third_party/WebKit/Source/core/dom/MessageChannel.cpp

   1 /*
   2  * Copyright (C) 2008 Apple 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
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  */
  26
  27 #include "config.h"
  28 #include "core/dom/MessageChannel.h"
  29
  30 #include "core/dom/MessagePort.h"
  31 #include "public/platform/Platform.h"
  32 #include "public/platform/WebMessagePortChannel.h"
  33
  34 namespace blink {
  35
  36 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MessageChannel);
  37
  38 static void createChannel(MessagePort* port1, MessagePort* port2)
  39 {
  40     WebMessagePortChannel* channel1;
  41     WebMessagePortChannel* channel2;
  42     Platform::current()->createMessageChannel(&channel1, &channel2);
  43     ASSERT(channel1 && channel2);
  44
  45     // Now entangle the proxies with the appropriate local ports.
  46     port1->entangle(adoptPtr(channel2));
  47     port2->entangle(adoptPtr(channel1));
  48 }
  49
  50 MessageChannel::MessageChannel(ExecutionContext* context)
  51     : m_port1(MessagePort::create(*context))
  52     , m_port2(MessagePort::create(*context))
  53 {
  54     createChannel(m_port1.get(), m_port2.get());
  55 }
  56
  57 DEFINE_TRACE(MessageChannel)
  58 {
  59     visitor->trace(m_port1);
  60     visitor->trace(m_port2);
  61 }
  62
  63 } // namespace blink