sync_extended

# File lib/sync.rb, line 104
  def sync_extended
    unless (defined? locked? and
            defined? shared? and
            defined? exclusive? and
            defined? lock and
            defined? unlock and
            defined? try_lock and
            defined? synchronize)
      Sync_m.define_aliases(class<<self;self;end)
    end
    sync_initialize
  end