1 | /* Copyright (C) 1995-2020 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #ifndef _SYS_MSG_H |
19 | # error "Never use <bits/msq.h> directly; include <sys/msg.h> instead." |
20 | #endif |
21 | |
22 | #include <bits/types.h> |
23 | #include <bits/msq-pad.h> |
24 | |
25 | /* Define options for message queue functions. */ |
26 | #define MSG_NOERROR 010000 /* no error if message is too big */ |
27 | #ifdef __USE_GNU |
28 | # define MSG_EXCEPT 020000 /* recv any msg except of specified type */ |
29 | # define MSG_COPY 040000 /* copy (not remove) all queue messages */ |
30 | #endif |
31 | |
32 | /* Types used in the structure definition. */ |
33 | typedef __syscall_ulong_t msgqnum_t; |
34 | typedef __syscall_ulong_t msglen_t; |
35 | |
36 | #if __MSQ_PAD_BEFORE_TIME |
37 | # define __MSQ_PAD_TIME(NAME, RES) \ |
38 | unsigned long int __glibc_reserved ## RES; __time_t NAME |
39 | #elif __MSQ_PAD_AFTER_TIME |
40 | # define __MSQ_PAD_TIME(NAME, RES) \ |
41 | __time_t NAME; unsigned long int __glibc_reserved ## RES |
42 | #else |
43 | # define __MSQ_PAD_TIME(NAME, RES) \ |
44 | __time_t NAME |
45 | #endif |
46 | |
47 | /* Structure of record for one message inside the kernel. |
48 | The type `struct msg' is opaque. */ |
49 | struct msqid_ds |
50 | { |
51 | struct ipc_perm msg_perm; /* structure describing operation permission */ |
52 | __MSQ_PAD_TIME (msg_stime, 1); /* time of last msgsnd command */ |
53 | __MSQ_PAD_TIME (msg_rtime, 2); /* time of last msgrcv command */ |
54 | __MSQ_PAD_TIME (msg_ctime, 3); /* time of last change */ |
55 | __syscall_ulong_t __msg_cbytes; /* current number of bytes on queue */ |
56 | msgqnum_t msg_qnum; /* number of messages currently on queue */ |
57 | msglen_t msg_qbytes; /* max number of bytes allowed on queue */ |
58 | __pid_t msg_lspid; /* pid of last msgsnd() */ |
59 | __pid_t msg_lrpid; /* pid of last msgrcv() */ |
60 | __syscall_ulong_t __glibc_reserved4; |
61 | __syscall_ulong_t __glibc_reserved5; |
62 | }; |
63 | |
64 | #ifdef __USE_MISC |
65 | |
66 | # define msg_cbytes __msg_cbytes |
67 | |
68 | /* ipcs ctl commands */ |
69 | # define MSG_STAT 11 |
70 | # define MSG_INFO 12 |
71 | # define MSG_STAT_ANY 13 |
72 | |
73 | /* buffer for msgctl calls IPC_INFO, MSG_INFO */ |
74 | struct msginfo |
75 | { |
76 | int msgpool; |
77 | int msgmap; |
78 | int msgmax; |
79 | int msgmnb; |
80 | int msgmni; |
81 | int msgssz; |
82 | int msgtql; |
83 | unsigned short int msgseg; |
84 | }; |
85 | |
86 | #endif /* __USE_MISC */ |
87 | |