Crate raii_counter[−][src]
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
extern crate raii_counter; use raii_counter::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. |