mirror of
https://github.com/osmarks/random-stuff
synced 2024-10-31 19:06:15 +00:00
159 lines
3.8 KiB
Scheme
159 lines
3.8 KiB
Scheme
|
;; prisond.scm: iterated prisoner's dilemma simulation
|
||
|
;; by matt
|
||
|
;; this program is in the public domain
|
||
|
|
||
|
(define strategies '())
|
||
|
|
||
|
(define add-strategy
|
||
|
(lambda (x y)
|
||
|
(set! strategies (cons (cons x y) strategies))))
|
||
|
|
||
|
(define angel
|
||
|
(lambda (x y) 0))
|
||
|
|
||
|
(define devil
|
||
|
(lambda (x y) 1))
|
||
|
|
||
|
(define tat-for-tit
|
||
|
(lambda (x y)
|
||
|
(if (null? x)
|
||
|
1
|
||
|
(if (= (car x) 0)
|
||
|
1
|
||
|
0))))
|
||
|
|
||
|
(define tit-for-tat
|
||
|
(lambda (x y)
|
||
|
(if (null? x)
|
||
|
0
|
||
|
(car x))))
|
||
|
|
||
|
(define time-machine
|
||
|
(lambda (x y)
|
||
|
(if (> 3 (length x))
|
||
|
0
|
||
|
(caddr x))))
|
||
|
|
||
|
(define random-choice
|
||
|
(lambda (x y)
|
||
|
(random 2)))
|
||
|
|
||
|
(define grudger
|
||
|
(lambda (x y)
|
||
|
(if (memq 1 x)
|
||
|
1
|
||
|
0)))
|
||
|
|
||
|
(define angry-tit-for-tat
|
||
|
(lambda (x y)
|
||
|
(if (null? x)
|
||
|
1
|
||
|
(car x))))
|
||
|
|
||
|
(define apl
|
||
|
(lambda (x y)
|
||
|
(if (null? x)
|
||
|
1
|
||
|
(if (= ( car y) 0)
|
||
|
1
|
||
|
0))))
|
||
|
|
||
|
(load-shared-object "/usr/lib/libc.so.6")
|
||
|
(define fork (foreign-procedure #f "fork" () unsigned))
|
||
|
;(define waitpid (foreign-procedure #f "waitpid" (unsigned uptr unsigned) integer-32))
|
||
|
(define wait (foreign-procedure #f "wait" (uptr) integer-32))
|
||
|
(define mmap (foreign-procedure #f "mmap" (uptr unsigned integer-32 integer-32 integer-32 unsigned) uptr))
|
||
|
(define shmem (mmap 0 8 3 33 -1 0))
|
||
|
|
||
|
(define tt-run
|
||
|
(lambda (pid)
|
||
|
(if (> pid 0) (begin
|
||
|
(wait 0)
|
||
|
(foreign-ref 'integer-64 shmem 0)
|
||
|
) 'temporary-timeline)))
|
||
|
(define tt-send (lambda (x) (begin
|
||
|
(foreign-set! 'integer-64 shmem 0 3)
|
||
|
(exit))))
|
||
|
(define tt-recv (lambda () (tt-run (fork))))
|
||
|
|
||
|
(set! strategized 0)
|
||
|
(set! running 0)
|
||
|
(define apiomemetics
|
||
|
(lambda (x y)
|
||
|
(if (null? x)
|
||
|
(if (= running 0) (let ((ttr (tt-recv))) (if (eq? ttr 'temporary-timeline)
|
||
|
(begin (set! running 1) (display "temporary TL\n") 0)
|
||
|
(begin (set! running 1) (display "primary TL, got result ") (display ttr) (newline) (set! strategized 1) 0))) 0)
|
||
|
(if (= (length x) 99)
|
||
|
(if (= strategized 0) (begin
|
||
|
(display "end of game, reversing\n")
|
||
|
(tt-send 3)
|
||
|
) (begin
|
||
|
(set! running 0)
|
||
|
(display "end of game in primary\n")
|
||
|
0
|
||
|
))
|
||
|
(car x)))))
|
||
|
|
||
|
(define prisond
|
||
|
(lambda (x y)
|
||
|
(if (= x y)
|
||
|
(if (= x 1)
|
||
|
'(-2 -2)
|
||
|
'(-1 -1))
|
||
|
(if (= x 1)
|
||
|
'(0 -3)
|
||
|
'(-3 0)))))
|
||
|
|
||
|
(define iter-prisond
|
||
|
(lambda (x y z)
|
||
|
(define scores '(0 0))
|
||
|
(define moves-x '())
|
||
|
(define moves-y '())
|
||
|
(define current-moves '())
|
||
|
(define helper
|
||
|
(lambda (x y z)
|
||
|
(if (= z 0)
|
||
|
scores
|
||
|
(begin
|
||
|
(set! current-moves (list (x moves-x moves-y) (y moves-y moves-x)))
|
||
|
(set! moves-x (cons (cadr current-moves) moves-x))
|
||
|
(set! moves-y (cons (car current-moves) moves-y))
|
||
|
(set! scores (map + scores (prisond (car current-moves) (cadr current-moves))))
|
||
|
(helper x y (- z 1)))))) (helper x y z)))
|
||
|
|
||
|
(define get-strategy-scores
|
||
|
(lambda (x)
|
||
|
(define score 0)
|
||
|
(define helper
|
||
|
(lambda (y)
|
||
|
(if (eqv? (car x) (car y))
|
||
|
0
|
||
|
(set! score (+ score (car (iter-prisond (cdr x) (cdr y) 100)))))))
|
||
|
(map helper strategies)
|
||
|
score))
|
||
|
|
||
|
(define get-all-scores
|
||
|
(lambda ()
|
||
|
(define helper
|
||
|
(lambda (x)
|
||
|
(write (list (car x) (get-strategy-scores x)))
|
||
|
(newline)))
|
||
|
(map helper strategies)))
|
||
|
|
||
|
(add-strategy 'angel angel)
|
||
|
(add-strategy 'devil devil)
|
||
|
(add-strategy 'tit-for-tat tit-for-tat)
|
||
|
(add-strategy 'tat-for-tit tat-for-tit)
|
||
|
(add-strategy 'time-machine time-machine)
|
||
|
(add-strategy 'random-choice random-choice)
|
||
|
(add-strategy 'grudger grudger)
|
||
|
(add-strategy 'angry-tit-for-tat angry-tit-for-tat)
|
||
|
(add-strategy 'apl apl)
|
||
|
(add-strategy 'apiomemetics apiomemetics)
|
||
|
|
||
|
(random-seed (time-second (current-time)))
|
||
|
|
||
|
(get-all-scores)
|
||
|
(exit)
|