Added event system for TDM termination alarms

libs/freetdm/src/ftdm_io.c

@@ -5653,6 +5653,12 @@ static void *ftdm_span_service_events(ftdm_thread_t *me, void *obj)
 	return NULL;
 }
 
+FT_DECLARE(ftdm_status_t) ftdm_span_register_signal_cb(ftdm_span_t *span, fio_signal_cb_t sig_cb)
+{
+	span->signal_cb = sig_cb;
+	return FTDM_SUCCESS;
+}
+
 FT_DECLARE(ftdm_status_t) ftdm_span_start(ftdm_span_t *span)
 {
 	ftdm_status_t status = FTDM_FAIL;
@@ -5670,7 +5676,8 @@ FT_DECLARE(ftdm_status_t) ftdm_span_start(ftdm_span_t *span)
 			goto done;
 		}
 
-		status = ftdm_report_initial_channels_alarms(span);
+		//ftdm_report_initial_channels_alarms(span);		
+		ftdm_set_flag_locked(span, FTDM_SPAN_STARTED);
 		goto done;
 	}
 
@@ -5872,8 +5879,10 @@ FT_DECLARE(ftdm_status_t) ftdm_group_create(ftdm_group_t **group, const char *na
 
 static ftdm_status_t ftdm_span_trigger_signal(const ftdm_span_t *span, ftdm_sigmsg_t *sigmsg)
 {
-	ftdm_status_t status = span->signal_cb(sigmsg);
-	return status;
+	if (!span->signal_cb) {
+		return FTDM_FAIL;
+	}
+	return span->signal_cb(sigmsg);
 }
 
 static ftdm_status_t ftdm_span_queue_signal(const ftdm_span_t *span, ftdm_sigmsg_t *sigmsg)

libs/freetdm/src/include/freetdm.h

@@ -1611,6 +1611,17 @@ FT_DECLARE(ftdm_status_t) ftdm_configure_span(ftdm_span_t *span, const char *typ
  */
 FT_DECLARE(ftdm_status_t) ftdm_configure_span_signaling(ftdm_span_t *span, const char *type, fio_signal_cb_t sig_cb, ftdm_conf_parameter_t *parameters);
 
+/*! 
+ * \brief Register callback to listen for incoming events
+ * \note  This function should only be used when there is no signalling module
+ * \param span The span to register to
+ * \param sig_cb The callback that the signaling stack will use to notify about events
+ *
+ * \retval FTDM_SUCCESS success
+ * \retval FTDM_FAIL failure
+ */
+FT_DECLARE(ftdm_status_t) ftdm_span_register_signal_cb(ftdm_span_t *span, fio_signal_cb_t sig_cb);
+
 /*! 
  * \brief Start the span signaling (must call ftdm_configure_span_signaling first)
  *
@@ -1626,7 +1637,6 @@ FT_DECLARE(ftdm_status_t) ftdm_configure_span_signaling(ftdm_span_t *span, const
  */
 FT_DECLARE(ftdm_status_t) ftdm_span_start(ftdm_span_t *span);
 
-
 /*! 
  * \brief Stop the span signaling (must call ftdm_span_start first)
  * \note certain signalings (boost signaling) does not support granular span start/stop