Author: luigi
Date: Sun Mar 11 17:35:12 2012
New Revision: 232824
URL: http://svn.freebsd.org/changeset/base/232824
Log:
- remove an extra parenthesis in a closing brace;
- add the macro NETMAP_RING_FIRST_RESERVED() which returns
the index of the first non-released buffer in the ring
(this is useful for code that retains buffers for some time
instead of processing them immediately)
Modified:
head/sys/net/netmap_user.h
Modified: head/sys/net/netmap_user.h
==============================================================================
--- head/sys/net/netmap_user.h Sun Mar 11 15:58:27 2012 (r232823)
+++ head/sys/net/netmap_user.h Sun Mar 11 17:35:12 2012 (r232824)
@@ -77,11 +77,16 @@
#define NETMAP_BUF_IDX(ring, buf) \
( ((char *)(buf) - ((char *)(ring) + (ring)->buf_ofs) ) / \
- (ring)->nr_buf_size) )
+ (ring)->nr_buf_size )
#define NETMAP_RING_NEXT(r, i) \
((i)+1 == (r)->num_slots ? 0 : (i) + 1 )
+#define NETMAP_RING_FIRST_RESERVED(r) \
+ ( (r)->cur < (r)->reserved ? \
+ (r)->cur + (r)->num_slots - (r)->reserved : \
+ (r)->cur - (r)->reserved )
+
/*
* Return 1 if the given tx ring is empty.
*/
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