dscale 0.5.1

A fast & deterministic simulation framework for benchmarking and testing distributed systems
Documentation 
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use crate::Rank;

#[derive(Clone, Copy, PartialEq, Eq)]
pub(crate) enum LinkState {
    Broken,
    Alive,
}

pub(crate) struct FaultState {
    link_matrix: Vec<Vec<LinkState>>,
}

impl FaultState {
    pub(crate) fn new(size: usize) -> Self {
        Self {
            link_matrix: vec![vec![LinkState::Alive; size]; size],
        }
    }

    pub(crate) fn break_link(&mut self, rank1: Rank, rank2: Rank) {
        self.sym_change_state(rank1, rank2, LinkState::Broken);
    }

    pub(crate) fn isolate(&mut self, rank: Rank) {
        for other in 0..self.link_matrix.len() {
            self.break_link(rank, other);
        }
    }

    pub(crate) fn restore(&mut self, rank: Rank) {
        for other in 0..self.link_matrix.len() {
            self.restore_link(rank, other);
        }
    }

    pub(crate) fn restore_link(&mut self, rank1: Rank, rank2: Rank) {
        self.sym_change_state(rank1, rank2, LinkState::Alive);
    }

    pub(crate) fn is_link_broken(&self, rank1: Rank, rank2: Rank) -> bool {
        self.link_matrix[rank1][rank2] == LinkState::Broken
    }

    fn sym_change_state(&mut self, rank1: Rank, rank2: Rank, state: LinkState) {
        self.link_matrix[rank1][rank2] = state;
        self.link_matrix[rank2][rank1] = state;
    }
}