X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/1df5f87f1309a8daa30dabdee855f48ae40d14ab..6fe7ccc865dc7d7541b93c5bcaf6368d2c98a174:/wtf/BlockStack.h?ds=inline diff --git a/wtf/BlockStack.h b/wtf/BlockStack.h deleted file mode 100644 index a4d7425..0000000 --- a/wtf/BlockStack.h +++ /dev/null @@ -1,95 +0,0 @@ -/* - * Copyright (C) 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. AND ITS CONTRIBUTORS ``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 ITS 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 BlockStack_h -#define BlockStack_h - -#include -#include - -namespace WTF { - -template class BlockStack { -public: - static const size_t blockSize = 4096; - static const size_t blockLength = blockSize / sizeof(T); - - BlockStack(); - ~BlockStack(); - - T* grow(); - void shrink(T*); - - const Vector& blocks(); - -private: - Vector m_blocks; - T* m_spareBlock; // Used to avoid thrash at block boundaries. -}; - -template BlockStack::BlockStack() - : m_spareBlock(0) -{ -} - -template BlockStack::~BlockStack() -{ - if (m_spareBlock) - free(m_spareBlock); - for (size_t i = 0; i < m_blocks.size(); ++i) - free(m_blocks[i]); -} - -template inline const Vector& BlockStack::blocks() -{ - return m_blocks; -} - -template T* BlockStack::grow() -{ - T* block = m_spareBlock ? m_spareBlock : static_cast(malloc(blockSize)); - m_spareBlock = 0; - - m_blocks.append(block); - return block; -} - -template void BlockStack::shrink(T* newEnd) -{ - ASSERT(newEnd != m_blocks.last() + blockLength); - m_spareBlock = m_blocks.last(); - m_blocks.removeLast(); - - while (m_blocks.last() + blockLength != newEnd) { - free(m_blocks.last()); - m_blocks.removeLast(); - } -} - -} - -using WTF::BlockStack; - -#endif