Struct Pointer 

pub struct Pointer<T> { /* private fields */ }

Type to represent a pointer in wasm at the host.

Implementations

impl<T> Pointer<T>

where T: PointerType,

pub fn new(ptr: u32) -> Pointer<T>

Create a new instance of Self.

pub fn offset(self, offset: u32) -> Option<Pointer<T>>

Calculate the offset from this pointer.

offset is in units of T. So, 3 means 3 * mem::size_of::<T>() as offset to the pointer.

Returns an Option to respect that the pointer could probably overflow.

pub fn null() -> Pointer<T>

Create a null pointer.

pub fn cast<R>(self) -> Pointer<R>

where R: PointerType,

Cast this pointer of type T to a pointer of type R.

Trait Implementations

impl<T> Clone for Pointer<T>

fn clone(&self) -> Pointer<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for Pointer<T>

where T: Debug,

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

Formats the value using the given formatter.

impl<T> From<Pointer<T>> for u32

where T: PointerType,

fn from(ptr: Pointer<T>) -> u32

Converts to this type from the input type.

impl<T> From<Pointer<T>> for u64

where T: PointerType,

fn from(ptr: Pointer<T>) -> u64

Converts to this type from the input type.

impl<T> From<u32> for Pointer<T>

where T: PointerType,

fn from(ptr: u32) -> Pointer<T>

Converts to this type from the input type.

impl<'a, T> FromFFIValue<'a> for Pointer<T>

where T: PointerType,

Available on non-substrate_runtime only.

type Owned = Pointer<T>

The owned inner type.

fn from_ffi_value( _: &mut dyn FunctionContext, arg: u32, ) -> Result<Pointer<T>, String>

Creates Self::Owned from the given arg received through the FFI boundary from the runtime.

fn take_from_owned( owned: &'a mut <Pointer<T> as FromFFIValue<'a>>::Owned, ) -> <Pointer<T> as RIType>::Inner

Creates Self::Inner from an owned value.

fn write_back_into_runtime( _value: Self::Owned, _context: &mut dyn FunctionContext, _arg: Self::FFIType, ) -> Result<(), String>

Write back a modified value back into the runtime’s memory.

impl<T> IntoFFIValue for Pointer<T>

where T: PointerType,

Available on non-substrate_runtime only.

fn into_ffi_value( value: Pointer<T>, _: &mut dyn FunctionContext, ) -> Result<u32, String>

Convert Self::Inner into an FFI value.

impl<T> IntoValue for Pointer<T>

where T: PointerType,

const VALUE_TYPE: ValueType = ValueType::I32

The type of the value in wasm.

fn into_value(self) -> Value

Convert self into a wasm Value.

impl<T> PartialEq for Pointer<T>

where T: PartialEq,

fn eq(&self, other: &Pointer<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

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

impl<T> RIType for Pointer<T>

where T: PointerType,

Available on non-substrate_runtime only.

type FFIType = u32

The raw FFI type that is used to pass Self through the host <-> runtime boundary.

type Inner = Pointer<T>

The inner type without any serialization strategy wrapper.

impl<T> TryFromValue for Pointer<T>

where T: PointerType,

fn try_from_value(val: Value) -> Option<Pointer<T>>

Try to convert the given Value into Self.

impl<T> Copy for Pointer<T>

impl<T> Eq for Pointer<T>

where T: Eq,

impl<T> StructuralPartialEq for Pointer<T>