Struct Pid 

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

Identifiant kernel d’un processus (pid_t).

Garanti strictement positif par le kernel Linux : un PID nul ne désigne jamais un processus réel (cf. getpid(2)). Le wrapper NonZeroI32 encode cet invariant dans le type, ce qui permet à Option<Pid> d’occuper la même taille que Pid. La convention 1 de l’ADR-021 exploite cette propriété pour remplacer les sentinelles kernel (0 = « processus courant ») par None.

Implementations

impl Pid

pub const fn from_nonzero(raw: NonZeroI32) -> Self

Construit un Pid à partir d’une valeur déjà validée.

Réservé aux producteurs qui ont déjà la garantie que la valeur vient du kernel et est strictement positive (par exemple le wrapper getpid de la couche 0).

pub const fn try_from_raw(raw: i32) -> Option<Self>

Tente de construire un Pid à partir d’un i32 brut.

Retourne None si la valeur est négative ou nulle, deux cas qui n’identifient pas un processus valide.

pub const fn as_raw(self) -> i32

Retourne la représentation brute (i32) du PID.

L’expose pour l’interfaçage avec les wrappers de syscalls et les affichages humains ; éviter de manipuler des i32 nus dans le reste du code (convention « newtypes systématiques »).

Trait Implementations

impl Clone for Pid

fn clone(&self) -> Pid

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Pid

impl Debug for Pid

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

Formats the value using the given formatter.

impl Eq for Pid

impl Hash for Pid

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 Pid

fn cmp(&self, other: &Pid) -> 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 Pid

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Pid

fn partial_cmp(&self, other: &Pid) -> 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 Pid