Struct wasmer_vm::memory::VMMemory

source ·
pub struct VMMemory(pub Box<dyn LinearMemory + 'static>);
Expand description

Represents linear memory that can be either owned or shared

Tuple Fields§

§0: Box<dyn LinearMemory + 'static>

Implementations§

source§

impl VMMemory

source

pub fn new( memory: &MemoryType, style: &MemoryStyle, ) -> Result<Self, MemoryError>

Creates a new linear memory instance of the correct type with specified minimum and maximum number of wasm pages.

This creates a Memory with owned metadata: this can be used to create a memory that will be imported into Wasm modules.

source

pub fn get_runtime_size(&self) -> u32

Returns the number of pages in the allocated memory block

source

pub unsafe fn from_definition( memory: &MemoryType, style: &MemoryStyle, vm_memory_location: NonNull<VMMemoryDefinition>, ) -> Result<Self, MemoryError>

Create a new linear memory instance with specified minimum and maximum number of wasm pages.

This creates a Memory with metadata owned by a VM, pointed to by vm_memory_location: this can be used to create a local memory.

§Safety
  • vm_memory_location must point to a valid location in VM memory.
source

pub fn from_custom<IntoVMMemory>(memory: IntoVMMemory) -> Self
where IntoVMMemory: Into<Self>,

Creates VMMemory from a custom implementation - the following into implementations are natively supported

  • VMOwnedMemory -> VMMemory
  • Box<dyn LinearMemory + ’static> -> VMMemory
source

pub fn copy(&mut self) -> Result<Box<dyn LinearMemory + 'static>, MemoryError>

Copies this memory to a new memory

Trait Implementations§

source§

impl Debug for VMMemory

source§

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

Formats the value using the given formatter. Read more
source§

impl From<Box<dyn LinearMemory>> for VMMemory

source§

fn from(mem: Box<dyn LinearMemory + 'static>) -> Self

Converts to this type from the input type.
source§

impl From<VMOwnedMemory> for VMMemory

source§

fn from(mem: VMOwnedMemory) -> Self

Converts to this type from the input type.
source§

impl From<VMSharedMemory> for VMMemory

source§

fn from(mem: VMSharedMemory) -> Self

Converts to this type from the input type.
source§

impl LinearMemory for VMMemory

source§

fn ty(&self) -> MemoryType

Returns the type for this memory.

source§

fn size(&self) -> Pages

Returns the size of hte memory in pages

source§

fn grow(&mut self, delta: Pages) -> Result<Pages, MemoryError>

Grow memory by the specified amount of wasm pages.

Returns None if memory can’t be grown by the specified amount of wasm pages.

source§

fn grow_at_least(&mut self, min_size: u64) -> Result<(), MemoryError>

Grows the memory to at least a minimum size. If the memory is already big enough for the min size then this function does nothing

source§

fn reset(&mut self) -> Result<(), MemoryError>

Resets the memory down to a zero size

source§

fn style(&self) -> MemoryStyle

Returns the memory style for this memory.

source§

fn vmmemory(&self) -> NonNull<VMMemoryDefinition>

Return a VMMemoryDefinition for exposing the memory to compiled wasm code.

source§

fn try_clone(&self) -> Result<Box<dyn LinearMemory + 'static>, MemoryError>

Attempts to clone this memory (if its clonable)

source§

fn copy(&mut self) -> Result<Box<dyn LinearMemory + 'static>, MemoryError>

Copies this memory to a new memory

source§

fn do_notify(&mut self, dst: NotifyLocation, count: u32) -> u32

Notify waiters from the wait list. Return the number of waiters notified

source§

fn do_wait( &mut self, dst: NotifyLocation, timeout: Option<Duration>, ) -> Result<u32, WaiterError>

Add current thread to the waiter hash, and wait until notified or timout. Return 0 if the waiter has been notified, 2 if the timeout occured, or None if en error happened
source§

fn thread_conditions(&self) -> Option<&ThreadConditions>

Access the internal atomics handler. Read more
source§

impl StoreObject for VMMemory

source§

fn list(ctx: &StoreObjects) -> &Vec<Self>

source§

fn list_mut(ctx: &mut StoreObjects) -> &mut Vec<Self>

Auto Trait Implementations§

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
§

impl<T> ArchivePointee for T

§

type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.
§

fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

source§

fn into(self) -> U

Calls U::from(self).

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

§

impl<T> LayoutRaw for T

§

fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>

Returns the layout of the type.
§

impl<T> Pointee for T

§

type Metadata = ()

The metadata type for pointers and references to this type.
source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

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

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.