1// Copyright (c) 2012 The Chromium 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#include "base/profiler/tracked_time.h"
6
7#include "build/build_config.h"
8
9#if defined(OS_WIN)
10#include <mmsystem.h>  // Declare timeGetTime()... after including build_config.
11#endif
12
13namespace tracked_objects {
14
15Duration::Duration() : ms_(0) {}
16Duration::Duration(int32 duration) : ms_(duration) {}
17
18Duration& Duration::operator+=(const Duration& other) {
19  ms_ += other.ms_;
20  return *this;
21}
22
23Duration Duration::operator+(const Duration& other) const {
24  return Duration(ms_ + other.ms_);
25}
26
27bool Duration::operator==(const Duration& other) const {
28  return ms_ == other.ms_;
29}
30
31bool Duration::operator!=(const Duration& other) const {
32  return ms_ != other.ms_;
33}
34
35bool Duration::operator>(const Duration& other) const {
36  return ms_ > other.ms_;
37}
38
39// static
40Duration Duration::FromMilliseconds(int ms) { return Duration(ms); }
41
42int32 Duration::InMilliseconds() const { return ms_; }
43
44//------------------------------------------------------------------------------
45
46TrackedTime::TrackedTime() : ms_(0) {}
47TrackedTime::TrackedTime(int32 ms) : ms_(ms) {}
48TrackedTime::TrackedTime(const base::TimeTicks& time)
49    : ms_((time - base::TimeTicks()).InMilliseconds()) {
50}
51
52// static
53TrackedTime TrackedTime::Now() {
54#if defined(OS_WIN)
55  // Use lock-free accessor to 32 bit time.
56  // Note that TimeTicks::Now() is built on this, so we have "compatible"
57  // times when we down-convert a TimeTicks sample.
58  return TrackedTime(base::TimeTicks::UnprotectedNow());
59#else
60  // Posix has nice cheap 64 bit times, so we just down-convert it.
61  return TrackedTime(base::TimeTicks::Now());
62#endif  // OS_WIN
63}
64
65Duration TrackedTime::operator-(const TrackedTime& other) const {
66  return Duration(ms_ - other.ms_);
67}
68
69TrackedTime TrackedTime::operator+(const Duration& other) const {
70  return TrackedTime(ms_ + other.ms_);
71}
72
73bool TrackedTime::is_null() const { return ms_ == 0; }
74
75}  // namespace tracked_objects
76