// This Source Code Form is subject to the terms of the Mozilla Public

// License, v. 2.0. If a copy of the MPL was not distributed with this

// file, You can obtain one at http://mozilla.org/MPL/2.0/.

pub(crate) use self::lock::Lock;

// FIXME: This is intended to be replaced by something else when using the non-threadsafe, `Rc`

// version of this crate. We have temporarily disabled that.

mod lock {

use std::sync::{Arc, Mutex, MutexGuard};

/// Thread safe lock: just wraps a `Mutex`.

pub(crate) struct Lock<A> {

lock: Arc<Mutex<A>>,

}

impl<A> Lock<A> {

pub(crate) fn new(value: A) -> Self {

Lock {

lock: Arc::new(Mutex::new(value)),

}

}

#[inline]

pub(crate) fn lock(&mut self) -> Option<MutexGuard<'_, A>> {

self.lock.lock().ok()

}

}

impl<A> Clone for Lock<A> {

fn clone(&self) -> Self {

Lock {

lock: self.lock.clone(),

}

}

}

}