pjs/ipc/glue/AsyncChannel.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: sw=4 ts=4 et :
*/
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Plugin App.
*
* The Initial Developer of the Original Code is
* Chris Jones <jones.chris.g@gmail.com>
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
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* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#ifndef ipc_glue_AsyncChannel_h
#define ipc_glue_AsyncChannel_h 1
#include "base/basictypes.h"
#include "base/message_loop.h"
#include "chrome/common/ipc_channel.h"
namespace mozilla {
namespace ipc {
//-----------------------------------------------------------------------------
class AsyncChannel : public IPC::Channel::Listener
{
protected:
enum ChannelState {
ChannelClosed,
ChannelOpening,
ChannelIdle, // => connected
ChannelWaiting, // => connected
ChannelError
};
public:
typedef IPC::Channel Transport;
typedef IPC::Message Message;
class /*NS_INTERFACE_CLASS*/ Listener
{
public:
enum Result {
MsgProcessed,
MsgNotKnown,
MsgNotAllowed,
MsgPayloadError,
MsgRouteError,
MsgValueError,
};
virtual ~Listener() { }
virtual Result OnMessageReceived(const Message& aMessage) = 0;
};
AsyncChannel(Listener* aListener) :
mTransport(0),
mListener(aListener),
mChannelState(ChannelClosed),
mIOLoop(),
mWorkerLoop()
{
}
virtual ~AsyncChannel()
{
if (mTransport)
Close();
mTransport = 0;
}
// Open from the perspective of the RPC layer; the transport
// should already be connected, or ready to connect.
bool Open(Transport* aTransport, MessageLoop* aIOLoop=0);
// Close from the perspective of the RPC layer; leaves the
// underlying transport channel open, however.
void Close();
// Asynchronously send a message to the other side of the channel
bool Send(Message* msg);
// Implement the IPC::Channel::Listener interface
virtual void OnMessageReceived(const Message& msg);
virtual void OnChannelConnected(int32 peer_pid);
virtual void OnChannelError();
protected:
// Additional methods that execute on the worker thread
void OnDispatchMessage(const Message& aMsg);
// Additional methods that execute on the IO thread
void OnChannelOpened();
void OnSend(Message* aMsg);
Transport* mTransport;
Listener* mListener;
ChannelState mChannelState;
MessageLoop* mIOLoop; // thread where IO happens
MessageLoop* mWorkerLoop; // thread where work is done
};
} // namespace ipc
} // namespace mozilla
#endif // ifndef ipc_glue_AsyncChannel_h