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  1. #!/usr/bin/perl6
  2.  
  3. class Spawn {
  4. 	has &.cb;
  5. 	has @.args;
  6. 	has $.name;
  7. 	has $.in = Channel.new;
  8.  
  9. 	method receive() {
  10. 		return $!in.receive;
  11. 	}
  12.  
  13. 	multi method send(Str $name, \msg) {
  14. 		for @*scheduler {
  15. 			if .name eq $name {
  16. 				.send([$!name, msg]);
  17. 				last;
  18. 			}
  19. 		}
  20. 	}
  21.  
  22. 	multi method send(\msg) {
  23. 		$!in.send(msg);
  24. 	}
  25.  
  26. 	method loop {
  27. 		start {
  28. 			&!cb(self, |@!args);
  29. 		}
  30. 	}
  31. }
  32.  
  33. my @*scheduler = [];
  34.  
  35. sub main-loop() {
  36. 	await Promise.allof(
  37. 		[ @*scheduler>>.loop ]
  38. 	);
  39. }
  40.  
  41. sub spawn(&cb, @args, :$name) {
  42. 	@*scheduler.push(
  43. 		Spawn.new(
  44. 			cb => &cb,
  45. 			args => @args,
  46. 			name => $name
  47. 		)
  48. 	);
  49. }
  50.  
  51. &spawn(&ping, ["pong", 3], name => "ping");
  52. &spawn(&pong, [], name => "pong");
  53. &main-loop();
  54.  
  55. sub ping(\s, Str $name, Int $x) {
  56. 	for ^$x {
  57. 		s.send($name, "pong");
  58. 		if s.receive -> ($ping, $msg) {
  59. 			given $msg {
  60. 				when /ping/ {
  61. 					say "{$msg} received from {$ping}";
  62. 				}
  63. 			}
  64. 		}
  65. 	}
  66. 	s.send($name, "finish");
  67. 	say "ping finished!";
  68. }
  69. sub pong(\s) {
  70. 	while (True) {
  71. 		if s.receive -> ($ping, $msg) {
  72. 			given $msg {
  73. 				when /finish/ {
  74. 					say "pong finished.";
  75. 					last;
  76. 				}
  77. 				when /pong/ {
  78. 					say "{$msg} received from {$ping}";
  79. 					s.send($ping, "ping");
  80. 				}
  81. 			}
  82. 		}
  83. 	}
  84. }
Success #stdin #stdout 0.32s 272320KB
comments (?)
stdin
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Standard input is empty
stdout
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pong received from ping
ping received from pong
pong received from ping
ping received from pong
pong received from ping
ping received from pong
ping finished!
pong finished.
https://ideone.com/i7yUQQ
language:
Perl (perl 2018.12)
created:
6 years ago
visibility:
public

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