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// Copyright (c) 2013, 2014, 2015, 2016 Michael Woerister // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. use std::sync::Arc; //=------------------------------------------------------------------------------------------------- // trait ItemStore //=------------------------------------------------------------------------------------------------- pub trait ItemStore<K, V>: Clone+Send+Sync { fn key<'a>(&'a self) -> &'a K; fn val<'a>(&'a self) -> &'a V; fn new(key: K, val: V) -> Self; } //=------------------------------------------------------------------------------------------------- // struct CopyStore //=------------------------------------------------------------------------------------------------- pub struct CopyStore<K, V> { key: K, val: V } impl<K: Clone+Send+Sync, V: Clone+Send+Sync> ItemStore<K, V> for CopyStore<K, V> { fn key<'a>(&'a self) -> &'a K { &self.key } fn val<'a>(&'a self) -> &'a V { &self.val } fn new(key: K, val: V) -> CopyStore<K, V> { CopyStore { key: key, val: val } } } impl<K: Clone+Send+Sync, V: Clone+Send+Sync> Clone for CopyStore<K, V> { fn clone(&self) -> CopyStore<K, V> { CopyStore { key: self.key.clone(), val: self.val.clone(), } } } //=------------------------------------------------------------------------------------------------- // struct ShareStore //=------------------------------------------------------------------------------------------------- pub struct ShareStore<K, V> { store: Arc<(K, V)>, } impl<K: Send+Sync, V: Send+Sync> ItemStore<K, V> for ShareStore<K, V> { fn key<'a>(&'a self) -> &'a K { &self.store.0 } fn val<'a>(&'a self) -> &'a V { &self.store.1 } fn new(k: K, v: V) -> ShareStore<K, V> { ShareStore { store: Arc::new((k, v)) } } } impl<K: Send+Sync, V: Send+Sync> Clone for ShareStore<K, V> { fn clone(&self) -> ShareStore<K, V> { ShareStore { store: self.store.clone() } } }