term_detect/
cache.rs

1//! Contains code related to caching the results
2
3use crate::Terminal;
4use once_cell::sync::Lazy;
5use std::sync::Mutex;
6use std::sync::{MutexGuard, PoisonError};
7use thiserror::Error;
8
9pub(crate) static TERMINAL: Lazy<Mutex<Option<Terminal>>> = Lazy::new(|| Mutex::new(None));
10
11#[derive(Error, Debug)]
12pub enum CacheError {
13    #[error("mutex poisoned")]
14    MutexError(#[from] PoisonError<MutexGuard<'static, Option<Terminal>>>),
15    #[error("cache is empty")]
16    EmptyError,
17}
18
19/// Try to get the terminal from the cache
20pub fn cache_get() -> Result<Terminal, CacheError> {
21    let term_lock = TERMINAL.lock()?;
22    match term_lock.clone() {
23        Some(term) => Ok(term),
24        None => Err(CacheError::EmptyError),
25    }
26}
27
28/// Save the provided terminal in the cache
29pub fn cache_set(term: Terminal) -> Result<(), CacheError> {
30    let mut term_lock = TERMINAL.lock()?;
31    term_lock.replace(term);
32    Ok(())
33}
34
35/// Remove the cached terminal
36pub fn cache_clear() -> Result<Option<Terminal>, CacheError> {
37    let mut term_lock = TERMINAL.lock()?;
38    Ok(term_lock.take())
39}
term_detect/cache.rs

term_detect/
cache.rs
