ccan/io: remove IO_NEXT state.

It was only used for initial connections which hadn't started I/O.  Now
they are initialized with an io_plan, it can be eliminated.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/ccan/io/io.h b/ccan/io/io.h
index 24176f557ec6d4e6a60f5480029b1b5a22d1b5d0..5bbe42a4ab38648d826bc08fce9f137f7b97e00c 100644 (file)
--- a/ccan/io/io.h
+++ b/ccan/io/io.h
@@ -36,7 +36,6 @@ enum io_result {
 
 enum io_state {
        IO_IO,
-       IO_NEXT, /* eg starting, woken from idle, return from io_break. */
        IO_IDLE,
        IO_FINISHED
 };

diff --git a/ccan/io/poll.c b/ccan/io/poll.c
index f9221d1ff6d91fc398563def5d24d33ec626bdcf..da9107c2216a7b2234564ef4a915e523fbc62828 100644 (file)
--- a/ccan/io/poll.c
+++ b/ccan/io/poll.c
@@ -8,7 +8,7 @@
 #include <sys/socket.h>
 #include <limits.h>
 
-static size_t num_fds = 0, max_fds = 0, num_next = 0, num_finished = 0, num_waiting = 0;
+static size_t num_fds = 0, max_fds = 0, num_finished = 0, num_waiting = 0;
 static struct pollfd *pollfds = NULL;
 static struct fd **fds = NULL;
 static struct timers timeouts;
@@ -79,9 +79,7 @@ bool add_listener(struct io_listener *l)
 
 static void adjust_counts(enum io_state state)
 {
-       if (state == IO_NEXT)
-               num_next++;
-       else if (state == IO_FINISHED)
+       if (state == IO_FINISHED)
                num_finished++;
 }
 
@@ -122,6 +120,7 @@ bool add_duplex(struct io_conn *c)
 
 static void del_conn(struct io_conn *conn)
 {
+       assert(conn->plan.state == IO_FINISHED);
        if (conn->finish)
                conn->finish(conn, conn->finish_arg);
        if (timeout_active(conn))
@@ -133,10 +132,7 @@ static void del_conn(struct io_conn *conn)
                conn->duplex->duplex = NULL;
        } else
                del_fd(&conn->fd);
-       if (conn->plan.state == IO_FINISHED)
-               num_finished--;
-       else if (conn->plan.state == IO_NEXT)
-               num_next--;
+       num_finished--;
 }
 
 void del_listener(struct io_listener *l)
@@ -166,17 +162,16 @@ static void accept_conn(struct io_listener *l)
 }
 
 /* It's OK to miss some, as long as we make progress. */
-static void finish_and_next(bool finished_only)
+static void finish_conns(void)
 {
        unsigned int i;
 
        for (i = 0; !io_loop_return && i < num_fds; i++) {
                struct io_conn *c, *duplex;
 
-               if (!num_finished) {
-                       if (finished_only || num_next == 0)
-                               break;
-               }
+               if (!num_finished)
+                       break;
+
                if (fds[i]->listener)
                        continue;
                c = (void *)fds[i];
@@ -185,9 +180,6 @@ static void finish_and_next(bool finished_only)
                                del_conn(c);
                                free(c);
                                i--;
-                       } else if (!finished_only && c->plan.state == IO_NEXT) {
-                               backend_set_state(c, c->plan.next(c, c->plan.next_arg));
-                               num_next--;
                        }
                }
        }
@@ -247,8 +239,8 @@ void *io_loop(void)
                        }
                }
 
-               if (num_finished || num_next) {
-                       finish_and_next(false);
+               if (num_finished) {
+                       finish_conns();
                        /* Could have started/finished more. */
                        continue;
                }
@@ -299,7 +291,7 @@ void *io_loop(void)
        }
 
        while (num_finished)
-               finish_and_next(true);
+               finish_conns();
 
        ret = io_loop_return;
        io_loop_return = NULL;