mirror of https://github.com/xacrimon/dashmap
115 lines
2.4 KiB
Rust
115 lines
2.4 KiB
Rust
use crate::lock::{RwLockReadGuard, RwLockWriteGuard};
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use crate::HashMap;
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use core::hash::{BuildHasher, Hash};
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use core::ops::{Deref, DerefMut};
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use std::collections::hash_map::RandomState;
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// -- Shared
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pub struct Ref<'a, K, V, S = RandomState> {
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_guard: RwLockReadGuard<'a, HashMap<K, V, S>>,
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k: &'a K,
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v: &'a V,
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}
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unsafe impl<'a, K: Eq + Hash + Send, V: Send, S: BuildHasher> Send for Ref<'a, K, V, S> {}
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unsafe impl<'a, K: Eq + Hash + Send + Sync, V: Send + Sync, S: BuildHasher> Sync
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for Ref<'a, K, V, S>
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{
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}
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impl<'a, K: Eq + Hash, V, S: BuildHasher> Ref<'a, K, V, S> {
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pub(crate) fn new(guard: RwLockReadGuard<'a, HashMap<K, V, S>>, k: &'a K, v: &'a V) -> Self {
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Self {
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_guard: guard,
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k,
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v,
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}
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}
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pub fn key(&self) -> &K {
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self.k
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}
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pub fn value(&self) -> &V {
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self.v
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}
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pub fn pair(&self) -> (&K, &V) {
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(self.k, self.v)
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}
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}
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impl<'a, K: Eq + Hash, V, S: BuildHasher> Deref for Ref<'a, K, V, S> {
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type Target = V;
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fn deref(&self) -> &V {
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self.value()
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}
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}
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// --
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// -- Unique
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pub struct RefMut<'a, K, V, S = RandomState> {
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guard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
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k: &'a K,
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v: &'a mut V,
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}
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unsafe impl<'a, K: Eq + Hash + Send, V: Send, S: BuildHasher> Send for RefMut<'a, K, V, S> {}
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unsafe impl<'a, K: Eq + Hash + Send + Sync, V: Send + Sync, S: BuildHasher> Sync
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for RefMut<'a, K, V, S>
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{
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}
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impl<'a, K: Eq + Hash, V, S: BuildHasher> RefMut<'a, K, V, S> {
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pub(crate) fn new(
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guard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
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k: &'a K,
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v: &'a mut V,
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) -> Self {
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Self { guard, k, v }
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}
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pub fn key(&self) -> &K {
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self.k
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}
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pub fn value(&self) -> &V {
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self.v
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}
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pub fn value_mut(&mut self) -> &mut V {
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self.v
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}
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pub fn pair(&self) -> (&K, &V) {
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(self.k, self.v)
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}
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pub fn pair_mut(&mut self) -> (&K, &mut V) {
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(self.k, self.v)
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}
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pub fn downgrade(self) -> Ref<'a, K, V, S> {
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Ref::new(self.guard.downgrade(), self.k, self.v)
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}
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}
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impl<'a, K: Eq + Hash, V, S: BuildHasher> Deref for RefMut<'a, K, V, S> {
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type Target = V;
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fn deref(&self) -> &V {
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self.value()
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}
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}
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impl<'a, K: Eq + Hash, V, S: BuildHasher> DerefMut for RefMut<'a, K, V, S> {
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fn deref_mut(&mut self) -> &mut V {
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self.value_mut()
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}
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}
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// --
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