18 lines
484 B
Racket
18 lines
484 B
Racket
#lang racket/base
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(provide run/timeout
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define/timeout)
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(require racket/engine)
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;; (-> A) Real -> (U A Engine)
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;; run the given thunk in an engine for 'fuel' milliseconds
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;; if the engine completes, returns the result, otherwise the engine itself
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(define (run/timeout tnk [fuel 1000])
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(define e (engine (lambda (p) (tnk))))
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(define r (engine-run fuel e))
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(if r (engine-result e) e))
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(define-syntax-rule (define/timeout x e)
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(define x (run/timeout (lambda () e))))
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