From 6066089cc1726e71c176ef9caa25fa8a0145f3bd Mon Sep 17 00:00:00 2001
From: Alex Orlenko <zxteam@protonmail.com>
Date: Wed, 30 Oct 2024 23:32:13 +0000
Subject: [PATCH] Skip setting `Send`/`Sync` in non-send mode for
 `UserDataCell`

---
 src/userdata/cell.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/userdata/cell.rs b/src/userdata/cell.rs
index fe3a019..bd3b803 100644
--- a/src/userdata/cell.rs
+++ b/src/userdata/cell.rs
@@ -132,7 +132,9 @@ pub(crate) struct UserDataCell<T> {
     value: UnsafeCell<T>,
 }
 
+#[cfg(feature = "send")]
 unsafe impl<T: Send> Send for UserDataCell<T> {}
+#[cfg(feature = "send")]
 unsafe impl<T: Send> Sync for UserDataCell<T> {}
 
 impl<T> UserDataCell<T> {