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8b5eb68238
They can be close()d explicitly with close-file-descriptor, and will close() on gc, but only explicitly closing the last port on them will close the fileno. Notably needed for network sockets where we open separate input and output ports on the same socket.
85 lines
2.9 KiB
Scheme
85 lines
2.9 KiB
Scheme
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; File: triangle.sch
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; Description: TRIANGLE benchmark
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; Author: Richard Gabriel
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; Created: 12-Apr-85
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; Modified: 12-Apr-85 10:30:32 (Bob Shaw)
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; 11-Aug-87 (Will Clinger)
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; 22-Jan-88 (Will Clinger)
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; Language: Scheme
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; Status: Public Domain
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; TRIANG -- Board game benchmark.
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(define *board* (make-vector 16 1))
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(define *sequence* (make-vector 14 0))
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(define *a* (make-vector 37))
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(define *b* (make-vector 37))
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(define *c* (make-vector 37))
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(define *answer* '())
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(define *final* '())
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(define (last-position)
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(do ((i 1 (+ i 1)))
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((or (= i 16) (= 1 (vector-ref *board* i)))
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(if (= i 16) 0 i))))
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(define (ttry i depth)
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(cond ((= depth 14)
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(let ((lp (last-position)))
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(if (not (member lp *final*))
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(set! *final* (cons lp *final*))))
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(set! *answer*
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(cons (cdr (vector->list *sequence*)) *answer*))
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#t)
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((and (= 1 (vector-ref *board* (vector-ref *a* i)))
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(= 1 (vector-ref *board* (vector-ref *b* i)))
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(= 0 (vector-ref *board* (vector-ref *c* i))))
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(vector-set! *board* (vector-ref *a* i) 0)
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(vector-set! *board* (vector-ref *b* i) 0)
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(vector-set! *board* (vector-ref *c* i) 1)
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(vector-set! *sequence* depth i)
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(do ((j 0 (+ j 1))
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(depth (+ depth 1)))
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((or (= j 36) (ttry j depth)) #f))
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(vector-set! *board* (vector-ref *a* i) 1)
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(vector-set! *board* (vector-ref *b* i) 1)
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(vector-set! *board* (vector-ref *c* i) 0) '())
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(else #f)))
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(define (gogogo i)
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(let ((*answer* '())
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(*final* '()))
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(ttry i 1)))
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(for-each (lambda (i x) (vector-set! *a* i x))
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'(0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36)
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'(1 2 4 3 5 6 1 3 6 2 5 4 11 12
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13 7 8 4 4 7 11 8 12 13 6 10
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15 9 14 13 13 14 15 9 10
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6 6))
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(for-each (lambda (i x) (vector-set! *b* i x))
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'(0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36)
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'(2 4 7 5 8 9 3 6 10 5 9 8
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12 13 14 8 9 5 2 4 7 5 8
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9 3 6 10 5 9 8 12 13 14
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8 9 5 5))
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(for-each (lambda (i x) (vector-set! *c* i x))
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'(0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36)
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'(4 7 11 8 12 13 6 10 15 9 14 13
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13 14 15 9 10 6 1 2 4 3 5 6 1
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3 6 2 5 4 11 12 13 7 8 4 4))
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(vector-set! *board* 5 0)
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;;; call: (gogogo 22))
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(time (let loop ((n 100000))
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(if (zero? n)
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'done
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(begin
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(gogogo 22)
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(loop (- n 1))))))
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