various fixes related to lifetime management and xfades in particular. lots and lots and lots of debugging output, but sampo can test startup now. shutdown will still crash, but for a new reason.

git-svn-id: svn://localhost/ardour2/trunk@998 d708f5d6-7413-0410-9779-e7cbd77b26cf

8 files changed, 49 insertions, 15 deletions

diff --git a/libs/ardour/ardour/playlist.h b/libs/ardour/ardour/playlist.h
index 2d19f661c4..9cc3f86f0b 100644
--- a/libs/ardour/ardour/playlist.h
+++ b/libs/ardour/ardour/playlist.h
@@ -178,7 +178,7 @@ class Playlist : public PBD::StatefulDestructible {
 	bool             pending_length;
 	bool             save_on_thaw;
 	string           last_save_reason;
-	bool             in_set_state;
+	uint32_t         in_set_state;
 	bool            _hidden;
 	bool            _splicing;
 	bool            _nudging;
diff --git a/libs/ardour/audio_playlist.cc b/libs/ardour/audio_playlist.cc
index be8680882f..cce6e188f8 100644
--- a/libs/ardour/audio_playlist.cc
+++ b/libs/ardour/audio_playlist.cc
@@ -42,9 +42,9 @@ using namespace PBD;
 AudioPlaylist::AudioPlaylist (Session& session, const XMLNode& node, bool hidden)
 	: Playlist (session, node, hidden)
 {
-	in_set_state = true;
+	in_set_state++;
 	set_state (node);
-	in_set_state = false;
+	in_set_state--;
 
 	if (!hidden) {
 		PlaylistCreated (this); /* EMIT SIGNAL */
@@ -120,10 +120,24 @@ AudioPlaylist::~AudioPlaylist ()
 	/* drop connections to signals */
 
 	notify_callbacks ();
+	
+
+	cerr << "deleting crossfades "  << _crossfades.size() << endl;
+
+	for (Crossfades::iterator x = _crossfades.begin(); x != _crossfades.end(); ) {
+		Crossfades::iterator tmp;
+
+		tmp = x;
+		++tmp;
 
-	for (Crossfades::iterator x = _crossfades.begin(); x != _crossfades.end(); ++x) {
 		delete *x;
+
+		cerr << _crossfades.size() << " to go\n";
+
+		x = tmp;
 	}
+
+	cerr << "done\n";
 }
 
 struct RegionSortByLayer {
@@ -226,6 +240,10 @@ AudioPlaylist::remove_dependents (boost::shared_ptr<Region> region)
 {
 	Crossfades::iterator i, tmp;
 	boost::shared_ptr<AudioRegion> r = boost::dynamic_pointer_cast<AudioRegion> (region);
+
+	if (in_set_state) {
+		return;
+	}
 	
 	if (r == 0) {
 		fatal << _("programming error: non-audio Region passed to remove_overlap in audio playlist")
@@ -354,6 +372,8 @@ AudioPlaylist::check_dependents (boost::shared_ptr<Region> r, bool norefresh)
 		return;
 	}
 
+	cerr << "Check dependents of " << r->name() << endl;
+
 	if ((region = boost::dynamic_pointer_cast<AudioRegion> (r)) == 0) {
 		fatal << _("programming error: non-audio Region tested for overlap in audio playlist")
 		      << endmsg;
@@ -441,7 +461,10 @@ AudioPlaylist::add_crossfade (Crossfade& xfade)
 {
 	Crossfades::iterator ci;
 
+	cerr << "adding xfade involving " << xfade.in()->name() << " and " << xfade.out()->name() << endl;
+
 	for (ci = _crossfades.begin(); ci != _crossfades.end(); ++ci) {
+		cerr << "\tcompare to " << (*ci)->in()->name() << " and " << (*ci)->out()->name() << endl;
 		if (*(*ci) == xfade) { // Crossfade::operator==()
 			break;
 		}
@@ -488,6 +511,9 @@ AudioPlaylist::set_state (const XMLNode& node)
 	XMLNodeList nlist;
 	XMLNodeConstIterator niter;
 
+	in_set_state++;
+	freeze ();
+
 	Playlist::set_state (node);
 
 	nlist = node.children();
@@ -516,6 +542,9 @@ AudioPlaylist::set_state (const XMLNode& node)
 		}
 	}
 
+	thaw ();
+	in_set_state++;
+
 	return 0;
 }
 
diff --git a/libs/ardour/audioregion.cc b/libs/ardour/audioregion.cc
index d2cf279d3e..2f2c67ec50 100644
--- a/libs/ardour/audioregion.cc
+++ b/libs/ardour/audioregion.cc
@@ -306,6 +306,7 @@ AudioRegion::AudioRegion (SourceList& srcs, const XMLNode& node)
 
 AudioRegion::~AudioRegion ()
 {
+	cerr << "====== " << _name << " DESTRUCTOR @ " << this << endl;
 	notify_callbacks ();
 	GoingAway (); /* EMIT SIGNAL */
 }
diff --git a/libs/ardour/crossfade.cc b/libs/ardour/crossfade.cc
index 50e3ff2905..739ea1cc0e 100644
--- a/libs/ardour/crossfade.cc
+++ b/libs/ardour/crossfade.cc
@@ -197,7 +197,9 @@ Crossfade::Crossfade (const Crossfade &orig, boost::shared_ptr<AudioRegion> newi
 
 Crossfade::~Crossfade ()
 {
+	cerr << "Deleting xfade @ " << this << endl;
 	Invalidated (this);
+	cerr << "invalidation signal sent\n";
 }
 
 void
diff --git a/libs/ardour/playlist.cc b/libs/ardour/playlist.cc
index ef5fe276bb..87eed692b6 100644
--- a/libs/ardour/playlist.cc
+++ b/libs/ardour/playlist.cc
@@ -99,19 +99,19 @@ Playlist::Playlist (const Playlist& other, string namestr, bool hide)
 	RegionList tmp;
 	other.copy_regions (tmp);
 	
-	in_set_state = true;
+	in_set_state++;
 
 	for (list<boost::shared_ptr<Region> >::iterator x = tmp.begin(); x != tmp.end(); ++x) {
 		add_region_internal( (*x), (*x)->position() );
 	}
 
-	in_set_state = false;
+	in_set_state--;
 
 	_splicing  = other._splicing;
 	_nudging   = other._nudging;
 	_edit_mode = other._edit_mode;
 
-	in_set_state = false;
+	in_set_state = 0;
 	in_flush = false;
 	in_partition = false;
 	subcnt = 0;
@@ -230,7 +230,7 @@ Playlist::init (bool hide)
 	_hidden = hide;
 	_splicing = false;
 	_nudging = false;
-	in_set_state = false;
+	in_set_state = 0;
 	_edit_mode = Config->get_edit_mode();
 	in_flush = false;
 	in_partition = false;
@@ -1321,10 +1321,10 @@ Playlist::set_state (const XMLNode& node)
 	boost::shared_ptr<Region> region;
 	string region_name;
 
-	in_set_state = true;
+	in_set_state++;
 
 	if (node.name() != "Playlist") {
-		in_set_state = false;
+		in_set_state--;
 		return -1;
 	}
 
@@ -1394,10 +1394,10 @@ Playlist::set_state (const XMLNode& node)
 
 	notify_modified ();
 
-	in_set_state = false;
-
 	thaw ();
 
+	in_set_state--;
+
 	return 0;
 }
 
diff --git a/libs/ardour/region.cc b/libs/ardour/region.cc
index 6e6af0ee11..d49ed933c9 100644
--- a/libs/ardour/region.cc
+++ b/libs/ardour/region.cc
@@ -144,8 +144,6 @@ Region::Region (const XMLNode& node)
 
 Region::~Region ()
 {
-	// cerr << "====== " << _name << " DESTRUCTOR\n";
-	// stacktrace (cerr);
 	/* derived classes must call notify_callbacks() and then emit GoingAway */
 }
 
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index e4ff1941e0..66cb1f89fa 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -469,8 +469,9 @@ Session::~Session ()
 		tmp = i;
 		++tmp;
 
-		cerr << "dropping refs on an audio region (" << i->second->name() << ") with UC = " << i->second.use_count() << endl;
+		cerr << "dropping refs on an audio region (" << i->second->name() << " @ " << i->second << ") with UC = " << i->second.use_count() << endl;
 		i->second->drop_references ();
+		cerr << "AFTER: UC = " << i->second.use_count() << endl;
 
 		i = tmp;
 	}
diff --git a/libs/pbd/pbd/memento_command.h b/libs/pbd/pbd/memento_command.h
index 715e9d33e3..d42972d546 100644
--- a/libs/pbd/pbd/memento_command.h
+++ b/libs/pbd/pbd/memento_command.h
@@ -26,6 +26,7 @@ using std::cerr;
 using std::endl;
 
 #include <pbd/command.h>
+#include <pbd/stacktrace.h>
 #include <pbd/xml++.h>
 #include <sigc++/slot.h>
 #include <typeinfo>
@@ -36,6 +37,7 @@ using std::endl;
 */
 
 static void object_death (Command* mc) {
+	cerr << "\n\n\n---> OBJECT DEATH FIRED FOR " << mc << endl;
 	delete mc;
 }
 
@@ -53,6 +55,7 @@ class MementoCommand : public Command
                        XMLNode *after
                        ) 
             : obj(object), before(before), after(after) {
+		cerr << "MC @ " << this << " is a " << typeid (obj_T).name() << endl;
 		obj.GoingAway.connect (sigc::bind (sigc::ptr_fun (object_death), static_cast<Command*>(this)));
 	}