Struct sc_executor_common::runtime_blob::GlobalsSnapshot

pub struct GlobalsSnapshot<Global>(_);

A snapshot of a global variables values. This snapshot can be later used for restoring the values to the preserved state.

Technically, a snapshot stores only values of mutable global variables. This is because immutable global variables always have the same values.

We take it from an instance rather from a module because the start function could potentially change any of the mutable global values.

Implementations

impl<Global> GlobalsSnapshot<Global>

pub fn take<Instance>(
    mutable_globals: &ExposedMutableGlobalsSet,
    instance: &Instance
) -> Self where
    Instance: InstanceGlobals<Global = Global>, 

Take a snapshot of global variables for a given instance.

Panics

This function panics if the instance doesn’t correspond to the module from which the ExposedMutableGlobalsSet was collected.

pub fn apply<Instance>(&self, instance: &Instance) where
    Instance: InstanceGlobals<Global = Global>, 

Apply the snapshot to the given instance.

This instance must be the same that was used for creation of this snapshot.