From 08d2289dad5be8862392ec191c5bc2f71a3139b5 Mon Sep 17 00:00:00 2001
From: Philipp Oppermann <dev@phil-opp.com>
Date: Thu, 9 Jan 2020 15:34:04 +0100
Subject: [PATCH] Add a `Locked` wrapper type that can be used to implement
 GlobalAlloc

---
 src/allocator.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/allocator.rs b/src/allocator.rs
index 4b683208..a52744f4 100644
--- a/src/allocator.rs
+++ b/src/allocator.rs
@@ -54,3 +54,20 @@ unsafe impl GlobalAlloc for Dummy {
         panic!("dealloc should be never called")
     }
 }
+
+/// A wrapper around spin::Mutex to permit trait implementations.
+pub struct Locked<A> {
+    inner: spin::Mutex<A>,
+}
+
+impl<A> Locked<A> {
+    pub const fn new(inner: A) -> Self {
+        Locked {
+            inner: spin::Mutex::new(inner),
+        }
+    }
+
+    pub fn lock(&self) -> spin::MutexGuard<A> {
+        self.inner.lock()
+    }
+}