Class: ParticlePool::PoolThread

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/particle_pool/pool_thread.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PoolThread

Returns a new instance of PoolThread.



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# File 'lib/particle_pool/pool_thread.rb', line 6

def initialize
  @queue = Queue.new
  @mtx   = Mutex.new
  @tasks = 0
end

Instance Attribute Details

#tasks ⇒ Object (readonly)

Returns the value of attribute tasks.



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# File 'lib/particle_pool/pool_thread.rb', line 4

def tasks
  @tasks
end

Instance Method Details

#<<(t, *args, **kwargs) ⇒ Object 



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# File 'lib/particle_pool/pool_thread.rb', line 12

def <<(t, *args, **kwargs)
  push(t, *args, **kwargs)
end

#<=>(other) ⇒ Object 



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# File 'lib/particle_pool/pool_thread.rb', line 27

def <=>(other)
  self.tasks <=> other.tasks
end

#push(t, *args, **kwargs) ⇒ Object 



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# File 'lib/particle_pool/pool_thread.rb', line 16

def push(t, *args, **kwargs)
  @mtx.synchronize do
    @tasks += 1
    @queue << {
      task: t,
      args: args,
      kwargs: kwargs
    }
  end
end

#start ⇒ Object 



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# File 'lib/particle_pool/pool_thread.rb', line 31

def start
  tasks = []
  iter = tasks.each
  loop do
    nt = []

    shouldpop = lambda do
      return true unless @queue.empty?
      return true if tasks.empty? && nt.empty?
      false
    end

    shouldblock = lambda do
      return true if @queue.empty? && (!tasks.empty? || !nt.empty?)
      false
    end

    while shouldpop.()
      begin
        i = @queue.pop shouldblock.()
        nt << i
      rescue ThreadError
        break
      end
    end
    nt.each do |i|
      begin
        t = i[:task]
        t.start(*i[:args], **i[:kwargs])
        tasks << t
      rescue => e
        puts e.backtrace
        puts e
      end
    end
    begin
      t = iter.next
      t.resume
      if t.done?
        @tasks -= 1
        tasks.delete t
      end
    rescue StopIteration
      iter.rewind
    end
  end
end