X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fsvm%2Fsvm_fifo.h;h=f32ef41da7da78477edeab38cc78a67866667417;hb=f03a59ab008908f98fd7d1b187a8c0fb78b01add;hp=9cb93ff414d61ebc907bf4898fc31401cd0c1e0f;hpb=328dbc886d7acd3491cff86a7a85176e511acf35;p=vpp.git

diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h
index 9cb93ff414d..f32ef41da7d 100644
--- a/src/svm/svm_fifo.h
+++ b/src/svm/svm_fifo.h
@@ -127,21 +127,37 @@ format_function_t format_svm_fifo;
 always_inline ooo_segment_t *
 svm_fifo_newest_ooo_segment (svm_fifo_t * f)
 {
-  return f->ooo_segments + f->ooos_newest;
+  if (f->ooos_newest == OOO_SEGMENT_INVALID_INDEX)
+    return 0;
+  return pool_elt_at_index (f->ooo_segments, f->ooos_newest);
+}
+
+always_inline u32
+ooo_segment_distance_to_tail (svm_fifo_t * f, u32 a)
+{
+  /* Ambiguous. Assumption is that ooo segments don't touch tail */
+  if (a == f->tail && f->tail == f->head)
+    return f->nitems;
+
+  return ((f->nitems + a - f->tail) % f->nitems);
 }
 
 always_inline u32
 ooo_segment_offset (svm_fifo_t * f, ooo_segment_t * s)
 {
-//  return ((f->nitems + s->fifo_position - f->tail) % f->nitems);
-  return s->start;
+  return ooo_segment_distance_to_tail (f, s->start);
 }
 
 always_inline u32
 ooo_segment_end_offset (svm_fifo_t * f, ooo_segment_t * s)
 {
-//  return ((f->nitems + s->fifo_position + s->length - f->tail) % f->nitems);
-  return s->start + s->length;
+  return ooo_segment_distance_to_tail (f, s->start) + s->length;
+}
+
+always_inline u32
+ooo_segment_length (svm_fifo_t * f, ooo_segment_t * s)
+{
+  return s->length;
 }
 
 always_inline ooo_segment_t *