gecko/toolkit/system/dbus/nsDBusService.h
2012-05-21 12:12:37 +01:00

76 lines
2.3 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:expandtab:shiftwidth=4:tabstop=4:
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef NSDBUSSERVICE_H_
#define NSDBUSSERVICE_H_
#define DBUS_API_SUBJECT_TO_CHANGE
#include <dbus/dbus.h>
#include "nsITimer.h"
#include "nsCOMPtr.h"
class DBusClient {
public:
virtual void RegisterWithConnection(DBusConnection* connection) = 0;
virtual void UnregisterWithConnection(DBusConnection* connection) = 0;
virtual bool HandleMessage(DBusMessage* msg) = 0;
};
#define NS_DBUS_IID \
{ 0xba4f79b7, 0x0d4c, 0x4b3a, { 0x8a, 0x85, 0x6f, 0xb3, 0x0d, 0xce, 0xf5, 0x11 } }
/**
* The nsDBusService component interfaces with DBUS to communicate with daemons
* in systems supporting DBUS. It links dynamically to the DBUS libraries so
* will not load on systems without those libraries ... but that's harmless.
*
* Currently the only daemon we communicate with is NetworkManager. We listen
* for NetworkManager state changes; we set nsIOService's offline status to
* FALSE when NetworkManager reports NM_STATE_CONNECTED, and to TRUE otherwise.
* We also solicit the current status from NetworkManager when this component
* gets loaded.
*
* In the future we could extend this class to talk to other daemons.
*
* Currently all communication is asynchronous. This isn't hard to implement
* and avoids blocking our main thread.
*/
class nsDBusService : public nsISupports
{
public:
nsDBusService();
virtual ~nsDBusService();
NS_DECL_ISUPPORTS
NS_DECLARE_STATIC_IID_ACCESSOR(NS_DBUS_IID)
static already_AddRefed<nsDBusService> Get();
nsresult AddClient(DBusClient* client);
void RemoveClient(DBusClient* client);
DBusPendingCall* SendWithReply(DBusClient* client, DBusMessage* message);
// these should be private but we need to call them from static functions
bool HandleMessage(DBusMessage* message);
void DoTimerCallback(nsITimer* aTimer);
private:
nsresult CreateConnection();
void DropConnection();
void HandleDBusDisconnect();
static nsDBusService* gSingleton;
DBusConnection* mConnection;
nsCOMPtr<nsITimer> mReconnectTimer;
DBusClient* mSingleClient;
};
#endif /*NSDBUSSERVICE_H_*/