max=

# File lib/thread.rb, line 264
  def max=(max)
    diff = nil
    @mutex.synchronize {
      if max <= @max
        @max = max
      else
        diff = max - @max
        @max = max
      end
    }
    if diff
      diff.times do
        begin
          t = @queue_wait.shift
          t.run if t
        rescue ThreadError
          retry
        end
      end
    end
    max
  end