Class: CountDownLatch

Inherits:
Object
  • Object
show all
Defined in:
app/count_down_latch.rb

Overview

A latch that allows you to wait for a maximum number of seconds.

Instance Method Summary collapse

Constructor Details

#initialize(count) ⇒ CountDownLatch

Returns a new instance of CountDownLatch.



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# File 'app/count_down_latch.rb', line 5

def initialize(count)
  @count = count
  @mutex = Mutex.new
  @resource = ConditionVariable.new
end

Instance Method Details

#await(timeout:) ⇒ Object 



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# File 'app/count_down_latch.rb', line 25

def await(timeout:)
  @mutex.synchronize do
    @resource.wait(@mutex, timeout) if @count.positive?
    raise 'timed out while waiting' unless @count.zero?
  end
end

#count ⇒ Object 



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# File 'app/count_down_latch.rb', line 21

def count
  @mutex.synchronize { @count }
end

#count_down ⇒ Object 



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# File 'app/count_down_latch.rb', line 11

def count_down
  @mutex.synchronize do
    if @count.positive?
      @count -= 1
      @resource.signal if @count.zero?
    end
    @count
  end
end