[sync] Update to DashMap 6

(cherry picked from commit f854629)

Cargo.toml

@@ -31,7 +31,7 @@ tagptr = "0.2"
 triomphe = { version = ">=0.1.3, <0.1.12", default-features = false }
 
 # Optional dependencies (enabled by default)
-dashmap = { version = "5.2", optional = true }
+dashmap = { version = "6.1", optional = true }
 
 [dev-dependencies]
 anyhow = "1.0.19"

src/sync/base_cache.rs

@@ -450,7 +450,7 @@ enum AdmissionResult<K> {
 
 type CacheStore<K, V, S> = dashmap::DashMap<Arc<K>, TrioArc<ValueEntry<K, V>>, S>;
 
-type CacheEntryRef<'a, K, V, S> = DashMapRef<'a, Arc<K>, TrioArc<ValueEntry<K, V>>, S>;
+type CacheEntryRef<'a, K, V> = DashMapRef<'a, Arc<K>, TrioArc<ValueEntry<K, V>>>;
 
 pub(crate) struct Inner<K, V, S> {
     max_capacity: Option<u64>,
@@ -529,7 +529,7 @@ where
     }
 
     #[inline]
-    fn get<Q>(&self, key: &Q) -> Option<CacheEntryRef<'_, K, V, S>>
+    fn get<Q>(&self, key: &Q) -> Option<CacheEntryRef<'_, K, V>>
     where
         Arc<K>: Borrow<Q>,
         Q: Hash + Eq + ?Sized,

src/sync/cache.rs

@@ -554,7 +554,7 @@ where
     V: 'a,
     S: BuildHasher + Clone,
 {
-    type Item = EntryRef<'a, K, V, S>;
+    type Item = EntryRef<'a, K, V>;
 
     type IntoIter = Iter<'a, K, V, S>;
 

src/sync/iter.rs

@@ -26,7 +26,7 @@ where
     K: Eq + Hash,
     S: BuildHasher + Clone,
 {
-    type Item = EntryRef<'a, K, V, S>;
+    type Item = EntryRef<'a, K, V>;
 
     fn next(&mut self) -> Option<Self::Item> {
         for map_ref in &mut self.map_iter {

src/sync/mapref.rs

@@ -1,30 +1,25 @@
 use crate::common::concurrent::ValueEntry;
 
-use std::{
-    hash::{BuildHasher, Hash},
-    sync::Arc,
-};
+use std::{hash::Hash, sync::Arc};
 use triomphe::Arc as TrioArc;
 
-type DashMapRef<'a, K, V, S> =
-    dashmap::mapref::multiple::RefMulti<'a, Arc<K>, TrioArc<ValueEntry<K, V>>, S>;
+type DashMapRef<'a, K, V> =
+    dashmap::mapref::multiple::RefMulti<'a, Arc<K>, TrioArc<ValueEntry<K, V>>>;
 
-pub struct EntryRef<'a, K, V, S>(DashMapRef<'a, K, V, S>);
+pub struct EntryRef<'a, K, V>(DashMapRef<'a, K, V>);
 
-unsafe impl<'a, K, V, S> Sync for EntryRef<'a, K, V, S>
+unsafe impl<'a, K, V> Sync for EntryRef<'a, K, V>
 where
     K: Eq + Hash + Send + Sync,
     V: Send + Sync,
-    S: BuildHasher,
 {
 }
 
-impl<'a, K, V, S> EntryRef<'a, K, V, S>
+impl<'a, K, V> EntryRef<'a, K, V>
 where
     K: Eq + Hash,
-    S: BuildHasher + Clone,
 {
-    pub(crate) fn new(map_ref: DashMapRef<'a, K, V, S>) -> Self {
+    pub(crate) fn new(map_ref: DashMapRef<'a, K, V>) -> Self {
         Self(map_ref)
     }
 
@@ -41,10 +36,9 @@ where
     }
 }
 
-impl<'a, K, V, S> std::ops::Deref for EntryRef<'a, K, V, S>
+impl<'a, K, V> std::ops::Deref for EntryRef<'a, K, V>
 where
     K: Eq + Hash,
-    S: BuildHasher + Clone,
 {
     type Target = V;