MEDIUM: connection: make xprt->snd_buf() take the byte count in argument
This way the senders don't need to modify the buffer's metadata anymore
nor to know about the output's split point. This way the functions can
take a const buffer and it's clearer who's in charge of updating the
buffer after a send. That's why the buffer realignment is now performed
by the caller of the transport's snd_buf() functions.
The return type was updated to return a size_t to comply with the count
argument.
diff --git a/include/types/connection.h b/include/types/connection.h
index 3dab54e..6cd8a3a 100644
--- a/include/types/connection.h
+++ b/include/types/connection.h
@@ -269,7 +269,7 @@
*/
struct xprt_ops {
int (*rcv_buf)(struct connection *conn, struct buffer *buf, int count); /* recv callback */
- int (*snd_buf)(struct connection *conn, struct buffer *buf, int flags); /* send callback */
+ size_t (*snd_buf)(struct connection *conn, const struct buffer *buf, size_t count, int flags); /* send callback */
int (*rcv_pipe)(struct connection *conn, struct pipe *pipe, unsigned int count); /* recv-to-pipe callback */
int (*snd_pipe)(struct connection *conn, struct pipe *pipe); /* send-to-pipe callback */
void (*shutr)(struct connection *, int); /* shutr function */