Struct linera_witty::Memory

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pub struct Memory<'runtime, Instance>
where Instance: CabiReallocAlias + CabiFreeAlias,
{ /* private fields */ }
Expand description

A handle to interface with a guest Wasm module instance’s memory.

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impl<Instance> Memory<'_, Instance>
where Instance: CabiReallocAlias + CabiFreeAlias, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

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pub fn read( &self, location: GuestPointer, length: u32, ) -> Result<Cow<'_, [u8]>, RuntimeError>

Reads length bytes from location.

The underlying runtime may return either a memory slice or an owned buffer.

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pub fn write( &mut self, location: GuestPointer, bytes: &[u8], ) -> Result<(), RuntimeError>

Writes bytes to location.

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pub fn allocate(&mut self, size: u32) -> Result<GuestPointer, RuntimeError>

Returns a newly allocated buffer of size bytes in the guest module’s memory.

Calls the guest module to allocate the memory, so the resulting allocation is managed by the guest.

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pub fn deallocate( &mut self, allocation: GuestPointer, ) -> Result<(), RuntimeError>

Deallocates the allocation managed by the guest.

Auto Trait Implementations§

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impl<'runtime, Instance> Freeze for Memory<'runtime, Instance>

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impl<'runtime, Instance> RefUnwindSafe for Memory<'runtime, Instance>

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impl<'runtime, Instance> Send for Memory<'runtime, Instance>
where <<Instance as Instance>::Runtime as Runtime>::Memory: Send, Instance: Send, <Instance as InstanceWithFunction<HCons<i32, HCons<i32, HCons<i32, HCons<i32, HNil>>>>, HCons<i32, HNil>>>::Function: Send, <Instance as InstanceWithFunction<HCons<i32, HNil>, HNil>>::Function: Send,

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impl<'runtime, Instance> Sync for Memory<'runtime, Instance>
where <<Instance as Instance>::Runtime as Runtime>::Memory: Sync, Instance: Sync, <Instance as InstanceWithFunction<HCons<i32, HCons<i32, HCons<i32, HCons<i32, HNil>>>>, HCons<i32, HNil>>>::Function: Sync, <Instance as InstanceWithFunction<HCons<i32, HNil>, HNil>>::Function: Sync,

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impl<'runtime, Instance> Unpin for Memory<'runtime, Instance>

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impl<'runtime, Instance> !UnwindSafe for Memory<'runtime, Instance>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<Choices> CoproductSubsetter<CNil, HNil> for Choices

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type Remainder = Choices

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fn subset( self, ) -> Result<CNil, <Choices as CoproductSubsetter<CNil, HNil>>::Remainder>

Extract a subset of the possible types in a coproduct (or get the remaining possibilities) Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T, U, I> LiftInto<U, I> for T
where U: LiftFrom<T, I>,

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fn lift_into(self) -> U

Performs the indexed conversion.
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impl<M, I> RuntimeMemory<&mut I> for M
where M: RuntimeMemory<I>,

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fn read<'instance>( &self, instance: &'instance &mut I, location: GuestPointer, length: u32, ) -> Result<Cow<'instance, [u8]>, RuntimeError>

Reads length bytes from memory from the provided location.

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fn write( &mut self, instance: &mut &mut I, location: GuestPointer, bytes: &[u8], ) -> Result<(), RuntimeError>

Writes the bytes to memory at the provided location.

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impl<Source> Sculptor<HNil, HNil> for Source

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type Remainder = Source

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fn sculpt(self) -> (HNil, <Source as Sculptor<HNil, HNil>>::Remainder)

Consumes the current HList and returns an HList with the requested shape. Read more
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impl<AnyTail> Split<HNil> for AnyTail

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type Remainder = AnyTail

The tail of remaining elements after splitting up the list.
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fn split(self) -> (HNil, <AnyTail as Split<HNil>>::Remainder)

Splits the current heterogeneous list in two.
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.