Class: ThrottleQueue::PriorityQueue

Inherits:
Object
  • Object
show all
Defined in:
lib/throttle-queue.rb

Overview

:nodoc: all

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PriorityQueue

Returns a new instance of PriorityQueue.



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# File 'lib/throttle-queue.rb', line 162

def initialize
  @mutex = Mutex.new
  @fg = []
  @bg = []
  @received = ConditionVariable.new
  @shutdown = false
end

Instance Method Details

#background(id) ⇒ Object 



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# File 'lib/throttle-queue.rb', line 185

def background(id)
  @mutex.synchronize {
    unless @shutdown || @bg.include?(id)
      @bg << id
      @received.signal
    end
  }
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/throttle-queue.rb', line 179

def empty?
  @mutex.synchronize {
    @fg.empty? and @bg.empty?
  }
end

#foreground(id) ⇒ Object 



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# File 'lib/throttle-queue.rb', line 194

def foreground(id)
  @mutex.synchronize {
    unless @shutdown || @fg.include?(id)
      @fg << id
      if @bg.include?(id)
        @bg.delete id
      else
        @received.signal
      end
    end
  }
end

#pop ⇒ Object 



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# File 'lib/throttle-queue.rb', line 207

def pop
  @mutex.synchronize {
    if @fg.empty? and @bg.empty?
      @received.wait(@mutex) unless @shutdown
    end

    if @shutdown
    elsif ! @fg.empty?
      @fg.shift
    else
      @bg.shift
    end
  }
end

#shutdown ⇒ Object 



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# File 'lib/throttle-queue.rb', line 170

def shutdown
  @shutdown = true
  @received.signal
end

#shutdown? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/throttle-queue.rb', line 175

def shutdown?
  @shutdown
end