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.