atomic-traits

Rust 中泛型原子操作的特性。

兼容性

该包已针对稳定和夜间编译器进行了测试。

当前最低支持版本 (MSRV) 为 1.34.0。

用法

将此添加到您的 Cargo.toml

[dependencies]
atomic-traits = "0.4"

并将此添加到您的 crate 根目录

extern crate atomic_traits;

示例

extern crate num_traits;
extern crate atomic_traits;

use std::sync::atomic::{AtomicUsize, Ordering};

use num_traits::One;
use atomic_traits::{Atomic, NumOps, fetch};

#[derive(Debug, Default)]
pub struct RefCnt<T>(T);

impl<T> RefCnt<T>
where
    T: Atomic + NumOps + Default,
    <T as Atomic>::Type: One
{
    pub fn inc(&self) -> <T as Atomic>::Type {
        self.0.fetch_add(<T as Atomic>::Type::one(), Ordering::Acquire)
    }

    pub fn dec(&self) -> <T as Atomic>::Type {
        self.0.fetch_sub(<T as Atomic>::Type::one(), Ordering::Release)
    }

    pub fn val(&self) -> <T as Atomic>::Type {
        self.0.load(Ordering::SeqCst)
    }
}

let refcnt = RefCnt::<AtomicUsize>::default();

assert_eq!(refcnt.inc(), 0);
assert_eq!(refcnt.dec(), 1);
assert_eq!(refcnt.val(), 0);