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