module Structure

# File lib/structure.rb, line 8
def included(base)
  if base.is_a?(Class)
    base.extend ClassMethods
  else
    def base.included(base)
      ::Structure.send(:included, base)
    end
  end
end

# File lib/structure.rb, line 45
def ==(other)
  if public_methods(false).include?(:<=>)
    super
  else
    attributes == other.attributes
  end
end

# File lib/structure.rb, line 19
def attribute_names
  self.class.attribute_names
end

# File lib/structure.rb, line 53
def eql?(other)
  return false if other.class != self.class

  self == other
end

# File lib/structure.rb, line 59
def freeze
  attribute_names.each { |key| send(key) }
  super
end

# File lib/structure.rb, line 33
def inspect
  detail = if public_methods(false).include?(:to_s)
             to_s
           else
             to_a.map { |key, val| "#{key}=#{val.inspect}" }.join(', ')
           end

  "#<#{self.class.name || '?'} #{detail}>"
end

# File lib/structure.rb, line 64
def marshal_dump
  attributes.values
end

# File lib/structure.rb, line 68
def marshal_load(data)
  @mutex = ::Thread::Mutex.new
  attribute_names.zip(data).each do |key, val|
    instance_variable_set(:"@#{key}", val)
  end
end

# File lib/structure.rb, line 23
def to_a
  attribute_names.map { |key| [key, send(key)] }
end

# File lib/structure.rb, line 27
def to_h
  Hash[to_a]
end

# File lib/structure.rb, line 77
def with_mutex(&block)
  @mutex.owned? ? block.call : @mutex.synchronize { block.call }
end