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docs: fix memory-management bugs in serialize-cstruct example

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This commit is contained in:
Matthew Flatt 2018-01-01 19:16:19 -07:00
parent 5e47b23276
commit fdb2076dab
1 changed files with 8 additions and 8 deletions
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16
pkgs/racket-doc/scribblings/foreign/serialize-cstruct.scrbl
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@ -129,21 +129,21 @@ after garbage collection.
(define f0/s (serialize (make-fish 1)))
(fish-color (deserialize f0/s))
(define-serializable-cstruct _aq ([a _fish-pointer]
[d _aq-pointer/null])
(define-serializable-cstruct _aq ([a (_gcable _fish-pointer)]
[d (_gcable _aq-pointer/null)])
#:malloc-mode 'nonatomic)
(define aq1 (make-aq/mode (make-fish 6) #f))
(code:line (set-aq-d! aq1 aq1) (code:comment "create a cycle"))
(define aq0/s (serialize aq1))
(aq-a (aq-d (aq-d (deserialize aq0/s))))
(code:comment @#,elem{Same shape as original @racket[aq]:})
(define-serializable-cstruct _old-aq ([a _fish-pointer]
[d _pointer])
(define-serializable-cstruct _old-aq ([a (_gcable _fish-pointer)]
[d (_gcable _pointer)])
#:malloc-mode 'nonatomic)
(code:comment @#,elem{Replace the original @racket[aq]:})
(define-serializable-cstruct _aq ([a _fish-pointer]
[b _fish-pointer]
[d _aq-pointer/null])
(define-serializable-cstruct _aq ([a (_gcable _fish-pointer)]
[b (_gcable _fish-pointer)]
[d (_gcable _aq-pointer/null)])
#:malloc-mode 'nonatomic
#:version 1
#:other-versions ([0 deserialize-chain:cstruct:old-aq
@ -165,7 +165,7 @@ after garbage collection.
(code:comment "Deserialize old instance to new cstruct:")
(fish-color (aq-a (aq-d (aq-d (deserialize aq0/s)))))
(define aq1/s (serialize (make-aq (make-fish 1) (make-fish 2) #f)))
(define aq1/s (serialize (make-aq/mode (make-fish 1) (make-fish 2) #f)))
(code:comment @#,elem{New version of @racket[fish]:})
(define-serializable-cstruct _old-fish ([color _int]))
(define-serializable-cstruct _fish ([weight _float]