Merge WebKit at r75993: Initial merge by git.

Change-Id: I602bbdc3974787a3b0450456a30a7868286921c3

1 files changed, 109 insertions, 0 deletions

diff --git a/Source/WebKit2/Platform/qt/MappedMemoryPool.h b/Source/WebKit2/Platform/qt/MappedMemoryPool.h
new file mode 100644
index 0000000..8d6af8c
--- /dev/null
+++ b/Source/WebKit2/Platform/qt/MappedMemoryPool.h
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+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2010 University of Szeged
+ *
+ * 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 MappedMemoryPool_h
+#define MappedMemoryPool_h
+
+#include <QFile>
+#include <QObject>
+#include <wtf/StdLibExtras.h>
+#include <wtf/Vector.h>
+
+namespace WebKit {
+
+class MappedMemoryPool;
+
+struct MappedMemory {
+
+    QString mappedFileName() const
+    {
+        ASSERT(file);
+        ASSERT(mappedBytes);
+        return fileName;
+    }
+
+    void markFree()
+    {
+        ASSERT(mappedBytes);
+        dataPtr->isFree = true;
+    }
+
+    uchar* data() const
+    {
+        ASSERT(mappedBytes);
+        return dataPtr->bytes;
+    }
+
+private:
+    friend class MappedMemoryPool;
+
+    MappedMemory()
+        : file(0)
+        , mappedBytes(0)
+        , dataSize(0)
+    {
+    }
+
+    void markUsed() { dataPtr->isFree = false; }
+
+    size_t mapSize() const { return dataSize + sizeof(Data); }
+    bool isFree() const { return dataPtr->isFree; }
+
+    struct Data {
+        uint32_t isFree; // keep bytes aligned
+        uchar bytes[];
+    };
+
+    QFile* file;
+    QString fileName;
+    union {
+        uchar* mappedBytes;
+        Data* dataPtr;
+    };
+    size_t dataSize;
+};
+
+class MappedMemoryPool : QObject {
+    Q_OBJECT
+public:
+    static MappedMemoryPool* instance();
+
+    MappedMemory* mapMemory(size_t size);
+    MappedMemory* mapFile(QString fileName, size_t size);
+
+private:
+    MappedMemoryPool() { }
+    ~MappedMemoryPool();
+
+    static MappedMemoryPool* theInstance;
+
+    Vector<MappedMemory> m_pool;
+};
+
+} // namespace WebKit
+
+#endif // MappedMemoryPool_h