Method extend

block/src/qcow/vec_cache.rs:71–79

Extends the cache capacity to `new_len` elements. No-op if `new_len <= self.len()`. Allocates a new buffer, copies existing data, and fills new elements with default values. Marks the cache as dirty.

(&mut self, new_len: usize)

    /// existing data, and fills new elements with default values.
    /// Marks the cache as dirty.
    pub fn extend(&mut self, new_len: usize) {
        if new_len <= self.vec.len() {
            return;
        }
        let mut new_vec = vec![Default::default(); new_len];
        new_vec[..self.vec.len()].copy_from_slice(&self.vec);
        self.vec = new_vec.into_boxed_slice();
        self.dirty = true;
    }
}

impl<T: 'static + Copy + Default> Cacheable for VecCache<T> {