/* * Copyright (C) 2017 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 "SlotVisitor.h" #include <wtf/MonotonicTime.h> namespace JSC { class VisitingTimeout { public: VisitingTimeout() { } VisitingTimeout(SlotVisitor& visitor, bool didVisitSomething, MonotonicTime timeout) : m_didVisitSomething(didVisitSomething) , m_visitCountBefore(visitor.visitCount()) , m_timeout(timeout) { } size_t visitCount(SlotVisitor& visitor) const { return visitor.visitCount() - m_visitCountBefore; } bool didVisitSomething(SlotVisitor& visitor) const { return m_didVisitSomething || visitCount(visitor); } bool shouldTimeOut(SlotVisitor& visitor) const { return didVisitSomething(visitor) && hasElapsed(m_timeout); } private: bool m_didVisitSomething { false }; size_t m_visitCountBefore { 0 }; MonotonicTime m_timeout; }; } // namespace JSC