Struct ResidentOwner 

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

Identity of one backend instance’s resident buffer namespace.

Resident buffer ids come from a counter private to a backend instance, so two live instances hand out the same ids for unrelated device memory. An owner makes those namespaces distinguishable, which is what lets a handle be checked instead of merely trusted.

Implementations

impl ResidentOwner

pub fn new() -> Result<Self, BackendError>

Mint an identity for a new backend instance.

Errors

Returns BackendError::InvalidProgram if the process has exhausted the owner id space, which is refused rather than wrapped: a wrapped id would silently authorize a foreign handle.

pub fn get(self) -> u64

Raw identity value, for diagnostics and stable ordering.

pub fn handle(self, id: u64) -> ResidentHandle

Mint a handle in this owner’s namespace.

pub fn resolve( self, handle: ResidentHandle, context: &str, ) -> Result<u64, BackendError>

Unwrap a handle minted by this owner, refusing a foreign one.

context names the operation for the error message, for example "CUDA resident upload".

Errors

Returns BackendError::InvalidProgram if handle was minted by a different backend instance. Resolving it by bare id instead would find this instance’s unrelated buffer of the same id and read or write the wrong device memory without any diagnostic.

Trait Implementations

impl Clone for ResidentOwner

fn clone(&self) -> ResidentOwner

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ResidentOwner

impl Debug for ResidentOwner

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

Formats the value using the given formatter.

impl Eq for ResidentOwner

impl Hash for ResidentOwner

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 ResidentOwner

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

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for ResidentOwner

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