ratelimit.h

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 #ifndef fooratelimithfoo
   4 #define fooratelimithfoo
   5
   6 /***
   7   This file is part of systemd.
   8
   9   Copyright 2010 Lennart Poettering
  10
  11   systemd is free software; you can redistribute it and/or modify it
  12   under the terms of the GNU General Public License as published by
  13   the Free Software Foundation; either version 2 of the License, or
  14   (at your option) any later version.
  15
  16   systemd is distributed in the hope that it will be useful, but
  17   WITHOUT ANY WARRANTY; without even the implied warranty of
  18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19   General Public License for more details.
  20
  21   You should have received a copy of the GNU General Public License
  22   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  23 ***/
  24
  25 #include "util.h"
  26
  27 typedef struct RateLimit {
  28         usec_t interval;
  29         usec_t begin;
  30         unsigned burst;
  31         unsigned n_printed, n_missed;
  32 } RateLimit;
  33
  34 #define RATELIMIT_DEFINE(_name, _interval, _burst)       \
  35         RateLimit _name = {                              \
  36                 .interval = (_interval),                 \
  37                 .burst = (_burst),                       \
  38                 .n_printed = 0,                          \
  39                 .n_missed = 0,                           \
  40                 .begin = 0                               \
  41         }
  42
  43 #define RATELIMIT_INIT(v, _interval, _burst)             \
  44         do {                                             \
  45                 RateLimit *_r = &(v);                    \
  46                 _r->interval = (_interval);              \
  47                 _r->burst = (_burst);                    \
  48                 _r->n_printed = 0;                       \
  49                 _r->n_missed = 0;                        \
  50                 _r->begin = 0;                           \
  51         } while (false);
  52
  53 bool ratelimit_test(RateLimit *r);
  54
  55 #endif