Method Add

internal/bloblru/cache.go:49–78

Add adds key id with value blob to c. It may return an evicted buffer for reuse.

(id restic.ID, blob []byte)

// Add adds key id with value blob to c.
// It may return an evicted buffer for reuse.
func (c *Cache) Add(id restic.ID, blob []byte) (old []byte) {
	debug.Log("bloblru.Cache: add %v", id)

	size := cap(blob) + overhead
	if size > c.size {
		return
	}

	c.mu.Lock()
	defer c.mu.Unlock()

	if c.c.Contains(id) { // Doesn't update the recency list.
		return
	}

	// This loop takes at most min(maxEntries, maxchunksize/overhead)
	// iterations.
	for size > c.free {
		_, b, _ := c.c.RemoveOldest()
		if cap(b) > cap(old) {
			// We can only return one buffer, so pick the largest.
			old = b
		}
	}

	c.c.Add(id, blob)
	c.free -= size

	return old
}

func (c *Cache) Get(id restic.ID) ([]byte, bool) {
	c.mu.Lock()