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#include "config.h"
27#include <wtf/TimeWithDynamicClockType.h>
28
29#include <cfloat>
30#include <cmath>
31#include <wtf/Condition.h>
32#include <wtf/DataLog.h>
33#include <wtf/PrintStream.h>
34#include <wtf/Lock.h>
35
36namespace WTF {
37
38TimeWithDynamicClockType TimeWithDynamicClockType::now(ClockType type)
39{
40 switch (type) {
41 case ClockType::Wall:
42 return WallTime::now();
43 case ClockType::Monotonic:
44 return MonotonicTime::now();
45 }
46 RELEASE_ASSERT_NOT_REACHED();
47 return TimeWithDynamicClockType();
48}
49
50TimeWithDynamicClockType TimeWithDynamicClockType::nowWithSameClock() const
51{
52 return now(clockType());
53}
54
55WallTime TimeWithDynamicClockType::wallTime() const
56{
57 RELEASE_ASSERT(m_type == ClockType::Wall);
58 return WallTime::fromRawSeconds(m_value);
59}
60
61MonotonicTime TimeWithDynamicClockType::monotonicTime() const
62{
63 RELEASE_ASSERT(m_type == ClockType::Monotonic);
64 return MonotonicTime::fromRawSeconds(m_value);
65}
66
67WallTime TimeWithDynamicClockType::approximateWallTime() const
68{
69 switch (m_type) {
70 case ClockType::Wall:
71 return wallTime();
72 case ClockType::Monotonic:
73 return monotonicTime().approximateWallTime();
74 }
75 RELEASE_ASSERT_NOT_REACHED();
76 return WallTime();
77}
78
79MonotonicTime TimeWithDynamicClockType::approximateMonotonicTime() const
80{
81 switch (m_type) {
82 case ClockType::Wall:
83 return wallTime().approximateMonotonicTime();
84 case ClockType::Monotonic:
85 return monotonicTime();
86 }
87 RELEASE_ASSERT_NOT_REACHED();
88 return MonotonicTime();
89}
90
91Seconds TimeWithDynamicClockType::operator-(const TimeWithDynamicClockType& other) const
92{
93 RELEASE_ASSERT(m_type == other.m_type);
94 return Seconds(m_value - other.m_value);
95}
96
97bool TimeWithDynamicClockType::operator<(const TimeWithDynamicClockType& other) const
98{
99 RELEASE_ASSERT(m_type == other.m_type);
100 return m_value < other.m_value;
101}
102
103bool TimeWithDynamicClockType::operator>(const TimeWithDynamicClockType& other) const
104{
105 RELEASE_ASSERT(m_type == other.m_type);
106 return m_value > other.m_value;
107}
108
109bool TimeWithDynamicClockType::operator<=(const TimeWithDynamicClockType& other) const
110{
111 RELEASE_ASSERT(m_type == other.m_type);
112 return m_value <= other.m_value;
113}
114
115bool TimeWithDynamicClockType::operator>=(const TimeWithDynamicClockType& other) const
116{
117 RELEASE_ASSERT(m_type == other.m_type);
118 return m_value >= other.m_value;
119}
120
121void TimeWithDynamicClockType::dump(PrintStream& out) const
122{
123 out.print(m_type, "(", m_value, " sec)");
124}
125
126void sleep(const TimeWithDynamicClockType& time)
127{
128 Lock fakeLock;
129 Condition fakeCondition;
130 LockHolder fakeLocker(fakeLock);
131 fakeCondition.waitUntil(fakeLock, time);
132}
133
134bool hasElapsed(const TimeWithDynamicClockType& time)
135{
136 // Avoid doing now().
137 if (!(time > time.withSameClockAndRawSeconds(0)))
138 return true;
139 if (std::isinf(time.secondsSinceEpoch().value()))
140 return false;
141
142 return time <= time.nowWithSameClock();
143}
144
145} // namespace WTF
146
147
148