third_party/WebKit/public/platform/WebThreadSafeData.h

   1 /*
   2  * Copyright (C) 2010 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 WebThreadSafeData_h
  32 #define WebThreadSafeData_h
  33
  34 #include "WebCommon.h"
  35 #include "WebPrivatePtr.h"
  36
  37 #if !INSIDE_BLINK
  38 #include <string>
  39 #endif
  40
  41 namespace blink {
  42
  43 class RawData;
  44
  45 // A container for raw bytes. It is inexpensive to copy a WebThreadSafeData object.
  46 // It is safe to pass a WebThreadSafeData across threads!!!
  47 class WebThreadSafeData {
  48 public:
  49     WebThreadSafeData() { }
  50     BLINK_PLATFORM_EXPORT WebThreadSafeData(const char* data, size_t length);
  51
  52     ~WebThreadSafeData() { reset(); }
  53
  54     BLINK_PLATFORM_EXPORT void assign(const WebThreadSafeData&);
  55     BLINK_PLATFORM_EXPORT void reset();
  56
  57     BLINK_PLATFORM_EXPORT size_t size() const;
  58     BLINK_PLATFORM_EXPORT const char* data() const;
  59
  60     bool isEmpty() const { return !size(); }
  61
  62     BLINK_PLATFORM_EXPORT WebThreadSafeData(const WebThreadSafeData&);
  63     BLINK_PLATFORM_EXPORT WebThreadSafeData& operator=(const WebThreadSafeData&);
  64
  65 #if INSIDE_BLINK
  66     BLINK_PLATFORM_EXPORT WebThreadSafeData(const WTF::PassRefPtr<RawData>&);
  67     BLINK_PLATFORM_EXPORT WebThreadSafeData& operator=(const WTF::PassRefPtr<RawData>&);
  68 #else
  69     operator std::string() const
  70     {
  71         size_t len = size();
  72         return len ? std::string(data(), len) : std::string();
  73     }
  74 #endif
  75
  76 private:
  77     WebPrivatePtr<RawData> m_private;
  78 };
  79
  80 } // namespace blink
  81
  82 #endif