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/*
* Copyright (C) 2014 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 DFGSafepoint_h
#define DFGSafepoint_h
#if ENABLE(DFG_JIT)
#include <wtf/Vector.h>
namespace JSC {
class SlotVisitor;
class VM;
namespace DFG {
class Scannable;
struct Plan;
class Safepoint {
public:
class Result {
public:
Result()
: m_didGetCancelled(false)
, m_wasChecked(true)
{
}
~Result();
bool didGetCancelled();
private:
friend class Safepoint;
bool m_didGetCancelled;
bool m_wasChecked;
};
Safepoint(Plan&, Result&);
~Safepoint();
void add(Scannable*);
void begin();
void checkLivenessAndVisitChildren(SlotVisitor&);
bool isKnownToBeLiveDuringGC();
void cancel();
VM& vm() const;
private:
Plan& m_plan;
Vector<Scannable*> m_scannables;
bool m_didCallBegin;
Result& m_result;
};
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
#endif // DFGSafepoint_h
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