Move Source/WTF/wtf to Source/wtf

Source/WTF/wtf/PageBlock.h

-/*
- * Copyright (C) 2010 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 PageBlock_h
-#define PageBlock_h
-
-namespace WTF {
-
-WTF_EXPORT_PRIVATE size_t pageSize();
-WTF_EXPORT_PRIVATE size_t pageMask();
-inline bool isPageAligned(void* address) { return !(reinterpret_cast<intptr_t>(address) & (pageSize() - 1)); }
-inline bool isPageAligned(size_t size) { return !(size & (pageSize() - 1)); }
-inline bool isPowerOfTwo(size_t size) { return !(size & (size - 1)); }
-
-class PageBlock {
-public:
-    PageBlock();
-    PageBlock(const PageBlock&);
-    PageBlock(void*, size_t, bool hasGuardPages);
-    
-    void* base() const { return m_base; }
-    size_t size() const { return m_size; }
-
-    operator bool() const { return !!m_realBase; }
-
-    bool contains(void* containedBase, size_t containedSize)
-    {
-        return containedBase >= m_base
-            && (static_cast<char*>(containedBase) + containedSize) <= (static_cast<char*>(m_base) + m_size);
-    }
-
-private:
-    void* m_realBase;
-    void* m_base;
-    size_t m_size;
-};
-
-inline PageBlock::PageBlock()
-    : m_realBase(0)
-    , m_base(0)
-    , m_size(0)
-{
-}
-
-inline PageBlock::PageBlock(const PageBlock& other)
-    : m_realBase(other.m_realBase)
-    , m_base(other.m_base)
-    , m_size(other.m_size)
-{
-}
-
-inline PageBlock::PageBlock(void* base, size_t size, bool hasGuardPages)
-    : m_realBase(base)
-    , m_base(static_cast<char*>(base) + ((base && hasGuardPages) ? pageSize() : 0))
-    , m_size(size)
-{
-}
-
-} // namespace WTF
-
-using WTF::pageSize;
-using WTF::isPageAligned;
-using WTF::isPageAligned;
-using WTF::isPowerOfTwo;
-
-#endif // PageBlock_h