summaryrefslogtreecommitdiffstats
path: root/third_party/rust/dashmap/src/mapref
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/rust/dashmap/src/mapref')
-rw-r--r--third_party/rust/dashmap/src/mapref/entry.rs198
-rw-r--r--third_party/rust/dashmap/src/mapref/mod.rs3
-rw-r--r--third_party/rust/dashmap/src/mapref/multiple.rs120
-rw-r--r--third_party/rust/dashmap/src/mapref/one.rs114
4 files changed, 435 insertions, 0 deletions
diff --git a/third_party/rust/dashmap/src/mapref/entry.rs b/third_party/rust/dashmap/src/mapref/entry.rs
new file mode 100644
index 0000000000..7a609ee61a
--- /dev/null
+++ b/third_party/rust/dashmap/src/mapref/entry.rs
@@ -0,0 +1,198 @@
+use super::one::RefMut;
+use crate::lock::RwLockWriteGuard;
+use crate::util;
+use crate::util::SharedValue;
+use crate::HashMap;
+use core::hash::{BuildHasher, Hash};
+use core::mem;
+use core::ptr;
+use std::collections::hash_map::RandomState;
+
+pub enum Entry<'a, K, V, S = RandomState> {
+ Occupied(OccupiedEntry<'a, K, V, S>),
+ Vacant(VacantEntry<'a, K, V, S>),
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> Entry<'a, K, V, S> {
+ /// Apply a function to the stored value if it exists.
+ pub fn and_modify(self, f: impl FnOnce(&mut V)) -> Self {
+ match self {
+ Entry::Occupied(mut entry) => {
+ f(entry.get_mut());
+
+ Entry::Occupied(entry)
+ }
+
+ Entry::Vacant(entry) => Entry::Vacant(entry),
+ }
+ }
+
+ /// Get the key of the entry.
+ pub fn key(&self) -> &K {
+ match *self {
+ Entry::Occupied(ref entry) => entry.key(),
+ Entry::Vacant(ref entry) => entry.key(),
+ }
+ }
+
+ /// Into the key of the entry.
+ pub fn into_key(self) -> K {
+ match self {
+ Entry::Occupied(entry) => entry.into_key(),
+ Entry::Vacant(entry) => entry.into_key(),
+ }
+ }
+
+ /// Return a mutable reference to the element if it exists,
+ /// otherwise insert the default and return a mutable reference to that.
+ pub fn or_default(self) -> RefMut<'a, K, V, S>
+ where
+ V: Default,
+ {
+ match self {
+ Entry::Occupied(entry) => entry.into_ref(),
+ Entry::Vacant(entry) => entry.insert(V::default()),
+ }
+ }
+
+ /// Return a mutable reference to the element if it exists,
+ /// otherwise a provided value and return a mutable reference to that.
+ pub fn or_insert(self, value: V) -> RefMut<'a, K, V, S> {
+ match self {
+ Entry::Occupied(entry) => entry.into_ref(),
+ Entry::Vacant(entry) => entry.insert(value),
+ }
+ }
+
+ /// Return a mutable reference to the element if it exists,
+ /// otherwise insert the result of a provided function and return a mutable reference to that.
+ pub fn or_insert_with(self, value: impl FnOnce() -> V) -> RefMut<'a, K, V, S> {
+ match self {
+ Entry::Occupied(entry) => entry.into_ref(),
+ Entry::Vacant(entry) => entry.insert(value()),
+ }
+ }
+
+ pub fn or_try_insert_with<E>(
+ self,
+ value: impl FnOnce() -> Result<V, E>,
+ ) -> Result<RefMut<'a, K, V, S>, E> {
+ match self {
+ Entry::Occupied(entry) => Ok(entry.into_ref()),
+ Entry::Vacant(entry) => Ok(entry.insert(value()?)),
+ }
+ }
+}
+
+pub struct VacantEntry<'a, K, V, S> {
+ shard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+ key: K,
+}
+
+unsafe impl<'a, K: Eq + Hash + Send, V: Send, S: BuildHasher> Send for VacantEntry<'a, K, V, S> {}
+
+unsafe impl<'a, K: Eq + Hash + Send + Sync, V: Send + Sync, S: BuildHasher> Sync
+ for VacantEntry<'a, K, V, S>
+{
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> VacantEntry<'a, K, V, S> {
+ pub(crate) fn new(shard: RwLockWriteGuard<'a, HashMap<K, V, S>>, key: K) -> Self {
+ Self { shard, key }
+ }
+
+ pub fn insert(mut self, value: V) -> RefMut<'a, K, V, S> {
+ unsafe {
+ let c: K = ptr::read(&self.key);
+
+ self.shard.insert(self.key, SharedValue::new(value));
+
+ let (k, v) = self.shard.get_key_value(&c).unwrap();
+
+ let k = util::change_lifetime_const(k);
+
+ let v = &mut *v.as_ptr();
+
+ let r = RefMut::new(self.shard, k, v);
+
+ mem::forget(c);
+
+ r
+ }
+ }
+
+ pub fn into_key(self) -> K {
+ self.key
+ }
+
+ pub fn key(&self) -> &K {
+ &self.key
+ }
+}
+
+pub struct OccupiedEntry<'a, K, V, S> {
+ shard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+ elem: (&'a K, &'a mut V),
+ key: K,
+}
+
+unsafe impl<'a, K: Eq + Hash + Send, V: Send, S: BuildHasher> Send for OccupiedEntry<'a, K, V, S> {}
+
+unsafe impl<'a, K: Eq + Hash + Send + Sync, V: Send + Sync, S: BuildHasher> Sync
+ for OccupiedEntry<'a, K, V, S>
+{
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> OccupiedEntry<'a, K, V, S> {
+ pub(crate) fn new(
+ shard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+ key: K,
+ elem: (&'a K, &'a mut V),
+ ) -> Self {
+ Self { shard, elem, key }
+ }
+
+ pub fn get(&self) -> &V {
+ self.elem.1
+ }
+
+ pub fn get_mut(&mut self) -> &mut V {
+ self.elem.1
+ }
+
+ pub fn insert(&mut self, value: V) -> V {
+ mem::replace(self.elem.1, value)
+ }
+
+ pub fn into_ref(self) -> RefMut<'a, K, V, S> {
+ RefMut::new(self.shard, self.elem.0, self.elem.1)
+ }
+
+ pub fn into_key(self) -> K {
+ self.key
+ }
+
+ pub fn key(&self) -> &K {
+ self.elem.0
+ }
+
+ pub fn remove(mut self) -> V {
+ self.shard.remove(self.elem.0).unwrap().into_inner()
+ }
+
+ pub fn remove_entry(mut self) -> (K, V) {
+ let (k, v) = self.shard.remove_entry(self.elem.0).unwrap();
+
+ (k, v.into_inner())
+ }
+
+ pub fn replace_entry(mut self, value: V) -> (K, V) {
+ let nk = self.key;
+
+ let (k, v) = self.shard.remove_entry(self.elem.0).unwrap();
+
+ self.shard.insert(nk, SharedValue::new(value));
+
+ (k, v.into_inner())
+ }
+}
diff --git a/third_party/rust/dashmap/src/mapref/mod.rs b/third_party/rust/dashmap/src/mapref/mod.rs
new file mode 100644
index 0000000000..8897547e01
--- /dev/null
+++ b/third_party/rust/dashmap/src/mapref/mod.rs
@@ -0,0 +1,3 @@
+pub mod entry;
+pub mod multiple;
+pub mod one;
diff --git a/third_party/rust/dashmap/src/mapref/multiple.rs b/third_party/rust/dashmap/src/mapref/multiple.rs
new file mode 100644
index 0000000000..4d30aee46f
--- /dev/null
+++ b/third_party/rust/dashmap/src/mapref/multiple.rs
@@ -0,0 +1,120 @@
+use crate::lock::{RwLockReadGuard, RwLockWriteGuard};
+use crate::HashMap;
+use core::hash::BuildHasher;
+use core::hash::Hash;
+use core::ops::{Deref, DerefMut};
+use std::collections::hash_map::RandomState;
+use std::sync::Arc;
+
+// -- Shared
+pub struct RefMulti<'a, K, V, S = RandomState> {
+ _guard: Arc<RwLockReadGuard<'a, HashMap<K, V, S>>>,
+ k: &'a K,
+ v: &'a V,
+}
+
+unsafe impl<'a, K: Eq + Hash + Send, V: Send, S: BuildHasher> Send for RefMulti<'a, K, V, S> {}
+
+unsafe impl<'a, K: Eq + Hash + Send + Sync, V: Send + Sync, S: BuildHasher> Sync
+ for RefMulti<'a, K, V, S>
+{
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> RefMulti<'a, K, V, S> {
+ pub(crate) fn new(
+ guard: Arc<RwLockReadGuard<'a, HashMap<K, V, S>>>,
+ k: &'a K,
+ v: &'a V,
+ ) -> Self {
+ Self {
+ _guard: guard,
+ k,
+ v,
+ }
+ }
+
+ pub fn key(&self) -> &K {
+ self.k
+ }
+
+ pub fn value(&self) -> &V {
+ self.v
+ }
+
+ pub fn pair(&self) -> (&K, &V) {
+ (self.k, self.v)
+ }
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> Deref for RefMulti<'a, K, V, S> {
+ type Target = V;
+
+ fn deref(&self) -> &V {
+ self.value()
+ }
+}
+
+// --
+// -- Unique
+pub struct RefMutMulti<'a, K, V, S = RandomState> {
+ _guard: Arc<RwLockWriteGuard<'a, HashMap<K, V, S>>>,
+ k: &'a K,
+ v: &'a mut V,
+}
+
+unsafe impl<'a, K: Eq + Hash + Send, V: Send, S: BuildHasher> Send for RefMutMulti<'a, K, V, S> {}
+
+unsafe impl<'a, K: Eq + Hash + Send + Sync, V: Send + Sync, S: BuildHasher> Sync
+ for RefMutMulti<'a, K, V, S>
+{
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> RefMutMulti<'a, K, V, S> {
+ pub(crate) fn new(
+ guard: Arc<RwLockWriteGuard<'a, HashMap<K, V, S>>>,
+ k: &'a K,
+ v: &'a mut V,
+ ) -> Self {
+ Self {
+ _guard: guard,
+ k,
+ v,
+ }
+ }
+
+ pub fn key(&self) -> &K {
+ self.k
+ }
+
+ pub fn value(&self) -> &V {
+ self.v
+ }
+
+ pub fn value_mut(&mut self) -> &mut V {
+ self.v
+ }
+
+ pub fn pair(&self) -> (&K, &V) {
+ (self.k, self.v)
+ }
+
+ pub fn pair_mut(&mut self) -> (&K, &mut V) {
+ (self.k, self.v)
+ }
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> Deref for RefMutMulti<'a, K, V, S> {
+ type Target = V;
+
+ fn deref(&self) -> &V {
+ self.value()
+ }
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> DerefMut for RefMutMulti<'a, K, V, S> {
+ fn deref_mut(&mut self) -> &mut V {
+ self.value_mut()
+ }
+}
+
+// --
diff --git a/third_party/rust/dashmap/src/mapref/one.rs b/third_party/rust/dashmap/src/mapref/one.rs
new file mode 100644
index 0000000000..67c1706ef8
--- /dev/null
+++ b/third_party/rust/dashmap/src/mapref/one.rs
@@ -0,0 +1,114 @@
+use crate::lock::{RwLockReadGuard, RwLockWriteGuard};
+use crate::HashMap;
+use core::hash::{BuildHasher, Hash};
+use core::ops::{Deref, DerefMut};
+use std::collections::hash_map::RandomState;
+
+// -- Shared
+pub struct Ref<'a, K, V, S = RandomState> {
+ _guard: RwLockReadGuard<'a, HashMap<K, V, S>>,
+ k: &'a K,
+ v: &'a V,
+}
+
+unsafe impl<'a, K: Eq + Hash + Send, V: Send, S: BuildHasher> Send for Ref<'a, K, V, S> {}
+
+unsafe impl<'a, K: Eq + Hash + Send + Sync, V: Send + Sync, S: BuildHasher> Sync
+ for Ref<'a, K, V, S>
+{
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> Ref<'a, K, V, S> {
+ pub(crate) fn new(guard: RwLockReadGuard<'a, HashMap<K, V, S>>, k: &'a K, v: &'a V) -> Self {
+ Self {
+ _guard: guard,
+ k,
+ v,
+ }
+ }
+
+ pub fn key(&self) -> &K {
+ self.k
+ }
+
+ pub fn value(&self) -> &V {
+ self.v
+ }
+
+ pub fn pair(&self) -> (&K, &V) {
+ (self.k, self.v)
+ }
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> Deref for Ref<'a, K, V, S> {
+ type Target = V;
+
+ fn deref(&self) -> &V {
+ self.value()
+ }
+}
+
+// --
+// -- Unique
+pub struct RefMut<'a, K, V, S = RandomState> {
+ guard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+ k: &'a K,
+ v: &'a mut V,
+}
+
+unsafe impl<'a, K: Eq + Hash + Send, V: Send, S: BuildHasher> Send for RefMut<'a, K, V, S> {}
+
+unsafe impl<'a, K: Eq + Hash + Send + Sync, V: Send + Sync, S: BuildHasher> Sync
+ for RefMut<'a, K, V, S>
+{
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> RefMut<'a, K, V, S> {
+ pub(crate) fn new(
+ guard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+ k: &'a K,
+ v: &'a mut V,
+ ) -> Self {
+ Self { guard, k, v }
+ }
+
+ pub fn key(&self) -> &K {
+ self.k
+ }
+
+ pub fn value(&self) -> &V {
+ self.v
+ }
+
+ pub fn value_mut(&mut self) -> &mut V {
+ self.v
+ }
+
+ pub fn pair(&self) -> (&K, &V) {
+ (self.k, self.v)
+ }
+
+ pub fn pair_mut(&mut self) -> (&K, &mut V) {
+ (self.k, self.v)
+ }
+
+ pub fn downgrade(self) -> Ref<'a, K, V, S> {
+ Ref::new(self.guard.downgrade(), self.k, self.v)
+ }
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> Deref for RefMut<'a, K, V, S> {
+ type Target = V;
+
+ fn deref(&self) -> &V {
+ self.value()
+ }
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> DerefMut for RefMut<'a, K, V, S> {
+ fn deref_mut(&mut self) -> &mut V {
+ self.value_mut()
+ }
+}
+
+// --
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 15:23:12 +0000