hydra_dashmap/rayon/
set.rs

1use crate::setref::multiple::RefMulti;
2use crate::DashSet;
3use core::hash::{BuildHasher, Hash};
4use rayon::iter::plumbing::UnindexedConsumer;
5use rayon::iter::{FromParallelIterator, IntoParallelIterator, ParallelExtend, ParallelIterator};
6use std::collections::hash_map::RandomState;
7
8impl<K, S> ParallelExtend<K> for DashSet<K, S>
9where
10    K: Send + Sync + Eq + Hash,
11    S: Send + Sync + Clone + BuildHasher,
12{
13    fn par_extend<I>(&mut self, par_iter: I)
14    where
15        I: IntoParallelIterator<Item = K>,
16    {
17        (&*self).par_extend(par_iter);
18    }
19}
20
21// Since we don't actually need mutability, we can implement this on a
22// reference, similar to `io::Write for &File`.
23impl<K, S> ParallelExtend<K> for &'_ DashSet<K, S>
24where
25    K: Send + Sync + Eq + Hash,
26    S: Send + Sync + Clone + BuildHasher,
27{
28    fn par_extend<I>(&mut self, par_iter: I)
29    where
30        I: IntoParallelIterator<Item = K>,
31    {
32        let &mut set = self;
33        par_iter.into_par_iter().for_each(move |key| {
34            set.insert(key);
35        });
36    }
37}
38
39impl<K, S> FromParallelIterator<K> for DashSet<K, S>
40where
41    K: Send + Sync + Eq + Hash,
42    S: Send + Sync + Clone + Default + BuildHasher,
43{
44    fn from_par_iter<I>(par_iter: I) -> Self
45    where
46        I: IntoParallelIterator<Item = K>,
47    {
48        let set = Self::default();
49        (&set).par_extend(par_iter);
50        set
51    }
52}
53
54impl<K, S> IntoParallelIterator for DashSet<K, S>
55where
56    K: Send + Eq + Hash,
57    S: Send + Clone + BuildHasher,
58{
59    type Iter = OwningIter<K, S>;
60    type Item = K;
61
62    fn into_par_iter(self) -> Self::Iter {
63        OwningIter {
64            inner: self.inner.into_par_iter(),
65        }
66    }
67}
68
69pub struct OwningIter<K, S = RandomState> {
70    inner: super::map::OwningIter<K, (), S>,
71}
72
73impl<K, S> ParallelIterator for OwningIter<K, S>
74where
75    K: Send + Eq + Hash,
76    S: Send + Clone + BuildHasher,
77{
78    type Item = K;
79
80    fn drive_unindexed<C>(self, consumer: C) -> C::Result
81    where
82        C: UnindexedConsumer<Self::Item>,
83    {
84        self.inner.map(|(k, _)| k).drive_unindexed(consumer)
85    }
86}
87
88// This impl also enables `IntoParallelRefIterator::par_iter`
89impl<'a, K, S> IntoParallelIterator for &'a DashSet<K, S>
90where
91    K: Send + Sync + Eq + Hash,
92    S: Send + Sync + Clone + BuildHasher,
93{
94    type Iter = Iter<'a, K, S>;
95    type Item = RefMulti<'a, K, S>;
96
97    fn into_par_iter(self) -> Self::Iter {
98        Iter {
99            inner: (&self.inner).into_par_iter(),
100        }
101    }
102}
103
104pub struct Iter<'a, K, S = RandomState> {
105    inner: super::map::Iter<'a, K, (), S>,
106}
107
108impl<'a, K, S> ParallelIterator for Iter<'a, K, S>
109where
110    K: Send + Sync + Eq + Hash,
111    S: Send + Sync + Clone + BuildHasher,
112{
113    type Item = RefMulti<'a, K, S>;
114
115    fn drive_unindexed<C>(self, consumer: C) -> C::Result
116    where
117        C: UnindexedConsumer<Self::Item>,
118    {
119        self.inner.map(RefMulti::new).drive_unindexed(consumer)
120    }
121}
hydra_dashmap/rayon/set.rs

hydra_dashmap/rayon/
set.rs
