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use crate::HashMap;
use parking_lot::{RwLockReadGuard, RwLockWriteGuard};
use std::hash::Hash;
use std::ops::{Deref, DerefMut};
pub struct Ref<'a, K: Eq + Hash, V> {
_guard: RwLockReadGuard<'a, HashMap<K, V>>,
k: &'a K,
v: &'a V,
}
unsafe impl<'a, K: Eq + Hash + Send, V: Send> Send for Ref<'a, K, V> {}
unsafe impl<'a, K: Eq + Hash + Send + Sync, V: Send + Sync> Sync for Ref<'a, K, V> {}
impl<'a, K: Eq + Hash, V> Ref<'a, K, V> {
#[inline(always)]
pub(crate) fn new(guard: RwLockReadGuard<'a, HashMap<K, V>>, k: &'a K, v: &'a V) -> Self {
Self {
_guard: guard,
k,
v,
}
}
#[inline(always)]
pub fn key(&self) -> &K {
self.k
}
#[inline(always)]
pub fn value(&self) -> &V {
self.v
}
#[inline(always)]
pub fn pair(&self) -> (&K, &V) {
(self.k, self.v)
}
}
impl<'a, K: Eq + Hash, V> Deref for Ref<'a, K, V> {
type Target = V;
#[inline(always)]
fn deref(&self) -> &V {
self.value()
}
}
pub struct RefMut<'a, K: Eq + Hash, V> {
_guard: RwLockWriteGuard<'a, HashMap<K, V>>,
k: &'a K,
v: &'a mut V,
}
unsafe impl<'a, K: Eq + Hash + Send, V: Send> Send for RefMut<'a, K, V> {}
unsafe impl<'a, K: Eq + Hash + Send + Sync, V: Send + Sync> Sync for RefMut<'a, K, V> {}
impl<'a, K: Eq + Hash, V> RefMut<'a, K, V> {
#[inline(always)]
pub(crate) fn new(guard: RwLockWriteGuard<'a, HashMap<K, V>>, k: &'a K, v: &'a mut V) -> Self {
Self {
_guard: guard,
k,
v,
}
}
#[inline(always)]
pub fn key(&self) -> &K {
self.k
}
#[inline(always)]
pub fn value(&self) -> &V {
self.v
}
#[inline(always)]
pub fn value_mut(&mut self) -> &mut V {
self.v
}
#[inline(always)]
pub fn pair(&self) -> (&K, &V) {
(self.k, self.v)
}
#[inline(always)]
pub fn pair_mut(&mut self) -> (&K, &mut V) {
(self.k, self.v)
}
}
impl<'a, K: Eq + Hash, V> Deref for RefMut<'a, K, V> {
type Target = V;
#[inline(always)]
fn deref(&self) -> &V {
self.value()
}
}
impl<'a, K: Eq + Hash, V> DerefMut for RefMut<'a, K, V> {
#[inline(always)]
fn deref_mut(&mut self) -> &mut V {
self.value_mut()
}
}