/*
 * @OSF_COPYRIGHT@
 * COPYRIGHT NOTICE
 * Copyright (c) 1990, 1991, 1992, 1993 Open Software Foundation, Inc.
 * ALL RIGHTS RESERVED (DCE).  See the file named COPYRIGHT.DCE in the
 * src directory for the full copyright text.
 */
/*
 * HISTORY
 * $Log: cma_semaphore_defs.h,v $
 * Revision 1.1.2.2  1992/12/15  22:30:11  alan
 * 	Insert copyright notices
 * 	[1992/12/07  19:41:03  alan]
 *
 * Revision 1.1  1992/01/19  14:38:52  devrcs
 * 	Initial revision
 * 
 * $EndLog$
 */
/*
*/
/*
 *  Copyright (c) 1989, 1991 by
 *  Digital Equipment Corporation, Maynard Massachusetts.
 *  All rights reserved.
 *
 *  This software is furnished under a license and may be used and  copied
 *  only  in  accordance  with  the  terms  of  such  license and with the
 *  inclusion of the above copyright notice.  This software or  any  other
 *  copies  thereof may not be provided or otherwise made available to any
 *  other person.  No title to and ownership of  the  software  is  hereby
 *  transferred.
 *
 *  The information in this software is subject to change  without  notice
 *  and  should  not  be  construed  as  a commitment by DIGITAL Equipment
 *  Corporation.
 *
 *  DIGITAL assumes no responsibility for the use or  reliability  of  its
 *  software on equipment which is not supplied by DIGITAL.
 */

/*
 *  FACILITY:
 *
 *	CMA services
 *
 *  ABSTRACT:
 *
 *	Header file for semaphore structure definition.
 *
 *  AUTHORS:
 *
 *	Dave Butenhof and Webb Scales
 *
 *  CREATION DATE:
 *
 *	4 December 1989
 *
 *  MODIFICATION HISTORY:
 *
 *	001	Dave Butenhof	03 August 1990
 *		Simplify from counting semaphores to "blocking objects with
 *		state".  It's almost a binary semaphore, since it has state
 *		to support pending-wakeup, however rather than just P and V
 *		operations, it supports "wait", "wake one", and "wake all"
 *		operations.
 *	002	Dave Butenhof	08 August 1990
 *		Change "pending" bit to "nopending" (to better describe the
 *		function now that it'll be "set" with an interlocked clear
 *		and "cleared and tested" with an interlocked test-and-set).
 *	003	Dave Butenhof	09 April 1991
 *		Use new type for "atomic bit" operation target
 */
#ifndef CMA_SEMAPHORE_DEFS
#define CMA_SEMAPHORE_DEFS

/*
 *  INCLUDE FILES
 */
#include <cma.h>
#include <cma_queue.h>
#include <cma_defs.h>

/*
 * CONSTANTS AND MACROS
 */

#define cma__c_semaphore_timeout 1
#define cma__c_semaphore_event	 0
#define cma__c_select_timeout	 2

/*
 * TYPEDEFS
 */

typedef struct CMA__T_SEMAPHORE {
    cma__t_queue	queue;
    cma__t_atomic_bit	nopending;
    } cma__t_semaphore;

#endif
/*  DEC/CMS REPLACEMENT HISTORY, Element CMA_SEMAPHORE_DEFS.H */
/*  *5    10-JUN-1991 19:55:49 SCALES "Convert to stream format for ULTRIX build" */
/*  *4    10-JUN-1991 19:21:31 BUTENHOF "Fix the sccs headers" */
/*  *3    10-JUN-1991 18:23:20 SCALES "Add sccs headers for Ultrix" */
/*  *2    12-APR-1991 23:36:43 BUTENHOF "Change type of internal locks" */
/*  *1    12-DEC-1990 21:52:20 BUTENHOF "Binary semaphores" */
/*  DEC/CMS REPLACEMENT HISTORY, Element CMA_SEMAPHORE_DEFS.H */