dashmap 6.1.0

Blazing fast concurrent HashMap for Rust.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134

//! Central map trait to ease modifications and extensions down the road.

use crate::iter::{Iter, IterMut};
use crate::lock::{RwLockReadGuard, RwLockWriteGuard};
use crate::mapref::entry::Entry;
use crate::mapref::one::{Ref, RefMut};
use crate::try_result::TryResult;
use crate::HashMap;
use core::borrow::Borrow;
use core::hash::{BuildHasher, Hash};

/// Implementation detail that is exposed due to generic constraints in public types.
pub trait Map<'a, K: 'a + Eq + Hash, V: 'a, S: 'a + Clone + BuildHasher> {
    fn _shard_count(&self) -> usize;

    /// # Safety
    ///
    /// The index must not be out of bounds.
    unsafe fn _get_read_shard(&'a self, i: usize) -> &'a HashMap<K, V>;

    /// # Safety
    ///
    /// The index must not be out of bounds.
    unsafe fn _yield_read_shard(&'a self, i: usize) -> RwLockReadGuard<'a, HashMap<K, V>>;

    /// # Safety
    ///
    /// The index must not be out of bounds.
    unsafe fn _yield_write_shard(&'a self, i: usize) -> RwLockWriteGuard<'a, HashMap<K, V>>;

    /// # Safety
    ///
    /// The index must not be out of bounds.
    unsafe fn _try_yield_read_shard(
        &'a self,
        i: usize,
    ) -> Option<RwLockReadGuard<'a, HashMap<K, V>>>;

    /// # Safety
    ///
    /// The index must not be out of bounds.
    unsafe fn _try_yield_write_shard(
        &'a self,
        i: usize,
    ) -> Option<RwLockWriteGuard<'a, HashMap<K, V>>>;

    fn _insert(&self, key: K, value: V) -> Option<V>;

    fn _remove<Q>(&self, key: &Q) -> Option<(K, V)>
    where
        K: Borrow<Q>,
        Q: Hash + Eq + ?Sized;

    fn _remove_if<Q>(&self, key: &Q, f: impl FnOnce(&K, &V) -> bool) -> Option<(K, V)>
    where
        K: Borrow<Q>,
        Q: Hash + Eq + ?Sized;

    fn _remove_if_mut<Q>(&self, key: &Q, f: impl FnOnce(&K, &mut V) -> bool) -> Option<(K, V)>
    where
        K: Borrow<Q>,
        Q: Hash + Eq + ?Sized;

    fn _iter(&'a self) -> Iter<'a, K, V, S, Self>
    where
        Self: Sized;

    fn _iter_mut(&'a self) -> IterMut<'a, K, V, S, Self>
    where
        Self: Sized;

    fn _get<Q>(&'a self, key: &Q) -> Option<Ref<'a, K, V>>
    where
        K: Borrow<Q>,
        Q: Hash + Eq + ?Sized;

    fn _get_mut<Q>(&'a self, key: &Q) -> Option<RefMut<'a, K, V>>
    where
        K: Borrow<Q>,
        Q: Hash + Eq + ?Sized;

    fn _try_get<Q>(&'a self, key: &Q) -> TryResult<Ref<'a, K, V>>
    where
        K: Borrow<Q>,
        Q: Hash + Eq + ?Sized;

    fn _try_get_mut<Q>(&'a self, key: &Q) -> TryResult<RefMut<'a, K, V>>
    where
        K: Borrow<Q>,
        Q: Hash + Eq + ?Sized;

    fn _shrink_to_fit(&self);

    fn _retain(&self, f: impl FnMut(&K, &mut V) -> bool);

    fn _len(&self) -> usize;

    fn _capacity(&self) -> usize;

    fn _alter<Q>(&self, key: &Q, f: impl FnOnce(&K, V) -> V)
    where
        K: Borrow<Q>,
        Q: Hash + Eq + ?Sized;

    fn _alter_all(&self, f: impl FnMut(&K, V) -> V);

    fn _view<Q, R>(&self, key: &Q, f: impl FnOnce(&K, &V) -> R) -> Option<R>
    where
        K: Borrow<Q>,
        Q: Hash + Eq + ?Sized;

    fn _entry(&'a self, key: K) -> Entry<'a, K, V>;

    fn _try_entry(&'a self, key: K) -> Option<Entry<'a, K, V>>;

    fn _hasher(&self) -> S;

    // provided
    fn _clear(&self) {
        self._retain(|_, _| false)
    }

    fn _contains_key<Q>(&'a self, key: &Q) -> bool
    where
        K: Borrow<Q>,
        Q: Hash + Eq + ?Sized,
    {
        self._get(key).is_some()
    }

    fn _is_empty(&self) -> bool {
        self._len() == 0
    }
}