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59 lines
1.8 KiB
59 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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#ifndef __ASM_GENERIC_SHMBUF_H |
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#define __ASM_GENERIC_SHMBUF_H |
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#include <asm/bitsperlong.h> |
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/* |
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* The shmid64_ds structure for x86 architecture. |
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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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* shmid64_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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* |
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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 shmid64_ds { |
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struct ipc64_perm shm_perm; /* operation perms */ |
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size_t shm_segsz; /* size of segment (bytes) */ |
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#if __BITS_PER_LONG == 64 |
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long shm_atime; /* last attach time */ |
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long shm_dtime; /* last detach time */ |
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long shm_ctime; /* last change time */ |
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#else |
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unsigned long shm_atime; /* last attach time */ |
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unsigned long shm_atime_high; |
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unsigned long shm_dtime; /* last detach time */ |
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unsigned long shm_dtime_high; |
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unsigned long shm_ctime; /* last change time */ |
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unsigned long shm_ctime_high; |
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#endif |
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__kernel_pid_t shm_cpid; /* pid of creator */ |
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__kernel_pid_t shm_lpid; /* pid of last operator */ |
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unsigned long shm_nattch; /* no. of current attaches */ |
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unsigned long __unused4; |
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unsigned long __unused5; |
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}; |
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struct shminfo64 { |
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unsigned long shmmax; |
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unsigned long shmmin; |
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unsigned long shmmni; |
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unsigned long shmseg; |
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unsigned long shmall; |
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unsigned long __unused1; |
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unsigned long __unused2; |
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unsigned long __unused3; |
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unsigned long __unused4; |
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}; |
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#endif /* __ASM_GENERIC_SHMBUF_H */
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