indexing
	description: "Objects that ..."
	author: ""
	date: "$Date$"
	revision: "$Revision$"

class
	MUTEX

inherit

	ANY
		redefine
			default_create
		end

feature 

	try_lock: BOOLEAN is
		do
			Result := mutex_imp.wait_one (0, True)
		end

	lock is
		local
			l_lock_succeed: BOOLEAN
		do
			l_lock_succeed := mutex_imp.wait_one
		end

	unlock is
		do
			mutex_imp.release_mutex
		end

	is_set: BOOLEAN is
			-- Is mutex initialized?
		do
			Result := (mutex_imp /= Void)
		end

	destroy is
			-- Destroy mutex.
		require
			valid_mutex: is_set
		do
			mutex_imp.close
			mutex_imp := Void
		end

feature {NONE} -- Initialization

	mutex_imp: SYSTEM_MUTEX

	default_create is
			-- Initialize `Current'.
		do
			create mutex_imp.make
		end

end -- class MUTEX

--|----------------------------------------------------------------
--| EiffelThread: library of reusable components for ISE Eiffel.
--| Copyright (C) 1985-2004 Eiffel Software. All rights reserved.
--| Duplication and distribution prohibited.  May be used only with
--| ISE Eiffel, under terms of user license.
--| Contact Eiffel Software for any other use.
--|
--| Interactive Software Engineering Inc.
--| dba Eiffel Software
--| 356 Storke Road, Goleta, CA 93117 USA
--| Telephone 805-685-1006, Fax 805-685-6869
--| Contact us at: http://www.eiffel.com/general/email.html
--| Customer support: http://support.eiffel.com
--| For latest info on our award winning products, visit:
--|	http://www.eiffel.com
--|----------------------------------------------------------------