devela::_dep::nc

Struct shmid64_ds_t

#[repr(C)]
pub struct shmid64_ds_t {
    pub shm_perm: ipc64_perm_t,
    pub shm_segsz: usize,
    pub shm_atime: isize,
    pub shm_dtime: isize,
    pub shm_ctime: isize,
    pub shm_cpid: i32,
    pub shm_lpid: i32,
    pub shm_nattch: usize,
    /* private fields */
}
Available on crate feature dep_nc only.
Expand description

The shmid64_ds structure for x86 architecture. Note extra padding because this structure is passed back and forth between kernel and user space.

shmid64_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 typically define a 64 bit __kernel_time_t, so they do not need the first two padding words. On big-endian systems, the padding is in the wrong place.

Pad space is left for:

  • 2 miscellaneous 32-bit values

Fields§

§shm_perm: ipc64_perm_t

operation perms

§shm_segsz: usize

size of segment (bytes)

§shm_atime: isize

last attach time

§shm_dtime: isize

last detach time

§shm_ctime: isize

last change time

§shm_cpid: i32

pid of creator

§shm_lpid: i32

pid of last operator

§shm_nattch: usize

no. of current attaches

Trait Implementations§

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impl Clone for shmid64_ds_t

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fn clone(&self) -> shmid64_ds_t

Returns a copy of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for shmid64_ds_t

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error> ⓘ

Formats the value using the given formatter. Read more
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impl Default for shmid64_ds_t

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fn default() -> shmid64_ds_t

Returns the “default value” for a type. Read more
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impl Copy for shmid64_ds_t

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