| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| #ifndef __ASM_GENERIC_MSGBUF_H |
| #define __ASM_GENERIC_MSGBUF_H |
| |
| #include <asm/bitsperlong.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 */ |