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Change field reference/mutation to use unsafe ops instead.

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This commit is contained in:
Stevie Strickland 2010-11-15 17:07:38 -05:00
parent 2bd7760412
commit 68273cc31d
1 changed files with 14 additions and 18 deletions
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32
collects/racket/private/class-internal.rkt
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@ -6,6 +6,7 @@
(only-in racket/contract/private/arrow making-a-method)
racket/list
racket/stxparam
racket/unsafe/ops
"class-events.rkt"
"serialize-structs.rkt"
"define-struct.rkt"
@ -2172,24 +2173,23 @@
(let-values ([(inh-accessors inh-mutators)
(values (map (lambda (id)
(let* ([cls/index (hash-ref field-ht id)]
[accessor
(make-struct-field-accessor (class-field-ref (car cls/index)) (cadr cls/index) #f)]
[idx (cadr cls/index)]
[access-proj (vector-ref int-field-ref-projs (cddr cls/index))])
(λ (o) (access-proj (accessor o)))))
(λ (o) (access-proj (unsafe-struct-ref o idx)))))
inherit-field-names)
(map (lambda (id)
(let* ([cls/index (hash-ref field-ht id)]
[mutator
(make-struct-field-mutator (class-field-set! (car cls/index)) (cadr cls/index) #f)]
[idx (cadr cls/index)]
[mutate-proj (vector-ref int-field-set-projs (cddr cls/index))])
(λ (o v) (mutator o (mutate-proj v)))))
(λ (o v) (unsafe-struct-set! o idx (mutate-proj v)))))
inherit-field-names))])
;; Add class/index pairs for public fields.
(unless no-new-fields?
(let ([sup-count (class-field-pub-width super)])
(let ([sup-count (class-field-width super)]
[sup-pub-count (class-field-pub-width super)])
(for ([id (in-list public-field-names)]
[i (in-naturals)])
(hash-set! field-ht id (cons c (cons i (+ i sup-count)))))))
(hash-set! field-ht id (cons c (cons (+ i sup-count) (+ i sup-pub-count)))))))
;; -- Extract superclass methods and make rename-inners ---
(let ([rename-supers (map (lambda (index mname)
@ -3784,19 +3784,17 @@
(for-class (class-name class))))))])
(values (λ (class name)
(let* ([cls/index (check-and-get-index 'class-field-accessor class name)]
[field-ref (class-field-ref (car cls/index))]
[field-pos (cadr cls/index)]
[proj (vector-ref (class-ext-field-ref-projs class) (cddr cls/index))])
(λ (o) (if (object? o)
(proj (field-ref o field-pos))
(proj (unsafe-struct-ref o field-pos))
(raise-type-error 'class-field-accessor "object" o)))))
(λ (class name)
(let* ([cls/index (check-and-get-index 'class-field-mutator class name)]
[field-set! (class-field-set! (car cls/index))]
[field-pos (cadr cls/index)]
[proj (vector-ref (class-ext-field-set-projs class) (cddr cls/index))])
(λ (o v) (if (object? o)
(field-set! o field-pos (proj v))
(unsafe-struct-set! o field-pos (proj v))
(raise-type-error 'class-field-mutator "object" o))))))))
(define-struct generic (name applicable))
@ -3950,10 +3948,9 @@
[field-ht (class-field-ht cls)]
[cls/index (hash-ref field-ht id #f)])
(if cls/index
(let ([field-set! (class-field-set! (car cls/index))]
[field-pos (cadr cls/index)]
(let ([field-pos (cadr cls/index)]
[proj (vector-ref (class-ext-field-set-projs cls) (cddr cls/index))])
(field-set! obj field-pos (proj val)))
(unsafe-struct-set! obj field-pos (proj val)))
(raise-mismatch-error
'get-field
(format "expected an object that has a field named ~s, got " id)
@ -3989,10 +3986,9 @@
[field-ht (class-field-ht cls)]
[cls/index (hash-ref field-ht id #f)])
(if cls/index
(let ([field-ref (class-field-ref (car cls/index))]
[field-pos (cadr cls/index)]
(let ([field-pos (cadr cls/index)]
[proj (vector-ref (class-ext-field-ref-projs cls) (cddr cls/index))])
(proj (field-ref obj field-pos)))
(proj (unsafe-struct-ref obj field-pos)))
(raise-mismatch-error
'get-field
(format "expected an object that has a field named ~s, got " id)