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/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.1 (the "License").  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

/* 
 * Mach Operating System
 * Copyright (c) 1989 Carnegie-Mellon University
 * Copyright (c) 1988 Carnegie-Mellon University
 * Copyright (c) 1987 Carnegie-Mellon University
 * All rights reserved.  The CMU software License Agreement specifies
 * the terms and conditions for use and redistribution.
 */
/*
 *	File:	sched_prim.h
 *	Author:	David Golub
 *
 *	Scheduling primitive definitions file
 *
 */

#ifndef	_KERN_INTERNAL_SCHED_PRIM_H_
#define _KERN_INTERNAL_SCHED_PRIM_H_

/*
 *	Possible results of assert_wait - returned in
 *	current_thread()->wait_result.
 */
#define THREAD_AWAKENED		0		/* normal wakeup */
#define THREAD_TIMED_OUT	1		/* timeout expired */
#define THREAD_INTERRUPTED	2		/* interrupted by clear_wait */
#define THREAD_SHOULD_TERMINATE	3		/* thread should terminate */
#define THREAD_RESTART		4		/* restart operation entirely */

/*
 *	Exported interface to sched_prim.c 
 */

extern void	sched_init();
extern void	assert_wait();
extern void	clear_wait();
extern void	thread_sleep();
extern void	thread_wakeup();		/* for function pointers */
extern void	thread_wakeup_prim();
extern void	thread_block();
extern void	thread_run();
extern void	thread_set_timeout();
extern void	thread_setrun();
extern int	thread_wait_result();

/*
 *	Routines defined as macros
 */

#define thread_wakeup(x)						\
		thread_wakeup_prim((x), FALSE, THREAD_AWAKENED)
#define thread_wakeup_with_result(x, z)					\
		thread_wakeup_prim((x), FALSE, (z))
#define thread_wakeup_one(x)						\
		thread_wakeup_prim((x), TRUE, THREAD_AWAKENED)

#endif	/* _KERN_INTERNAL_SCHED_PRIM_H_ */

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