;
  12         usec_t begin;
  13 } RateLimit;
  14
  15 #define RATELIMIT_OFF (const RateLimit) { .interval = USEC_INFINITY, .burst = UINT_MAX }
  16
  17 static inline void ratelimit_reset(RateLimit *rl) {
  18         rl->num = rl->begin = 0;
  19 }
  20
  21 static inline bool ratelimit_configured(RateLimit *rl) {
  22         return rl->interval > 0 && rl->burst > 0;
  23 }
  24
  25 bool ratelimit_below(RateLimit *r);
  26
  27 unsigned ratelimit_num_dropped(RateLimit *r);
  28
  29 usec_t ratelimit_end(const RateLimit *rl);
  30 usec_t ratelimit_left(const RateLimit *rl);