In preparation of merging projects/sendfile, transform bare access to

sb_cc member of struct sockbuf to a couple of inline functions:

sbavail() and sbused()

Right now they are equal, but once notion of "not ready socket buffer data",
will be checked in, they are going to be different.

Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.

1 files changed, 28 insertions, 0 deletions

diff --git a/sys/sys/sockbuf.h b/sys/sys/sockbuf.h
index ef80e9c..f9e8da4 100644
--- a/sys/sys/sockbuf.h
+++ b/sys/sys/sockbuf.h
@@ -166,6 +166,34 @@ int	sblock(struct sockbuf *sb, int flags);
 void	sbunlock(struct sockbuf *sb);
 
 /*
+ * Return how much data is available to be taken out of socket
+ * bufffer right now.
+ */
+static inline u_int
+sbavail(struct sockbuf *sb)
+{
+
+#if 0
+	SOCKBUF_LOCK_ASSERT(sb);
+#endif
+	return (sb->sb_cc);
+}
+
+/*
+ * Return how much data sits there in the socket buffer
+ * It might be that some data is not yet ready to be read.
+ */
+static inline u_int
+sbused(struct sockbuf *sb)
+{
+
+#if 0
+	SOCKBUF_LOCK_ASSERT(sb);
+#endif
+	return (sb->sb_cc);
+}
+
+/*
  * How much space is there in a socket buffer (so->so_snd or so->so_rcv)?
  * This is problematical if the fields are unsigned, as the space might
  * still be negative (cc > hiwat or mbcnt > mbmax).  Should detect