diff options
Diffstat (limited to 'vendor/github.com/hashicorp/golang-lru')
| -rw-r--r-- | vendor/github.com/hashicorp/golang-lru/lru.go | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/vendor/github.com/hashicorp/golang-lru/lru.go b/vendor/github.com/hashicorp/golang-lru/lru.go index 052a38b4..4e5e9d8f 100644 --- a/vendor/github.com/hashicorp/golang-lru/lru.go +++ b/vendor/github.com/hashicorp/golang-lru/lru.go @@ -37,7 +37,7 @@ func (c *Cache) Purge() { c.lock.Unlock() } -// Add adds a value to the cache. Returns true if an eviction occurred. +// Add adds a value to the cache. Returns true if an eviction occurred. func (c *Cache) Add(key, value interface{}) (evicted bool) { c.lock.Lock() evicted = c.lru.Add(key, value) @@ -71,8 +71,8 @@ func (c *Cache) Peek(key interface{}) (value interface{}, ok bool) { return value, ok } -// ContainsOrAdd checks if a key is in the cache without updating the -// recent-ness or deleting it for being stale, and if not, adds the value. +// ContainsOrAdd checks if a key is in the cache without updating the +// recent-ness or deleting it for being stale, and if not, adds the value. // Returns whether found and whether an eviction occurred. func (c *Cache) ContainsOrAdd(key, value interface{}) (ok, evicted bool) { c.lock.Lock() @@ -85,6 +85,22 @@ func (c *Cache) ContainsOrAdd(key, value interface{}) (ok, evicted bool) { return false, evicted } +// PeekOrAdd checks if a key is in the cache without updating the +// recent-ness or deleting it for being stale, and if not, adds the value. +// Returns whether found and whether an eviction occurred. +func (c *Cache) PeekOrAdd(key, value interface{}) (previous interface{}, ok, evicted bool) { + c.lock.Lock() + defer c.lock.Unlock() + + previous, ok = c.lru.Peek(key) + if ok { + return previous, true, false + } + + evicted = c.lru.Add(key, value) + return nil, false, evicted +} + // Remove removes the provided key from the cache. func (c *Cache) Remove(key interface{}) (present bool) { c.lock.Lock() |