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01: #ifndef __ASM_GENERIC_MSGBUF_H
02: #define __ASM_GENERIC_MSGBUF_H
03: 
04: #include <asm/bitsperlong.h>
05: /*
06:  * generic msqid64_ds structure.
07:  *
08:  * Note extra padding because this structure is passed back and forth
09:  * 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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