kconfig sync at exit

[Matthias Kretz]

On Wednesday 20 June 2007, Thomas Zander wrote:
> Hi,
>
> In KOffice I added a 'savePreferences()' to the destructor of my document
> class which creates a config group and writes a bunch of properties to
> it.
>
> I was surprised to see that I had to manually call 'config->sync()'
> afterwards since none of my changes (not even the new group) appeared in
> the config due to the app quitting shortly after.

if it's not crashing, then it's leaking the KConfig object, so that its dtor 
never gets called.

For the KGlobal::config() there are two ways to leak it:
1.
{
  KSharedConfigPtr *x = new KSharedConfigPtr(KGlobal::config());
}

2a.
{
  KComponentData *x = new KComponentData(KGlobal::mainComponent());
}

or

2b.
int main()
{
  KComponentData *cd = new KComponentData;
  ...
  // no delete
}

The lifetime of the global config object and the componentdata object is the 
same (i.e. they only die when both of their refcounts go to 1 - ok, that's a 
bit simplified because KStandardDirs messes it up even further). That's why, 
if one is leaked, the other one won't die as well.

-- 
________________________________________________________
Matthias Kretz (Germany)                            <><
http://Vir.homelinux.org/
MatthiasKretz at gmx.net, kretz at kde.org,
Matthias.Kretz at urz.uni-heidelberg.de
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