traitgraph_algo::dijkstra::epoch_array_dijkstra_node_weight_array

Struct EpochArray

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pub struct EpochArray { /* private fields */ }
Expand description

An epoch counter array.

This can be used to check if an index is current by comparing its entry in the epoch array to the current epoch. To unmark all values, the current epoch can be increased in O(1). Only overflows have to be handled by resetting all epoch counters.

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impl EpochArray

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pub fn new(len: usize) -> Self

Create a new epoch array of given length where all values are outdated.

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pub fn clear(&mut self)

Outdate all indices.

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pub fn update(&mut self, index: usize) -> bool

Set the given index as current and returns true if the given index was current before, and false otherwise

Safety: Undefined behaviour if the index is out of bounds of the epoch array.

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pub fn get(&self, index: usize) -> bool

Returns true if the given index is current, and false otherwise.

Safety: Undefined behaviour if the index is out of bounds of the epoch array.

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pub fn get_and_update(&mut self, index: usize) -> bool

Updates the given index and returns true if the given index was current before, and false otherwise.

Safety: Undefined behaviour if the index is out of bounds of the epoch array.

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