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.

2 files changed, 2 insertions, 4 deletions

diff --git a/console-client/kbd-repeat.c b/console-client/kbd-repeat.c
index 4bf9268e..b9000b22 100644
--- a/console-client/kbd-repeat.c
+++ b/console-client/kbd-repeat.c
@@ -81,6 +81,7 @@ kbd_repeat_key (kd_event *key)
   memcpy (ev, key, sizeof (kd_event));
   
   condition_broadcast (&kbdbuf.readcond);
+  condition_broadcast (&select_alert);
   mutex_unlock (&global_lock);
 }
 
@@ -231,9 +232,7 @@ kbd_setrepeater (const char *nodename, consnode_t *cn)
 
   condition_init (&kbdbuf.readcond);
   condition_init (&kbdbuf.writecond);
-
   condition_init (&select_alert);
-  condition_implies (&kbdbuf.readcond, &select_alert);
   
   console_register_consnode (*cn);
   
diff --git a/console-client/pc-mouse.c b/console-client/pc-mouse.c
index cf8987bf..8a9009fb 100644
--- a/console-client/pc-mouse.c
+++ b/console-client/pc-mouse.c
@@ -105,6 +105,7 @@ repeat_event (kd_event *evt)
   memcpy (ev, evt, sizeof (kd_event));
   
   condition_broadcast (&mousebuf.readcond);
+  condition_broadcast (&select_alert);
   mutex_unlock (&global_lock);
 }
 
@@ -499,9 +500,7 @@ setrepeater (const char *nodename)
   
   condition_init (&mousebuf.readcond);
   condition_init (&mousebuf.writecond);
-  
   condition_init (&select_alert);
-  condition_implies (&mousebuf.readcond, &select_alert);
   
   console_register_consnode (cnode);