A dbus.mainloop.NativeMainLoop instance is required [Was: Re: dbus-python: support for Windows and OS X]

[Ralf Habacker]

Am 02.02.2011 19:16, schrieb Lukas Hetzenecker:
> I was able to compile dbus and dbus-python on Windows without any problems,
> but now I get strange error messages when I try to create a D-Bus service:
>
> Windows XP; dbus 1.4.1-2
>
> C:\Python27\Lib\site-packages\dbus>C:\Python27\python.exe
> Python 2.7.1 (r271:86832, Nov 27 2010, 18:30:46) [MSC v.1500 32 bit (Intel)]
> on win32
>
>>>> import sys
>>>> import dbus
>>>> import dbus.service
>>>> import dbus.mainloop.qt
>>>> from PyQt4 import QtCore
>>>>
>>>> app = QtCore.QCoreApplication(sys.argv)
>>>> mainloop = dbus.mainloop.qt.DBusQtMainLoop(set_as_default=True)
>>>> sb = dbus.SessionBus()
>>>> name = dbus.service.BusName("net.sourceforge.series60remote", sb)
>
>>>> obj = dbus.service.Object.__init__(dbus.service.Object(), sb,
> '/Series60Remote')
> Traceback (most recent call last):
>    File "<stdin>", line 1, in<module>
>    File "C:\Python27\lib\site-packages\dbus\service.py", line 480, in __init__
>      self.add_to_connection(conn, object_path)
>    File "C:\Python27\lib\site-packages\dbus\service.py", line 571, in
> add_to_connection
>      self._fallback)
> RuntimeError: To make asynchronous calls, receive signals or export objects,
> D-Bus connections must be attached to a main loop by passing mainloop=... to
> the constructor or calling dbus.set_default_main_loop(...)
>
> But when I try to call dbus.set_default_main_loop I get this error:
>
>>>> dbus.set_default_main_loop(mainloop)
> Traceback (most recent call last):
>    File "<stdin>", line 1, in<module>
> TypeError: A dbus.mainloop.NativeMainLoop instance is required
>
>
> which is really odd, because mainloop is an instance of
> dbus.mainloop.NativeMainLoop:
maybe this is because the Native mainloop implementation in 
http://cgit.freedesktop.org/dbus/dbus-python/tree/_dbus_bindings/mainloop.c 
is a noop ?

/* Null mainloop implementation ===================================== */

static dbus_bool_t
noop_main_loop_cb(void *conn_or_server UNUSED, void *data UNUSED)
{
     return TRUE;
}

#define noop_conn_cb ((dbus_bool_t (*)(DBusConnection *, void 
*))(noop_main_loop_cb))
#define noop_server_cb ((dbus_bool_t (*)(DBusServer *, void 
*))(noop_main_loop_cb))


Regards

Ralf