add priority queue for events so important broadcasts like hold music can take precedenced over event-lock

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15865 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/private/switch_core_pvt.h

@@ -134,6 +134,7 @@ struct switch_core_session {
 	switch_queue_t *event_queue;
 	switch_queue_t *message_queue;
 	switch_queue_t *private_event_queue;
+	switch_queue_t *private_event_queue_pri;
 	switch_thread_rwlock_t *bug_rwlock;
 	switch_media_bug_t *bugs;
 	switch_app_log_t *app_log;

src/include/switch_core.h

@@ -986,9 +986,10 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_dequeue_event(_In_ switch_co
   \brief Queue a private event on a given session
   \param session the session to queue the message on
   \param event the event to queue
+  \param priority event has high priority
   \return the status returned by the message handler
 */
-SWITCH_DECLARE(switch_status_t) switch_core_session_queue_private_event(_In_ switch_core_session_t *session, _Inout_ switch_event_t **event);
+SWITCH_DECLARE(switch_status_t) switch_core_session_queue_private_event(_In_ switch_core_session_t *session, _Inout_ switch_event_t **event, switch_bool_t priority);
 
 
 /*! 

src/include/switch_types.h

@@ -326,7 +326,8 @@ typedef enum {
 	SMF_LOOP = (1 << 4),
 	SMF_HOLD_BLEG = (1 << 5),
 	SMF_IMMEDIATE = (1 << 6),
-	SMF_EXEC_INLINE = (1 << 7)
+	SMF_EXEC_INLINE = (1 << 7),
+	SMF_PRIORITY = (1 << 8)
 } switch_media_flag_enum_t;
 typedef uint32_t switch_media_flag_t;
 
@@ -919,6 +920,7 @@ typedef enum {
 	CF_UNICAST,
 	CF_VIDEO,
 	CF_EVENT_LOCK,
+	CF_EVENT_LOCK_PRI,
 	CF_RESET,
 	CF_ORIGINATING,
 	CF_STOP_BROADCAST,