/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef __ASM_GENERIC_MSGBUF_H
#define __ASM_GENERIC_MSGBUF_H

#include <asm/bitsperlong.h>
#include <asm/ipcbuf.h>

/*
 * generic msqid64_ds structure.
 *
 * Note extra padding because this structure is passed back and forth
 * between kernel and user space.
 *
 * msqid64_ds was originally meant to be architecture specific, but
 * everyone just ended up making identical copies without specific
 * optimizations, so we may just as well all use the same one.
 *
 * 64 bit architectures use a 64-bit long time field here, while
 * 32 bit architectures have a pair of unsigned long values.
 * On big-endian systems, the lower half is in the wrong place.
 *
 * Pad space is left for:
 * - 2 miscellaneous 32-bit values
 */

struct msqid64_ds {
        struct ipc64_perm msg_perm;
#if __BITS_PER_LONG == 64
        long             msg_stime;     /* last msgsnd time */
        long             msg_rtime;     /* last msgrcv time */
        long             msg_ctime;     /* last change time */
#else
        unsigned long   msg_stime;      /* last msgsnd time */
        unsigned long   msg_stime_high;
        unsigned long   msg_rtime;      /* last msgrcv time */
        unsigned long   msg_rtime_high;
        unsigned long   msg_ctime;      /* last change time */
        unsigned long   msg_ctime_high;
#endif
        unsigned long   msg_cbytes;     /* current number of bytes on queue */
        unsigned long   msg_qnum;       /* number of messages in queue */
        unsigned long    msg_qbytes;    /* max number of bytes on queue */
        __kernel_pid_t msg_lspid;       /* pid of last msgsnd */
        __kernel_pid_t msg_lrpid;       /* last receive pid */
        unsigned long    __unused4;
        unsigned long    __unused5;
};

#endif /* __ASM_GENERIC_MSGBUF_H */