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|
//! A minimal adaption of the `parking_lot` synchronization primitives to the
//! equivalent `std::sync` types.
//!
//! This can be extended to additional types/methods as required.
use std::sync::LockResult;
use std::time::Duration;
// Types that do not need wrapping
pub(crate) use parking_lot::{MutexGuard, RwLockReadGuard, RwLockWriteGuard, WaitTimeoutResult};
/// Adapter for `parking_lot::Mutex` to the `std::sync::Mutex` interface.
#[derive(Debug)]
pub(crate) struct Mutex<T: ?Sized>(parking_lot::Mutex<T>);
#[derive(Debug)]
pub(crate) struct RwLock<T>(parking_lot::RwLock<T>);
/// Adapter for `parking_lot::Condvar` to the `std::sync::Condvar` interface.
#[derive(Debug)]
pub(crate) struct Condvar(parking_lot::Condvar);
impl<T> Mutex<T> {
#[inline]
pub(crate) fn new(t: T) -> Mutex<T> {
Mutex(parking_lot::Mutex::new(t))
}
#[inline]
#[cfg(all(feature = "parking_lot", not(all(loom, test)),))]
#[cfg_attr(docsrs, doc(cfg(all(feature = "parking_lot",))))]
pub(crate) const fn const_new(t: T) -> Mutex<T> {
Mutex(parking_lot::const_mutex(t))
}
#[inline]
pub(crate) fn lock(&self) -> MutexGuard<'_, T> {
self.0.lock()
}
#[inline]
pub(crate) fn try_lock(&self) -> Option<MutexGuard<'_, T>> {
self.0.try_lock()
}
#[inline]
pub(crate) fn get_mut(&mut self) -> &mut T {
self.0.get_mut()
}
// Note: Additional methods `is_poisoned` and `into_inner`, can be
// provided here as needed.
}
impl<T> RwLock<T> {
pub(crate) fn new(t: T) -> RwLock<T> {
RwLock(parking_lot::RwLock::new(t))
}
pub(crate) fn read(&self) -> LockResult<RwLockReadGuard<'_, T>> {
Ok(self.0.read())
}
pub(crate) fn write(&self) -> LockResult<RwLockWriteGuard<'_, T>> {
Ok(self.0.write())
}
}
impl Condvar {
#[inline]
pub(crate) fn new() -> Condvar {
Condvar(parking_lot::Condvar::new())
}
#[inline]
pub(crate) fn notify_one(&self) {
self.0.notify_one();
}
#[inline]
pub(crate) fn notify_all(&self) {
self.0.notify_all();
}
#[inline]
pub(crate) fn wait<'a, T>(
&self,
mut guard: MutexGuard<'a, T>,
) -> LockResult<MutexGuard<'a, T>> {
self.0.wait(&mut guard);
Ok(guard)
}
#[inline]
pub(crate) fn wait_timeout<'a, T>(
&self,
mut guard: MutexGuard<'a, T>,
timeout: Duration,
) -> LockResult<(MutexGuard<'a, T>, WaitTimeoutResult)> {
let wtr = self.0.wait_for(&mut guard, timeout);
Ok((guard, wtr))
}
// Note: Additional methods `wait_timeout_ms`, `wait_timeout_until`,
// `wait_until` can be provided here as needed.
}
|
