/* * Copyright 2011 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "BenchSysTimer_posix.h" //Time #include <time.h> static double intervalInMSec(const timespec start_clock , const timespec end_clock) { double duration_clock; if ((end_clock.tv_nsec - start_clock.tv_nsec) < 0) { duration_clock = (end_clock.tv_sec - start_clock.tv_sec-1)*1000; duration_clock += (1000000000 + end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0; } else { duration_clock = (end_clock.tv_sec - start_clock.tv_sec)*1000; duration_clock += (end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0; } return duration_clock; } void BenchSysTimer::startWall() { if (-1 == clock_gettime(CLOCK_MONOTONIC, &this->fWall)) { timespec none = {0, 0}; this->fWall = none; } } void BenchSysTimer::startCpu() { if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &this->fCpu)) { timespec none = {0, 0}; this->fCpu = none; } } double BenchSysTimer::endCpu() { timespec end_cpu; if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_cpu)) { timespec none = {0, 0}; end_cpu = none; } return intervalInMSec(this->fCpu, end_cpu); } double BenchSysTimer::endWall() { timespec end_wall; if (-1 == clock_gettime(CLOCK_MONOTONIC, &end_wall)) { timespec none = {0, 0}; end_wall = none; } return intervalInMSec(this->fWall, end_wall); }