1 | /* |
2 | * Copyright (C) 2016 Apple Inc. All rights reserved. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions |
6 | * are met: |
7 | * 1. Redistributions of source code must retain the above copyright |
8 | * notice, this list of conditions and the following disclaimer. |
9 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * notice, this list of conditions and the following disclaimer in the |
11 | * documentation and/or other materials provided with the distribution. |
12 | * |
13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 | */ |
25 | |
26 | #pragma once |
27 | |
28 | #include <wtf/ClockType.h> |
29 | #include <wtf/MonotonicTime.h> |
30 | #include <wtf/WallTime.h> |
31 | |
32 | namespace WTF { |
33 | |
34 | class PrintStream; |
35 | |
36 | class TimeWithDynamicClockType { |
37 | public: |
38 | TimeWithDynamicClockType() { } |
39 | |
40 | TimeWithDynamicClockType(WallTime time) |
41 | : m_value(time.secondsSinceEpoch().value()) |
42 | , m_type(ClockType::Wall) |
43 | { |
44 | } |
45 | |
46 | TimeWithDynamicClockType(MonotonicTime time) |
47 | : m_value(time.secondsSinceEpoch().value()) |
48 | , m_type(ClockType::Monotonic) |
49 | { |
50 | } |
51 | |
52 | static TimeWithDynamicClockType fromRawSeconds(double value, ClockType type) |
53 | { |
54 | TimeWithDynamicClockType result; |
55 | result.m_value = value; |
56 | result.m_type = type; |
57 | return result; |
58 | } |
59 | |
60 | Seconds secondsSinceEpoch() const { return Seconds(m_value); } |
61 | ClockType clockType() const { return m_type; } |
62 | |
63 | WTF_EXPORT_PRIVATE static TimeWithDynamicClockType now(ClockType); |
64 | |
65 | WTF_EXPORT_PRIVATE TimeWithDynamicClockType nowWithSameClock() const; |
66 | |
67 | TimeWithDynamicClockType withSameClockAndRawSeconds(double value) const |
68 | { |
69 | return TimeWithDynamicClockType::fromRawSeconds(value, clockType()); |
70 | } |
71 | |
72 | // Asserts that the time is of the type you want. |
73 | WTF_EXPORT_PRIVATE WallTime wallTime() const; |
74 | WTF_EXPORT_PRIVATE MonotonicTime monotonicTime() const; |
75 | |
76 | WTF_EXPORT_PRIVATE WallTime approximateWallTime() const; |
77 | WTF_EXPORT_PRIVATE MonotonicTime approximateMonotonicTime() const; |
78 | |
79 | explicit operator bool() const { return !!m_value; } |
80 | |
81 | TimeWithDynamicClockType operator+(Seconds other) const |
82 | { |
83 | return withSameClockAndRawSeconds(m_value + other.value()); |
84 | } |
85 | |
86 | TimeWithDynamicClockType operator-(Seconds other) const |
87 | { |
88 | return withSameClockAndRawSeconds(m_value - other.value()); |
89 | } |
90 | |
91 | // Time is a scalar and scalars can be negated as this could arise from algebraic |
92 | // transformations. So, we allow it. |
93 | TimeWithDynamicClockType operator-() const |
94 | { |
95 | return withSameClockAndRawSeconds(-m_value); |
96 | } |
97 | |
98 | TimeWithDynamicClockType operator+=(Seconds other) |
99 | { |
100 | return *this = *this + other; |
101 | } |
102 | |
103 | TimeWithDynamicClockType operator-=(Seconds other) |
104 | { |
105 | return *this = *this - other; |
106 | } |
107 | |
108 | WTF_EXPORT_PRIVATE Seconds operator-(const TimeWithDynamicClockType&) const; |
109 | |
110 | bool operator==(const TimeWithDynamicClockType& other) const |
111 | { |
112 | return m_value == other.m_value |
113 | && m_type == other.m_type; |
114 | } |
115 | |
116 | bool operator!=(const TimeWithDynamicClockType& other) const |
117 | { |
118 | return !(*this == other); |
119 | } |
120 | |
121 | // To do relative comparisons, you must be using times with the same clock type. |
122 | WTF_EXPORT_PRIVATE bool operator<(const TimeWithDynamicClockType&) const; |
123 | WTF_EXPORT_PRIVATE bool operator>(const TimeWithDynamicClockType&) const; |
124 | WTF_EXPORT_PRIVATE bool operator<=(const TimeWithDynamicClockType&) const; |
125 | WTF_EXPORT_PRIVATE bool operator>=(const TimeWithDynamicClockType&) const; |
126 | |
127 | WTF_EXPORT_PRIVATE void dump(PrintStream&) const; |
128 | |
129 | private: |
130 | double m_value { 0 }; |
131 | ClockType m_type { ClockType::Wall }; |
132 | }; |
133 | |
134 | WTF_EXPORT_PRIVATE void sleep(const TimeWithDynamicClockType&); |
135 | |
136 | WTF_EXPORT_PRIVATE bool hasElapsed(const TimeWithDynamicClockType&); |
137 | |
138 | } // namespace WTF |
139 | |
140 | namespace std { |
141 | |
142 | inline bool isnan(WTF::TimeWithDynamicClockType time) |
143 | { |
144 | return std::isnan(time.secondsSinceEpoch().value()); |
145 | } |
146 | |
147 | inline bool isinf(WTF::TimeWithDynamicClockType time) |
148 | { |
149 | return std::isinf(time.secondsSinceEpoch().value()); |
150 | } |
151 | |
152 | inline bool isfinite(WTF::TimeWithDynamicClockType time) |
153 | { |
154 | return std::isfinite(time.secondsSinceEpoch().value()); |
155 | } |
156 | |
157 | } // namespace std |
158 | |
159 | using WTF::TimeWithDynamicClockType; |
160 | using WTF::hasElapsed; |
161 | using WTF::sleep; |
162 | |