Struct FuelHandles

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pub struct FuelHandles {
    pub budget: u64,
    pub remaining: Rc<Cell<u64>>,
    pub exhausted: Rc<Cell<bool>>,
}

Expand description

The shared fuel cell for one budgeted run, and its structured verdict.

Install with install_fuel before starting an engine, read exhausted/remaining after it returns, and clear_fuel when done. The boundary never string-sniffs: exhausted IS the budget-exceeded signal.

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§budget: u64

The installed budget, for messages and steps_used accounting.

§remaining: Rc<Cell<u64>>

Steps left; zero once exhausted.

§exhausted: Rc<Cell<bool>>

Set at the deterministic op where the budget ran dry.

Implementations§

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impl FuelHandles

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pub fn exhaust_message(&self) -> String

The engine-agnostic exhaustion story (tree-walker and VM agree).

Trait Implementations§

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impl Clone for FuelHandles

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fn clone(&self) -> FuelHandles

Returns a duplicate of the value. Read more

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

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl !UnwindSafe for FuelHandles

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<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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

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

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>) -> Rc<dyn Any>

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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