Refactor select to reduce contention and hide internal implementation

details from consumers.

 - Track individual selecters on a per-descriptor basis such that there
   are no longer collisions and after sleeping for events only those
   descriptors which triggered events must be rescaned.
 - Protect the selinfo (per descriptor) structure with a mtx pool mutex.
   mtx pool mutexes were chosen to preserve api compatibility with
   existing code which does nothing but bzero() to setup selinfo
   structures.
 - Use a per-thread wait channel rather than a global wait channel.
 - Hide select implementation details in a seltd structure which is
   opaque to the rest of the kernel.
 - Provide a 'selsocket' interface for those kernel consumers who wish to
   select on a socket when they have no fd so they no longer have to
   be aware of select implementation details.

Tested by:	kris
Reviewed on:	arch

1 files changed, 0 insertions, 3 deletions

diff --git a/sys/netncp/ncp_sock.h b/sys/netncp/ncp_sock.h
index 7833760..a3998a4 100644
--- a/sys/netncp/ncp_sock.h
+++ b/sys/netncp/ncp_sock.h
@@ -45,9 +45,6 @@ int  ncp_sock_connect(struct ncp_conn *ncp);
 int  ncp_sock_recv(struct socket *so, struct mbuf **mp, int *rlen);
 int  ncp_sock_send(struct socket *so, struct mbuf *data, struct ncp_rq *rqp);
 int  ncp_sock_disconnect(struct ncp_conn *conn);
-int  ncp_poll(struct socket *so, int events);
-int  ncp_sock_rselect(struct socket *so, struct thread *td, struct timeval *tv,
-		      int events);
 int  ncp_sock_checksum(struct ncp_conn *conn, int enable);
 
 void ncp_check_rq(struct ncp_conn *conn);