Gaurav Shah | cc1dd99 | 2010-02-12 11:21:18 -0800 | [diff] [blame] | 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 | |
| 8 | void StartTimer(ClockTimerState* ct) { |
| 9 | clock_gettime(CLOCK_REALTIME, &ct->start_time); |
| 10 | } |
| 11 | |
| 12 | void StopTimer(ClockTimerState* ct) { |
| 13 | clock_gettime(CLOCK_REALTIME, &ct->end_time); |
| 14 | } |
| 15 | |
| 16 | uint32_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 | } |