rust-switcher 1.0.9

Windows keyboard layout switcher and text conversion utility
Documentation 
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use std::sync::{Mutex, MutexGuard, OnceLock};

pub(super) fn lock_env() -> MutexGuard<'static, ()> {
    static ENV_LOCK: OnceLock<Mutex<()>> = OnceLock::new();
    ENV_LOCK
        .get_or_init(|| Mutex::new(()))
        .lock()
        .unwrap_or_else(|e| e.into_inner())
}