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PinToken

uni_store::runtime::l0_manager

Struct PinToken 

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pub struct PinToken(/* private fields */);
Expand description

Per-generation pin marker for snapshot isolation (Component C1).

Held by exactly two classes: the L0Manager keeps one clone for the current generation, and every live SnapshotView holds one. So Arc::strong_count on the manager’s clone is 1 + (live snapshots of the current generation), which L0Manager::is_current_pinned uses to decide whether a commit must freeze the generation aside before mutating it. The private field stops any other code from minting a token and breaking that invariant.

Always compiled (so the inert threading types exist in every build); it is only ever minted by L0Manager::pin_snapshot, which a transaction calls only when UniConfig::ssi_enabled is true.

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impl Debug for PinToken

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

Formats the value using the given formatter. Read more

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