50 lines
680 B
Ruby
50 lines
680 B
Ruby
# frozen_string_literal: false
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class LocalBarrier
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def initialize(n)
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@wait = Thread::Queue.new
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@done = Thread::Queue.new
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@keeper = begin_keeper(n)
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end
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def sync
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@done.push(true)
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@wait.pop
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end
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def join
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@keeper.join
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end
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private
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def begin_keeper(n)
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Thread.start do
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n.times do
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@done.pop
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end
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n.times do
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@wait.push(true)
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end
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end
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end
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end
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n = 10
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lb = LocalBarrier.new(n)
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(n - 1).times do |i|
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Thread.start do
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sleep((rand(n) + 1) / 100.0)
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print "#{i}: done\n"
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lb.sync
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print "#{i}: cont\n"
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end
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end
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lb.sync
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print "#{n-1}: cont\n"
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# lb.join # [ruby-dev:30653]
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print "exit.\n"
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