blob: c11fb81a82d83b6c53eedbae6a97a230a2d227b8 (
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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
* 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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_MSG_IMPL_H
#define _SYS_MSG_IMPL_H
#include <sys/ipc_impl.h>
#if defined(_KERNEL) || defined(_KMEMUSER)
#include <sys/msg.h>
#include <sys/t_lock.h>
#include <sys/list.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* Argument vectors for the various flavors of msgsys().
*/
#define MSGGET 0
#define MSGCTL 1
#define MSGRCV 2
#define MSGSND 3
#define MSGIDS 4
#define MSGSNAP 5
#if defined(_KERNEL) || defined(_KMEMUSER)
typedef struct msgq_wakeup {
list_node_t msgw_list;
long msgw_type; /* Message type request. */
long msgw_snd_wake; /* Type of msg from msgsnd */
size_t msgw_snd_size; /* Designates size of the msg sending */
kthread_t *msgw_thrd; /* Thread waiting */
kcondvar_t msgw_wake_cv; /* waiting on this */
} msgq_wakeup_t;
typedef struct msg_select {
msgq_wakeup_t *(*selection)();
struct msg_select *next_selection;
} msg_select_t;
/*
* There is one msg structure for each message in the system.
*/
struct msg {
list_node_t msg_node; /* message list node */
long msg_type; /* message type */
size_t msg_size; /* message text size */
void *msg_addr; /* message text address */
long msg_flags; /* message flags */
long msg_copycnt; /* current # of copyouts on message */
};
/*
* Per message flags
*/
#define MSG_RCVCOPY 00001 /* msgrcv is copying out this message */
#define MSG_UNLINKED 00002 /* msg has been unlinked from queue */
/*
* msg_rcv_cv is now an array of kcondvar_t for performance reason.
* We use multiple condition variables (kcondvar_t) to avoid needing
* to wake all readers when sending a single message.
*/
#define MSG_NEG_INTERVAL 8
#define MSG_MAX_QNUM 64
#define MSG_MAX_QNUM_CV 65
typedef struct kmsqid {
kipc_perm_t msg_perm; /* operation permission struct */
list_t msg_list; /* list of messages on q */
msglen_t msg_cbytes; /* current # bytes on q */
msgqnum_t msg_qnum; /* # of messages on q */
msgqnum_t msg_qmax; /* max # of messages on q */
msglen_t msg_qbytes; /* max # of bytes on q */
pid_t msg_lspid; /* pid of last msgsnd */
pid_t msg_lrpid; /* pid of last msgrcv */
time_t msg_stime; /* last msgsnd time */
time_t msg_rtime; /* last msgrcv time */
time_t msg_ctime; /* last change time */
uint_t msg_snd_cnt; /* # of waiting senders */
uint_t msg_rcv_cnt; /* # of waiting receivers */
uint64_t msg_lowest_type; /* Smallest type on queue */
/*
* linked list of routines used to determine what to wake up next.
* msg_fnd_sndr: Routines for waking up readers waiting
* for a message from the sender.
* msg_fnd_rdr: Routines for waking up readers waiting
* for a copyout to finish.
*/
msg_select_t *msg_fnd_sndr;
msg_select_t *msg_fnd_rdr;
/*
* Various counts and queues for controlling the sleeping
* and waking up of processes that are waiting for various
* message queue events.
*
* msg_cpy_block: List of receiving threads that are blocked because
* the message of choice is being copied out.
* msg_wait_snd: List of receiving threads whose type specifier
* is positive or 0 but are blocked because there
* are no matches.
* msg_wait_snd_ngt:
* List of receiving threads whose type specifier is
* negative message type but are blocked because
* there are no types that qualify.
* msg_wait_rcv: List of sending threads that are blocked because
* there is no room left on the message queue.
*/
kcondvar_t msg_snd_cv;
list_t msg_cpy_block;
list_t msg_wait_snd[MSG_MAX_QNUM_CV];
list_t msg_wait_snd_ngt[MSG_MAX_QNUM_CV];
list_t msg_wait_rcv;
size_t msg_snd_smallest; /* Smallest msg on send wait list */
int msg_ngt_cnt; /* # of negative receivers blocked */
char msg_neg_copy; /* Neg type copy underway */
} kmsqid_t;
#endif /* _KERNEL */
#if defined(_SYSCALL32)
/*
* LP64 view of the ILP32 msgbuf structure
*/
struct ipcmsgbuf32 {
int32_t mtype; /* message type */
char mtext[1]; /* message text */
};
/*
* LP64 view of the ILP32 msgsnap_head and msgsnap_mhead structures
*/
struct msgsnap_head32 {
size32_t msgsnap_size; /* bytes consumed/required in the buffer */
size32_t msgsnap_nmsg; /* number of messages in the buffer */
};
struct msgsnap_mhead32 {
size32_t msgsnap_mlen; /* number of bytes in message that follows */
int32_t msgsnap_mtype; /* message type */
};
/*
* LP64 view of the ILP32 msqid_ds structure
*/
struct msqid_ds32 {
struct ipc_perm32 msg_perm; /* operation permission struct */
caddr32_t msg_first; /* ptr to first message on q */
caddr32_t msg_last; /* ptr to last message on q */
uint32_t msg_cbytes; /* current # bytes on q */
uint32_t msg_qnum; /* # of messages on q */
uint32_t msg_qbytes; /* max # of bytes on q */
pid32_t msg_lspid; /* pid of last msgsnd */
pid32_t msg_lrpid; /* pid of last msgrcv */
time32_t msg_stime; /* last msgsnd time */
int32_t msg_pad1; /* reserved for time_t expansion */
time32_t msg_rtime; /* last msgrcv time */
int32_t msg_pad2; /* time_t expansion */
time32_t msg_ctime; /* last change time */
int32_t msg_pad3; /* time expansion */
int16_t msg_cv;
int16_t msg_qnum_cv;
int32_t msg_pad4[3]; /* reserve area */
};
#endif /* _SYSCALL32 */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_MSG_IMPL_H */
|
