Source/WebKit/Shared/SharedStringHashTableReadOnly.h

/*
 * Copyright (C) 2010-2017 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
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 */

#pragma once

#include <WebCore/SharedStringHash.h>
#include <wtf/RefPtr.h>

namespace WebKit {

class SharedMemory;

class SharedStringHashTableReadOnly {
public:
    SharedStringHashTableReadOnly();
    ~SharedStringHashTableReadOnly();

    bool contains(WebCore::SharedStringHash) const;

    SharedMemory* sharedMemory() const { return m_sharedMemory.get(); }
    void setSharedMemory(RefPtr<SharedMemory>&&);

protected:
    WebCore::SharedStringHash* findSlot(WebCore::SharedStringHash) const;

    RefPtr<SharedMemory> m_sharedMemory;
    unsigned m_tableSize { 0 };
    unsigned m_tableSizeMask { 0 };
    WebCore::SharedStringHash* m_table { nullptr };
};

} // namespace WebKit