Adding upstream version 0.70.1+ds1.upstream/0.70.1+ds1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 161 insertions, 0 deletions

diff --git a/vendor/thread_local/src/cached.rs b/vendor/thread_local/src/cached.rs
new file mode 100644
index 0000000..16f6516
--- /dev/null
+++ b/vendor/thread_local/src/cached.rs
@@ -0,0 +1,161 @@
+#![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> {}