rt: update CurrentThread to use its own Handle #5023
Merged
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This is the next step in the internal runtime refactoring. This patch updates
CurrentThread
to useArc<Handle>
for all of its cross-thread needs instead ofArc<Shared>
.The effect of this change is that the current-thread scheduler only has a single
Arc
type, which includes the driver handles, keeping all "shared state" together.