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36 lines
713 B
Ruby
36 lines
713 B
Ruby
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# many threads, one mutex, many condvars
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require 'thread'
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m = Mutex.new
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cv1 = ConditionVariable.new
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cv2 = ConditionVariable.new
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max = 1000
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n = 100
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waiting = 0
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scvs = []
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waiters = n.times.map do |i|
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start_cv = ConditionVariable.new
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scvs << start_cv
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start_mtx = Mutex.new
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start_mtx.synchronize do
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th = Thread.new(start_mtx, start_cv) do |sm, scv|
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m.synchronize do
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sm.synchronize { scv.signal }
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max.times do
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cv2.signal if (waiting += 1) == n
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cv1.wait(m)
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end
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end
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end
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start_cv.wait(start_mtx)
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th
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end
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end
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m.synchronize do
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max.times do
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cv2.wait(m) until waiting == n
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waiting = 0
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cv1.broadcast
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end
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end
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waiters.each(&:join)
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