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Re: [dbus-cplusplus-devel] Calling DeviceKit methods
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From: Zoltan B. <zol...@gm...> - 2009-09-09 06:15:03
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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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>
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