Struct SelectFlags 

#[repr(transparent)]
pub struct SelectFlags(pub c_int);

Mode flags for select. Combine with |.

For example SelectFlags::READ | SelectFlags::CUSTOM_MSG. Defined in erl_drv_nif.h; each flag carries its own introduction version, as the cancel, custom-message, and error modes were added after the base ones.

ErlNifSelectFlags — NIF 2.12 — OTP 20

Tuple Fields

0: c_int

Implementations

impl SelectFlags

pub const READ: Self

Select for read readiness.

ERL_NIF_SELECT_READ — NIF 2.12 — OTP 20

pub const WRITE: Self

Select for write readiness.

ERL_NIF_SELECT_WRITE — NIF 2.12 — OTP 20

pub const STOP: Self

Stop selecting on the event and trigger the resource stop callback.

The safe way to retire an OS event before closing it: any active read/write selections are cancelled first, then the resource’s stop callback is called — directly or scheduled — once no notification can still be in flight. The event must not be closed until that callback has run. pid and ref are ignored.

ERL_NIF_SELECT_STOP — NIF 2.12 — OTP 20

pub const CANCEL: Self

Cancel a pending read or write select without stopping.

Combine with SelectFlags::READ and/or SelectFlags::WRITE to choose which selections to cancel; pid and ref are ignored. The return value’s *_CANCELLED bits report whether each was actually removed or whether a notification may already have been sent.

ERL_NIF_SELECT_CANCEL — NIF 2.15 — OTP 22

pub const CUSTOM_MSG: Self

Deliver msg as a custom message instead of the default select message.

ERL_NIF_SELECT_CUSTOM_MSG — NIF 2.15 — OTP 22

pub const ERROR: Self

Select for error conditions on the event.

ERL_NIF_SELECT_ERROR — NIF 2.16 — OTP 24

Trait Implementations

impl BitOr for SelectFlags

type Output = SelectFlags

The resulting type after applying the | operator.

fn bitor(self, rhs: Self) -> Self

Performs the | operation.

impl Clone for SelectFlags

fn clone(&self) -> SelectFlags

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SelectFlags

impl Eq for SelectFlags

impl PartialEq for SelectFlags

fn eq(&self, other: &SelectFlags) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for SelectFlags