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Side by Side Diff: tools/timer/SysTimer_mach.cpp

Issue 1417753003: Revert of SkTime::GetNSecs() (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 5 years, 2 months ago
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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_mach.h"
8
9 static time_value_t mac_cpu_time() {
10 mach_port_t task = mach_task_self();
11 if (task == MACH_PORT_NULL) {
12 time_value_t none = {0, 0};
13 return none;
14 }
15
16 task_thread_times_info thread_info_data;
17 mach_msg_type_number_t thread_info_count = TASK_THREAD_TIMES_INFO_COUNT;
18 if (KERN_SUCCESS != task_info(task,
19 TASK_THREAD_TIMES_INFO,
20 reinterpret_cast<task_info_t>(&thread_info_dat a),
21 &thread_info_count)) {
22 time_value_t none = {0, 0};
23 return none;
24 }
25
26 time_value_add(&thread_info_data.user_time, &thread_info_data.system_time)
27 return thread_info_data.user_time;
28 }
29
30 static double interval_in_ms(time_value_t start_clock, time_value_t end_clock) {
31 double duration_clock;
32 if ((end_clock.microseconds - start_clock.microseconds) < 0) {
33 duration_clock = (end_clock.seconds - start_clock.seconds-1) * 1000;
34 duration_clock += (1000000 + end_clock.microseconds - start_clock.micros econds) / 1000.0;
35 } else {
36 duration_clock = (end_clock.seconds - start_clock.seconds) * 1000;
37 duration_clock += (end_clock.microseconds - start_clock.microseconds) / 1000.0;
38 }
39 return duration_clock;
40 }
41
42 void SysTimer::startWall() {
43 fStartWall = mach_absolute_time();
44 }
45
46 void SysTimer::startCpu() {
47 fStartCpu = mac_cpu_time();
48 }
49
50 double SysTimer::endCpu() {
51 time_value_t end_cpu = mac_cpu_time();
52 return interval_in_ms(fStartCpu, end_cpu);
53 }
54
55 double SysTimer::endWall() {
56 uint64_t end_wall = mach_absolute_time();
57
58 uint64_t elapsed = end_wall - fStartWall;
59 mach_timebase_info_data_t sTimebaseInfo;
60 if (KERN_SUCCESS != mach_timebase_info(&sTimebaseInfo)) {
61 return 0;
62 } else {
63 uint64_t elapsedNano = elapsed * sTimebaseInfo.numer / sTimebaseInfo.den om;
64 return elapsedNano / 1000000.0;
65 }
66 }
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