third_party/WebKit/public/web/WebArrayBuffer.h

   1 /*
   2  * Copyright (C) 2011 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #ifndef WebArrayBuffer_h
  32 #define WebArrayBuffer_h
  33
  34 #include "../platform/WebCommon.h"
  35 #include "../platform/WebPrivatePtr.h"
  36
  37 #if INSIDE_BLINK
  38 namespace WTF { template <typename T> class PassRefPtr; }
  39 #endif
  40
  41 namespace blink {
  42
  43 class DOMArrayBuffer;
  44
  45 class WebArrayBuffer {
  46 public:
  47     ~WebArrayBuffer() { reset(); }
  48
  49     WebArrayBuffer() { }
  50     WebArrayBuffer(const WebArrayBuffer& b) { assign(b); }
  51     WebArrayBuffer& operator=(const WebArrayBuffer& b)
  52     {
  53         assign(b);
  54         return *this;
  55     }
  56
  57     BLINK_EXPORT static WebArrayBuffer create(unsigned numElements, unsigned elementByteSize);
  58
  59     BLINK_EXPORT void reset();
  60     BLINK_EXPORT void assign(const WebArrayBuffer&);
  61
  62     bool isNull() const { return m_private.isNull(); }
  63     BLINK_EXPORT void* data() const;
  64     BLINK_EXPORT unsigned byteLength() const;
  65
  66 #if INSIDE_BLINK
  67     BLINK_EXPORT WebArrayBuffer(const WTF::PassRefPtr<DOMArrayBuffer>&);
  68     BLINK_EXPORT WebArrayBuffer& operator=(const WTF::PassRefPtr<DOMArrayBuffer>&);
  69     BLINK_EXPORT operator WTF::PassRefPtr<DOMArrayBuffer>() const;
  70 #endif
  71
  72 protected:
  73     WebPrivatePtr<DOMArrayBuffer> m_private;
  74 };
  75
  76 } // namespace blink
  77
  78 #endif // WebArrayBuffer_h