зеркало из https://github.com/mozilla/pjs.git
131 строка
3.8 KiB
C++
131 строка
3.8 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_SyncChannel_h
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#define ipc_glue_SyncChannel_h 1
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#include "mozilla/ipc/AsyncChannel.h"
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namespace mozilla {
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namespace ipc {
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//-----------------------------------------------------------------------------
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class SyncChannel : public AsyncChannel
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{
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protected:
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typedef uint16 MessageId;
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public:
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class /*NS_INTERFACE_CLASS*/ SyncListener :
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public AsyncChannel::AsyncListener
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{
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public:
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virtual ~SyncListener() { }
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virtual Result OnMessageReceived(const Message& aMessage) = 0;
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virtual Result OnMessageReceived(const Message& aMessage,
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Message*& aReply) = 0;
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};
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SyncChannel(SyncListener* aListener) :
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AsyncChannel(aListener),
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mPendingReply(0),
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mProcessingSyncMessage(false)
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#ifdef OS_WIN
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, mUIThreadId(0)
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, mEventLoopDepth(0)
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#endif
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{
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}
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virtual ~SyncChannel()
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{
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// FIXME/cjones: impl
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}
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bool Send(Message* msg) {
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return AsyncChannel::Send(msg);
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}
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// Synchronously send |msg| (i.e., wait for |reply|)
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bool Send(Message* msg, Message* reply);
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// Override the AsyncChannel handler so we can dispatch sync messages
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NS_OVERRIDE virtual void OnMessageReceived(const Message& msg);
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NS_OVERRIDE virtual void OnChannelError();
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static bool IsPumpingMessages();
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protected:
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// Executed on the worker thread
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bool ProcessingSyncMessage() {
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return mProcessingSyncMessage;
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}
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void OnDispatchMessage(const Message& aMsg);
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void WaitForNotify();
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#ifdef OS_WIN
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void RunWindowsEventLoop();
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#endif
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// Executed on the IO thread.
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void OnSendReply(Message* msg);
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void NotifyWorkerThread();
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// On both
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bool AwaitingSyncReply() {
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mMutex.AssertCurrentThreadOwns();
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return mPendingReply != 0;
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}
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MessageId mPendingReply;
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bool mProcessingSyncMessage;
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Message mRecvd;
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#ifdef OS_WIN
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DWORD mUIThreadId;
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int mEventLoopDepth;
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#endif
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};
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} // namespace ipc
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} // namespace mozilla
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#endif // ifndef ipc_glue_SyncChannel_h
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