void KLibLoader::unloadLibrary(const char *libname)
{
KLibWrapPrivate *wrap = m_libs[libname];
if(!wrap)
return;
if(--wrap->ref_count)
return;
// kdDebug(150) << "closing library " << libname << endl;
m_libs.remove(libname);
disconnect(wrap->lib, SIGNAL(destroyed()), this, SLOT(slotLibraryDestroyed()));
close_pending(wrap);
}
void KLibLoader::close_pending(KLibWrapPrivate *wrap)
{
if (wrap && !d->pending_close.containsRef( wrap ))
d->pending_close.append( wrap );
/* First delete all KLibrary objects in pending_close, but _don't_ unload
the DSO behind it. */
QPtrListIterator<KLibWrapPrivate> it(d->pending_close);
for (; it.current(); ++it) {
wrap = it.current();
if (wrap->lib) {
disconnect( wrap->lib, SIGNAL( destroyed() ),
this, SLOT( slotLibraryDestroyed() ) );
KLibrary* to_delete = wrap->lib;
wrap->lib = 0L; // unset first, because KLibrary dtor can cause
delete to_delete; // recursive call to close_pending()
}
}
if (d->unload_mode == KLibLoaderPrivate::DONT_UNLOAD) {
d->pending_close.clear();
return;
}
bool deleted_one = false;
while ((wrap = d->loaded_stack.first())) {
/* Let's first see, if we want to try to unload this lib.
If the env. var KDE_DOUNLOAD is set, we try to unload every lib.
If not, we look at the lib itself, and unload it only, if it exports
the symbol __kde_do_unload. */
if (d->unload_mode != KLibLoaderPrivate::UNLOAD
&& wrap->unload_mode != KLibWrapPrivate::UNLOAD)
break;
/* Now ensure, that the libs are only unloaded in the reverse direction
they were loaded. */
if (!d->pending_close.containsRef( wrap )) {
if (!deleted_one)
/* Only diagnose, if we really haven't deleted anything. */
// kdDebug(150) << "try to dlclose " << wrap->name << ": not yet" << endl;
break;
}
// kdDebug(150) << "try to dlclose " << wrap->name << ": yes, done." << endl;
if ( !deleted_one ) {
/* Only do the hack once in this loop.
WABA: *HACK*
We need to make sure to clear the clipboard before unloading a DSO
because the DSO could have defined an object derived from QMimeSource
and placed that on the clipboard. */
/*kapp->clipboard()->clear();*/
/* Well.. let's do something more subtle... convert the clipboard context
to text. That should be safe as it only uses objects defined by Qt. */
if( kapp->clipboard()->ownsSelection()) {
kapp->clipboard()->setText(
kapp->clipboard()->text( QClipboard::Selection ), QClipboard::Selection );
}
if( kapp->clipboard()->ownsClipboard()) {
kapp->clipboard()->setText(
kapp->clipboard()->text( QClipboard::Clipboard ), QClipboard::Clipboard );
}
}
deleted_one = true;
lt_dlclose(wrap->handle);
d->pending_close.removeRef(wrap);
/* loaded_stack is AutoDelete, so wrap is freed */
d->loaded_stack.remove();
}
}
KLibrary* KLibLoader::library( const char *name )
{
if (!name)
return 0;
KLibWrapPrivate* wrap = m_libs[name];
if (wrap) {
/* Nothing to do to load the library. */
wrap->ref_count++;
return wrap->lib;
}
/* Test if this library was loaded at some time, but got
unloaded meanwhile, whithout being dlclose()'ed. */
QPtrListIterator<KLibWrapPrivate> it(d->loaded_stack);
for (; it.current(); ++it) {
if (it.current()->name == name)
wrap = it.current();
}
if (wrap) {
d->pending_close.removeRef(wrap);
if (!wrap->lib) {
/* This lib only was in loaded_stack, but not in m_libs. */
wrap->lib = new KLibrary( name, wrap->filename, wrap->handle );
}
wrap->ref_count++;
} else {
QString libfile = findLibrary( name );
if ( libfile.isEmpty() )
{
const QCString libname = makeLibName( name );
#ifndef NDEBUG
kdDebug(150) << "library=" << name << ": No file named " << libname << " found in paths." << endl;
#endif
d->errorMessage = i18n("Library files for \"%1\" not found in paths.").arg(libname);
return 0;
}
lt_dlhandle handle = lt_dlopen( QFile::encodeName(libfile) );
if ( !handle )
{
const char* errmsg = lt_dlerror();
if(errmsg)
d->errorMessage = QString::fromLocal8Bit(errmsg);
else
d->errorMessage = QString::null;
return 0;
}
else
d->errorMessage = QString::null;
KLibrary *lib = new KLibrary( name, libfile, handle );
wrap = new KLibWrapPrivate(lib, handle);
d->loaded_stack.prepend(wrap);
}
m_libs.insert( name, wrap );
connect( wrap->lib, SIGNAL( destroyed() ),
this, SLOT( slotLibraryDestroyed() ) );
return wrap->lib;
}