1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*
28 * The enclosed is a private interface between system libraries and
29 * the kernel.  It should not be used in any other way.  It may be
30 * changed without notice in a minor release of Solaris.
31 */
32
33#ifndef	_SYS_SCHEDCTL_H
34#define	_SYS_SCHEDCTL_H
35
36#pragma ident	"%Z%%M%	%I%	%E% SMI"
37
38#ifdef	__cplusplus
39extern "C" {
40#endif
41
42#if !defined(_ASM)
43
44#include <sys/types.h>
45#include <sys/processor.h>
46
47/*
48 * This "public" portion of the sc_shared data is used by libsched/libc.
49 */
50typedef struct sc_public {
51	volatile short	sc_nopreempt;
52	volatile short	sc_yield;
53} sc_public_t;
54
55/*
56 * The private portion of the sc_shared data is for
57 * use by user-level threading support code in libc.
58 * Java has a contract to look at sc_state and sc_cpu (PSARC/2005/351).
59 */
60typedef struct sc_shared {
61	volatile ushort_t sc_state;	/* current LWP state */
62	volatile char	sc_sigblock;	/* all signals blocked */
63	volatile uchar_t sc_flgs;	/* set only by curthread; see below */
64	volatile processorid_t sc_cpu;	/* last CPU on which LWP ran */
65	volatile char	sc_cid;		/* scheduling class id */
66	volatile char	sc_cpri;	/* class priority, -128..127 */
67	volatile uchar_t sc_priority;	/* dispatch priority, 0..255 */
68	char		sc_pad;
69	sc_public_t	sc_preemptctl;	/* preemption control data */
70} sc_shared_t;
71
72/* sc_flgs */
73#define	SC_PARK_FLG	0x01	/* calling lwp_park() */
74#define	SC_CANCEL_FLG	0x02	/* cancel pending and not disabled */
75#define	SC_EINTR_FLG	0x04	/* EINTR returned due to SC_CANCEL_FLG */
76
77/*
78 * Possible state settings.  These are same as the kernel thread states
79 * except there is no zombie state.
80 */
81#define	SC_FREE		0x00
82#define	SC_SLEEP	0x01
83#define	SC_RUN		0x02
84#define	SC_ONPROC	0x04
85#define	SC_STOPPED	0x10
86#define	SC_WAIT		0x20
87
88/* preemption control settings */
89#define	SC_MAX_TICKS	2		/* max time preemption can be blocked */
90
91#ifdef	_KERNEL
92caddr_t	schedctl(void);
93void	schedctl_init(void);
94void	schedctl_lwp_cleanup(kthread_t *);
95void	schedctl_proc_cleanup(void);
96int	schedctl_get_nopreempt(kthread_t *);
97void	schedctl_set_nopreempt(kthread_t *, short);
98void	schedctl_set_yield(kthread_t *, short);
99void	schedctl_set_cidpri(kthread_t *);
100int	schedctl_sigblock(kthread_t *);
101void	schedctl_finish_sigblock(kthread_t *);
102int	schedctl_cancel_pending(void);
103void	schedctl_cancel_eintr(void);
104int	schedctl_is_park(void);
105void	schedctl_set_park(void);
106void	schedctl_unpark(void);
107#endif	/* _KERNEL */
108
109#endif	/* !defined(_ASM) */
110
111#ifdef	__cplusplus
112}
113#endif
114
115#endif	/* _SYS_SCHEDCTL_H */
116