require 'thread'

module Rex

###
#
# Ref
# ---
#
# This module provides a uniform reference counted interface for classes to
# use.
#
###
module Ref

	#
	# Initializes the reference count to one.
	#
	def refinit
		@_references       = 1
		@_references_mutex = Mutex.new

		self
	end

	#
	# Increments the total number of references.
	#
	def ref
		@_references_mutex.synchronize {
			@_references += 1
		}

		self
	end

	#
	# Decrements the total number of references.  If the reference count
	# reaches zero, true is returned.  Otherwise, false is returned.
	#
	def deref
		@_references_mutex.synchronize {
			((@_references -= 1) == 0) ? true : false
		}
	end

end
end