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make the front-end deadlock avoidance (aka pospone io) wrapper handle specials

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closes PR 11831
This commit is contained in:
Robby Findler 2011-03-31 15:19:27 -05:00
parent 26d7768d3d
commit 56ab3eecb6
1 changed files with 13 additions and 9 deletions
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22
collects/drracket/private/rep.rkt
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@ -20,6 +20,7 @@ TODO
racket/pretty
racket/unit
racket/list
racket/port
string-constants
setup/xref
@ -1654,8 +1655,8 @@ TODO
[drr-evtspace (current-eventspace)]
[s (make-semaphore 0)])
(define-values (sp-err-other-end sp-err) (make-pipe))
(define-values (sp-out-other-end sp-out) (make-pipe))
(define-values (sp-err-other-end sp-err) (make-pipe-with-specials))
(define-values (sp-out-other-end sp-out) (make-pipe-with-specials))
(define io-chan (make-channel))
;; collect the IO to replay later
@ -1670,10 +1671,10 @@ TODO
(map (λ (port) (handle-evt
port
(λ (_)
(define byte (read-byte port))
(if (eof-object? byte)
(define byte/special (read-byte-or-special port))
(if (eof-object? byte/special)
(loop (remq port ports) io)
(loop ports (cons (cons port byte)
(loop ports (cons (cons port byte/special)
io))))))
ports))]))))
@ -1707,10 +1708,13 @@ TODO
;; duplicate it over to the user's ports, now that there is
;; no danger of deadlock
(for ([i (in-list (reverse (channel-get io-chan)))])
(write-byte (cdr i)
(if (eq? (car i) sp-err-other-end)
(get-err-port)
(get-out-port)))))
(define obj (cdr i))
((if (byte? obj) write-byte write-special)
obj
(if (eq? (car i) sp-err-other-end)
(get-err-port)
(get-out-port)))))
(send context enable-evaluation)
(end-edit-sequence)