1 | //! Contains thread-safe variants. |
2 | use super::*; |
3 | use std::sync::Mutex; |
4 | |
5 | /// A thread-safe version of the [`intl_memoizer::IntlLangMemoizer`](super::IntlLangMemoizer). |
6 | /// See the single-thread version for more documentation. |
7 | #[derive (Debug)] |
8 | pub struct IntlLangMemoizer { |
9 | lang: LanguageIdentifier, |
10 | map: Mutex<type_map::concurrent::TypeMap>, |
11 | } |
12 | |
13 | impl IntlLangMemoizer { |
14 | /// Create a new [`IntlLangMemoizer`] that is unique to a specific [`LanguageIdentifier`] |
15 | pub fn new(lang: LanguageIdentifier) -> Self { |
16 | Self { |
17 | lang, |
18 | map: Mutex::new(type_map::concurrent::TypeMap::new()), |
19 | } |
20 | } |
21 | |
22 | /// Lazily initialize and run a formatter. See |
23 | /// [`intl_memoizer::IntlLangMemoizer::with_try_get`](../struct.IntlLangMemoizer.html#method.with_try_get) |
24 | /// for documentation. |
25 | pub fn with_try_get<I, R, U>(&self, args: I::Args, cb: U) -> Result<R, I::Error> |
26 | where |
27 | Self: Sized, |
28 | I: Memoizable + Sync + Send + 'static, |
29 | I::Args: Send + Sync + 'static, |
30 | U: FnOnce(&I) -> R, |
31 | { |
32 | let mut map = self.map.lock().unwrap(); |
33 | let cache = map |
34 | .entry::<HashMap<I::Args, I>>() |
35 | .or_insert_with(HashMap::new); |
36 | |
37 | let e = match cache.entry(args.clone()) { |
38 | Entry::Occupied(entry) => entry.into_mut(), |
39 | Entry::Vacant(entry) => { |
40 | let val = I::construct(self.lang.clone(), args)?; |
41 | entry.insert(val) |
42 | } |
43 | }; |
44 | Ok(cb(e)) |
45 | } |
46 | } |
47 | |