various fixes related to event scheduler.

server main loop is now just fd_poll()

overlay.c

@@ -169,17 +169,15 @@ int overlayServerMode()
       based on load/route table size etc) */
   fd_setalarm(overlay_route_tick,1000,1000);
 
-  while(1) {
-    
+  /* Start scheduling interface ticks */
+  fd_setalarm(overlay_check_ticks,1,500);
+
+  /* Keep an eye on VoMP calls so that we can expire stale ones etc */
+  fd_setalarm(vomp_tick,1000,1000);
+
+  while(1) {    
     /* Check for activitiy and respond to it */
     fd_poll();
-
-    /* Work out how long we can wait before we need to tick */
-    memabuseCheck();
-
-    vomp_tick();
-
-    overlay_check_ticks();
   }
 
   return 0;

overlay_interface.c

@@ -975,16 +975,10 @@ TIMING_CHECK();
 
 
 
-int
-overlay_check_ticks(void) {
+void overlay_check_ticks(void) {
   /* Check if any interface(s) are due for a tick */
   int i;
   
-  TIMING_CHECK();
-  /* Check for changes to interfaces */
-  overlay_interface_discover();
-  TIMING_CHECK();
-
   long long now = overlay_gettime_ms();
 
   /* Now check if the next tick time for the interfaces is no later than that time.
@@ -1011,6 +1005,9 @@ overlay_check_ticks(void) {
       TIMING_CHECK();	
     }
   
+  /* Update interval until next tick */
+  fd_setalarm(overlay_check_ticks,overlay_time_until_next_tick(),500);
+
   return 0;
 }
 

serval.h

@@ -827,7 +827,7 @@ int overlay_interface_init_socket(int i,struct sockaddr_in src_addr,struct socka
 void overlay_interface_discover();
 long long overlay_time_until_next_tick();
 int overlay_rx_messages();
-int overlay_check_ticks();
+void overlay_check_ticks();
 int overlay_add_selfannouncement();
 int overlay_frame_package_fmt1(overlay_frame *p,overlay_buffer *b);
 int overlay_interface_args(const char *arg);
@@ -1427,7 +1427,7 @@ int vomp_mdp_event(overlay_mdp_frame *mdp,
 int vomp_mdp_received(overlay_mdp_frame *mdp);
 char *vomp_describe_state(int state);
 char *vomp_describe_codec(int c);
-int vomp_tick();
+void vomp_tick();
 int vomp_tick_interval();
 int vomp_sample_size(int c);
 int vomp_codec_timespan(int c);

vomp.c

@@ -1457,7 +1457,7 @@ int app_vomp_monitor(int argc, const char *const *argv, struct command_line_opti
   return overlay_mdp_client_done();
 }
 
-int vomp_tick()
+void vomp_tick()
 {
   /* Send any reminder packets for call state, and also process any audio. */
   unsigned long long now=overlay_gettime_ms();