src/basic/ratelimit.h

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