7 releases
0.5.4 | Mar 26, 2024 |
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0.5.2 | Jun 4, 2023 |
0.5.0 | May 27, 2023 |
0.4.2 | May 5, 2023 |
0.3.1 | May 3, 2023 |
#295 in Data structures
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Used in 2 crates
63KB
2K
SLoC
compact-rc
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 type 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));
}