1/* 2 * Copyright (C) 2013 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "WriteBarrierBuffer.h" 28 29#include "GCAssertions.h" 30#include "Heap.h" 31#include "JSCell.h" 32#include "JSCInlines.h" 33#include "Structure.h" 34 35namespace JSC { 36 37WriteBarrierBuffer::WriteBarrierBuffer(unsigned capacity) 38 : m_currentIndex(0) 39 , m_capacity(capacity) 40 , m_buffer(static_cast<JSCell**>(fastMalloc(sizeof(JSCell*) * capacity))) 41{ 42} 43 44WriteBarrierBuffer::~WriteBarrierBuffer() 45{ 46 fastFree(m_buffer); 47 m_buffer = 0; 48} 49 50void WriteBarrierBuffer::flush(Heap& heap) 51{ 52 ASSERT(m_currentIndex <= m_capacity); 53 for (size_t i = 0; i < m_currentIndex; ++i) 54 heap.writeBarrier(m_buffer[i]); 55 m_currentIndex = 0; 56} 57 58void WriteBarrierBuffer::reset() 59{ 60 m_currentIndex = 0; 61} 62 63void WriteBarrierBuffer::add(JSCell* cell) 64{ 65 ASSERT_GC_OBJECT_LOOKS_VALID(cell); 66 ASSERT(m_currentIndex < m_capacity); 67 m_buffer[m_currentIndex++] = cell; 68} 69 70} // namespace JSC 71