mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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180 lines
5.4 KiB
C++
180 lines
5.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: sw=4 ts=4 et :
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*/
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Plugin App.
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*
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* The Initial Developer of the Original Code is
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* Chris Jones <jones.chris.g@gmail.com>
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* Portions created by the Initial Developer are Copyright (C) 2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef ipc_glue_AsyncChannel_h
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#define ipc_glue_AsyncChannel_h 1
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#include "base/basictypes.h"
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#include "base/message_loop.h"
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#include "chrome/common/ipc_channel.h"
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#include "mozilla/CondVar.h"
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#include "mozilla/Mutex.h"
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//-----------------------------------------------------------------------------
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namespace mozilla {
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namespace ipc {
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struct HasResultCodes
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{
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enum Result {
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MsgProcessed,
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MsgNotKnown,
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MsgNotAllowed,
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MsgPayloadError,
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MsgRouteError,
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MsgValueError,
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};
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};
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class AsyncChannel : public IPC::Channel::Listener, protected HasResultCodes
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{
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protected:
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typedef mozilla::CondVar CondVar;
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typedef mozilla::Mutex Mutex;
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enum ChannelState {
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ChannelClosed,
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ChannelOpening,
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ChannelConnected,
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ChannelError
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};
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public:
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typedef IPC::Channel Transport;
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typedef IPC::Message Message;
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class /*NS_INTERFACE_CLASS*/ AsyncListener: protected HasResultCodes
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{
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public:
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virtual ~AsyncListener() { }
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virtual Result OnMessageReceived(const Message& aMessage) = 0;
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};
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public:
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AsyncChannel(AsyncListener* aListener) :
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mTransport(0),
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mListener(aListener),
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mChannelState(ChannelClosed),
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mMutex("mozilla.ipc.AsyncChannel.mMutex"),
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mCvar(mMutex, "mozilla.ipc.AsyncChannel.mCvar"),
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mIOLoop(),
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mWorkerLoop()
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{
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}
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virtual ~AsyncChannel()
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{
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if (!mChild && mTransport)
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Close();
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// we only hold a weak ref to the transport, which is "owned"
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// by GeckoChildProcess/GeckoThread
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mTransport = 0;
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}
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// Open from the perspective of the transport layer; the underlying
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// socketpair/pipe should already be created.
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//
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// Returns true iff the transport layer was successfully connected,
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// i.e., mChannelState == ChannelConnected.
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bool Open(Transport* aTransport, MessageLoop* aIOLoop=0);
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// Close the underlying transport channel.
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void Close();
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// Asynchronously send a message to the other side of the channel
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bool Send(Message* msg);
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// Implement the IPC::Channel::Listener interface
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NS_OVERRIDE virtual void OnMessageReceived(const Message& msg);
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NS_OVERRIDE virtual void OnChannelConnected(int32 peer_pid);
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NS_OVERRIDE virtual void OnChannelError();
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protected:
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// Can be run on either thread
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void AssertWorkerThread()
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{
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NS_ABORT_IF_FALSE(mWorkerLoop == MessageLoop::current(),
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"not on worker thread!");
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}
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void AssertIOThread()
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{
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NS_ABORT_IF_FALSE(mIOLoop == MessageLoop::current(),
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"not on IO thread!");
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}
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bool Connected() {
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mMutex.AssertCurrentThreadOwns();
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return ChannelConnected == mChannelState;
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}
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// Run on the worker thread
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void OnDispatchMessage(const Message& aMsg);
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bool MaybeHandleError(Result code, const char* channelName);
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void ReportConnectionError(const char* channelName);
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void PrintErrorMessage(const char* channelName, const char* msg)
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{
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fprintf(stderr, "\n###!!! [%s][%s] Error: %s\n\n",
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mChild ? "Child" : "Parent", channelName, msg);
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}
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// Run on the IO thread
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void OnChannelOpened();
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void OnSend(Message* aMsg);
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void OnClose();
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Transport* mTransport;
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AsyncListener* mListener;
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ChannelState mChannelState;
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Mutex mMutex;
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CondVar mCvar;
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MessageLoop* mIOLoop; // thread where IO happens
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MessageLoop* mWorkerLoop; // thread where work is done
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bool mChild; // am I the child or parent?
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};
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} // namespace ipc
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} // namespace mozilla
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#endif // ifndef ipc_glue_AsyncChannel_h
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