From: Dan Dennedy <dan@dennedy.org>
Date: Thu, 2 Jan 2014 06:40:38 +0000 (-0800)
Subject: Let mlt_events_fire() return the number of listeners.
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=3ff21e23e4df8980059f0bec092473dd54409d8f;p=mlt

Let mlt_events_fire() return the number of listeners.

Callers can determine if there is a listener that overrides some
behavior.
---

diff --git a/src/framework/mlt_events.c b/src/framework/mlt_events.c
index 2a9f0153..7eff3df4 100644
--- a/src/framework/mlt_events.c
+++ b/src/framework/mlt_events.c
@@ -181,10 +181,12 @@ int mlt_events_register( mlt_properties self, const char *id, mlt_transmitter tr
  * \public \memberof mlt_events_struct
  * \param self a properties list
  * \param id the name of an event
+ * \return the number of listeners
  */
 
-void mlt_events_fire( mlt_properties self, const char *id, ... )
+int mlt_events_fire( mlt_properties self, const char *id, ... )
 {
+	int result = 0;
 	mlt_events events = mlt_events_fetch( self );
 	if ( events != NULL )
 	{
@@ -215,10 +217,12 @@ void mlt_events_fire( mlt_properties self, const char *id, ... )
 						transmitter( event->listener, event->owner, event->service, args );
 					else
 						event->listener( event->owner, event->service );
+					++result;
 				}
 			}
 		}
 	}
+	return result;
 }
 
 /** Register a listener.
diff --git a/src/framework/mlt_events.h b/src/framework/mlt_events.h
index 55bb18f4..832cd343 100644
--- a/src/framework/mlt_events.h
+++ b/src/framework/mlt_events.h
@@ -44,7 +44,7 @@ typedef void ( *mlt_listener )( );
 
 extern void mlt_events_init( mlt_properties self );
 extern int mlt_events_register( mlt_properties self, const char *id, mlt_transmitter transmitter );
-extern void mlt_events_fire( mlt_properties self, const char *id, ... );
+extern int mlt_events_fire( mlt_properties self, const char *id, ... );
 extern mlt_event mlt_events_listen( mlt_properties self, void *service, const char *id, mlt_listener listener );
 extern void mlt_events_block( mlt_properties self, void *service );
 extern void mlt_events_unblock( mlt_properties self, void *service );
diff --git a/src/mlt++/MltProperties.cpp b/src/mlt++/MltProperties.cpp
index 3da531a9..eb7d8674 100644
--- a/src/mlt++/MltProperties.cpp
+++ b/src/mlt++/MltProperties.cpp
@@ -102,9 +102,9 @@ void Properties::unblock( void *object )
 	mlt_events_unblock( get_properties( ), object != NULL ? object : get_properties( ) );
 }
 
-void Properties::fire_event( const char *event )
+int Properties::fire_event( const char *event )
 {
-	mlt_events_fire( get_properties( ), event, NULL );
+	return mlt_events_fire( get_properties( ), event, NULL );
 }
 
 bool Properties::is_valid( )
diff --git a/src/mlt++/MltProperties.h b/src/mlt++/MltProperties.h
index 6c5b8e87..9ccbcf9d 100644
--- a/src/mlt++/MltProperties.h
+++ b/src/mlt++/MltProperties.h
@@ -53,7 +53,7 @@ namespace Mlt
 			void unlock( );
 			void block( void *object = NULL );
 			void unblock( void *object = NULL );
-			void fire_event( const char *event );
+			int fire_event( const char *event );
 			bool is_valid( );
 			int count( );
 			char *get( const char *name );