text: /*-
   * Copyright (c) 2007 Attilio Rao <attilio@freebsd.org>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice(s), this list of conditions and the following disclaimer as
   *    the first lines of this file unmodified other than the possible 
   *    addition of one or more copyright notices.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice(s), this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
   * DAMAGE.
   *
   * $FreeBSD: releng/10.2/sys/sys/_sx.h 179025 2008-05-15 20:10:06Z attilio $
   */
  
  #ifndef	_SYS__SX_H_
  #define	_SYS__SX_H_
  
  /*
   * Shared/exclusive lock main structure definition.
   */
  struct sx {
  	struct lock_object	lock_object;
  	volatile uintptr_t	sx_lock;
  };
  
  #endif	/* !_SYS__SX_H_ */
  