mtklein | 9ac68ee | 2014-06-20 11:29:20 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2011 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | #include "SysTimer_posix.h" |
| 8 | |
| 9 | static double interval_in_ms(timespec start_clock, timespec end_clock) |
| 10 | { |
| 11 | double duration_clock; |
| 12 | if ((end_clock.tv_nsec - start_clock.tv_nsec) < 0) { |
| 13 | duration_clock = (end_clock.tv_sec - start_clock.tv_sec - 1) * 1000; |
| 14 | duration_clock += (1000000000 + end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0; |
| 15 | } else { |
| 16 | duration_clock = (end_clock.tv_sec - start_clock.tv_sec) * 1000; |
| 17 | duration_clock += (end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0; |
| 18 | } |
| 19 | return duration_clock; |
| 20 | } |
| 21 | |
| 22 | void SysTimer::startWall() { |
| 23 | if (-1 == clock_gettime(CLOCK_MONOTONIC, &fWall)) { |
| 24 | timespec none = {0, 0}; |
| 25 | fWall = none; |
| 26 | } |
| 27 | } |
| 28 | void SysTimer::startCpu() { |
| 29 | if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &fCpu)) { |
| 30 | timespec none = {0, 0}; |
| 31 | fCpu = none; |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | double SysTimer::endCpu() { |
| 36 | timespec end_cpu; |
| 37 | if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_cpu)) { |
| 38 | timespec none = {0, 0}; |
| 39 | end_cpu = none; |
| 40 | } |
| 41 | return interval_in_ms(fCpu, end_cpu); |
| 42 | } |
| 43 | |
| 44 | double SysTimer::endWall() { |
| 45 | timespec end_wall; |
| 46 | if (-1 == clock_gettime(CLOCK_MONOTONIC, &end_wall)) { |
| 47 | timespec none = {0, 0}; |
| 48 | end_wall = none; |
| 49 | } |
| 50 | return interval_in_ms(fWall, end_wall); |
| 51 | } |