31 lines
896 B
Scheme
31 lines
896 B
Scheme
(define-syntax import-os-error-syscall
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(syntax-rules ()
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((import-os-error-syscall syscall (%arg ...) c-name)
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(begin
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(import-lambda-definition syscall/eintr (%arg ...) c-name)
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(define (syscall %arg ...)
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(let ((arg %arg) ...)
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(continuation-capture
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(lambda (cont)
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(let loop ()
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(with-handler
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(lambda (condition more)
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(if (and (exception? condition) (eq? (exception-reason condition)
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'os-error))
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(let ((stuff (exception-arguments condition)))
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(if (= (cadr stuff) errno/intr)
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(loop)
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(continuation-graft
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cont
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(lambda ()
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(apply errno-error
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(cadr stuff) ; errno
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(caddr stuff) ;msg
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syscall
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(cdddr stuff)))))) ;packet
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(more)))
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(lambda ()
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(syscall/eintr %arg ...))))))))))))
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(import-os-error-syscall errno-msg (i) "errno_msg")
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