From 51dd003f176f649cee297f35d11fc01236cf9120 Mon Sep 17 00:00:00 2001
From: Botahamec <botahamec@outlook.com>
Date: Sun, 5 Jan 2025 18:23:10 -0500
Subject: Make ThreadKey Sync

---
 src/key.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/key.rs b/src/key.rs
index 589f411..768f09e 100644
--- a/src/key.rs
+++ b/src/key.rs
@@ -39,6 +39,10 @@ unsafe impl Keyable for ThreadKey {}
 // the ThreadKey can't be moved while a mutable reference to it exists
 unsafe impl Keyable for &mut ThreadKey {}
 
+// Implementing this means we can allow `MutexGuard` to be Sync
+// Safety: a &ThreadKey is useless by design.
+unsafe impl Sync for ThreadKey {}
+
 impl Debug for ThreadKey {
 	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 		write!(f, "ThreadKey")
-- 
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