mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
/*
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* Copyright (C) 2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "ConstraintConcurrency.h"
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#include "ConstraintParallelism.h"
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#include "ConstraintVolatility.h"
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#include <limits.h>
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#include <wtf/FastMalloc.h>
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#include <wtf/Lock.h>
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#include <wtf/Noncopyable.h>
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#include <wtf/SharedTask.h>
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#include <wtf/text/CString.h>
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namespace JSC {
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class MarkingConstraintSet;
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class SlotVisitor;
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class MarkingConstraint {
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WTF_MAKE_NONCOPYABLE(MarkingConstraint);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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JS_EXPORT_PRIVATE MarkingConstraint(
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CString abbreviatedName, CString name, ConstraintVolatility,
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ConstraintConcurrency = ConstraintConcurrency::Concurrent,
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ConstraintParallelism = ConstraintParallelism::Sequential);
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JS_EXPORT_PRIVATE virtual ~MarkingConstraint();
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unsigned index() const { return m_index; }
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const char* abbreviatedName() const { return m_abbreviatedName.data(); }
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const char* name() const { return m_name.data(); }
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void resetStats();
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size_t lastVisitCount() const { return m_lastVisitCount; }
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void execute(SlotVisitor&);
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JS_EXPORT_PRIVATE virtual double quickWorkEstimate(SlotVisitor& visitor);
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double workEstimate(SlotVisitor& visitor);
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void prepareToExecute(const AbstractLocker& constraintSolvingLocker, SlotVisitor&);
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void doParallelWork(SlotVisitor&, SharedTask<void(SlotVisitor&)>&);
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ConstraintVolatility volatility() const { return m_volatility; }
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ConstraintConcurrency concurrency() const { return m_concurrency; }
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ConstraintParallelism parallelism() const { return m_parallelism; }
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protected:
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virtual void executeImpl(SlotVisitor&) = 0;
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JS_EXPORT_PRIVATE virtual void prepareToExecuteImpl(const AbstractLocker& constraintSolvingLocker, SlotVisitor&);
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private:
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friend class MarkingConstraintSet; // So it can set m_index.
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CString m_abbreviatedName;
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CString m_name;
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size_t m_lastVisitCount { 0 };
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unsigned m_index { UINT_MAX };
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ConstraintVolatility m_volatility;
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ConstraintConcurrency m_concurrency;
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ConstraintParallelism m_parallelism;
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Lock m_lock;
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};
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} // namespace JSC
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