add a bit of state to VCAManager

libs/ardour/ardour/vca_manager.h

@@ -28,6 +28,7 @@
 #include <glibmm/threads.h>
 
 #include "pbd/signals.h"
+#include "pbd/statefuldestructible.h"
 
 #include "ardour/session_handle.h"
 #include "ardour/types.h"
@@ -36,7 +37,7 @@ namespace ARDOUR {
 
 class VCA;
 
-class VCAManager : public SessionHandleRef
+class VCAManager : public SessionHandleRef, public PBD::StatefulDestructible
 {
      public:
 	VCAManager (ARDOUR::Session&);
@@ -53,6 +54,11 @@ class VCAManager : public SessionHandleRef
 	PBD::Signal1<void,VCAList&> VCAAdded;
 	PBD::Signal1<void,VCAList&> VCARemoved;
 
+	XMLNode& get_state();
+	int set_state (XMLNode const&, int version);
+
+	static std::string xml_node_name;
+
      private:
 	mutable Glib::Threads::Mutex lock;
 	VCAS _vcas;

libs/ardour/vca_manager.cc

@@ -23,10 +23,13 @@
 #include "ardour/vca.h"
 #include "ardour/vca_manager.h"
 
+#include "i18n.h"
+
 using namespace ARDOUR;
 using namespace Glib::Threads;
 using std::string;
 
+string VCAManager::xml_node_name (X_("VCAManager"));
 
 VCAManager::VCAManager (Session& s)
 	: SessionHandleRef (s)
@@ -35,6 +38,8 @@ VCAManager::VCAManager (Session& s)
 
 VCAManager::~VCAManager ()
 {
+	Mutex::Lock lm (lock);
+	_vcas.clear ();
 }
 
 VCAManager::VCAS
@@ -102,3 +107,16 @@ VCAManager::vca_by_number (uint32_t n) const
 
 	return boost::shared_ptr<VCA>();
 }
+
+XMLNode&
+VCAManager::get_state ()
+{
+	XMLNode* node = new XMLNode (xml_node_name);
+	return *node;
+}
+
+int
+VCAManager::set_state (XMLNode const& node, int /*version*/)
+{
+	return 0;
+}