third_party/WebKit/public/web/WebArrayBuffer.h

/*
 * Copyright (C) 2011 Google 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */

#ifndef WebArrayBuffer_h
#define WebArrayBuffer_h

#include "../platform/WebCommon.h"
#include "../platform/WebPrivatePtr.h"

#if INSIDE_BLINK
namespace WTF { template <typename T> class PassRefPtr; }
#endif

namespace blink {

class DOMArrayBuffer;

class WebArrayBuffer {
public:
    ~WebArrayBuffer() { reset(); }

    WebArrayBuffer() { }
    WebArrayBuffer(const WebArrayBuffer& b) { assign(b); }
    WebArrayBuffer& operator=(const WebArrayBuffer& b)
    {
        assign(b);
        return *this;
    }

    BLINK_EXPORT static WebArrayBuffer create(unsigned numElements, unsigned elementByteSize);

    BLINK_EXPORT void reset();
    BLINK_EXPORT void assign(const WebArrayBuffer&);

    bool isNull() const { return m_private.isNull(); }
    BLINK_EXPORT void* data() const;
    BLINK_EXPORT unsigned byteLength() const;

#if INSIDE_BLINK
    BLINK_EXPORT WebArrayBuffer(const WTF::PassRefPtr<DOMArrayBuffer>&);
    BLINK_EXPORT WebArrayBuffer& operator=(const WTF::PassRefPtr<DOMArrayBuffer>&);
    BLINK_EXPORT operator WTF::PassRefPtr<DOMArrayBuffer>() const;
#endif

protected:
    WebPrivatePtr<DOMArrayBuffer> m_private;
};

} // namespace blink

#endif // WebArrayBuffer_h