1/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
4 */
5
6#include "timer_utils.h"
7
8void StartTimer(ClockTimerState* ct) {
9  clock_gettime(CLOCK_REALTIME, &ct->start_time);
10}
11
12void StopTimer(ClockTimerState* ct) {
13  clock_gettime(CLOCK_REALTIME, &ct->end_time);
14}
15
16uint32_t GetDurationMsecs(ClockTimerState* ct) {
17  uint64_t start = ((uint64_t) ct->start_time.tv_sec * 1000000000 +
18                    (uint64_t) ct->start_time.tv_nsec);
19  uint64_t end = ((uint64_t) ct->end_time.tv_sec * 1000000000 +
20                  (uint64_t) ct->end_time.tv_nsec);
21  uint64_t duration_msecs = (end - start) / 1000000U;  /* Nanoseconds ->
22                                                        * Milliseconds. */
23  return (uint32_t) duration_msecs;
24}
25