blob: 6431bf22bca000d48e27ca2ea725c27b6ae7836d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_SYNCH_H
#define _SYS_SYNCH_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifndef _ASM
#include <sys/types.h>
#include <sys/int_types.h>
#endif /* _ASM */
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _ASM
/*
* Thread and LWP mutexes have the same type
* definitions.
*
* NOTE:
*
* POSIX requires that <pthread.h> define the structures pthread_mutex_t
* and pthread_cond_t. Although these structures are identical to mutex_t
* (lwp_mutex_t) and cond_t (lwp_cond_t), defined here, a typedef of these
* types would require including <synch.h> in <pthread.h>, pulling in
* non-posix symbols/constants, violating POSIX namespace restrictions. Hence,
* pthread_mutex_t/pthread_cond_t have been redefined (in <sys/types.h>).
* Any modifications done to mutex_t/lwp_mutex_t or cond_t/lwp_cond_t must
* also be done to pthread_mutex_t/pthread_cond_t.
*/
typedef struct _lwp_mutex {
struct {
uint16_t flag1;
uint8_t flag2;
uint8_t ceiling;
union {
uint16_t bcptype;
struct {
uint8_t count_type1;
uint8_t count_type2;
} mtype_rcount;
} mbcp_type_un;
uint16_t magic;
} flags;
union {
struct {
uint8_t pad[8];
} lock64;
struct {
uint32_t ownerpid;
uint32_t lockword;
} lock32;
upad64_t owner64;
} lock;
upad64_t data;
} lwp_mutex_t;
/*
* Thread and LWP condition variables have the same
* type definition.
* NOTE:
* The layout of the following structure should be kept in sync with the
* layout of pthread_cond_t in sys/types.h. See NOTE above for lwp_mutex_t.
*/
typedef struct _lwp_cond {
struct {
uint8_t flag[4];
uint16_t type;
uint16_t magic;
} flags;
upad64_t data;
} lwp_cond_t;
/*
* LWP semaphores
*/
typedef struct _lwp_sema {
uint32_t count; /* semaphore count */
uint16_t type;
uint16_t magic;
uint8_t flags[8]; /* last byte reserved for waiters */
upad64_t data; /* optional data */
} lwp_sema_t;
/*
* Thread and LWP rwlocks have the same type definition.
* NOTE: The layout of this structure should be kept in sync with the layout
* of the correponding structure of pthread_rwlock_t in sys/types.h.
* Also, because we have to deal with C++, there is an identical structure
* for rwlock_t in head/sync.h that we cannot change.
*/
typedef struct _lwp_rwlock {
int32_t readers; /* rwstate word */
uint16_t type;
uint16_t magic;
lwp_mutex_t mutex; /* used with process-shared rwlocks */
lwp_cond_t readercv; /* used only to indicate ownership */
lwp_cond_t writercv; /* used only to indicate ownership */
} lwp_rwlock_t;
#endif /* _ASM */
/*
* Definitions of synchronization types.
*/
#define USYNC_THREAD 0x00 /* private to a process */
#define USYNC_PROCESS 0x01 /* shared by processes */
/* Keep the following values in sync with pthread.h */
#define LOCK_NORMAL 0x00 /* same as USYNC_THREAD */
#define LOCK_SHARED 0x01 /* same as USYNC_PROCESS */
#define LOCK_ERRORCHECK 0x02 /* error check lock */
#define LOCK_RECURSIVE 0x04 /* recursive lock */
#define LOCK_PRIO_INHERIT 0x10 /* priority inheritance lock */
#define LOCK_PRIO_PROTECT 0x20 /* priority ceiling lock */
#define LOCK_ROBUST 0x40 /* robust lock */
/*
* USYNC_PROCESS_ROBUST is a deprecated historical type. It is mapped
* into (USYNC_PROCESS | LOCK_ROBUST) by mutex_init(). Application code
* should be revised to use (USYNC_PROCESS | LOCK_ROBUST) rather than this.
*/
#define USYNC_PROCESS_ROBUST 0x08
/*
* lwp_mutex_t flags
*/
#define LOCK_OWNERDEAD 0x1
#define LOCK_NOTRECOVERABLE 0x2
#define LOCK_INITED 0x4
#define LOCK_UNMAPPED 0x8
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SYNCH_H */
|
