kc3-lang/libxkbcommon/bench/bench.c

Branch : - branch - android master - tag -

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• Author : Ran Benita
  Date : 2018-07-05 18:13:14
  Hash : c8e17eed
  Message : bench: simplify the bench helpers Trim the API a bit. Also, just always use gettimeofday(), which is portable. Hopefully the system clock doesn't change while a benchmark is running. Signed-off-by: Ran Benita <ran234@gmail.com>

• bench/bench.c

• /*
   * Copyright © 2015 Kazunobu Kuriyama <kazunobu.kuriyama@nifty.com>
   *                  Ran Benita <ran234@gmail.com>
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   * DEALINGS IN THE SOFTWARE.
   */
  
  #include <assert.h>
  #include <stdio.h>
  #include <sys/time.h>
  
  #include "bench.h"
  
  void
  bench_start(struct bench *bench)
  {
      struct timeval val;
      (void) gettimeofday(&val, NULL);
      bench->start = (struct bench_time) {
          .seconds = val.tv_sec,
          .microseconds = val.tv_usec,
      };
  }
  
  void
  bench_stop(struct bench *bench)
  {
      struct timeval val;
      (void) gettimeofday(&val, NULL);
      bench->stop = (struct bench_time) {
          .seconds = val.tv_sec,
          .microseconds = val.tv_usec,
      };
  }
  
  void
  bench_elapsed(const struct bench *bench, struct bench_time *result)
  {
      result->seconds = bench->stop.seconds - bench->start.seconds;
      result->microseconds = bench->stop.microseconds - bench->start.microseconds;
      if (result->microseconds < 0) {
          result->microseconds += 1000000;
          result->seconds--;
      }
  }
  
  char *
  bench_elapsed_str(const struct bench *bench)
  {
      struct bench_time elapsed;
      char *buf;
      int ret;
  
      bench_elapsed(bench, &elapsed);
      ret = asprintf(&buf, "%ld.%06ld", elapsed.seconds, elapsed.microseconds);
      assert(ret >= 0);
  
      return buf;
  }