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use super::Atomic;
use std::sync::atomic::Ordering;
macro_rules! atomic_int {
($name: ident, $atomic_type: ty) => {
/// Mock implementation of `std::sync::atomic::$name`.
#[derive(Debug, Default)]
pub struct $name(Atomic<$atomic_type>);
impl $name {
/// Creates a new instance of `$name`.
pub fn new(v: $atomic_type) -> Self {
Self(Atomic::new(v))
}
/// Returns a mutable reference to the underlying integer.
///
/// # Panics
///
/// This function panics if the access is invalid under the Rust memory
/// model.
pub fn get_mut(&mut self) -> &mut $atomic_type {
self.0.get_mut()
}
/// Load the value without any synchronization.
pub unsafe fn unsync_load(&self) -> $atomic_type {
self.0.unsync_load()
}
/// Loads a value from the atomic integer.
pub fn load(&self, order: Ordering) -> $atomic_type {
self.0.load(order)
}
/// Stores a value into the atomic integer.
pub fn store(&self, val: $atomic_type, order: Ordering) {
self.0.store(val, order)
}
/// Stores a value into the atomic integer, returning the previous value.
pub fn swap(&self, val: $atomic_type, order: Ordering) -> $atomic_type {
self.0.swap(val, order)
}
/// Stores a value into the atomic integer if the current value is the same as the `current` value.
pub fn compare_and_swap(
&self,
current: $atomic_type,
new: $atomic_type,
order: Ordering,
) -> $atomic_type {
self.0.compare_and_swap(current, new, order)
}
/// Stores a value into the atomic if the current value is the same as the `current` value.
pub fn compare_exchange(
&self,
current: $atomic_type,
new: $atomic_type,
success: Ordering,
failure: Ordering,
) -> Result<$atomic_type, $atomic_type> {
self.0.compare_exchange(current, new, success, failure)
}
/// Stores a value into the atomic if the current value is the same as the current value.
pub fn compare_exchange_weak(
&self,
current: $atomic_type,
new: $atomic_type,
success: Ordering,
failure: Ordering,
) -> Result<$atomic_type, $atomic_type> {
self.compare_exchange(current, new, success, failure)
}
/// Adds to the current value, returning the previous value.
pub fn fetch_add(&self, val: $atomic_type, order: Ordering) -> $atomic_type {
self.0.rmw(|v| v.wrapping_add(val), order)
}
/// Subtracts from the current value, returning the previous value.
pub fn fetch_sub(&self, val: $atomic_type, order: Ordering) -> $atomic_type {
self.0.rmw(|v| v.wrapping_sub(val), order)
}
/// Bitwise "and" with the current value.
pub fn fetch_and(&self, val: $atomic_type, order: Ordering) -> $atomic_type {
self.0.rmw(|v| v & val, order)
}
/// Bitwise "or" with the current value.
pub fn fetch_or(&self, val: $atomic_type, order: Ordering) -> $atomic_type {
self.0.rmw(|v| v | val, order)
}
/// Bitwise "xor" with the current value.
pub fn fetch_xor(&self, val: $atomic_type, order: Ordering) -> $atomic_type {
self.0.rmw(|v| v ^ val, order)
}
}
};
}
atomic_int!(AtomicU8, u8);
atomic_int!(AtomicU16, u16);
atomic_int!(AtomicU32, u32);
atomic_int!(AtomicU64, u64);
atomic_int!(AtomicUsize, usize);