Struct ShmObject 

pub struct ShmObject {
    pub name: String,
    pub id: u64,
    pub size: usize,
    pub phys_frame: usize,
    pub num_frames: usize,
    pub ref_count: AtomicU32,
    pub mappings: Mutex<BTreeMap<u64, ShmMapping>>,
    pub owner: ProcessId,
    pub unlinked: bool,
}

A named shared memory object.

Fields

name: String

Object name (without leading slash).

id: u64

Unique object ID.

size: usize

Size in bytes (set by ftruncate).

phys_frame: usize

Physical frame number of the backing memory (contiguous).

num_frames: usize

Number of physical frames allocated.

ref_count: AtomicU32

Reference count (number of open descriptors).

mappings: Mutex<BTreeMap<u64, ShmMapping>>

Per-process virtual mappings.

owner: ProcessId

Creator process ID.

unlinked: bool

Whether the object has been unlinked (will be destroyed when ref_count reaches 0).