[−][src]Crate raii_counter_futures
raii-counter
Rust type for a RAII Counter (counts number of held instances,
decrements count on Drop
), implemented with Arc<AtomicUsize>
.
Useful for tracking the number of holders exist for a handle, tracking the number of transactions that are in-flight, etc.
Demo
use raii_counter_futures::Counter; let counter = Counter::new(); assert_eq!(counter.count(), 1); let weak = counter.downgrade(); assert_eq!(weak.count(), 0); { let _counter1 = weak.spawn_upgrade(); assert_eq!(weak.count(), 1); let _counter2 = weak.spawn_upgrade(); assert_eq!(weak.count(), 2); } assert_eq!(weak.count(), 0);
Structs
Counter | Essentially an AtomicUsize that is clonable and whose count is based on the number of copies. The count is automatically updated on Drop. |
WeakCounter | A 'weak' Counter that does not affect the count. |