37 lines
800 B
Plaintext
Executable File
37 lines
800 B
Plaintext
Executable File
#!/usr/bin/newlisp
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#
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# two forked processes communicating via pipes
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(when (find ostype '("Windows"))
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(println "fork not available on Windows")
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(exit))
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(println)
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(println "Testing/benchmarking pipes with forked processes")
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(set 'start (time-of-day))
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(set 'N 1000)
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(define (count-down-proc x channel)
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(while (!= x 0)
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(write-line channel (string x))
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(dec x)))
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(define (observer-proc channel)
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(do-until (= i "1")
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(print "read " (setq i (read-line channel)) "\r")
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))
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(map set '(in out) (pipe))
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(set 'observer (fork (observer-proc in)))
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(set 'counter (fork (count-down-proc N out)))
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; avoid zombies
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(wait-pid observer)
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(wait-pid counter)
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(println ">>>>> " (div (- (time-of-day) start) N)
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" ms per write->read pipe/fork (0.0356 ms Mac OSX, 1.83 GHz Core 2 Duo)")
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(exit)
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