Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 620 insertions, 0 deletions

diff --git a/vendor/dashmap/src/mapref/entry.rs b/vendor/dashmap/src/mapref/entry.rs
new file mode 100644
index 000000000..16a42ce77
--- /dev/null
+++ b/vendor/dashmap/src/mapref/entry.rs
@@ -0,0 +1,189 @@
+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 = RandomState> {
+    shard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+    key: K,
+}
+
+unsafe impl<'a, K: Eq + Hash + Sync, V: Sync, S: BuildHasher> Send for VacantEntry<'a, K, V, S> {}
+unsafe impl<'a, K: Eq + Hash + Sync, V: 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) unsafe 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 = RandomState> {
+    shard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+    elem: (*const K, *mut V),
+    key: K,
+}
+
+unsafe impl<'a, K: Eq + Hash + Sync, V: Sync, S: BuildHasher> Send for OccupiedEntry<'a, K, V, S> {}
+unsafe impl<'a, K: Eq + Hash + Sync, V: 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) unsafe fn new(
+        shard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+        key: K,
+        elem: (*const K, *mut V),
+    ) -> Self {
+        Self { shard, elem, key }
+    }
+
+    pub fn get(&self) -> &V {
+        unsafe { &*self.elem.1 }
+    }
+
+    pub fn get_mut(&mut self) -> &mut V {
+        unsafe { &mut *self.elem.1 }
+    }
+
+    pub fn insert(&mut self, value: V) -> V {
+        mem::replace(self.get_mut(), value)
+    }
+
+    pub fn into_ref(self) -> RefMut<'a, K, V, S> {
+        unsafe { RefMut::new(self.shard, self.elem.0, self.elem.1) }
+    }
+
+    pub fn into_key(self) -> K {
+        self.key
+    }
+
+    pub fn key(&self) -> &K {
+        unsafe { &*self.elem.0 }
+    }
+
+    pub fn remove(mut self) -> V {
+        let key = unsafe { &*self.elem.0 };
+        self.shard.remove(key).unwrap().into_inner()
+    }
+
+    pub fn remove_entry(mut self) -> (K, V) {
+        let key = unsafe { &*self.elem.0 };
+        let (k, v) = self.shard.remove_entry(key).unwrap();
+        (k, v.into_inner())
+    }
+
+    pub fn replace_entry(mut self, value: V) -> (K, V) {
+        let nk = self.key;
+        let key = unsafe { &*self.elem.0 };
+        let (k, v) = self.shard.remove_entry(key).unwrap();
+        self.shard.insert(nk, SharedValue::new(value));
+        (k, v.into_inner())
+    }
+}
diff --git a/vendor/dashmap/src/mapref/mod.rs b/vendor/dashmap/src/mapref/mod.rs
new file mode 100644
index 000000000..8897547e0
--- /dev/null
+++ b/vendor/dashmap/src/mapref/mod.rs
@@ -0,0 +1,3 @@
+pub mod entry;
+pub mod multiple;
+pub mod one;
diff --git a/vendor/dashmap/src/mapref/multiple.rs b/vendor/dashmap/src/mapref/multiple.rs
new file mode 100644
index 000000000..53a8a7e58
--- /dev/null
+++ b/vendor/dashmap/src/mapref/multiple.rs
@@ -0,0 +1,107 @@
+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;
+
+pub struct RefMulti<'a, K, V, S = RandomState> {
+    _guard: Arc<RwLockReadGuard<'a, HashMap<K, V, S>>>,
+    k: *const K,
+    v: *const V,
+}
+
+unsafe impl<'a, K: Eq + Hash + Sync, V: Sync, S: BuildHasher> Send for RefMulti<'a, K, V, S> {}
+unsafe impl<'a, K: Eq + Hash + Sync, V: 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) unsafe fn new(
+        guard: Arc<RwLockReadGuard<'a, HashMap<K, V, S>>>,
+        k: *const K,
+        v: *const V,
+    ) -> Self {
+        Self {
+            _guard: guard,
+            k,
+            v,
+        }
+    }
+
+    pub fn key(&self) -> &K {
+        self.pair().0
+    }
+
+    pub fn value(&self) -> &V {
+        self.pair().1
+    }
+
+    pub fn pair(&self) -> (&K, &V) {
+        unsafe { (&*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()
+    }
+}
+
+pub struct RefMutMulti<'a, K, V, S = RandomState> {
+    _guard: Arc<RwLockWriteGuard<'a, HashMap<K, V, S>>>,
+    k: *const K,
+    v: *mut V,
+}
+
+unsafe impl<'a, K: Eq + Hash + Sync, V: Sync, S: BuildHasher> Send for RefMutMulti<'a, K, V, S> {}
+unsafe impl<'a, K: Eq + Hash + Sync, V: 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) unsafe fn new(
+        guard: Arc<RwLockWriteGuard<'a, HashMap<K, V, S>>>,
+        k: *const K,
+        v: *mut V,
+    ) -> Self {
+        Self {
+            _guard: guard,
+            k,
+            v,
+        }
+    }
+
+    pub fn key(&self) -> &K {
+        self.pair().0
+    }
+
+    pub fn value(&self) -> &V {
+        self.pair().1
+    }
+
+    pub fn value_mut(&mut self) -> &mut V {
+        self.pair_mut().1
+    }
+
+    pub fn pair(&self) -> (&K, &V) {
+        unsafe { (&*self.k, &*self.v) }
+    }
+
+    pub fn pair_mut(&mut self) -> (&K, &mut V) {
+        unsafe { (&*self.k, &mut *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/vendor/dashmap/src/mapref/one.rs b/vendor/dashmap/src/mapref/one.rs
new file mode 100644
index 000000000..835e45cad
--- /dev/null
+++ b/vendor/dashmap/src/mapref/one.rs
@@ -0,0 +1,321 @@
+use crate::lock::{RwLockReadGuard, RwLockWriteGuard};
+use crate::HashMap;
+use core::hash::{BuildHasher, Hash};
+use core::ops::{Deref, DerefMut};
+use std::collections::hash_map::RandomState;
+use std::fmt::{Debug, Formatter};
+
+pub struct Ref<'a, K, V, S = RandomState> {
+    _guard: RwLockReadGuard<'a, HashMap<K, V, S>>,
+    k: *const K,
+    v: *const V,
+}
+
+unsafe impl<'a, K: Eq + Hash + Sync, V: Sync, S: BuildHasher> Send for Ref<'a, K, V, S> {}
+unsafe impl<'a, K: Eq + Hash + Sync, V: 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) unsafe fn new(
+        guard: RwLockReadGuard<'a, HashMap<K, V, S>>,
+        k: *const K,
+        v: *const V,
+    ) -> Self {
+        Self {
+            _guard: guard,
+            k,
+            v,
+        }
+    }
+
+    pub fn key(&self) -> &K {
+        self.pair().0
+    }
+
+    pub fn value(&self) -> &V {
+        self.pair().1
+    }
+
+    pub fn pair(&self) -> (&K, &V) {
+        unsafe { (&*self.k, &*self.v) }
+    }
+
+    pub fn map<F, T>(self, f: F) -> MappedRef<'a, K, V, T, S>
+    where
+        F: FnOnce(&V) -> &T,
+    {
+        MappedRef {
+            _guard: self._guard,
+            k: self.k,
+            v: f(unsafe { &*self.v }),
+        }
+    }
+
+    pub fn try_map<F, T>(self, f: F) -> Result<MappedRef<'a, K, V, T, S>, Self>
+    where
+        F: FnOnce(&V) -> Option<&T>,
+    {
+        if let Some(v) = f(unsafe { &*self.v }) {
+            Ok(MappedRef {
+                _guard: self._guard,
+                k: self.k,
+                v,
+            })
+        } else {
+            Err(self)
+        }
+    }
+}
+
+impl<'a, K: Eq + Hash + Debug, V: Debug, S: BuildHasher> Debug for Ref<'a, K, V, S> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("Ref")
+            .field("k", &self.k)
+            .field("v", &self.v)
+            .finish()
+    }
+}
+
+impl<'a, K: Eq + Hash, V, S: BuildHasher> Deref for Ref<'a, K, V, S> {
+    type Target = V;
+
+    fn deref(&self) -> &V {
+        self.value()
+    }
+}
+
+pub struct RefMut<'a, K, V, S = RandomState> {
+    guard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+    k: *const K,
+    v: *mut V,
+}
+
+unsafe impl<'a, K: Eq + Hash + Sync, V: Sync, S: BuildHasher> Send for RefMut<'a, K, V, S> {}
+unsafe impl<'a, K: Eq + Hash + Sync, V: 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) unsafe fn new(
+        guard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+        k: *const K,
+        v: *mut V,
+    ) -> Self {
+        Self { guard, k, v }
+    }
+
+    pub fn key(&self) -> &K {
+        self.pair().0
+    }
+
+    pub fn value(&self) -> &V {
+        self.pair().1
+    }
+
+    pub fn value_mut(&mut self) -> &mut V {
+        self.pair_mut().1
+    }
+
+    pub fn pair(&self) -> (&K, &V) {
+        unsafe { (&*self.k, &*self.v) }
+    }
+
+    pub fn pair_mut(&mut self) -> (&K, &mut V) {
+        unsafe { (&*self.k, &mut *self.v) }
+    }
+
+    pub fn downgrade(self) -> Ref<'a, K, V, S> {
+        unsafe { Ref::new(RwLockWriteGuard::downgrade(self.guard), self.k, self.v) }
+    }
+
+    pub fn map<F, T>(self, f: F) -> MappedRefMut<'a, K, V, T, S>
+    where
+        F: FnOnce(&mut V) -> &mut T,
+    {
+        MappedRefMut {
+            _guard: self.guard,
+            k: self.k,
+            v: f(unsafe { &mut *self.v }),
+        }
+    }
+
+    pub fn try_map<F, T>(self, f: F) -> Result<MappedRefMut<'a, K, V, T, S>, Self>
+    where
+        F: FnOnce(&mut V) -> Option<&mut T>,
+    {
+        let v = match f(unsafe { &mut *(self.v as *mut _) }) {
+            Some(v) => v,
+            None => return Err(self),
+        };
+        let guard = self.guard;
+        let k = self.k;
+        Ok(MappedRefMut {
+            _guard: guard,
+            k,
+            v,
+        })
+    }
+}
+
+impl<'a, K: Eq + Hash + Debug, V: Debug, S: BuildHasher> Debug for RefMut<'a, K, V, S> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("RefMut")
+            .field("k", &self.k)
+            .field("v", &self.v)
+            .finish()
+    }
+}
+
+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()
+    }
+}
+
+pub struct MappedRef<'a, K, V, T, S = RandomState> {
+    _guard: RwLockReadGuard<'a, HashMap<K, V, S>>,
+    k: *const K,
+    v: *const T,
+}
+
+impl<'a, K: Eq + Hash, V, T, S: BuildHasher> MappedRef<'a, K, V, T, S> {
+    pub fn key(&self) -> &K {
+        self.pair().0
+    }
+
+    pub fn value(&self) -> &T {
+        self.pair().1
+    }
+
+    pub fn pair(&self) -> (&K, &T) {
+        unsafe { (&*self.k, &*self.v) }
+    }
+
+    pub fn map<F, T2>(self, f: F) -> MappedRef<'a, K, V, T2, S>
+    where
+        F: FnOnce(&T) -> &T2,
+    {
+        MappedRef {
+            _guard: self._guard,
+            k: self.k,
+            v: f(unsafe { &*self.v }),
+        }
+    }
+
+    pub fn try_map<F, T2>(self, f: F) -> Result<MappedRef<'a, K, V, T2, S>, Self>
+    where
+        F: FnOnce(&T) -> Option<&T2>,
+    {
+        let v = match f(unsafe { &*self.v }) {
+            Some(v) => v,
+            None => return Err(self),
+        };
+        let guard = self._guard;
+        Ok(MappedRef {
+            _guard: guard,
+            k: self.k,
+            v,
+        })
+    }
+}
+
+impl<'a, K: Eq + Hash + Debug, V, T: Debug, S: BuildHasher> Debug for MappedRef<'a, K, V, T, S> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("MappedRef")
+            .field("k", &self.k)
+            .field("v", &self.v)
+            .finish()
+    }
+}
+
+impl<'a, K: Eq + Hash, V, T, S: BuildHasher> Deref for MappedRef<'a, K, V, T, S> {
+    type Target = T;
+
+    fn deref(&self) -> &T {
+        self.value()
+    }
+}
+
+pub struct MappedRefMut<'a, K, V, T, S = RandomState> {
+    _guard: RwLockWriteGuard<'a, HashMap<K, V, S>>,
+    k: *const K,
+    v: *mut T,
+}
+
+impl<'a, K: Eq + Hash, V, T, S: BuildHasher> MappedRefMut<'a, K, V, T, S> {
+    pub fn key(&self) -> &K {
+        self.pair().0
+    }
+
+    pub fn value(&self) -> &T {
+        self.pair().1
+    }
+
+    pub fn value_mut(&mut self) -> &mut T {
+        self.pair_mut().1
+    }
+
+    pub fn pair(&self) -> (&K, &T) {
+        unsafe { (&*self.k, &*self.v) }
+    }
+
+    pub fn pair_mut(&mut self) -> (&K, &mut T) {
+        unsafe { (&*self.k, &mut *self.v) }
+    }
+
+    pub fn map<F, T2>(self, f: F) -> MappedRefMut<'a, K, V, T2, S>
+    where
+        F: FnOnce(&mut T) -> &mut T2,
+    {
+        MappedRefMut {
+            _guard: self._guard,
+            k: self.k,
+            v: f(unsafe { &mut *self.v }),
+        }
+    }
+
+    pub fn try_map<F, T2>(self, f: F) -> Result<MappedRefMut<'a, K, V, T2, S>, Self>
+    where
+        F: FnOnce(&mut T) -> Option<&mut T2>,
+    {
+        let v = match f(unsafe { &mut *(self.v as *mut _) }) {
+            Some(v) => v,
+            None => return Err(self),
+        };
+        let guard = self._guard;
+        let k = self.k;
+        Ok(MappedRefMut {
+            _guard: guard,
+            k,
+            v,
+        })
+    }
+}
+
+impl<'a, K: Eq + Hash + Debug, V, T: Debug, S: BuildHasher> Debug for MappedRefMut<'a, K, V, T, S> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("MappedRefMut")
+            .field("k", &self.k)
+            .field("v", &self.v)
+            .finish()
+    }
+}
+
+impl<'a, K: Eq + Hash, V, T, S: BuildHasher> Deref for MappedRefMut<'a, K, V, T, S> {
+    type Target = T;
+
+    fn deref(&self) -> &T {
+        self.value()
+    }
+}
+
+impl<'a, K: Eq + Hash, V, T, S: BuildHasher> DerefMut for MappedRefMut<'a, K, V, T, S> {
+    fn deref_mut(&mut self) -> &mut T {
+        self.value_mut()
+    }
+}