Expand description
Low-memory reference-counting pointers.
The types in this crate have almost the same methods as standard Rc and Arc. The differences from the standard types are as follows:
- Weak reference is not supported.
- Small integers can be used as refcount.
| Crate | Strong count | Weak count |
|---|---|---|
std | usize | usize |
compact-rc | u8, u16, u32, u64, usize | not supported |
§Example
use compact_rc::Rc8;
fn main() {
// rc1 is a pointer containing i8 value with u8 refcount.
let rc1: Rc8<i8> = Rc8::new(100);
assert_eq!(Rc8::strong_count(&rc1), 1);
assert_eq!(*rc1, 100);
// Increment the refcount.
// The value is shared by rc1 and rc2.
let rc2 = rc1.clone();
assert_eq!(Rc8::strong_count(&rc1), 2);
assert_eq!(Rc8::strong_count(&rc2), 2);
assert_eq!(*rc1, 100);
assert_eq!(*rc2, 100);
assert!(Rc8::ptr_eq(&rc1, &rc2));
}Re-exports§
pub use arc::Arc;pub use arc::Arc16;pub use arc::Arc32;pub use arc::Arc64;pub use arc::Arc8;pub use rc::Rc;pub use rc::Rc16;pub use rc::Rc32;pub use rc::Rc64;pub use rc::Rc8;