Class: Proco::MT::Worker

Inherits:
Object
  • Object
show all
Includes:
Threaded
Defined in:
lib/proco/mt/worker.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Threaded

#kill, #running?, #spawn

Methods included from Base

#broadcast, #do_when, #signal, #synchronize, #try_when, #wait_until

Methods included from Logger

#logger

Constructor Details

#initialize(logger) ⇒ Worker

Returns a new instance of Worker.



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# File 'lib/proco/mt/worker.rb', line 9

def initialize logger
  super()

  @logger  = logger
  @block   = nil
  @counter = 0

  spawn do
    work while running?
  end
end

Instance Attribute Details

#counter ⇒ Object (readonly)

Returns the value of attribute counter.



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# File 'lib/proco/mt/worker.rb', line 7

def counter
  @counter
end

Instance Method Details

#assign(&block) ⇒ Object

Blocks when working



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# File 'lib/proco/mt/worker.rb', line 43

def assign &block
  #do_when(Proc.new { return unless running?; @block.nil? }) do
  #  @block = block
  #end
  @mtx.lock
  while true
    break unless @block
    return unless running?
    @cv.wait @mtx
  end
  @block = block
ensure
  @cv.broadcast
  @mtx.unlock
end

#exit ⇒ Object 



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# File 'lib/proco/mt/worker.rb', line 75

def exit
  wait_until { @block.nil? }
  super
end

#try_assign(&block) ⇒ Object

Returns nil when working



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# File 'lib/proco/mt/worker.rb', line 60

def try_assign &block
  #try_when(Proc.new { return unless running?; @block.nil? }) do
  #  @block = block
  #end
  return unless @mtx.try_lock

  begin
    return if !running? || @block
    @block = block
  ensure
    @cv.broadcast
    @mtx.unlock
  end
end

#work ⇒ Object 



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# File 'lib/proco/mt/worker.rb', line 21

def work
  # Not using do_when makes the code around the task block about 10% faster
  @mtx.lock
  while true
    break if @block
    return unless running?
    @cv.wait @mtx
  end
  block = @block
  @counter += 1
  @block = nil

  # Release lock here, so that a new task can be assigned during the execution
  # 50 -> 30
  @cv.broadcast
  @mtx.unlock

  # Work!
  block.call
end