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Re: [dbus-cplusplus-devel] Calling DeviceKit methods
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From: Andreas V. <li...@br...> - 2009-09-13 18:35:21
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Am Thu, 10 Sep 2009 12:46:38 +0500 schrieb Zoltan Bencik:
Hello Zoltan,
If you progress with wx main loop integration please come back. I'm
interested to get this into the dbus-c++ source.
regards
Andreas
> Hello Andreas,
>
> Yes, dbus-c++ main loop was causing this problem.
> I solved this issue by firing all dbus-c++ calls in separate thread
> and now everything works as it should.
> This is temporary solution, which I'll be later rewriting to wx event
> loops.
>
> Thanks for your help.
>
>
> On Wed, Sep 9, 2009 at 11:32 PM, Andreas Volz <li...@br...>
> wrote:
> > Am Wed, 9 Sep 2009 11:14:57 +0500 schrieb Zoltan Bencik:
> >
> > Hello Zoltan,
> >
> > I think that I know the problem. You use the DBus::BusDispatcher
> > dispatcher Dbus-C++ own main loop. This is not very good tested and
> > many people have reported problems.
> >
> > I use the glib and ecore (Gitorious branch) main loop integration
> > with success. You need a main loop integration that fits to
> > wxWidgets. I'm sure nobody has tested this yet. Maybe it will work
> > because the wxGTK toolkit works together with the glib main loop
> > integration.
> >
> > But pay attention that then it works only with wxGtk, but not other
> > wxWidget backends.
> >
> > Look in the glib example hot to use it.
> >
> > regards
> > Andreas
> >
> >> Hello Andreas,
> >>
> >> Thanks for your kind response.
> >>
> >> It seems like the GUI library(wxWidgets on Linux, wxGTK build) I'm
> >> using is causing some problems(not sure).
> >> Could you please tell me if my dbus-c++ usage is correct from the
> >> code listed below?
> >> Maybe I missed to register some callbacks, which I have to handle,
> >> or passing method parameters incorrectly,
> >> or anything else.
> >> GUI library throws me an assert, which has to deal with even
> >> notifiers. I tried to use dbus-c++ in console application, and
> >> UnMount worked just fine.
> >>
> >> Here is the stack trace from Eclipse IDE, when I try to call
> >> invoke_method. I don't think it will be any helpful, since it's
> >> trace when GUI is about to die.
> >>
> >> Thread [1] (Suspended)
> >> 22 pthread_mutex_unlock() 0x00ab51a0
> >> 21 _dl_open() 0x008f69eb
> >> 20 do_dlopen() 0x00a22952
> >> 19 _dl_catch_error() 0x008f2806
> >> 18 __libc_dlopen_mode() 0x00a22b15
> >> 17 init() 0x009fb858
> >> 16 pthread_once() 0x00ab73f0
> >> 15 backtrace() 0x009fba45
> >> 14 wxStackWalker::SaveStack()
> >> /home/zoltan/Development/wx/src/unix/stackwalk.cpp:169 0x083edb79
> >> 13 wxGUIAppTraits::ShowAssertDialog()
> >> /home/zoltan/Development/wx/src/gtk/utilsgtk.cpp:379 0x08216dd8
> >> 12 ShowAssertDialog()
> >> /home/zoltan/Development/wx/src/common/appbase.cpp:836 0x08363cd0
> >> 11 wxAppConsole::OnAssertFailure()
> >> /home/zoltan/Development/wx/src/common/appbase.cpp:445 0x08364042
> >> 10 wxApp::OnAssertFailure()
> >> /home/zoltan/Development/wx/src/gtk/app.cpp:556 0x0820556f
> >> 9
> >> wxOnAssert() /home/zoltan/Development/wx/src/common/appbase.cpp:711
> >> 0x08363df7 8 wxEventLoop::~wxEventLoop()
> >> /home/zoltan/Development/wx/src/gtk/evtloop.cpp:64 0x0830fedf
> >> 7 wxEventLoopPtr::~wxEventLoopPtr()
> >> /home/zoltan/Development/wx/src/common/appcmn.cpp:74 0x0826f6d5
> >> 6 wxEventLoopTiedPtr::~wxEventLoopTiedPtr()
> >> /home/zoltan/Development/wx/src/common/appcmn.cpp:74 0x082705f1
> >> 5 wxAppBase::MainLoop()
> >> /home/zoltan/Development/wx/src/common/appcmn.cpp:312 0x0826fe7a
> >> 4 wxAppBase::OnRun()
> >> /home/zoltan/Development/wx/src/common/appcmn.cpp:367 0x0826f8b3
> >> 3
> >> wxEntry() /home/zoltan/Development/wx/src/common/init.cpp:460
> >> 0x08395273 2
> >> wxEntry() /home/zoltan/Development/wx/src/common/init.cpp:472
> >> 0x08395479 1
> >> main() /home/zoltan/Development/DBusCPPTest/src/main_app.cpp:42
> >> 0x0808438b
> >>
> >>
> >> Thanks.
> >> br,
> >> -zoltan.
> >>
> >> On Wed, Sep 9, 2009 at 1:35 AM, Andreas Volz<li...@br...>
> >> wrote:
> >> > Am Tue, 8 Sep 2009 18:34:11 +0500 schrieb Zoltan Bencik:
> >> >
> >> > Hello Zoltan,
> >> >
> >> > I suggest you should compile dbus-c++ with debug option
> >> > (--configure --enable-debug), your application with -O0 -ggdb
> >> > and run it in gdb.
> >> >
> >> > This would tell us all a lot of useful information.
> >> >
> >> > regards
> >> > Andreas
> >> >
> >> >> Hello All,
> >> >>
> >> >> I'm trying to mount and unmount devices through dbus-c++
> >> >> binding, using DeviceKit.Disks.Device interface methods.
> >> >> While trying to unmount device, I get a 'SIGTRAP' signal.
> >> >> Can anybody show me what I'm doing wrong in this code?
> >> >>
> >> >> Thanks, any help is very appreciated.
> >> >>
> >> >>
> >> >> // Proxy implementation
> >> >> DisksDeviceProxy::DisksDeviceProxy(DBus::Connection &connection,
> >> >> const char *object_path)
> >> >> : DBus::InterfaceProxy("org.freedesktop.DeviceKit.Disks"),
> >> >> DBus::ObjectProxy(connection, object_path,
> >> >> "org.freedesktop.DeviceKit.Disks.Device")
> >> >> {
> >> >> }
> >> >>
> >> >> // Mount device
> >> >> void DisksDeviceProxy::MountDevice(const char *fstype,
> >> >> std::vector<std::string> &options)
> >> >> {
> >> >> ::DBus::CallMessage call;
> >> >> ::DBus::MessageIter wi = call.writer();
> >> >>
> >> >> wi << fstype;
> >> >> wi << options;
> >> >> call.member("FilesystemMount");
> >> >> ::DBus::Message ret = invoke_method (call);
> >> >> ::DBus::MessageIter ri = ret.reader();
> >> >> }
> >> >>
> >> >> // Unmount device
> >> >> void DisksDeviceProxy::UnMountDevice(std::vector<std::string>
> >> >> &options) {
> >> >> ::DBus::CallMessage call;
> >> >> ::DBus::MessageIter wi = call.writer();
> >> >>
> >> >> wi << options;
> >> >> call.member("FilesystemUnmount");
> >> >> ::DBus::Message ret = invoke_method (call); // Signaled
> >> >> SIGTRAP right here ::DBus::MessageIter ri = ret.reader();
> >> >> }
> >> >>
> >> >> And here is the code, how I'm trying to unmount device:
> >> >> //-- START
> >> >> DBus::BusDispatcher dispatcher;
> >> >> DBus::default_dispatcher = &dispatcher;
> >> >>
> >> >> DBus::Connection conn = DBus::Connection::SystemBus();
> >> >>
> >> >> DisksDeviceProxy devkit(conn,
> >> >> "/org/freedesktop/DeviceKit/Disks/devices/sdb1"); // for now,
> >> >> just hard coded value of my USB device
> >> >> std::vector<std::string>options;
> >> >> devkit.UnMountDevice(options);
> >> >> //-- END
> >> >>
> >> >> ------------------------------------------------------------------------------
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> >> >> dbu...@li...
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> >> >>
> >> >
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> >> >
> >>
> >
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> >
>
>
>
> --
> Best regards,
> -zoltan.
>
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