1 ;;; 8sync --- Asynchronous programming for Guile
2 ;;; Copyright © 2016, 2017 Christopher Allan Webber <cwebber@dustycloud.org>
4 ;;; This file is part of 8sync.
6 ;;; 8sync is free software: you can redistribute it and/or modify it
7 ;;; under the terms of the GNU Lesser General Public License as
8 ;;; published by the Free Software Foundation, either version 3 of the
9 ;;; License, or (at your option) any later version.
11 ;;; 8sync is distributed in the hope that it will be useful,
12 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ;;; GNU Lesser General Public License for more details.
16 ;;; You should have received a copy of the GNU Lesser General Public
17 ;;; License along with 8sync. If not, see <http://www.gnu.org/licenses/>.
19 ;;; =====================================================================
20 ;;; Robot Scanner test demo (from XUDD, originally).
22 ;;; Here's the premise. There's a warehouse full of droids, some
23 ;;; infected, and some not. The SecurityRobot is being sent in to clean
24 ;;; up the mess. It's capable of sending a message that infected droids
25 ;;; are susceptible to responding in a predictable way. Once it has
26 ;;; identified that a droid is infected, it shoots it full of holes till
27 ;;; the droid is terminated. The SecurityRobot goes from room to room
28 ;;; till things are cleared out.
30 ;;; Overseeing the operation is the "overseer". The security robot keeps
31 ;;; the overseer up to date on its progress as it goes. (For this demo,
32 ;;; the overseer is also responsible for initializing the world and
33 ;;; reporting info back to the user.)
34 ;;; =====================================================================
36 (use-modules (8sync actors)
40 (set! *random-state* (random-state-from-platform))
42 (define room-structure
43 ;; A list of (clean-droids infected-droids)
50 (define-actor <overseer> (<actor>)
52 (lambda (actor message)
53 ;; Porting mostly straight up from super-imperative XUDD code.
54 (define previous-room #f)
55 (define first-room #f)
60 ((clean-droids infected-droids)
62 (define room (create-actor* actor <warehouse-room> "room"))
63 (define* (init-droid #:key infected)
64 (define droid (create-actor* actor <droid> "droid"
67 (<-wait droid 'register-with-room))
70 ;; Couldn't this just be folded into the warehouse room init?
71 ;; I guess it stress tests more the message sending process
73 (<- previous-room 'set-next-room
75 (<- room 'set-previous-room
78 ;; Set up clean droids in the room
81 (init-droid #:infected #f))
84 ;; Set up infected droids in the room
87 (init-droid #:infected #t))
90 (set! previous-room room)
92 (set! first-room room))))
97 (create-actor actor <security-robot>)))
98 (<- security-robot 'begin-mission
99 #:starting-room first-room
100 #:overseer (actor-id actor)))))
103 (lambda* (actor message #:key text)
108 ;;; A room full of robots.
109 (define-class <warehouse-room> (<actor>)
110 (droids #:init-value '())
111 (next-room #:init-value #f)
112 (previous-room #:init-value #f)
115 #:allocation #:each-subclass
119 (lambda* (actor message #:key id)
120 "Set the room following this"
121 (slot-set! actor 'next-room id)))
124 (lambda* (actor message #:key id)
125 "Set the room previous to this"
126 (slot-set! actor 'previous-room id)))
129 (lambda (actor message)
130 "Return a reference to the link following this"
131 (<-reply message (slot-ref actor 'next-room))))
134 (lambda (actor message)
135 "Return a reference to the link preceding this"
136 (<-reply message (slot-ref actor 'previous-room))))
139 (lambda (actor message)
140 "Return a list of all the droid ids we know of in this room"
142 #:droid-ids (slot-ref actor 'droids))))
145 (lambda* (actor message #:key droid-id)
146 "Register a droid as being in this room"
147 (slot-set! actor 'droids
149 (slot-ref actor 'droids))))))))
152 ;;; A droid that may or may not be infected!
153 ;;; What will happen? Stay tuned!
154 (define-class <droid> (<actor>)
155 (infected #:init-keyword #:infected)
156 (room #:init-keyword #:room)
160 #:allocation #:each-subclass
164 (lambda (actor message)
165 "Register ourselves as being in a room"
166 (let ((room-id (slot-ref actor 'room)))
167 (<-wait room-id 'register-droid
168 #:droid-id (actor-id actor))
169 (format #t "Droid ~a registered with room ~a\n"
170 (actor-id-actor actor)
171 (address-actor-id room-id)))))
174 (lambda (actor message)
175 "Leak whether or not we're infected to a security droid"
176 (<-reply message (slot-ref actor 'infected))))
179 (lambda (actor message)
180 "Get shot by bullets"
181 (let* ((damage (random 60))
182 (new-hp (- (slot-ref actor 'hp) damage))
183 (alive (> new-hp 0)))
184 ;; Set our health to the new value
185 (slot-set! actor 'hp new-hp)
188 #:damage-taken damage
191 (format #t "~a: *Kaboom!*\n" (actor-id-actor actor))
192 (self-destruct actor))))))))
195 (define (droid-status-format shot-response)
198 (lambda* (_ #:key alive damage-taken hp-left)
200 (format #f "Droid ~a shot; taken ~a damage. Still alive... ~a hp left."
201 (address-actor-id (message-from shot-response))
202 damage-taken hp-left)
203 (format #f "Droid ~a shot; taken ~a damage. Terminated."
204 (address-actor-id (message-from shot-response))
208 ;;; Security robot... designed to seek out and destroy infected droids.
209 (define-actor <security-robot> (<actor>)
210 ((begin-mission security-robot-begin-mission)))
212 (define* (security-robot-begin-mission actor message
213 #:key starting-room overseer)
214 ;; used to track the current room / if any rooms are remaining
215 (define room starting-room)
217 ;; Walk through all rooms, clearing out infected droids
218 ;; Continue this whil there's still another room to investigate.
221 (<- overseer 'transmission
222 #:text (format #f "Entering room ~a..."
223 (address-actor-id room)))
225 ;; Find all droids in this room and exterminate the infected ones.
226 (mbody-receive (_ #:key list-droids droid-ids #:allow-other-keys)
227 (<-wait room 'list-droids)
231 ;; Looks like it's infected
232 ((mbody-val (<-wait droid-id 'infection-expose))
233 ;; Inform that it's infected
234 (<- overseer 'transmission
235 #:text (format #f "~a found to be infected... taking out"
236 (address-actor-id droid-id)))
238 ;; Keep firing till it's dead.
239 (let ((still-alive #t))
241 (mbody-receive (response #:key alive #:allow-other-keys)
242 (<-wait droid-id 'get-shot)
243 (<- overseer 'transmission
244 #:text (droid-status-format response))
245 (set! still-alive alive)))))
247 ;; Not infected... inform and go to the next one
249 (<- overseer 'transmission
251 (format #f "~a is clean... moving on."
252 (address-actor-id droid-id))))))
255 ;; Switch to next room, if there is one.
256 (set! room (mbody-val (<-wait room 'get-next-room))))
258 ;; Good job everyone! Shut down the operation.
259 (<- overseer 'transmission
260 #:text "Mission accomplished."))
262 (define (main . args)
263 (define hive (make-hive))
264 (define overseer (bootstrap-actor hive <overseer>))
265 (define initial-messages
266 (list (bootstrap-message hive overseer 'init-world)))
267 (run-hive hive initial-messages))