X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvppinfra%2Ftw_timer_template.c;h=97c70b223cee05f79c965ec8c623facbd547d2ca;hb=2ac41357bc15dce578f67d53c25f2de357185e71;hp=af2b75a0f57971aa644ea95e1b36565d93992dd6;hpb=90d28846f963a86d760b4a6b83aed62b862f1c61;p=vpp.git

diff --git a/src/vppinfra/tw_timer_template.c b/src/vppinfra/tw_timer_template.c
index af2b75a0f57..97c70b223ce 100644
--- a/src/vppinfra/tw_timer_template.c
+++ b/src/vppinfra/tw_timer_template.c
@@ -292,7 +292,7 @@ timer_add (TWT (tw_timer_wheel) * tw, TWT (tw_timer) * t, u64 interval)
  * @param u64 interval timer interval in ticks
  * @returns handle needed to cancel the timer
  */
-u32
+__clib_export u32
 TW (tw_timer_start) (TWT (tw_timer_wheel) * tw, u32 user_id, u32 timer_id,
 		     u64 interval)
 {
@@ -349,7 +349,7 @@ int TW (scan_for_handle) (TWT (tw_timer_wheel) * tw, u32 handle)
  * @param tw_timer_wheel_t * tw timer wheel object pointer
  * @param u32 handle timer cancellation returned by tw_timer_start
  */
-void TW (tw_timer_stop) (TWT (tw_timer_wheel) * tw, u32 handle)
+__clib_export void TW (tw_timer_stop) (TWT (tw_timer_wheel) * tw, u32 handle)
 {
   TWT (tw_timer) * t;
 
@@ -376,7 +376,8 @@ void TW (tw_timer_stop) (TWT (tw_timer_wheel) * tw, u32 handle)
   pool_put_index (tw->timers, handle);
 }
 
-int TW (tw_timer_handle_is_free) (TWT (tw_timer_wheel) * tw, u32 handle)
+__clib_export int
+TW (tw_timer_handle_is_free) (TWT (tw_timer_wheel) * tw, u32 handle)
 {
   return pool_is_free_index (tw->timers, handle);
 }
@@ -387,8 +388,8 @@ int TW (tw_timer_handle_is_free) (TWT (tw_timer_wheel) * tw, u32 handle)
  * @param u32 handle timer returned by tw_timer_start
  * @param u32 interval timer interval in ticks
  */
-void TW (tw_timer_update) (TWT (tw_timer_wheel) * tw, u32 handle,
-			   u64 interval)
+__clib_export void
+TW (tw_timer_update) (TWT (tw_timer_wheel) * tw, u32 handle, u64 interval)
 {
   TWT (tw_timer) * t;
   t = pool_elt_at_index (tw->timers, handle);
@@ -403,7 +404,7 @@ void TW (tw_timer_update) (TWT (tw_timer_wheel) * tw, u32 handle,
  *   expired timer handles. The callback is optional.
  * @param f64 timer_interval_in_seconds
  */
-void
+__clib_export void
 TW (tw_timer_wheel_init) (TWT (tw_timer_wheel) * tw,
 			  void *expired_timer_callback,
 			  f64 timer_interval_in_seconds, u32 max_expirations)
@@ -450,7 +451,7 @@ TW (tw_timer_wheel_init) (TWT (tw_timer_wheel) * tw,
  * @brief Free a tw timer wheel template instance
  * @param tw_timer_wheel_t * tw timer wheel object pointer
  */
-void TW (tw_timer_wheel_free) (TWT (tw_timer_wheel) * tw)
+__clib_export void TW (tw_timer_wheel_free) (TWT (tw_timer_wheel) * tw)
 {
   int i, j;
   tw_timer_wheel_slot_t *ts;
@@ -513,7 +514,7 @@ static inline
   u32 slow_wheel_index __attribute__ ((unused));
   u32 glacier_wheel_index __attribute__ ((unused));
 
-  /* Shouldn't happen */
+  /* Called too soon to process new timer expirations? */
   if (PREDICT_FALSE (now < tw->next_run_time))
     return callback_vector_arg;
 
@@ -525,6 +526,14 @@ static inline
   /* Remember when we ran, compute next runtime */
   tw->next_run_time = (now + tw->timer_interval);
 
+  /* First call, or time jumped backwards? */
+  if (PREDICT_FALSE
+      ((tw->last_run_time == 0.0) || (now <= tw->last_run_time)))
+    {
+      tw->last_run_time = now;
+      return callback_vector_arg;
+    }
+
   if (callback_vector_arg == 0)
     {
       _vec_len (tw->expired_timer_handles) = 0;
@@ -802,13 +811,14 @@ static inline
   return callback_vector;
 }
 
-u32 *TW (tw_timer_expire_timers) (TWT (tw_timer_wheel) * tw, f64 now)
+__clib_export u32 *TW (tw_timer_expire_timers) (TWT (tw_timer_wheel) * tw,
+						f64 now)
 {
   return TW (tw_timer_expire_timers_internal) (tw, now, 0 /* no vector */ );
 }
 
-u32 *TW (tw_timer_expire_timers_vec) (TWT (tw_timer_wheel) * tw, f64 now,
-				      u32 * vec)
+__clib_export u32 *TW (tw_timer_expire_timers_vec) (TWT (tw_timer_wheel) * tw,
+						    f64 now, u32 * vec)
 {
   return TW (tw_timer_expire_timers_internal) (tw, now, vec);
 }
@@ -821,7 +831,8 @@ u32 *TW (tw_timer_expire_timers_vec) (TWT (tw_timer_wheel) * tw, f64 now,
  * when timers are removed from fast wheel slots.
  */
 
-u32 TW (tw_timer_first_expires_in_ticks) (TWT (tw_timer_wheel) * tw)
+__clib_export u32
+TW (tw_timer_first_expires_in_ticks) (TWT (tw_timer_wheel) * tw)
 {
   u32 first_expiring_index, fast_ring_index;
   i32 delta;