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, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef _SYS_LWP_UPIMUTEX_IMPL_H
28#define	_SYS_LWP_UPIMUTEX_IMPL_H
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#include <sys/thread.h>
33#include <sys/lwp.h>
34
35#ifdef	__cplusplus
36extern "C" {
37#endif
38
39typedef struct upimutex upimutex_t;
40typedef struct upib upib_t;
41
42struct upib {
43	kmutex_t upib_lock;
44	upimutex_t *upib_first;
45};
46
47struct upimutex {
48	struct _kthread *upi_owner;  /* owner */
49	int	upi_waiter; /* wait bit */
50	upib_t *upi_upibp; /* point back to upib bucket in hash chain */
51	lwp_mutex_t *upi_vaddr;   /* virtual address, i.e. user lock ptr */
52	lwpchan_t  upi_lwpchan;  /* lwpchan of virtual address */
53	upimutex_t *upi_nextchain; /* next in hash chain */
54	upimutex_t *upi_nextowned; /* list of mutexes owned by lwp */
55};
56
57#define	UPILWPCHAN_BITS		9
58#define	UPILWPCHAN_TABSIZ	(1 << UPILWPCHAN_BITS)
59#define	UPIMUTEX_TABSIZE	UPILWPCHAN_TABSIZ
60#define	UPILWPCHAN_HASH(lwpchan)	\
61	(((uintptr_t)((lwpchan).lc_wchan0)^(uintptr_t)((lwpchan).lc_wchan)) ^ \
62	(((uintptr_t)((lwpchan).lc_wchan0)^(uintptr_t)((lwpchan).lc_wchan)) >> \
63	UPILWPCHAN_BITS)) & (UPIMUTEX_TABSIZE - 1)
64#define	UPI_CHAIN(lwpchan)	upimutextab[UPILWPCHAN_HASH((lwpchan))]
65
66#define	UPIMUTEX_TRY	1
67#define	UPIMUTEX_BLOCK	0
68
69#ifdef _KERNEL
70extern void upimutex_cleanup();
71#endif	/* _KERNEL */
72
73#ifdef	__cplusplus
74}
75#endif
76
77#endif	/* _SYS_LWP_UPIMUTEX_IMPL_H */
78