5 files changed, 25 insertions, 7 deletions
diff --git a/src/shared/Module.hpp b/src/shared/Module.hpp
index 60acf1ff..a34db75f 100644
--- a/src/shared/Module.hpp
+++ b/src/shared/Module.hpp
@@ -38,6 +38,7 @@ struct Module {
 	}
 
 	virtual void load(Ingen::Shared::World* world) = 0;
+	virtual void run(Ingen::Shared::World* world) {}
 
 	SharedPtr<Glib::Module> library;
 };
diff --git a/src/shared/ResourceImpl.cpp b/src/shared/ResourceImpl.cpp
index 14227ccf..729a8152 100644
--- a/src/shared/ResourceImpl.cpp
+++ b/src/shared/ResourceImpl.cpp
@@ -39,17 +39,19 @@ ResourceImpl::add_property(const Raul::URI& uri, const Raul::Atom& value)
 	_properties.insert(make_pair(uri, value));
 }
 
-Raul::Atom&
+const Raul::Atom&
 ResourceImpl::set_property(const Raul::URI& uri, const Raul::Atom& value,
                            Resource::Graph ctx)
 {
 	// Erase existing property in this context
 	for (Properties::iterator i = _properties.find(uri);
-	     (i != _properties.end()) && (i->first == uri);
-	     ++i) {
+	     (i != _properties.end()) && (i->first == uri);) {
+		Properties::iterator next = i;
+		++next;
 		if (i->second.context() == ctx && i->second == value) {
 			_properties.erase(i);
 		}
+		i = next;
 	}
 
 	// Insert new property
@@ -84,7 +86,7 @@ ResourceImpl::has_property(const Raul::URI& uri, const Raul::Atom& value) const
 	return false;
 }
 
-Raul::Atom&
+const Raul::Atom&
 ResourceImpl::set_property(const Raul::URI& uri, const Raul::Atom& value) const
 {
 	return const_cast<ResourceImpl*>(this)->set_property(uri, value);
diff --git a/src/shared/ResourceImpl.hpp b/src/shared/ResourceImpl.hpp
index 6afc567d..0d96d840 100644
--- a/src/shared/ResourceImpl.hpp
+++ b/src/shared/ResourceImpl.hpp
@@ -46,7 +46,7 @@ public:
 	Properties properties(Resource::Graph ctx) const;
 
 	const Raul::Atom& get_property(const Raul::URI& uri) const;
-	Raul::Atom&       set_property(const Raul::URI& uri, const Raul::Atom& value,
+	const Raul::Atom& set_property(const Raul::URI& uri, const Raul::Atom& value,
 	                               Resource::Graph ctx=Resource::DEFAULT);
 	void              remove_property(const Raul::URI& uri, const Raul::Atom& value);
 	bool              has_property(const Raul::URI& uri, const Raul::Atom& value) const;
@@ -69,7 +69,7 @@ public:
 			bool& port, bool& is_output, PortType& data_type);
 
 protected:
-	Raul::Atom& set_property(const Raul::URI& uri, const Raul::Atom& value) const;
+	const Raul::Atom& set_property(const Raul::URI& uri, const Raul::Atom& value) const;
 
 	LV2URIMap& _uris;
 
diff --git a/src/shared/World.cpp b/src/shared/World.cpp
index c583f2fa..eb60a1a5 100644
--- a/src/shared/World.cpp
+++ b/src/shared/World.cpp
@@ -210,7 +210,7 @@ SharedPtr<LV2URIMap> World::uris()      { return _impl->uris; }
 
 /** Load an Ingen module.
  * @return true on success, false on failure
-m */
+ */
 bool
 World::load_module(const char* name)
 {
@@ -228,6 +228,19 @@ World::load_module(const char* name)
 	}
 }
 
+bool
+World::run_module(const char* name)
+{
+	Pimpl::Modules::iterator i = _impl->modules.find(name);
+	if (i == _impl->modules.end()) {
+		LOG(error) << "Attempt to run unloaded module `" << name << "'" << endl;
+		return false;
+	}
+
+	i->second->run(this);
+	return true;
+}
+	
 /** Unload all loaded Ingen modules.
  */
 void
diff --git a/src/shared/World.hpp b/src/shared/World.hpp
index 6aacea36..8b0a65da 100644
--- a/src/shared/World.hpp
+++ b/src/shared/World.hpp
@@ -60,6 +60,8 @@ public:
 	virtual ~World();
 
 	virtual bool load_module(const char* name);
+	virtual bool run_module(const char* name);
+
 	virtual void unload_modules();
 
 	typedef SharedPtr<ServerInterface> (*InterfaceFactory)(