txmap 3.0.1

A concurrent transactional hash map for Rust with fine-grained locking, internal mutability and composable transactions
Documentation 
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use std::ops::{Deref, DerefMut};

pub trait LockPolicy {
    type Lock<T>;

    type ReadGuard<'lock, T>: Deref<Target = T>
    where
        Self: 'lock,
        T: 'lock;

    type WriteGuard<'lock, T>: DerefMut<Target = T>
    where
        Self: 'lock,
        T: 'lock;

    fn new<T>(value: T) -> Self::Lock<T>;
    fn read<'lock, T>(lock: &'lock Self::Lock<T>) -> Self::ReadGuard<'lock, T>;
    fn write<'lock, T>(lock: &'lock Self::Lock<T>) -> Self::WriteGuard<'lock, T>;
}