api: API trace improvements

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

diff --git a/src/vppinfra/elog.c b/src/vppinfra/elog.c
index 6fa44cb..8ae752e 100644 (file)
--- a/src/vppinfra/elog.c
+++ b/src/vppinfra/elog.c
@@ -395,8 +395,8 @@ format_elog_event (u8 * s, va_list * va)
   return s;
 }
 
-u8 *
-format_elog_track_name (u8 * s, va_list * va)
+__clib_export u8 *
+format_elog_track_name (u8 *s, va_list *va)
 {
   elog_main_t *em = va_arg (*va, elog_main_t *);
   elog_event_t *e = va_arg (*va, elog_event_t *);
@@ -484,18 +484,29 @@ elog_nsec_per_clock (elog_main_t * em)
                                            &em->init_time));
 }
 
-__clib_export void
-elog_alloc (elog_main_t * em, u32 n_events)
+static void
+elog_alloc_internal (elog_main_t * em, u32 n_events, int free_ring)
 {
-  if (em->event_ring)
+  if (free_ring && em->event_ring)
     vec_free (em->event_ring);
 
   /* Ring size must be a power of 2. */
   em->event_ring_size = n_events = max_pow2 (n_events);
 
-  /* Leave an empty ievent at end so we can always speculatively write
-     and event there (possibly a long form event). */
-  vec_resize_aligned (em->event_ring, n_events, CLIB_CACHE_LINE_BYTES);
+  vec_validate_aligned (em->event_ring, n_events, CLIB_CACHE_LINE_BYTES);
+  _vec_len (em->event_ring) = n_events;
+}
+
+__clib_export void
+elog_alloc (elog_main_t * em, u32 n_events)
+{
+  elog_alloc_internal (em, n_events, 1 /* free ring */ );
+}
+
+__clib_export void
+elog_resize (elog_main_t * em, u32 n_events)
+{
+  elog_alloc_internal (em, n_events, 0 /* do not free ring */ );
 }
 
 __clib_export void
@@ -684,8 +695,8 @@ elog_cmp (void *a1, void *a2)
 /*
  * merge two event logs. Complicated and cranky.
  */
-void
-elog_merge (elog_main_t * dst, u8 * dst_tag, elog_main_t * src, u8 * src_tag,
+__clib_export void
+elog_merge (elog_main_t *dst, u8 *dst_tag, elog_main_t *src, u8 *src_tag,
            f64 align_tweak)
 {
   elog_event_t *e;
@@ -1132,8 +1143,8 @@ serialize_elog_main (serialize_main_t * m, va_list * va)
   vec_foreach (e, em->events) serialize (m, serialize_elog_event, em, e);
 }
 
-void
-unserialize_elog_main (serialize_main_t * m, va_list * va)
+__clib_export void
+unserialize_elog_main (serialize_main_t *m, va_list *va)
 {
   elog_main_t *em = va_arg (*va, elog_main_t *);
   uword i;