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/*
* Copyright (C) 2021 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. AND ITS CONTRIBUTORS ``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 ITS 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.
*/
#pragma once
#include <algorithm>
#include <wtf/ApproximateTime.h>
#include <wtf/TimeWithDynamicClockType.h>
namespace IPC {
class Timeout {
public:
Timeout(Seconds timeDelta)
: m_deadline(timeDelta.isInfinity() ? ApproximateTime::infinity() : ApproximateTime::now() + timeDelta)
{
}
static constexpr Timeout infinity() { return Timeout { }; }
bool isInfinity() const { return m_deadline.isInfinity(); }
static Timeout now() { return 0_s; }
Seconds secondsUntilDeadline() const { return std::max(m_deadline - ApproximateTime::now(), 0_s ); }
constexpr ApproximateTime deadline() const { return m_deadline; }
bool didTimeOut() const { return ApproximateTime::now() >= m_deadline; }
private:
explicit constexpr Timeout()
: m_deadline(ApproximateTime::infinity())
{
}
ApproximateTime m_deadline;
};
}
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