1 /* 2 * Copyright (C) 2009 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 PlatformMessagePortChannel_h 32 #define PlatformMessagePortChannel_h 33 34 #include "WebMessagePortChannelClient.h" 35 36 #include "MessagePortChannel.h" 37 #include <wtf/PassRefPtr.h> 38 #include <wtf/Threading.h> 39 40 namespace WebKit { 41 class WebMessagePortChannel; 42 } 43 44 namespace WebCore { 45 46 class MessagePort; 47 48 // PlatformMessagePortChannel is a platform-dependent interface to the remote side of a message channel. 49 class PlatformMessagePortChannel : public ThreadSafeRefCounted<PlatformMessagePortChannel>, 50 public WebKit::WebMessagePortChannelClient { 51 public: 52 static void createChannel(PassRefPtr<MessagePort>, PassRefPtr<MessagePort>); 53 static PassRefPtr<PlatformMessagePortChannel> create(); 54 static PassRefPtr<PlatformMessagePortChannel> create(WebKit::WebMessagePortChannel*); 55 56 // APIs delegated from MessagePortChannel.h 57 bool entangleIfOpen(MessagePort*); 58 void disentangle(); 59 void postMessageToRemote(PassOwnPtr<MessagePortChannel::EventData>); 60 bool tryGetMessageFromRemote(OwnPtr<MessagePortChannel::EventData>&); 61 void close(); 62 bool isConnectedTo(MessagePort* port); 63 bool hasPendingActivity(); 64 65 // Releases ownership of the contained web channel. 66 WebKit::WebMessagePortChannel* webChannelRelease(); 67 68 ~PlatformMessagePortChannel(); 69 70 private: 71 PlatformMessagePortChannel(); 72 PlatformMessagePortChannel(WebKit::WebMessagePortChannel*); 73 74 void setEntangledChannel(PassRefPtr<PlatformMessagePortChannel>); 75 76 // WebKit::WebMessagePortChannelClient implementation 77 virtual void messageAvailable(); 78 79 // Mutex used to ensure exclusive access to the object internals. 80 Mutex m_mutex; 81 82 // Pointer to our entangled pair - cleared when close() is called. 83 RefPtr<PlatformMessagePortChannel> m_entangledChannel; 84 85 // The port we are connected to - this is the port that is notified when new messages arrive. 86 MessagePort* m_localPort; 87 88 WebKit::WebMessagePortChannel* m_webChannel; 89 }; 90 91 } // namespace WebCore 92 93 #endif // PlatformMessagePortChannel_h 94
