ritecache 0.1.0

RiteCache. A smart cache that knows your data.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

use std::borrow::Borrow;

use heapsize_::HeapSizeOf;

use super::Meter;

/// Size limit based on the heap size of each cache item.
///
/// Requires cache entries that implement [`HeapSizeOf`][1].
///
/// [1]: https://doc.servo.org/heapsize/trait.HeapSizeOf.html
pub struct HeapSize;

impl<K, V: HeapSizeOf> Meter<K, V> for HeapSize {
    type Measure = usize;

    fn measure<Q: ?Sized>(&self, _: &Q, item: &V) -> usize
    where
        K: Borrow<Q>,
    {
        item.heap_size_of_children() + ::std::mem::size_of::<V>()
    }
}