vppinfra: initial RISC-V support

[vpp.git] / src / vppinfra / tw_timer_template.c

diff --git a/src/vppinfra/tw_timer_template.c b/src/vppinfra/tw_timer_template.c
index 11a3889..97c70b2 100644 (file)
--- 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)
@@ -421,7 +422,6 @@ TW (tw_timer_wheel_init) (TWT (tw_timer_wheel) * tw,
     }
   tw->timer_interval = timer_interval_in_seconds;
   tw->ticks_per_second = 1.0 / timer_interval_in_seconds;
-  tw->first_expires_tick = ~0ULL;
 
   vec_validate (tw->expired_timer_handles, 0);
   _vec_len (tw->expired_timer_handles) = 0;
@@ -451,7 +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;
@@ -476,7 +476,7 @@ void TW (tw_timer_wheel_free) (TWT (tw_timer_wheel) * tw)
        }
     }
 
-#if TW_OVERFLOW_VECVOR > 0
+#if TW_OVERFLOW_VECTOR > 0
   ts = &tw->overflow;
   head = pool_elt_at_index (tw->timers, ts->head_index);
   next_index = head->next;
@@ -514,7 +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;
 
@@ -526,6 +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;
@@ -803,13 +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);
 }
@@ -822,11 +831,24 @@ 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;
 
+#if TW_TIMER_WHEELS > 1
+  fast_ring_index = tw->current_index[TW_TIMER_RING_FAST];
+  if (fast_ring_index == TW_SLOTS_PER_RING)
+    return 1;
+
+  first_expiring_index = clib_bitmap_next_set (tw->fast_slot_bitmap,
+                                              fast_ring_index);
+  if (first_expiring_index == ~0)
+    first_expiring_index = TW_SLOTS_PER_RING;
+
+#else
+
   if (clib_bitmap_is_zero (tw->fast_slot_bitmap))
     return TW_SLOTS_PER_RING;
 
@@ -838,6 +860,7 @@ u32 TW (tw_timer_first_expires_in_ticks) (TWT (tw_timer_wheel) * tw)
                                               fast_ring_index);
   if (first_expiring_index == ~0 && fast_ring_index != 0)
     first_expiring_index = clib_bitmap_first_set (tw->fast_slot_bitmap);
+#endif
 
   ASSERT (first_expiring_index != ~0);