Remove condition implications

There is no equivalent for these functions in libpthread. Instead of
adding them as non standard extensions, rework their use.

* console-client/kbd-repeat.c (kbd_repeat_key): Wake threads waiting on
select_alert.
(kbd_setrepeater): Remove call to condition_implies.
console-client/pc-mouse.c (repeat_event): Wake threads waiting on
select_alert.
(setrepeater):  Remove call to condition_implies.
* libpipe/pipe.c (pipe_create): Initialize the `pending_selects' member.
(pipe_add_select_cond): New function.
(pipe_remove_select_cond): Likewise.
(pipe_select_cond_broadcast): Likewise.
(_pipe_no_readers): Wake threads waiting on a pending select.
(_pipe_no_writers): Likewise.
(pipe_send): Likewise.
(pipe_recv): Likewise.
(pipe_pair_select): Replace condition implications by installing a pending
select on the pair of pipes.
* libpipe/pipe.h (struct pipe_select_cond): New type.
(struct pipe): New member `pending_selects'.
* pfinet/tunnel.c (tunnel_xmit): Wake threads waiting on tdev->select_alert.
(setup_tunnel_device): Remove call to condition_implies.
* term/devio.c (device_write_reply_inband): Wake threads waiting on
select_alert.
* term/hurdio.c (hurdio_writer_loop): Likewise.
* term/main.c (main): Remove calls to condition_implies.
* term/ptyio.c (ptyio_init): Remove calls to condition_implies, initialize
pty_select_alert.
(wake_reader): Wake threads waiting on pty_select_wakeup.
* term/term.h (pty_select_alert): New variable.
(clear_queue): Wake threads waiting on select_alert and, if acting on the
input queue, pty_select_alert, unless it's NULL.
(dequeue_quote): Likewise.
(enqueue_internal): Likewise.
(queue_erase): Likewise.
* trans/streamio.c (clear_buffer): Wake threads waiting on select_alert.
(buffer_read): Likewise.
(buffer_write): Likewise.
(device_read_reply_inband): Likewise.
(device_write_reply_inband): Likewise.
(main): Remove calls to condition_implies.

1 files changed, 2 insertions, 2 deletions

diff --git a/term/ptyio.c b/term/ptyio.c
index 9c1509ff..b02cda3f 100644
--- a/term/ptyio.c
+++ b/term/ptyio.c
@@ -58,8 +58,7 @@ static int nptyperopens = 0;
 static error_t
 ptyio_init (void)
 {
-  condition_implies (inputq->wait, &pty_select_wakeup);
-  condition_implies (&pty_read_wakeup, &pty_select_wakeup);
+  pty_select_alert = &pty_select_wakeup;
   return 0;
 }
 
@@ -132,6 +131,7 @@ wake_reader ()
     {
       pty_read_blocked = 0;
       condition_broadcast (&pty_read_wakeup);
+      condition_broadcast (&pty_select_wakeup);
     }
 }