diff options
Diffstat (limited to 'usagepool.go')
| -rw-r--r-- | usagepool.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/usagepool.go b/usagepool.go index 923402183..c34441554 100644 --- a/usagepool.go +++ b/usagepool.go @@ -194,6 +194,21 @@ func (up *UsagePool) Delete(key any) (deleted bool, err error) { return } +// References returns the number of references (count of usages) to a +// key in the pool, and true if the key exists, or false otherwise. +func (up *UsagePool) References(key interface{}) (int, bool) { + up.RLock() + upv, loaded := up.pool[key] + up.RUnlock() + if loaded { + // I wonder if it'd be safer to read this value during + // our lock on the UsagePool... guess we'll see... + refs := atomic.LoadInt32(&upv.refs) + return int(refs), true + } + return 0, false +} + // Constructor is a function that returns a new value // that can destruct itself when it is no longer needed. type Constructor func() (Destructor, error) |