50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef __ASM_GENERIC_MSGBUF_H
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#define __ASM_GENERIC_MSGBUF_H
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#include <asm/bitsperlong.h>
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#include <asm/ipcbuf.h>
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/*
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* generic msqid64_ds structure.
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*
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* Note extra padding because this structure is passed back and forth
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* between kernel and user space.
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*
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* msqid64_ds was originally meant to be architecture specific, but
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* everyone just ended up making identical copies without specific
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* optimizations, so we may just as well all use the same one.
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*
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* 64 bit architectures use a 64-bit long time field here, while
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* 32 bit architectures have a pair of unsigned long values.
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* On big-endian systems, the lower half is in the wrong place.
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*
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* Pad space is left for:
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* - 2 miscellaneous 32-bit values
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*/
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struct msqid64_ds {
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struct ipc64_perm msg_perm;
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#if __BITS_PER_LONG == 64
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long msg_stime; /* last msgsnd time */
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long msg_rtime; /* last msgrcv time */
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long msg_ctime; /* last change time */
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#else
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unsigned long msg_stime; /* last msgsnd time */
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unsigned long msg_stime_high;
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unsigned long msg_rtime; /* last msgrcv time */
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unsigned long msg_rtime_high;
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unsigned long msg_ctime; /* last change time */
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unsigned long msg_ctime_high;
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#endif
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unsigned long msg_cbytes; /* current number of bytes on queue */
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unsigned long msg_qnum; /* number of messages in queue */
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unsigned long msg_qbytes; /* max number of bytes on queue */
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__kernel_pid_t msg_lspid; /* pid of last msgsnd */
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__kernel_pid_t msg_lrpid; /* last receive pid */
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unsigned long __unused4;
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unsigned long __unused5;
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};
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#endif /* __ASM_GENERIC_MSGBUF_H */
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