Struct FutexWakeCount 

pub struct FutexWakeCount(/* private fields */);

Nombre de waiters à réveiller par futex_wake (val de FUTEX_WAKE).

Le val de FUTEX_WAKE est interprété comme un int (signé 32 bits) par le noyau : seules les valeurs [0, INT_MAX] ont un sens. Ce newtype borne par construction (« parse, don’t validate », Principe 4) la valeur à INT_MAX (0x7fff_ffff) — FutexWakeCount::new clampe toute valeur plus grande. Le wrapper syscall n’a donc jamais à gérer une conversion qui échoue.

Réveiller INT_MAX waiters équivaut à « réveiller tous les waiters » : c’est l’idiome FutexWakeCount::ALL.

Implementations

impl FutexWakeCount

pub const ONE: Self

Réveille un seul waiter (le cas d’un Mutex qui relâche son verrou).

pub const ALL: Self

Réveille tous les waiters (valeur noyau INT_MAX) — le cas d’un Condvar::notify_all ou d’un barrage qui s’ouvre.

pub const fn new(count: u32) -> Self

Construit un compte de réveil, clampé à INT_MAX (Principe 4 : l’invariant ≤ INT_MAX est garanti par construction, jamais revalidé).

pub const fn get(self) -> u32

Valeur brute (u32), garantie dans [0, INT_MAX].

Trait Implementations

impl Clone for FutexWakeCount

fn clone(&self) -> FutexWakeCount

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FutexWakeCount

impl Debug for FutexWakeCount

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

Formats the value using the given formatter.

impl Eq for FutexWakeCount

impl Hash for FutexWakeCount

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for FutexWakeCount

fn cmp(&self, other: &FutexWakeCount) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for FutexWakeCount

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for FutexWakeCount

fn partial_cmp(&self, other: &FutexWakeCount) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for FutexWakeCount