save+restore ID counter; fix buglet introduced with ID's when saving region state

git-svn-id: svn://localhost/ardour2/trunk@672 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/audioregion.cc

@@ -655,7 +655,7 @@ AudioRegion::state (bool full)
 
 	for (uint32_t n=0; n < sources.size(); ++n) {
 		snprintf (buf2, sizeof(buf2), "source-%d", n);
-		sources[n]->id().print (buf2);
+		sources[n]->id().print (buf);
 		node.add_property (buf2, buf);
 	}
 

libs/ardour/globals.cc

@@ -195,6 +195,8 @@ ARDOUR::init (AudioEngine& engine, bool use_vst, bool try_optimization)
 
 	(void) bindtextdomain(PACKAGE, LOCALEDIR);
 
+	ID::init ();
+
 	Config = new Configuration;
 
 	if (Config->load_state ()) {

libs/ardour/session_state.cc

@@ -1333,6 +1333,13 @@ Session::state(bool full_state)
 		}
 	}
 
+	/* save the ID counter */
+	
+	snprintf (buf, sizeof (buf), "%" PRIu64, ID::counter());
+	node->add_property ("id-counter", buf);
+
+	/* various options */
+
 	node->add_child_nocopy (get_options());
 
 	child = node->add_child ("Sources");
@@ -1502,6 +1509,21 @@ Session::set_state (const XMLNode& node)
 	if ((prop = node.property ("name")) != 0) {
 		_name = prop->value ();
 	}
+
+	if ((prop = node.property (X_("id-counter"))) != 0) {
+		uint64_t x;
+		sscanf (prop->value().c_str(), "%" PRIu64, &x);
+		ID::init_counter (x);
+	} else {
+		/* old sessions used a timebased counter, so fake
+		   the startup ID counter based on a standard
+		   timestamp.
+		*/
+		time_t now;
+		time (&now);
+		ID::init_counter (now);
+	}
+
 	
 	IO::disable_ports ();
 	IO::disable_connecting ();

libs/pbd/id.cc

@@ -12,12 +12,18 @@
 using namespace std;
 using namespace PBD;
 
-Glib::Mutex ID::counter_lock;
+Glib::Mutex* ID::counter_lock = 0;
 uint64_t ID::_counter = 0;
 
+void
+ID::init ()
+{
+	counter_lock = new Glib::Mutex;
+}
+
 ID::ID ()
 {
-	Glib::Mutex::Lock lm (counter_lock);
+	Glib::Mutex::Lock lm (*counter_lock);
 	id = _counter++;
 }
 

libs/pbd/pbd/id.h

@@ -31,12 +31,13 @@ class ID {
 	
 	static uint64_t counter() { return _counter; }
 	static void init_counter (uint64_t val) { _counter = val; }
+	static void init ();
 
   private:
 	uint64_t id;
 	int string_assign (std::string);
 
-	static Glib::Mutex counter_lock;
+	static Glib::Mutex* counter_lock;
 	static uint64_t _counter;
 };