LCOV - code coverage report
Current view: directory - toolkit/system/dbus - nsDBusService.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 82 54 65.9 %
Date: 2012-06-02 Functions: 17 14 82.4 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2                 : /* vim:expandtab:shiftwidth=4:tabstop=4:
       3                 :  */
       4                 : /* ***** BEGIN LICENSE BLOCK *****
       5                 :  * Version: NPL 1.1/GPL 2.0/LGPL 2.1
       6                 :  *
       7                 :  *
       8                 :  * The contents of this file are subject to the Mozilla Public
       9                 :  * License Version 1.1 (the "License"); you may not use this file
      10                 :  * except in compliance with the License. You may obtain a copy of
      11                 :  * the License at http://www.mozilla.org/MPL/
      12                 :  *
      13                 :  * Software distributed under the License is distributed on an "AS
      14                 :  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
      15                 :  * implied. See the License for the specific language governing
      16                 :  * rights and limitations under the License.
      17                 :  *
      18                 :  * The Original Code is Novell code.
      19                 :  *
      20                 :  * The Initial Developer of the Original Code is Novell, Inc.
      21                 :  * Portions created by the Initial Developer are Copyright (C) 2006
      22                 :  * the Initial Developer. All Rights Reserved.
      23                 :  *
      24                 :  * Original Author: Robert O'Callahan (rocallahan@novell.com)
      25                 :  *
      26                 :  * Contributor(s):
      27                 :  *
      28                 :  * Alternatively, the contents of this file may be used under the terms of
      29                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      30                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      31                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      32                 :  * of those above. If you wish to allow use of your version of this file only
      33                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      34                 :  * use your version of this file under the terms of the NPL, indicate your
      35                 :  * decision by deleting the provisions above and replace them with the notice
      36                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      37                 :  * the provisions above, a recipient may use your version of this file under
      38                 :  * the terms of any one of the NPL, the GPL or the LGPL.
      39                 :  *
      40                 :  * ***** END LICENSE BLOCK ***** */
      41                 : 
      42                 : #include "nsDBusService.h"
      43                 : #include "nsComponentManagerUtils.h"
      44                 : 
      45                 : #include <glib.h>
      46                 : #include <dbus/dbus-glib-lowlevel.h>
      47                 : #include <dbus/dbus-glib.h>
      48                 : 
      49            1386 : nsDBusService::nsDBusService() {
      50            1386 :   mConnection = nsnull;
      51            1386 :   mSingleClient = nsnull;
      52            1386 : }
      53                 : 
      54            4149 : nsDBusService::~nsDBusService() {
      55            1383 :   NS_ASSERTION(!mSingleClient, "Client failed to unregister");
      56            1383 :   DropConnection();
      57            1383 :   if (mReconnectTimer) {
      58               0 :     mReconnectTimer->Cancel();
      59                 :   }
      60            1383 :   gSingleton = nsnull;
      61            5532 : }
      62                 : 
      63            6927 : NS_IMPL_ISUPPORTS1(nsDBusService, nsDBusService)
      64                 : NS_DEFINE_STATIC_IID_ACCESSOR(nsDBusService, NS_DBUS_IID)
      65                 : 
      66                 : nsDBusService* nsDBusService::gSingleton = nsnull;
      67                 : 
      68                 : already_AddRefed<nsDBusService>
      69            1386 : nsDBusService::Get() {
      70            1386 :   if (!gSingleton) {
      71            1386 :     gSingleton = new nsDBusService();
      72                 :   }
      73            1386 :   NS_IF_ADDREF(gSingleton);
      74            1386 :   return gSingleton;
      75                 : }
      76                 :   
      77                 : nsresult
      78            1386 : nsDBusService::AddClient(DBusClient* client) {
      79            1386 :   NS_ASSERTION(!mSingleClient, "Only one client supported right now");
      80            1386 :   mSingleClient = client;
      81            1386 :   nsresult rv = CreateConnection();
      82            1386 :   if (NS_FAILED(rv)) {
      83               0 :     mSingleClient = nsnull;
      84                 :   }
      85            1386 :   return rv;
      86                 : }
      87                 : 
      88                 : void
      89            1383 : nsDBusService::RemoveClient(DBusClient* client) {
      90            1383 :   NS_ASSERTION(mSingleClient == client, "Removing wrong client");
      91            1383 :   mSingleClient = nsnull;
      92            1383 : }
      93                 :   
      94                 : DBusPendingCall*
      95            1386 : nsDBusService::SendWithReply(DBusClient* client, DBusMessage* message) {
      96            1386 :   DBusPendingCall* reply = nsnull;
      97            1386 :   if (mConnection) {
      98            1386 :     if (!dbus_connection_send_with_reply(mConnection, message, &reply, -1)) {
      99               0 :       reply = nsnull;
     100                 :     }
     101                 :   }
     102            1386 :   dbus_message_unref(message);
     103            1386 :   return reply;
     104                 : }
     105                 : 
     106            1386 : bool nsDBusService::HandleMessage(DBusMessage* message) {
     107            1386 :   if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL,
     108            1386 :                             "Disconnected")) {
     109               0 :     HandleDBusDisconnect();
     110               0 :     return false;
     111                 :   }
     112                 :   
     113            1386 :   return mSingleClient && mSingleClient->HandleMessage(message);
     114                 : }
     115                 : 
     116            1386 : static DBusHandlerResult dbus_filter(DBusConnection* connection,
     117                 :                                      DBusMessage* message,
     118                 :                                      void* user_data) {
     119            1386 :   return static_cast<nsDBusService*>(user_data)->HandleMessage(message)
     120            1386 :     ? DBUS_HANDLER_RESULT_HANDLED : DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
     121                 : }
     122                 : 
     123               0 : void nsDBusService::DoTimerCallback(nsITimer *aTimer) {
     124               0 :   if (aTimer == mReconnectTimer.get()) {
     125               0 :     nsresult rv = CreateConnection();
     126               0 :     if (NS_SUCCEEDED(rv)) {
     127               0 :       mReconnectTimer->Cancel();
     128               0 :       mReconnectTimer = nsnull;
     129                 :     }
     130                 :   }
     131               0 : }
     132                 : 
     133               0 : static void TimerCallback(nsITimer *aTimer, void *aClosure) {
     134               0 :   static_cast<nsDBusService*>(aClosure)->DoTimerCallback(aTimer);
     135               0 : }
     136                 : 
     137            1383 : void nsDBusService::DropConnection() {
     138            1383 :   if (mConnection) {
     139            1383 :     dbus_connection_remove_filter(mConnection, dbus_filter, this);
     140            1383 :     if (mSingleClient) {
     141               0 :       mSingleClient->UnregisterWithConnection(mConnection);
     142                 :     }
     143            1383 :     dbus_connection_unref(mConnection);
     144            1383 :     mConnection = nsnull;
     145                 :   }
     146            1383 : }
     147                 : 
     148               0 : void nsDBusService::HandleDBusDisconnect() {
     149               0 :   DropConnection();
     150                 : 
     151                 :   nsresult rv;
     152               0 :   mReconnectTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
     153               0 :   if (NS_FAILED(rv))
     154               0 :     return;
     155               0 :   rv = mReconnectTimer->InitWithFuncCallback(TimerCallback, this,
     156               0 :                                              5000, nsITimer::TYPE_REPEATING_SLACK);
     157               0 :   if (NS_FAILED(rv)) {
     158               0 :     mReconnectTimer = nsnull;
     159               0 :     return;
     160                 :   }
     161                 : }
     162                 : 
     163            1386 : nsresult nsDBusService::CreateConnection() {
     164            1386 :   mConnection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
     165            1386 :   if (!mConnection)
     166               0 :     return NS_ERROR_FAILURE;
     167                 : 
     168            1386 :   dbus_connection_set_exit_on_disconnect(mConnection, false);
     169            1386 :   dbus_connection_setup_with_g_main(mConnection, NULL);
     170                 : 
     171            1386 :   if (!dbus_connection_add_filter(mConnection, dbus_filter, this, NULL))
     172               0 :     return NS_ERROR_FAILURE;
     173                 : 
     174            1386 :   mSingleClient->RegisterWithConnection(mConnection);
     175            1386 :   return NS_OK;
     176                 : }

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