5 files changed, 19 insertions, 0 deletions
diff --git a/src/libs/client/NodeModel.cpp b/src/libs/client/NodeModel.cpp
index c7b38ceb..8c5892e7 100644
--- a/src/libs/client/NodeModel.cpp
+++ b/src/libs/client/NodeModel.cpp
@@ -151,6 +151,8 @@ NodeModel::port_value_range(SharedPtr<PortModel> port, float& min, float& max)
 {
 	assert(port->parent().get() == this);
 
+	Glib::Mutex::Lock(PluginModel::rdf_world()->mutex());
+	
 	// FIXME: cache these values
 	
 	// Plugin value first
diff --git a/src/libs/client/PluginModel.cpp b/src/libs/client/PluginModel.cpp
index 1e6729d6..10c767ff 100644
--- a/src/libs/client/PluginModel.cpp
+++ b/src/libs/client/PluginModel.cpp
@@ -28,6 +28,8 @@ namespace Client {
 SLV2World   PluginModel::_slv2_world   = NULL;
 SLV2Plugins PluginModel::_slv2_plugins = NULL;
 #endif
+
+Raul::RDF::World* PluginModel::_rdf_world = NULL;
 	
 
 string
@@ -56,6 +58,8 @@ PluginModel::gui()
 {
 	assert(_type == LV2);
 	
+	Glib::Mutex::Lock(_rdf_world->mutex());
+	
 	SLV2Values gui = slv2_plugin_get_guis(_slv2_plugin);
 	if (slv2_values_size(gui) > 0) {
 		printf("\tGUI:\n");
diff --git a/src/libs/client/PluginModel.hpp b/src/libs/client/PluginModel.hpp
index a8d420b8..ba5598c0 100644
--- a/src/libs/client/PluginModel.hpp
+++ b/src/libs/client/PluginModel.hpp
@@ -23,6 +23,7 @@
 #include <iostream>
 #include <raul/Path.hpp>
 #include <raul/SharedPtr.hpp>
+#include <raul/RDFWorld.hpp>
 #ifdef HAVE_SLV2
 #include <slv2/slv2.h>
 #endif
@@ -109,6 +110,12 @@ public:
 	void* gui();
 #endif
 
+	static void set_rdf_world(Raul::RDF::World& world) {
+		_rdf_world = &world;
+	}
+
+	static Raul::RDF::World* rdf_world() { return _rdf_world; }
+
 private:
 	Type   _type;
 	string _uri;
@@ -120,6 +127,8 @@ private:
 
 	SLV2Plugin _slv2_plugin;
 #endif
+
+	static Raul::RDF::World* _rdf_world;
 };
 
 
diff --git a/src/libs/gui/App.cpp b/src/libs/gui/App.cpp
index b36c5c07..b07352d7 100644
--- a/src/libs/gui/App.cpp
+++ b/src/libs/gui/App.cpp
@@ -85,6 +85,8 @@ App::App(Ingen::Shared::World* world)
 	rdf_world.add_prefix("rdfs", "http://www.w3.org/2000/01/rdf-schema#");
 	rdf_world.add_prefix("doap", "http://usefulinc.com/ns/doap#");
 	
+	PluginModel::set_rdf_world(rdf_world);
+
 #ifdef HAVE_SLV2
 	PluginModel::set_slv2_world(world->slv2_world);
 #endif
diff --git a/src/libs/gui/PatchCanvas.cpp b/src/libs/gui/PatchCanvas.cpp
index dc1504ef..ee3c326e 100644
--- a/src/libs/gui/PatchCanvas.cpp
+++ b/src/libs/gui/PatchCanvas.cpp
@@ -171,6 +171,8 @@ PatchCanvas::build_plugin_class_menu(Gtk::Menu* menu,
 void
 PatchCanvas::build_plugin_menu()
 {
+	Glib::Mutex::Lock(PluginModel::rdf_world()->mutex());
+
 	_menu->items().push_back(Gtk::Menu_Helpers::ImageMenuElem("Plugin",
 			*(manage(new Gtk::Image(Gtk::Stock::EXECUTE, Gtk::ICON_SIZE_MENU)))));
     Gtk::MenuItem* plugin_menu_item = &(_menu->items().back());