gecko/toolkit/system/dbus/nsDBusService.cpp

176 lines
5.3 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:expandtab:shiftwidth=4:tabstop=4:
*/
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 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 Novell code.
*
* The Initial Developer of the Original Code is Novell, Inc.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Original Author: Robert O'Callahan (rocallahan@novell.com)
*
* 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 NPL, 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 NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsDBusService.h"
#include "nsComponentManagerUtils.h"
#include <glib.h>
#include <dbus/dbus-glib-lowlevel.h>
#include <dbus/dbus-glib.h>
nsDBusService::nsDBusService() {
mConnection = nsnull;
mSingleClient = nsnull;
}
nsDBusService::~nsDBusService() {
NS_ASSERTION(!mSingleClient, "Client failed to unregister");
DropConnection();
if (mReconnectTimer) {
mReconnectTimer->Cancel();
}
gSingleton = nsnull;
}
NS_IMPL_ISUPPORTS1(nsDBusService, nsDBusService)
NS_DEFINE_STATIC_IID_ACCESSOR(nsDBusService, NS_DBUS_IID)
nsDBusService* nsDBusService::gSingleton = nsnull;
already_AddRefed<nsDBusService>
nsDBusService::Get() {
if (!gSingleton) {
gSingleton = new nsDBusService();
}
NS_IF_ADDREF(gSingleton);
return gSingleton;
}
nsresult
nsDBusService::AddClient(DBusClient* client) {
NS_ASSERTION(!mSingleClient, "Only one client supported right now");
mSingleClient = client;
nsresult rv = CreateConnection();
if (NS_FAILED(rv)) {
mSingleClient = nsnull;
}
return rv;
}
void
nsDBusService::RemoveClient(DBusClient* client) {
NS_ASSERTION(mSingleClient == client, "Removing wrong client");
mSingleClient = nsnull;
}
DBusPendingCall*
nsDBusService::SendWithReply(DBusClient* client, DBusMessage* message) {
DBusPendingCall* reply = nsnull;
if (mConnection) {
if (!dbus_connection_send_with_reply(mConnection, message, &reply, -1)) {
reply = nsnull;
}
}
dbus_message_unref(message);
return reply;
}
PRBool nsDBusService::HandleMessage(DBusMessage* message) {
if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL,
"Disconnected")) {
HandleDBusDisconnect();
return PR_FALSE;
}
return mSingleClient && mSingleClient->HandleMessage(message);
}
static DBusHandlerResult dbus_filter(DBusConnection* connection,
DBusMessage* message,
void* user_data) {
return static_cast<nsDBusService*>(user_data)->HandleMessage(message)
? DBUS_HANDLER_RESULT_HANDLED : DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
void nsDBusService::DoTimerCallback(nsITimer *aTimer) {
if (aTimer == mReconnectTimer.get()) {
nsresult rv = CreateConnection();
if (NS_SUCCEEDED(rv)) {
mReconnectTimer->Cancel();
mReconnectTimer = nsnull;
}
}
}
static void TimerCallback(nsITimer *aTimer, void *aClosure) {
static_cast<nsDBusService*>(aClosure)->DoTimerCallback(aTimer);
}
void nsDBusService::DropConnection() {
if (mConnection) {
if (mSingleClient) {
mSingleClient->UnregisterWithConnection(mConnection);
}
dbus_connection_unref(mConnection);
mConnection = nsnull;
}
}
void nsDBusService::HandleDBusDisconnect() {
DropConnection();
nsresult rv;
mReconnectTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
if (NS_FAILED(rv))
return;
rv = mReconnectTimer->InitWithFuncCallback(TimerCallback, this,
5000, nsITimer::TYPE_REPEATING_SLACK);
if (NS_FAILED(rv)) {
mReconnectTimer = nsnull;
return;
}
}
nsresult nsDBusService::CreateConnection() {
mConnection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
if (!mConnection)
return NS_ERROR_FAILURE;
dbus_connection_set_exit_on_disconnect(mConnection, PR_FALSE);
dbus_connection_setup_with_g_main(mConnection, NULL);
if (!dbus_connection_add_filter(mConnection, dbus_filter, this, NULL))
return NS_ERROR_FAILURE;
mSingleClient->RegisterWithConnection(mConnection);
return NS_OK;
}