svm vcl: allow random offsets for fifo segments in apps

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I1658a9c19d8eae4c9a42c0a111d4ad343b8eb8a4

1 files changed, 15 insertions, 2 deletions

diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h
index 195869a25dd..8266690d4ed 100644
--- a/src/svm/fifo_segment.h
+++ b/src/svm/fifo_segment.h
@@ -104,6 +104,18 @@ fifo_segment_t *fifo_segment_get_segment (fifo_segment_main_t * sm,
 u32 fifo_segment_index (fifo_segment_main_t * sm, fifo_segment_t * fs);
 void fifo_segment_info (fifo_segment_t * seg, char **address, size_t * size);
 
+always_inline void *
+fifo_segment_ptr (fifo_segment_t *fs, uword offset)
+{
+  return (void *) ((u8 *) fs->h + offset);
+}
+
+always_inline uword
+fifo_segment_offset (fifo_segment_t *fs, void *p)
+{
+  return (uword) ((u8 *) p - (u8 *) fs->h);
+}
+
 /**
  * Allocate fifo in fifo segment
  *
@@ -116,8 +128,8 @@ svm_fifo_t *fifo_segment_alloc_fifo_w_slice (fifo_segment_t * fs,
 					     u32 slice_index,
 					     u32 data_bytes,
 					     fifo_segment_ftype_t ftype);
-svm_fifo_t *fifo_segment_alloc_fifo_w_shared (fifo_segment_t *fs,
-					      svm_fifo_shared_t *sf);
+svm_fifo_t *fifo_segment_alloc_fifo_w_offset (fifo_segment_t *fs,
+					      uword offset);
 
 /**
  * Free fifo allocated in fifo segment
@@ -130,6 +142,7 @@ void fifo_segment_free_fifo (fifo_segment_t * fs, svm_fifo_t * f);
 void fifo_segment_detach_fifo (fifo_segment_t * fs, svm_fifo_t * f);
 void fifo_segment_attach_fifo (fifo_segment_t * fs, svm_fifo_t * f,
 			       u32 slice_index);
+uword fifo_segment_fifo_offset (svm_fifo_t *f);
 
 /**
  * Allocate message queue on segment