From 27fdf26cc1960ea580f23e1b9108b5b9cd479110 Mon Sep 17 00:00:00 2001
From: Paul Pan <i@0x7f.app>
Date: Thu, 29 Aug 2024 20:41:52 +0800
Subject: [PATCH] feat: utils/linked_list: add `is_empty`

---
 lib/utils/src/linked_list.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/utils/src/linked_list.rs b/lib/utils/src/linked_list.rs
index c637d4c..93e81d4 100644
--- a/lib/utils/src/linked_list.rs
+++ b/lib/utils/src/linked_list.rs
@@ -65,6 +65,12 @@ impl<T: LinkHelper<ID>, const ID: usize> Link<T, ID> {
         &*(container_of_offset!(self, T, T::LINK_OFFSET))
     }
 
+    pub fn is_empty(&self) -> bool {
+        debug_assert!(!(self.prev.is_none() && self.next.is_some()));
+        debug_assert!(!(self.prev.is_some() && self.next.is_none()));
+        self.prev.is_none() && self.next.is_none()
+    }
+
     pub fn prev_raw(&self) -> &Option<AtomicPtr<T>> {
         &self.prev
     }