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Diffstat (limited to '')
-rw-r--r-- | vendor/dashmap/src/rayon/read_only.rs | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/vendor/dashmap/src/rayon/read_only.rs b/vendor/dashmap/src/rayon/read_only.rs new file mode 100644 index 000000000..a11448cee --- /dev/null +++ b/vendor/dashmap/src/rayon/read_only.rs @@ -0,0 +1,96 @@ +use crate::mapref::multiple::RefMulti; +use crate::rayon::map::Iter; +use crate::ReadOnlyView; +use core::hash::{BuildHasher, Hash}; +use rayon::iter::IntoParallelIterator; + +impl<K, V, S> IntoParallelIterator for ReadOnlyView<K, V, S> +where + K: Send + Eq + Hash, + V: Send, + S: Send + Clone + BuildHasher, +{ + type Iter = super::map::OwningIter<K, V, S>; + type Item = (K, V); + + fn into_par_iter(self) -> Self::Iter { + super::map::OwningIter { + shards: self.map.shards, + } + } +} + +// This impl also enables `IntoParallelRefIterator::par_iter` +impl<'a, K, V, S> IntoParallelIterator for &'a ReadOnlyView<K, V, S> +where + K: Send + Sync + Eq + Hash, + V: Send + Sync, + S: Send + Sync + Clone + BuildHasher, +{ + type Iter = Iter<'a, K, V, S>; + type Item = RefMulti<'a, K, V, S>; + + fn into_par_iter(self) -> Self::Iter { + Iter { + shards: &self.map.shards, + } + } +} + +#[cfg(test)] +mod tests { + use crate::DashMap; + use rayon::iter::{IntoParallelIterator, IntoParallelRefIterator, ParallelIterator}; + + fn construct_sample_map() -> DashMap<i32, String> { + let map = DashMap::new(); + + map.insert(1, "one".to_string()); + + map.insert(10, "ten".to_string()); + + map.insert(27, "twenty seven".to_string()); + + map.insert(45, "forty five".to_string()); + + map + } + + #[test] + fn test_par_iter() { + let map = construct_sample_map(); + + let view = map.clone().into_read_only(); + + view.par_iter().for_each(|entry| { + let key = *entry.key(); + + assert!(view.contains_key(&key)); + + let map_entry = map.get(&key).unwrap(); + + assert_eq!(view.get(&key).unwrap(), map_entry.value()); + + let key_value: (&i32, &String) = view.get_key_value(&key).unwrap(); + + assert_eq!(key_value.0, map_entry.key()); + + assert_eq!(key_value.1, map_entry.value()); + }); + } + + #[test] + fn test_into_par_iter() { + let map = construct_sample_map(); + + let view = map.clone().into_read_only(); + + view.into_par_iter().for_each(|(key, value)| { + let map_entry = map.get(&key).unwrap(); + + assert_eq!(&key, map_entry.key()); + + assert_eq!(&value, map_entry.value()); + }); + } +} |