Struct kernel::file::File

#[repr(transparent)]
pub struct File(_);

Wraps the kernel’s struct file.

Invariants

Instances of this type are always ref-counted, that is, a call to get_file ensures that the allocation remains valid at least until the matching call to fput.

Implementations

impl File

pub fn from_fd(fd: u32) -> Result<ARef<Self>>

Constructs a new [struct file] wrapper from a file descriptor.

The file descriptor belongs to the current process.

pub fn pos(&self) -> u64

Returns the current seek/cursor/pointer position (struct file::f_pos).

pub fn cred(&self) -> &Credential

Returns the credentials of the task that originally opened the file.

pub fn flags(&self) -> u32

Returns the flags associated with the file.

The flags are a combination of the constants in flags.

Trait Implementations

impl AlwaysRefCounted for File

fn inc_ref(&self)

Increments the reference count on the object.

unsafe fn dec_ref(obj: NonNull<Self>)

Decrements the reference count on the object.