34 lines
744 B
OCaml
34 lines
744 B
OCaml
open Printf
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open Thread
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let rec integers n ch =
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Event.sync (Event.send ch n);
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integers (n+1) ch
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let rec sieve n chin chout =
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let m = Event.sync (Event.receive chin)
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in if m mod n = 0
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then sieve n chin chout
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else Event.sync (Event.send chout m);
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sieve n chin chout
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let rec print_primes ch max =
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let n = Event.sync (Event.receive ch)
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in if n > max
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then ()
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else begin
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printf "%d\n" n; flush stdout;
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let ch_after_n = Event.new_channel ()
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in Thread.create (sieve n ch) ch_after_n;
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print_primes ch_after_n max
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end
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let go max =
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let ch = Event.new_channel ()
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in Thread.create (integers 2) ch;
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print_primes ch max;;
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let _ = go 1000
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;;
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