JavaScriptCore-903.tar.gz

[apple/javascriptcore.git] / runtime / CollectorHeapIterator.h

diff --git a/runtime/CollectorHeapIterator.h b/runtime/CollectorHeapIterator.h
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--- a/runtime/CollectorHeapIterator.h
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-/*
- * Copyright (C) 2008, 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. 
- */
-
-#include "config.h"
-#include "Collector.h"
-
-#ifndef CollectorHeapIterator_h
-#define CollectorHeapIterator_h
-
-namespace JSC {
-
-    class CollectorHeapIterator {
-    public:
-        bool operator!=(const CollectorHeapIterator& other);
-        JSCell* operator*() const;
-    
-    protected:
-        CollectorHeapIterator(CollectorHeap&, size_t startBlock, size_t startCell);
-        void advance(size_t max);
-
-        CollectorHeap& m_heap;
-        size_t m_block;
-        size_t m_cell;
-    };
-
-    class LiveObjectIterator : public CollectorHeapIterator {
-    public:
-        LiveObjectIterator(CollectorHeap&, size_t startBlock, size_t startCell = 0);
-        LiveObjectIterator& operator++();
-    };
-
-    class DeadObjectIterator : public CollectorHeapIterator {
-    public:
-        DeadObjectIterator(CollectorHeap&, size_t startBlock, size_t startCell = 0);
-        DeadObjectIterator& operator++();
-    };
-
-    class ObjectIterator : public CollectorHeapIterator {
-    public:
-        ObjectIterator(CollectorHeap&, size_t startBlock, size_t startCell = 0);
-        ObjectIterator& operator++();
-    };
-
-    inline CollectorHeapIterator::CollectorHeapIterator(CollectorHeap& heap, size_t startBlock, size_t startCell)
-        : m_heap(heap)
-        , m_block(startBlock)
-        , m_cell(startCell)
-    {
-    }
-
-    inline bool CollectorHeapIterator::operator!=(const CollectorHeapIterator& other)
-    {
-        return m_block != other.m_block || m_cell != other.m_cell;
-    }
-
-    inline JSCell* CollectorHeapIterator::operator*() const
-    {
-        return reinterpret_cast<JSCell*>(m_heap.blocks[m_block]->cells + m_cell);
-    }
-    
-    // Iterators advance up to the next-to-last -- and not the last -- cell in a
-    // block, since the last cell is a dummy sentinel.
-    inline void CollectorHeapIterator::advance(size_t max)
-    {
-        ++m_cell;
-        if (m_cell == max) {
-            m_cell = 0;
-            ++m_block;
-        }
-    }
-
-    inline LiveObjectIterator::LiveObjectIterator(CollectorHeap& heap, size_t startBlock, size_t startCell)
-        : CollectorHeapIterator(heap, startBlock, startCell - 1)
-    {
-        ++(*this);
-    }
-
-    inline LiveObjectIterator& LiveObjectIterator::operator++()
-    {
-        advance(HeapConstants::cellsPerBlock - 1);
-        if (m_block < m_heap.nextBlock || (m_block == m_heap.nextBlock && m_cell < m_heap.nextCell))
-            return *this;
-
-        while (m_block < m_heap.usedBlocks && !m_heap.blocks[m_block]->marked.get(m_cell))
-            advance(HeapConstants::cellsPerBlock - 1);
-        return *this;
-    }
-
-    inline DeadObjectIterator::DeadObjectIterator(CollectorHeap& heap, size_t startBlock, size_t startCell)
-        : CollectorHeapIterator(heap, startBlock, startCell - 1)
-    {
-        ++(*this);
-    }
-
-    inline DeadObjectIterator& DeadObjectIterator::operator++()
-    {
-        do {
-            advance(HeapConstants::cellsPerBlock - 1);
-            ASSERT(m_block > m_heap.nextBlock || (m_block == m_heap.nextBlock && m_cell >= m_heap.nextCell));
-        } while (m_block < m_heap.usedBlocks && m_heap.blocks[m_block]->marked.get(m_cell));
-        return *this;
-    }
-
-    inline ObjectIterator::ObjectIterator(CollectorHeap& heap, size_t startBlock, size_t startCell)
-        : CollectorHeapIterator(heap, startBlock, startCell - 1)
-    {
-        ++(*this);
-    }
-
-    inline ObjectIterator& ObjectIterator::operator++()
-    {
-        advance(HeapConstants::cellsPerBlock - 1);
-        return *this;
-    }
-
-} // namespace JSC
-
-#endif // CollectorHeapIterator_h