thodg/got/lib/ratelimit.c

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• Hash : 211cfef0
  Author :
  Date : 2022-01-05T19:57:10
  

  use time-based rate-limiting for gotadmin progress output
  
  Suggested by naddy some time ago.
  
  ok tracey
  

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• lib/ratelimit.c

• /*
   * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #include <sys/time.h>
  
  #include <stdio.h>
  #include <limits.h>
  #include <string.h>
  #include <time.h>
  
  #include "got_lib_ratelimit.h"
  
  #include "got_error.h"
  
  void
  got_ratelimit_init(struct got_ratelimit *rl, time_t interval_sec,
      unsigned int interval_msec)
  {
  	memset(rl, 0, sizeof(*rl));
  	rl->interval.tv_sec = interval_sec;
  	rl->interval.tv_nsec = interval_msec * 1000000UL;
  }
  
  const struct got_error *
  got_ratelimit_check(int *elapsed, struct got_ratelimit *rl)
  {
  	struct timespec now, delta;
  
  	if (clock_gettime(CLOCK_MONOTONIC, &now) == -1)
  		return got_error_from_errno("clock_gettime");
  
  	if (timespecisset(&rl->last)) {
  		timespecsub(&now, &rl->last, &delta);
  		*elapsed = timespeccmp(&delta, &rl->interval, >=) ? 1 : 0;
  	} else
  		*elapsed = 1;
  
  	if (*elapsed)
  		rl->last = now;
  
  	return NULL;
  }
  

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