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#![allow(deprecated)]
use super::{IntoIter, IterMut, ThreadLocal};
use std::fmt;
use std::panic::UnwindSafe;
use std::usize;
/// Wrapper around [`ThreadLocal`].
///
/// This used to add a fast path for a single thread, however that has been
/// obsoleted by performance improvements to [`ThreadLocal`] itself.
#[deprecated(since = "1.1.0", note = "Use `ThreadLocal` instead")]
pub struct CachedThreadLocal<T: Send> {
inner: ThreadLocal<T>,
}
impl<T: Send> Default for CachedThreadLocal<T> {
fn default() -> CachedThreadLocal<T> {
CachedThreadLocal::new()
}
}
impl<T: Send> CachedThreadLocal<T> {
/// Creates a new empty `CachedThreadLocal`.
#[inline]
pub fn new() -> CachedThreadLocal<T> {
CachedThreadLocal {
inner: ThreadLocal::new(),
}
}
/// Returns the element for the current thread, if it exists.
#[inline]
pub fn get(&self) -> Option<&T> {
self.inner.get()
}
/// Returns the element for the current thread, or creates it if it doesn't
/// exist.
#[inline]
pub fn get_or<F>(&self, create: F) -> &T
where
F: FnOnce() -> T,
{
self.inner.get_or(create)
}
/// Returns the element for the current thread, or creates it if it doesn't
/// exist. If `create` fails, that error is returned and no element is
/// added.
#[inline]
pub fn get_or_try<F, E>(&self, create: F) -> Result<&T, E>
where
F: FnOnce() -> Result<T, E>,
{
self.inner.get_or_try(create)
}
/// Returns a mutable iterator over the local values of all threads.
///
/// Since this call borrows the `ThreadLocal` mutably, this operation can
/// be done safely---the mutable borrow statically guarantees no other
/// threads are currently accessing their associated values.
#[inline]
pub fn iter_mut(&mut self) -> CachedIterMut<T> {
CachedIterMut {
inner: self.inner.iter_mut(),
}
}
/// Removes all thread-specific values from the `ThreadLocal`, effectively
/// reseting it to its original state.
///
/// Since this call borrows the `ThreadLocal` mutably, this operation can
/// be done safely---the mutable borrow statically guarantees no other
/// threads are currently accessing their associated values.
#[inline]
pub fn clear(&mut self) {
self.inner.clear();
}
}
impl<T: Send> IntoIterator for CachedThreadLocal<T> {
type Item = T;
type IntoIter = CachedIntoIter<T>;
fn into_iter(self) -> CachedIntoIter<T> {
CachedIntoIter {
inner: self.inner.into_iter(),
}
}
}
impl<'a, T: Send + 'a> IntoIterator for &'a mut CachedThreadLocal<T> {
type Item = &'a mut T;
type IntoIter = CachedIterMut<'a, T>;
fn into_iter(self) -> CachedIterMut<'a, T> {
self.iter_mut()
}
}
impl<T: Send + Default> CachedThreadLocal<T> {
/// Returns the element for the current thread, or creates a default one if
/// it doesn't exist.
pub fn get_or_default(&self) -> &T {
self.get_or(T::default)
}
}
impl<T: Send + fmt::Debug> fmt::Debug for CachedThreadLocal<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "ThreadLocal {{ local_data: {:?} }}", self.get())
}
}
impl<T: Send + UnwindSafe> UnwindSafe for CachedThreadLocal<T> {}
/// Mutable iterator over the contents of a `CachedThreadLocal`.
#[deprecated(since = "1.1.0", note = "Use `IterMut` instead")]
pub struct CachedIterMut<'a, T: Send + 'a> {
inner: IterMut<'a, T>,
}
impl<'a, T: Send + 'a> Iterator for CachedIterMut<'a, T> {
type Item = &'a mut T;
#[inline]
fn next(&mut self) -> Option<&'a mut T> {
self.inner.next()
}
#[inline]
fn size_hint(&self) -> (usize, Option<usize>) {
self.inner.size_hint()
}
}
impl<'a, T: Send + 'a> ExactSizeIterator for CachedIterMut<'a, T> {}
/// An iterator that moves out of a `CachedThreadLocal`.
#[deprecated(since = "1.1.0", note = "Use `IntoIter` instead")]
pub struct CachedIntoIter<T: Send> {
inner: IntoIter<T>,
}
impl<T: Send> Iterator for CachedIntoIter<T> {
type Item = T;
#[inline]
fn next(&mut self) -> Option<T> {
self.inner.next()
}
#[inline]
fn size_hint(&self) -> (usize, Option<usize>) {
self.inner.size_hint()
}
}
impl<T: Send> ExactSizeIterator for CachedIntoIter<T> {}
|
