Struct wasmi::Store

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pub struct Store<T> { /* private fields */ }
Expand description

The store that owns all data associated to Wasm modules.

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impl<T> Store<T>

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pub fn new(engine: &Engine, data: T) -> Self

Creates a new store.

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pub fn engine(&self) -> &Engine

Returns the Engine that this store is associated with.

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pub fn data(&self) -> &T

Returns a shared reference to the user provided data owned by this Store.

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pub fn data_mut(&mut self) -> &mut T

Returns an exclusive reference to the user provided data owned by this Store.

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pub fn into_data(self) -> T

Consumes self and returns its user provided data.

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pub fn limiter( &mut self, limiter: impl FnMut(&mut T) -> &mut dyn ResourceLimiter + Send + Sync + 'static )

Installs a function into the Store that will be called with the user data type T to retrieve a ResourceLimiter any time a limited, growable resource such as a linear memory or table is grown.

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pub fn add_fuel(&mut self, delta: u64) -> Result<(), FuelError>

Adds delta quantity of fuel to the remaining fuel.

Panics

If this overflows the remaining fuel counter.

Errors

If fuel metering is disabled.

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pub fn fuel_consumed(&self) -> Option<u64>

Returns the amount of fuel consumed by executions of the Store so far.

Returns None if fuel metering is disabled.

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pub fn consume_fuel(&mut self, delta: u64) -> Result<u64, FuelError>

Synthetically consumes an amount of fuel for the Store.

Returns the remaining amount of fuel after this operation.

Panics

If this overflows the consumed fuel counter.

Errors
  • If fuel metering is disabled.
  • If more fuel is consumed than available.

Trait Implementations§

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impl<T> AsContext for Store<T>

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type UserState = T

The user state associated with the Store, aka the T in Store<T>.
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fn as_context(&self) -> StoreContext<'_, Self::UserState>

Returns the store context that this type provides access to.
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impl<T> AsContextMut for Store<T>

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fn as_context_mut(&mut self) -> StoreContextMut<'_, Self::UserState>

Returns the store context that this type provides access to.
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impl<T: Debug> Debug for Store<T>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<T> !RefUnwindSafe for Store<T>

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impl<T> Send for Store<T>where T: Send,

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impl<T> Sync for Store<T>where T: Sync,

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impl<T> Unpin for Store<T>where T: Unpin,

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impl<T> !UnwindSafe for Store<T>

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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<T> Downcast for Twhere T: Any,

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fn into_any(self: Box<T, Global>) -> Box<dyn Any, Global>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T, Global>) -> Rc<dyn Any, Global>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> DowncastSync for Twhere T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T, Global>) -> Arc<dyn Any + Send + Sync, Global>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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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 Twhere 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, U> TryFrom<U> for Twhere 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 Twhere 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.