Struct uniffi::ffi::Handle

#[repr(transparent)]
pub struct Handle(u64);

Object handle

Handles opaque u64 values used to pass objects across the FFI, both for objects implemented in Rust and ones implemented in the foreign language.

Rust handles are generated by leaking a raw pointer Foreign handles are generated with a handle map that only generates odd values. For all currently supported architectures and hopefully any ones we add in the future:

• 0 is an invalid value.
• The lowest bit will always be set for foreign handles and never set for Rust ones (since the leaked pointer will be aligned).

Rust handles are mainly managed is through the crate::HandleAlloc trait.

Tuple Fields

0: u64

Implementations

impl Handle

pub fn from_pointer<T>(ptr: *const T) -> Handle

pub fn as_pointer<T>(&self) -> *const T

pub fn from_raw(raw: u64) -> Option<Handle>

pub fn from_raw_unchecked(raw: u64) -> Handle

pub fn as_raw(&self) -> u64

Trait Implementations

impl Clone for Handle

fn clone(&self) -> Handle

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Handle

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

Formats the value using the given formatter.

impl Default for Handle

fn default() -> Handle

Returns the “default value” for a type.

impl FfiDefault for Handle

fn ffi_default() -> Handle

impl PartialEq<Handle> for Handle

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for Handle

impl Eq for Handle

impl StructuralEq for Handle

impl StructuralPartialEq for Handle