| /* |
| * 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 { |
| |
| template <HeapType heapType> class CollectorHeapIterator { |
| public: |
| CollectorHeapIterator(CollectorBlock** block, CollectorBlock** endBlock); |
| |
| bool operator!=(const CollectorHeapIterator<heapType>& other) { return m_block != other.m_block || m_cell != other.m_cell; } |
| CollectorHeapIterator<heapType>& operator++(); |
| JSCell* operator*() const; |
| |
| private: |
| typedef typename HeapConstants<heapType>::Block Block; |
| typedef typename HeapConstants<heapType>::Cell Cell; |
| |
| Block** m_block; |
| Block** m_endBlock; |
| Cell* m_cell; |
| Cell* m_endCell; |
| }; |
| |
| template <HeapType heapType> |
| CollectorHeapIterator<heapType>::CollectorHeapIterator(CollectorBlock** block, CollectorBlock** endBlock) |
| : m_block(reinterpret_cast<Block**>(block)) |
| , m_endBlock(reinterpret_cast<Block**>(endBlock)) |
| , m_cell(m_block == m_endBlock ? 0 : (*m_block)->cells) |
| , m_endCell(m_block == m_endBlock ? 0 : (*m_block)->cells + HeapConstants<heapType>::cellsPerBlock) |
| { |
| if (m_cell && m_cell->u.freeCell.zeroIfFree == 0) |
| ++*this; |
| } |
| |
| template <HeapType heapType> |
| CollectorHeapIterator<heapType>& CollectorHeapIterator<heapType>::operator++() |
| { |
| do { |
| for (++m_cell; m_cell != m_endCell; ++m_cell) |
| if (m_cell->u.freeCell.zeroIfFree != 0) { |
| return *this; |
| } |
| |
| if (++m_block != m_endBlock) { |
| m_cell = (*m_block)->cells; |
| m_endCell = (*m_block)->cells + HeapConstants<heapType>::cellsPerBlock; |
| } |
| } while(m_block != m_endBlock); |
| |
| m_cell = 0; |
| return *this; |
| } |
| |
| template <HeapType heapType> |
| JSCell* CollectorHeapIterator<heapType>::operator*() const |
| { |
| return reinterpret_cast<JSCell*>(m_cell); |
| } |
| |
| } // namespace JSC |
| |
| #endif // CollectorHeapIterator_h |