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/*
* Copyright (C) 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef WTF_TimeWithDynamicClockType_h
#define WTF_TimeWithDynamicClockType_h
#include <wtf/ClockType.h>
#include <wtf/MonotonicTime.h>
#include <wtf/WallTime.h>
namespace WTF {
class PrintStream;
class TimeWithDynamicClockType {
public:
TimeWithDynamicClockType() { }
TimeWithDynamicClockType(WallTime time)
: m_value(time.secondsSinceEpoch().value())
, m_type(ClockType::Wall)
{
}
TimeWithDynamicClockType(MonotonicTime time)
: m_value(time.secondsSinceEpoch().value())
, m_type(ClockType::Monotonic)
{
}
static TimeWithDynamicClockType fromRawSeconds(double value, ClockType type)
{
TimeWithDynamicClockType result;
result.m_value = value;
result.m_type = type;
return result;
}
Seconds secondsSinceEpoch() const { return Seconds(m_value); }
ClockType clockType() const { return m_type; }
WTF_EXPORT_PRIVATE static TimeWithDynamicClockType now(ClockType);
WTF_EXPORT_PRIVATE TimeWithDynamicClockType nowWithSameClock() const;
TimeWithDynamicClockType withSameClockAndRawSeconds(double value) const
{
return TimeWithDynamicClockType::fromRawSeconds(value, clockType());
}
// Asserts that the time is of the type you want.
WTF_EXPORT_PRIVATE WallTime wallTime() const;
WTF_EXPORT_PRIVATE MonotonicTime monotonicTime() const;
WTF_EXPORT_PRIVATE WallTime approximateWallTime() const;
WTF_EXPORT_PRIVATE MonotonicTime approximateMonotonicTime() const;
explicit operator bool() const { return !!m_value; }
TimeWithDynamicClockType operator+(Seconds other) const
{
return withSameClockAndRawSeconds(m_value + other.value());
}
TimeWithDynamicClockType operator-(Seconds other) const
{
return withSameClockAndRawSeconds(m_value - other.value());
}
// Time is a scalar and scalars can be negated as this could arise from algebraic
// transformations. So, we allow it.
TimeWithDynamicClockType operator-() const
{
return withSameClockAndRawSeconds(-m_value);
}
TimeWithDynamicClockType operator+=(Seconds other)
{
return *this = *this + other;
}
TimeWithDynamicClockType operator-=(Seconds other)
{
return *this = *this - other;
}
WTF_EXPORT_PRIVATE Seconds operator-(const TimeWithDynamicClockType&) const;
bool operator==(const TimeWithDynamicClockType& other) const
{
return m_value == other.m_value
&& m_type == other.m_type;
}
bool operator!=(const TimeWithDynamicClockType& other) const
{
return !(*this == other);
}
// To do relative comparisons, you must be using times with the same clock type.
WTF_EXPORT_PRIVATE bool operator<(const TimeWithDynamicClockType&) const;
WTF_EXPORT_PRIVATE bool operator>(const TimeWithDynamicClockType&) const;
WTF_EXPORT_PRIVATE bool operator<=(const TimeWithDynamicClockType&) const;
WTF_EXPORT_PRIVATE bool operator>=(const TimeWithDynamicClockType&) const;
WTF_EXPORT_PRIVATE void dump(PrintStream&) const;
private:
double m_value { 0 };
ClockType m_type { ClockType::Wall };
};
WTF_EXPORT_PRIVATE void sleep(const TimeWithDynamicClockType&);
WTF_EXPORT_PRIVATE bool hasElapsed(const TimeWithDynamicClockType&);
} // namespace WTF
using WTF::TimeWithDynamicClockType;
using WTF::hasElapsed;
using WTF::sleep;
#endif // WTF_TimeWithDynamicClockType_h
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