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/*
* Copyright (C) 2009 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,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef PlatformMessagePortChannel_h
#define PlatformMessagePortChannel_h
#include "WebMessagePortChannelClient.h"
#include "MessagePortChannel.h"
#include <wtf/PassRefPtr.h>
#include <wtf/Threading.h>
namespace WebKit {
class WebMessagePortChannel;
}
namespace WebCore {
class MessagePort;
// PlatformMessagePortChannel is a platform-dependent interface to the remote side of a message channel.
class PlatformMessagePortChannel : public ThreadSafeRefCounted<PlatformMessagePortChannel>,
public WebKit::WebMessagePortChannelClient {
public:
static void createChannel(PassRefPtr<MessagePort>, PassRefPtr<MessagePort>);
static PassRefPtr<PlatformMessagePortChannel> create();
static PassRefPtr<PlatformMessagePortChannel> create(WebKit::WebMessagePortChannel*);
// APIs delegated from MessagePortChannel.h
bool entangleIfOpen(MessagePort*);
void disentangle();
void postMessageToRemote(PassOwnPtr<MessagePortChannel::EventData>);
bool tryGetMessageFromRemote(OwnPtr<MessagePortChannel::EventData>&);
void close();
bool isConnectedTo(MessagePort* port);
bool hasPendingActivity();
// Releases ownership of the contained web channel.
WebKit::WebMessagePortChannel* webChannelRelease();
~PlatformMessagePortChannel();
private:
PlatformMessagePortChannel();
PlatformMessagePortChannel(WebKit::WebMessagePortChannel*);
void setEntangledChannel(PassRefPtr<PlatformMessagePortChannel>);
// WebKit::WebMessagePortChannelClient implementation
virtual void messageAvailable();
// Mutex used to ensure exclusive access to the object internals.
Mutex m_mutex;
// Pointer to our entangled pair - cleared when close() is called.
RefPtr<PlatformMessagePortChannel> m_entangledChannel;
// The port we are connected to - this is the port that is notified when new messages arrive.
MessagePort* m_localPort;
WebKit::WebMessagePortChannel* m_webChannel;
};
} // namespace WebCore
#endif // PlatformMessagePortChannel_h