Re: [Dbus-cxx-users] [Dbus-cxx-devel] dbus-cxx 0.6.0 released

[Rick L. V. Jr. <rvi...@cs...>]

Oliver Kowalke wrote:
> May I ask you for what reasons yout  throw exceptions as smart-pointers?
>
> thx and best regards,
> Oliver
>

Hello,

The dbus-cxx class DBus::Error wraps the dbus C struct DBusError. The
constructor takes care of calling dbus_error_init() and the destructor
takes care of dbus_error_free().

The problem with the previous implementation is that there was no
reference counting to the underlying C object, so a copy of DBus::Error
resulted in a premature dbus_error_free() of the underlying C object
because DBus::Error doesn't have a reference counting mechanism (neither
does DBusError).

The alternatives would be to add a reference counting mechanism to
DBus::Error (fairly trivial) or use the smart pointer's reference
mechanism.

I chose the latter because all the other classes in dbus-cxx should have
protected constructors with static public create() methods. This brings
DBus::Error in line with the others syntactically and uses a standardized
reference counting mechanism.

---

Rick