author Benjamin Smedberg <benjamin@smedbergs.us>
Mon, 14 Dec 2009 11:26:15 -0500
changeset 36268 f80b4464d261a7ab6c6b340449dda2f7c272b511
parent 36140 7ebfbec7521c2e98786bad0d0f00720f2bb2d3e1
child 37473 ca51ffe72682739dbd2bac31bf35112747fc8141
permissions -rw-r--r--
Revert the electrolysis-plugins-only branch so that the Electrolysis repository can return to its normal (plugins and tabs) state.

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: sw=4 ts=4 et :
/* ***** BEGIN LICENSE BLOCK *****
 * 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.
 * 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"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 * ***** END LICENSE BLOCK ***** */

#ifndef ipc_glue_SyncChannel_h
#define ipc_glue_SyncChannel_h 1

#include "mozilla/ipc/AsyncChannel.h"

namespace mozilla {
namespace ipc {

class SyncChannel : public AsyncChannel
    typedef uint16 MessageId;

    class /*NS_INTERFACE_CLASS*/ SyncListener : 
        public AsyncChannel::AsyncListener
        virtual ~SyncListener() { }

        virtual void OnChannelClose() = 0;
        virtual void OnChannelError() = 0;
        virtual Result OnMessageReceived(const Message& aMessage) = 0;
        virtual Result OnMessageReceived(const Message& aMessage,
                                         Message*& aReply) = 0;

    SyncChannel(SyncListener* aListener);
    virtual ~SyncChannel();

    bool Send(Message* msg) {
        return AsyncChannel::Send(msg);

    // Synchronously send |msg| (i.e., wait for |reply|)
    bool Send(Message* msg, Message* reply);

    // Override the AsyncChannel handler so we can dispatch sync messages
    NS_OVERRIDE virtual void OnMessageReceived(const Message& msg);
    NS_OVERRIDE virtual void OnChannelError();

    static bool IsPumpingMessages() {
        return sIsPumpingMessages;
    static void SetIsPumpingMessages(bool aIsPumping) {
        sIsPumpingMessages = aIsPumping;

    // Executed on the worker thread
    bool ProcessingSyncMessage() {
        return mProcessingSyncMessage;

    void OnDispatchMessage(const Message& aMsg);
    void WaitForNotify();

    // Executed on the IO thread.
    void OnSendReply(Message* msg);
    void NotifyWorkerThread();

    // On both
    bool AwaitingSyncReply() {
        return mPendingReply != 0;

    MessageId mPendingReply;
    bool mProcessingSyncMessage;
    Message mRecvd;

    static bool sIsPumpingMessages;

} // namespace ipc
} // namespace mozilla
#endif  // ifndef ipc_glue_SyncChannel_h