pub(crate) use implementation::AtomicU64;
#[cfg(target_pointer_width = "64")]
mod implementation {
use std::sync::atomic;
pub(crate) struct AtomicU64(atomic::AtomicU64);
impl AtomicU64 {
pub(crate) const fn new(initial: u64) -> Self {
Self(atomic::AtomicU64::new(initial))
}
pub(crate) fn fetch_add(&self, v: u64) -> u64 {
self.0.fetch_add(v, atomic::Ordering::Relaxed)
}
}
}
#[cfg(not(target_pointer_width = "64"))]
mod implementation {
use parking_lot::{const_mutex, Mutex};
pub(crate) struct AtomicU64(Mutex<u64>);
impl AtomicU64 {
pub(crate) const fn new(initial: u64) -> Self {
Self(const_mutex(initial))
}
pub(crate) fn fetch_add(&self, v: u64) -> u64 {
let mut lock = self.0.lock();
let i = *lock;
*lock = i + v;
i
}
}
}