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86 lines (71 loc) · 2.66 KB
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/*
* Copyright (C) 2009, 2011 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 HeapRootVisitor_h
#define HeapRootVisitor_h
#include "SlotVisitor.h"
#include "SlotVisitorInlines.h"
namespace JSC {
// Privileged class for marking JSValues directly. It is only safe to use
// this class to mark direct heap roots that are marked during every GC pass.
// All other references should be wrapped in WriteBarriers.
class HeapRootVisitor {
private:
friend class Heap;
HeapRootVisitor(SlotVisitor&);
public:
void visit(JSValue*);
void visit(JSValue*, size_t);
void visit(JSString**);
void visit(JSCell**);
SlotVisitor& visitor();
private:
SlotVisitor& m_visitor;
};
inline HeapRootVisitor::HeapRootVisitor(SlotVisitor& visitor)
: m_visitor(visitor)
{
}
inline void HeapRootVisitor::visit(JSValue* slot)
{
m_visitor.append(slot);
}
inline void HeapRootVisitor::visit(JSValue* slot, size_t count)
{
m_visitor.append(slot, count);
}
inline void HeapRootVisitor::visit(JSString** slot)
{
m_visitor.append(reinterpret_cast<JSCell**>(slot));
}
inline void HeapRootVisitor::visit(JSCell** slot)
{
m_visitor.append(slot);
}
inline SlotVisitor& HeapRootVisitor::visitor()
{
return m_visitor;
}
} // namespace JSC
#endif // HeapRootVisitor_h