use new syntax for connecting to backend signals that enforces explicit connection scope, plus a few other related matters

git-svn-id: svn://localhost/ardour2/branches/3.0@6376 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 53 insertions, 0 deletions

diff --git a/libs/pbd/signals.cc b/libs/pbd/signals.cc
new file mode 100644
index 0000000000..62cabff091
--- /dev/null
+++ b/libs/pbd/signals.cc
@@ -0,0 +1,53 @@
+/*
+    Copyright (C) 2009 Paul Davis 
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include "pbd/signals.h"
+
+using namespace PBD;
+
+Glib::StaticMutex ScopedConnectionList::_lock = GLIBMM_STATIC_MUTEX_INIT;
+
+ScopedConnectionList::ScopedConnectionList()
+{
+}
+
+ScopedConnectionList::~ScopedConnectionList()
+{
+	drop_connections ();
+}
+
+void
+ScopedConnectionList::add_connection (const UnscopedConnection& c)
+{
+	Glib::Mutex::Lock lm (_lock);
+	_list.push_back (new ScopedConnection (c));
+}
+
+void
+ScopedConnectionList::drop_connections ()
+{
+	Glib::Mutex::Lock lm (_lock);
+
+	for (ConnectionList::iterator i = _list.begin(); i != _list.end(); ++i) {
+		delete *i;
+	}
+
+	_list.clear ();
+}
+