Struct dart_sys::Dart_CObject_Type

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

A Dart_CObject is used for representing Dart objects as native C data outside the Dart heap. These objects are totally detached from the Dart heap. Only a subset of the Dart objects have a representation as a Dart_CObject.

The string encoding in the ‘value.as_string’ is UTF-8.

All the different types from dart:typed_data are exposed as type kTypedData. The specific type from dart:typed_data is in the type field of the as_typed_data structure. The length in the as_typed_data structure is always in bytes.

The data for kTypedData is copied on message send and ownership remains with the caller. The ownership of data for kExternalTyped is passed to the VM on message send and returned when the VM invokes the Dart_HandleFinalizer callback; a non-NULL callback must be provided.

Note that Dart_CObject_kNativePointer is intended for internal use by dart:io implementation and has no connection to dart:ffi Pointer class. It represents a pointer to a native resource of a known type. The receiving side will only see this pointer as an integer and will not see the specified finalizer. The specified finalizer will only be invoked if the message is not delivered.

Tuple Fields

0: c_int

Trait Implementations

impl Clone for Dart_CObject_Type

fn clone(&self) -> Dart_CObject_Type

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Dart_CObject_Type

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

Formats the value using the given formatter.

impl Hash for Dart_CObject_Type

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 PartialEq for Dart_CObject_Type

fn eq(&self, other: &Dart_CObject_Type) -> 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 Dart_CObject_Type

impl Eq for Dart_CObject_Type

impl StructuralPartialEq for Dart_CObject_Type