1 #ifndef __ASM_GENERIC_MSGBUF_H
2 #define __ASM_GENERIC_MSGBUF_H
3
4 #include <asm/bitsperlong.h>
5 /*
6 * generic msqid64_ds structure.
7 *
8 * Note extra padding because this structure is passed back and forth
9 * between kernel and user space.
10 *
11 * msqid64_ds was originally meant to be architecture specific, but
12 * everyone just ended up making identical copies without specific
13 * optimizations, so we may just as well all use the same one.
14 *
15 * 64 bit architectures typically define a 64 bit __kernel_time_t,
16 * so they do not need the first three padding words.
17 * On big-endian systems, the padding is in the wrong place.
18 *
19 * Pad space is left for:
20 * - 64-bit time_t to solve y2038 problem
21 * - 2 miscellaneous 32-bit values
22 */
23
24 struct msqid64_ds {
25 struct ipc64_perm msg_perm;
26 __kernel_time_t msg_stime; /* last msgsnd time */
27 #if __BITS_PER_LONG != 64
28 unsigned long __unused1;
29 #endif
30 __kernel_time_t msg_rtime; /* last msgrcv time */
31 #if __BITS_PER_LONG != 64
32 unsigned long __unused2;
33 #endif
34 __kernel_time_t msg_ctime; /* last change time */
35 #if __BITS_PER_LONG != 64
36 unsigned long __unused3;
37 #endif
38 unsigned long msg_cbytes; /* current number of bytes on queue */
39 unsigned long msg_qnum; /* number of messages in queue */
40 unsigned long msg_qbytes; /* max number of bytes on queue */
41 __kernel_pid_t msg_lspid; /* pid of last msgsnd */
42 __kernel_pid_t msg_lrpid; /* last receive pid */
43 unsigned long __unused4;
44 unsigned long __unused5;
45 };
46
47 #endif /* __ASM_GENERIC_MSGBUF_H */
48
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