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/*
* Copyright (C) 2009 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 ConservativeSet_h
#define ConservativeSet_h
#include "Heap.h"
#include "MarkStack.h"
#include <wtf/Vector.h>
namespace JSC {
class JSCell;
class ConservativeSet {
public:
ConservativeSet(Heap*);
~ConservativeSet();
void add(void* begin, void* end);
void mark(MarkStack&);
private:
static const size_t inlineCapacity = 128;
static const size_t nonInlineCapacity = 8192 / sizeof(JSCell*);
void grow();
Heap* m_heap;
DeprecatedPtr<JSCell>* m_set;
size_t m_size;
size_t m_capacity;
DeprecatedPtr<JSCell> m_inlineSet[inlineCapacity];
};
inline ConservativeSet::ConservativeSet(Heap* heap)
: m_heap(heap)
, m_set(m_inlineSet)
, m_size(0)
, m_capacity(inlineCapacity)
{
}
inline ConservativeSet::~ConservativeSet()
{
if (m_set != m_inlineSet)
OSAllocator::decommitAndRelease(m_set, m_capacity * sizeof(DeprecatedPtr<JSCell>*));
}
inline void ConservativeSet::mark(MarkStack& markStack)
{
for (size_t i = 0; i < m_size; ++i)
markStack.append(&m_set[i]);
}
} // namespace JSC
#endif // ConservativeSet_h
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