fbfcd56021
This CL is part I of IV (I broke down the 1280 files into 4 CLs). Review URL: https://codereview.appspot.com/6485054 git-svn-id: http://skia.googlecode.com/svn/trunk@5262 2bbb7eff-a529-9590-31e7-b0007b416f81
77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "BenchSysTimer_mach.h"
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//Time
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#include <mach/mach.h>
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#include <mach/mach_time.h>
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static time_value_t macCpuTime() {
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mach_port_t task = mach_task_self();
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if (task == MACH_PORT_NULL) {
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time_value_t none = {0, 0};
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return none;
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}
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task_thread_times_info thread_info_data;
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mach_msg_type_number_t thread_info_count = TASK_THREAD_TIMES_INFO_COUNT;
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if (KERN_SUCCESS != task_info(task,
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TASK_THREAD_TIMES_INFO,
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reinterpret_cast<task_info_t>(&thread_info_data),
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&thread_info_count))
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{
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time_value_t none = {0, 0};
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return none;
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}
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time_value_add(&thread_info_data.user_time, &thread_info_data.system_time)
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return thread_info_data.user_time;
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}
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static double intervalInMSec(const time_value_t start_clock
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, const time_value_t end_clock)
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{
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double duration_clock;
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if ((end_clock.microseconds - start_clock.microseconds) < 0) {
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duration_clock = (end_clock.seconds - start_clock.seconds-1)*1000;
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duration_clock += (1000000
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+ end_clock.microseconds
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- start_clock.microseconds) / 1000.0;
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} else {
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duration_clock = (end_clock.seconds - start_clock.seconds)*1000;
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duration_clock += (end_clock.microseconds - start_clock.microseconds)
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/ 1000.0;
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}
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return duration_clock;
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}
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void BenchSysTimer::startWall() {
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this->fStartWall = mach_absolute_time();
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}
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void BenchSysTimer::startCpu() {
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this->fStartCpu = macCpuTime();
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}
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double BenchSysTimer::endCpu() {
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time_value_t end_cpu = macCpuTime();
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return intervalInMSec(this->fStartCpu, end_cpu);
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}
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double BenchSysTimer::endWall() {
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uint64_t end_wall = mach_absolute_time();
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uint64_t elapsed = end_wall - this->fStartWall;
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mach_timebase_info_data_t sTimebaseInfo;
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if (KERN_SUCCESS != mach_timebase_info(&sTimebaseInfo)) {
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return 0;
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} else {
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uint64_t elapsedNano = elapsed * sTimebaseInfo.numer
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/ sTimebaseInfo.denom;
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return elapsedNano / 1000000;
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}
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}
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