1 files changed, 89 insertions, 0 deletions
diff --git a/vendor/rustls/src/lock.rs b/vendor/rustls/src/lock.rs
new file mode 100644
index 00000000..b632b2c5
--- /dev/null
+++ b/vendor/rustls/src/lock.rs
@@ -0,0 +1,89 @@
+#[cfg(not(feature = "std"))]
+pub use no_std_lock::*;
+#[cfg(feature = "std")]
+pub use std_lock::*;
+
+#[cfg(feature = "std")]
+mod std_lock {
+    use std::sync::Mutex as StdMutex;
+    pub use std::sync::MutexGuard;
+
+    /// A wrapper around [`std::sync::Mutex`].
+    #[derive(Debug)]
+    pub struct Mutex<T> {
+        inner: StdMutex<T>,
+    }
+
+    impl<T> Mutex<T> {
+        /// Creates a new mutex in an unlocked state ready for use.
+        pub fn new(data: T) -> Self {
+            Self {
+                inner: StdMutex::new(data),
+            }
+        }
+
+        /// Acquires the mutex, blocking the current thread until it is able to do so.
+        ///
+        /// This will return `None` in the case the mutex is poisoned.
+        #[inline]
+        pub fn lock(&self) -> Option<MutexGuard<'_, T>> {
+            self.inner.lock().ok()
+        }
+    }
+}
+
+#[cfg(not(feature = "std"))]
+mod no_std_lock {
+    use alloc::boxed::Box;
+    use core::fmt::Debug;
+    use core::ops::DerefMut;
+
+    use crate::sync::Arc;
+
+    /// A no-std compatible wrapper around [`Lock`].
+    #[derive(Debug)]
+    pub struct Mutex<T> {
+        inner: Arc<dyn Lock<T>>,
+    }
+
+    impl<T: Send + 'static> Mutex<T> {
+        /// Creates a new mutex in an unlocked state ready for use.
+        pub fn new<M>(val: T) -> Self
+        where
+            M: MakeMutex,
+            T: Send + 'static,
+        {
+            Self {
+                inner: M::make_mutex(val),
+            }
+        }
+
+        /// Acquires the mutex, blocking the current thread until it is able to do so.
+        ///
+        /// This will return `None` in the case the mutex is poisoned.
+        #[inline]
+        pub fn lock(&self) -> Option<MutexGuard<'_, T>> {
+            self.inner.lock().ok()
+        }
+    }
+
+    /// A lock protecting shared data.
+    pub trait Lock<T>: Debug + Send + Sync {
+        /// Acquire the lock.
+        fn lock(&self) -> Result<MutexGuard<'_, T>, Poisoned>;
+    }
+
+    /// A lock builder.
+    pub trait MakeMutex {
+        /// Create a new mutex.
+        fn make_mutex<T>(value: T) -> Arc<dyn Lock<T>>
+        where
+            T: Send + 'static;
+    }
+
+    /// A no-std compatible mutex guard.
+    pub type MutexGuard<'a, T> = Box<dyn DerefMut<Target = T> + 'a>;
+
+    /// A marker type used to indicate `Lock::lock` failed due to a poisoned lock.
+    pub struct Poisoned;
+}