[dbus-cplusplus-devel] Odd hangs on futex() after method calls return

[Dana G. <dan...@gm...>]

I'm trying to use the DBus-C++ libraries to talk to bluez, and I'm 
finding that the dbus-c++ library keeps hanging on some futex even after 
strace shows it successfully receiving all expected data.  Sometimes it 
hangs on calling DBus::ObjectProxy()... and other times it hangs on 
calling GetProperties() for an object that was just constructed.

I have attached a log of gdb and strace -- however, due to the 
"Heisenbug" behavior under gdb and strace, the two logs do not show the 
exact same hang.  Most notably, strace itself seems to sometimes fix the 
behavior.

Device::Device(DBus::Connection* connection, const ::DBus::Path& path, 
Adapter* adapter, Manager * manager, map < string, DBus::Variant> 
properties)
      : ::org::bluez::Device_proxy()
      , DBus::ObjectProxy(*connection, path, "org.bluez") <-- this is 
device.cpp, line 22.

If anyone has any advice for how to fix this hang, I would greatly 
appreciate it.  My libdbus-c++ package version is 0~20090907-1 on 64-bit 
Ubuntu Lucid -- but I've now also manually built and installed the 
"Unofficial GIT Variant" at 
git://gitorious.org/dbus-cplusplus/mainline.git .

Additionally, does anyone know how to set a shorter timeout for method 
calls?  The only "set" method I can find takes an undocumented, private 
"Timeout::Internal" class.

Thanks for any help you can give.
-- Dana