Class: PerfectQueue::BlockingFlag

Inherits:
Object
  • Object
show all
Defined in:
lib/perfectqueue/blocking_flag.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BlockingFlag

Returns a new instance of BlockingFlag.



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# File 'lib/perfectqueue/blocking_flag.rb', line 22

def initialize
  @set = false
  @mutex = Mutex.new
  @cond = ConditionVariable.new
end

Instance Method Details

#reset! ⇒ Object 



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# File 'lib/perfectqueue/blocking_flag.rb', line 40

def reset!
  toggled = false
  @mutex.synchronize do
    if @set
      @set = false
      toggled = true
    end
    @cond.broadcast
  end
  return toggled
end

#reset_region(&block) ⇒ Object 



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# File 'lib/perfectqueue/blocking_flag.rb', line 65

def reset_region(&block)
  reset!
  begin
    block.call
  ensure
    set!
  end
end

#set! ⇒ Object 



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# File 'lib/perfectqueue/blocking_flag.rb', line 28

def set!
  toggled = false
  @mutex.synchronize do
    unless @set
      @set = true
      toggled = true
    end
    @cond.broadcast
  end
  return toggled
end

#set? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/perfectqueue/blocking_flag.rb', line 52

def set?
  @set
end

#set_region(&block) ⇒ Object 



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# File 'lib/perfectqueue/blocking_flag.rb', line 56

def set_region(&block)
  set!
  begin
    block.call
  ensure
    reset!
  end
end

#wait(timeout = nil) ⇒ Object 



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# File 'lib/perfectqueue/blocking_flag.rb', line 74

def wait(timeout=nil)
  @mutex.synchronize do
    @cond.wait(@mutex, timeout)
  end
  self
end