From 7b73d44a72ed33304da016672c8f243a585856fa Mon Sep 17 00:00:00 2001
From: Tim Vaughan <plugd@thelambdalab.xyz>
Date: Thu, 6 May 2021 12:11:54 +0200
Subject: [PATCH] Sleep is now the default actor behaviour.

---
 chat_client.scm | 17 ++++++-----------
 sam.scm         | 12 ++++--------
 world.scm       | 21 +++++++--------------
 3 files changed, 17 insertions(+), 33 deletions(-)

diff --git a/chat_client.scm b/chat_client.scm
index e12bc67..48736a8 100644
--- a/chat_client.scm
+++ b/chat_client.scm
@@ -24,15 +24,12 @@
                    (let loop ((recipients-left recipients))
                      (unless (null? recipients-left)
                        (send-message (car recipients-left) 'show-msg name str)
-                       (loop (cdr recipients-left))))))
-              (finally
-               'sleep))))
+                       (loop (cdr recipients-left)))))))))
                
 (define (make-receiver-beh system)
   (make-beh (self)
             (('show-msg from text) =>
-             (send-message system 'print from "> " text)
-             'sleep)))
+             (send-message system 'print from "> " text))))
             
 
 (define (make-client-beh system)
@@ -43,7 +40,8 @@
               (('start) =>
                (send-message system 'print "Welcome to chat!\n"
                              "Your client address is " (address->string receiver) ".\n"
-                             "Type '/help' for a list of commands.\n"))
+                             "Type '/help' for a list of commands.\n")
+               (send-message system 'read self))
               (((? string? str)) =>
                (if (string-prefix? "/" str)
                    (let* ((maybe-idx (string-index str #\space))
@@ -76,11 +74,8 @@
                         (send-message system 'shutdown))
                        (else
                         (send-message system 'print "Unrecognised command '" cmd "'"))))
-                   (send-message rollodex 'send name str)))
-
-              (finally
-               (send-message system 'read self)
-               'sleep))))
+                   (send-message rollodex 'send name str))
+               (send-message system 'read self)))))
 
 (define-beh main-beh (self)
   ((system) =>
diff --git a/sam.scm b/sam.scm
index a8ea67b..c40116d 100644
--- a/sam.scm
+++ b/sam.scm
@@ -58,8 +58,7 @@
 (define root-beh
   (make-beh : #f (self)
             (('ping recipient) =>
-             (send-message recipient 'pong)
-             'sleep)))
+             (send-message recipient 'pong))))
 
 ;; Actors
 
@@ -111,13 +110,12 @@
           (condition-case
               (match (apply (beh-proc beh) (cons address message))
                 ('done (hash-table-delete! actor-table id))
-                ('sleep 'do-nothing)
                 ('pass
                  (log-trace "Passing to parent behaviour...")
                  (loop (beh-parent beh)))
                 ((? procedure? new-beh) (hash-table-set! actor-table id new-beh))
                 (else
-                 (log-msg "Warning: behaviour of actor " id " returned invalid value.")))
+                 'do-nothing)) ; sleep is now the default
             (o (exn)
              (log-msg "Warning: actor " id " crashed evaluating message " (->stringrep message))
              (print-error-message o)))
@@ -230,15 +228,13 @@
    'done)
 
   (('print strings ...) =>
-   (apply print strings)
-   'sleep)
+   (apply print strings))
 
   (('read reader) =>
    (mutex-lock! reader-queue-mutex)
    (fifo-push reader-queue reader)
    (mutex-unlock! reader-available-mutex)
-   (mutex-unlock! reader-queue-mutex)
-   'sleep))
+   (mutex-unlock! reader-queue-mutex)))
 
 (define (boot-sam)
   (start-console)
diff --git a/world.scm b/world.scm
index 9dab1b1..7e95fe7 100644
--- a/world.scm
+++ b/world.scm
@@ -18,8 +18,7 @@
                       'done)
                      ((user) =>
                       (send-message login console 'user user)
-                      'done)))
-      'sleep)
+                      'done))))
      ((console 'user user) =>
       (send-message console 'print "password: ")
       (send-message console 'read
@@ -27,11 +26,9 @@
                      (self)
                      ((pass) =>
                       (send-message login console 'user user 'pass pass)
-                      'done)))
-      'sleep)
+                      'done))))
      ((console 'user user 'pass pass) =>
-      (send-message console 'print "Logged in user " user " with password " pass)
-      'sleep)
+      (send-message console 'print "Logged in user " user " with password " pass))
      ((console 'new-user) =>
       (send-message console 'print "What should I call your character?")
       (send-message console 'read
@@ -44,8 +41,7 @@
                                           "A character with that name already exists.")
                             (send-message login console 'new-user))
                           (send-message login console 'new-user user))
-                      'done)))
-      'sleep)
+                      'done))))
      ((console 'new-user user) =>
       (send-message console 'print "Please enter a good password/phrase:")
       (send-message console 'read
@@ -53,8 +49,7 @@
                      (self)
                      ((pass) =>
                       (send-message login console 'new-user user 'pass-confirm pass)
-                      'done)))
-      'sleep)
+                      'done))))
      ((console 'new-user user 'pass-confirm pass) =>
       (send-message console 'print "Please confirm your password:")
       (send-message console 'read
@@ -66,13 +61,11 @@
                           (begin
                             (send-message console 'print "Passwords do not match. Try again.")
                             (send-message login console 'new-user user)))
-                      'done)))
-      'sleep)
+                      'done))))
      ((console 'new-user user 'pass pass) =>
       (let ((player (make-actor (make-player-beh user))))
         (set! accounts (cons (list user pass player)))
-        (send-message console 'print "New account created!  Welcome!"))
-      'sleep))))
+        (send-message console 'print "New account created!  Welcome!"))))))
                     
 
 (define-beh main-beh (self)
-- 
2.20.1