anshap1719 / multicache

An LRU cache where each object has a given weight

multicache

A cache that will keep track of the total size of the elements put in and evict based on that value. The cache is fully thread safe and returns Arc references.

Usage

extern crate multicache;
use multicache::MultiCache;
use std::sync::Arc;

fn main() {
  let cache = MultiCache::new(200);

  cache.put(0, 0, 100);
  cache.put(1, 1, 100);
  cache.put(2, 2, 100);

  assert_eq!(cache.get(0), None);
  assert_eq!(cache.get(1), Some(Arc::new(1)));
  assert_eq!(cache.get(2), Some(Arc::new(2)));
}

Doing a get bumps the value to be the last to be evicted:

extern crate multicache;
use multicache::MultiCache;
use std::sync::Arc;

fn main() {
  let cache = MultiCache::new(200);

  cache.put(0, 0, 100);
  cache.put(1, 1, 100);
  cache.get(0);
  cache.put(2, 2, 100);

  assert_eq!(cache.get(0), Some(Arc::new(0)));
  assert_eq!(cache.get(1), None);
  assert_eq!(cache.get(2), Some(Arc::new(2)));
}

Contributing

Bug reports and pull requests welcome at https://github.com/pedrocr/multicache

Meet us at #chimper on irc.libera.chat if you need to discuss a feature or issue in detail or even just for general chat. To just start chatting go to https://web.libera.chat/#chimper