From 575ff61fa6d2b84f2c0513d28d670763cb1c41dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C5=8Dshin?= <git@wholezero.org>
Date: Fri, 21 Jan 2022 18:48:05 +0000
Subject: [PATCH] khan: vane skeleton

---
 pkg/arvo/sys/arvo.hoon      |  1 +
 pkg/arvo/sys/lull.hoon      | 20 ++++++++++++++
 pkg/arvo/sys/vane/khan.hoon | 54 +++++++++++++++++++++++++++++++++++++
 3 files changed, 75 insertions(+)
 create mode 100644 pkg/arvo/sys/vane/khan.hoon

diff --git a/pkg/arvo/sys/arvo.hoon b/pkg/arvo/sys/arvo.hoon
index 3c85edda6c..56afbbd65f 100644
--- a/pkg/arvo/sys/arvo.hoon
+++ b/pkg/arvo/sys/arvo.hoon
@@ -1678,6 +1678,7 @@
     %g  %gall
     %i  %iris
     %j  %jael
+    %k  %khan
   ==
 --  =>
 ::
diff --git a/pkg/arvo/sys/lull.hoon b/pkg/arvo/sys/lull.hoon
index cef2295a14..50a857a99f 100644
--- a/pkg/arvo/sys/lull.hoon
+++ b/pkg/arvo/sys/lull.hoon
@@ -2092,6 +2092,22 @@
     +$  oath  @                                         ::  signature
     --  ::  pki
   --  ::  jael
+::                                                      ::::
+::::                    ++khan                          ::  (1i) threads
+  ::                                                    ::::
+++  khan  ^?
+  |%
+  +$  gift                                              ::  out result <-$
+    $%  [%avow ~]
+    ==
+  +$  task                                              ::  in request ->$
+    $~  [%vega ~]
+    $%  $>(%born vane-task)                             ::  new unix process
+        [%fyrd ~]
+        $>(%trim vane-task)                             ::  trim state
+        $>(%vega vane-task)                             ::  report upgrade
+    ==
+  --  ::  khan
 ::
 +$  gift-arvo                                           ::  out result <-$
   $~  [%doze ~]
@@ -2103,6 +2119,7 @@
       gift:gall
       gift:iris
       gift:jael
+      gift:khan
   ==
 +$  task-arvo                                           ::  in request ->$
   $%  task:ames
@@ -2113,6 +2130,7 @@
       task:gall
       task:iris
       task:jael
+      task:khan
   ==
 +$  note-arvo                                           ::  out request $->
   $~  [%b %wake ~]
@@ -2124,6 +2142,7 @@
       [%g task:gall]
       [%i task:iris]
       [%j task:jael]
+      [%k task:khan]
       [%$ %whiz ~]
       [@tas %meta vase]
   ==
@@ -2145,6 +2164,7 @@
       [%gall gift:gall]
       [%iris gift:iris]
       [%jael gift:jael]
+      [%khan gift:khan]
   ==
 ::  $unix-task: input from unix
 ::
diff --git a/pkg/arvo/sys/vane/khan.hoon b/pkg/arvo/sys/vane/khan.hoon
new file mode 100644
index 0000000000..52ceab7f9c
--- /dev/null
+++ b/pkg/arvo/sys/vane/khan.hoon
@@ -0,0 +1,54 @@
+::  %khan, thread runner
+!:
+!?  164
+::
+|=  our=ship
+=>  |%
+    +$  move  [p=duct q=(wite note gift:khan)]
+    +$  note                                            ::  out request $->
+      !!
+    +$  sign                                            ::  in response $<-
+      !!
+    +$  khan-state
+      $:  %0
+          unix-duct=duct
+      ==
+    --
+=|  khan-state
+=*  state  -
+|=  [now=@da eny=@uvJ rof=roof]
+=*  khan-gate  .
+^?
+|%
+::  +call: handle a +task:khan request
+::
+++  call
+  |=  $:  hen=duct
+          dud=(unit goof)
+          wrapped-task=(hobo task:khan)
+      ==
+  ^-  [(list move) _khan-gate]
+  ::
+  =/  =task:khan  ((harden task:khan) wrapped-task)
+  [~ khan-gate]
+::  +load: migrate an old state to a new khan version
+::
+++  load
+  |=  old=khan-state
+  ^+  khan-gate
+  khan-gate(state old)
+::  +scry: view khan state
+::
+++  scry
+  ^-  roon
+  |=  [lyc=gang car=term bem=beam]
+  ^-  (unit (unit cage))
+  ~
+++  stay  state
+++  take
+  |=  [tea=wire hen=duct dud=(unit goof) hin=sign]
+  ^-  [(list move) _khan-gate]
+  ?^  dud
+    ~|(%khan-take-dud (mean tang.u.dud))
+  [~ khan-gate]
+--