Rename TYPE_DEBUG_PLAYER to TYPE_DEBUG_VIDEO_VIEW.

[dcpomatic.git] / src / lib / signal_manager.h

diff --git a/src/lib/signal_manager.h b/src/lib/signal_manager.h
index ae4306e3077ad51ed34f50b65da0bf8edcf461e1..6ba4a94560b50cd79783a8b5d3e414c344f2f5fe 100644 (file)
--- a/src/lib/signal_manager.h
+++ b/src/lib/signal_manager.h
@@ -1,35 +1,37 @@
 /*
     Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic 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,
+    DCP-o-matic 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.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
 #ifndef DCPOMATIC_SIGNAL_MANAGER_H
 #define DCPOMATIC_SIGNAL_MANAGER_H
 
-#include <boost/bind.hpp>
+#include "exception_store.h"
 #include <boost/asio.hpp>
 #include <boost/thread.hpp>
+#include <boost/noncopyable.hpp>
 
 class Signaller;
 
 /** A class to allow signals to be emitted from non-UI threads and handled
  *  by a UI thread.
  */
-class SignalManager : public boost::noncopyable
+class SignalManager : public boost::noncopyable, public ExceptionStore
 {
 public:
        /** Create a SignalManager.  Must be called from the UI thread */
@@ -39,16 +41,20 @@ public:
                _ui_thread = boost::this_thread::get_id ();
        }
 
+       virtual ~SignalManager () {}
+
        /* Do something next time the UI is idle */
        template <typename T>
        void when_idle (T f) {
                _service.post (f);
        }
 
-       /** Call this in the UI when it is idle */
+       /** Call this in the UI when it is idle.
+        *  @return Number of idle handlers that were executed.
+        */
        size_t ui_idle () {
-               /* This executes any functors that have been post()ed to _service */
-               return _service.poll ();
+               /* This executes one of the functors that has been post()ed to _service */
+               return _service.poll_one ();
        }
 
        /** This should wake the UI and make it call ui_idle() */
@@ -67,7 +73,11 @@ private:
        void emit (T f) {
                if (boost::this_thread::get_id() == _ui_thread) {
                        /* already in the UI thread */
-                       f ();
+                       try {
+                               f ();
+                       } catch (...) {
+                               store_current ();
+                       }
                } else {
                        /* non-UI thread; post to the service and wake up the UI */
                        _service.post (f);
@@ -76,7 +86,7 @@ private:
        }
 
        friend class Signaller;
-       
+
        /** A io_service which is used as the conduit for messages */
        boost::asio::io_service _service;
        /** Object required to keep io_service from stopping when it has nothing to do */