From eef75524aec3910097cb6923c30b898ad98179fe Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Wed, 24 May 2023 11:54:33 -0400
Subject: list: Allow popping from an empty list

---
 src/list.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/list.h')

diff --git a/src/list.h b/src/list.h
index 89f00ed..a284c25 100644
--- a/src/list.h
+++ b/src/list.h
@@ -280,11 +280,13 @@ static inline void *slist_remove_impl(void *ret, void *cursor, void *next, void
  *         The list to pop from.
  * @param node (optional)
  *         If specified, use head->node.next rather than head->next.
+ * @return
+ *         The popped item, or NULL if the list was empty.
  */
 #define SLIST_POP(...) SLIST_POP_(__VA_ARGS__, )
 
 #define SLIST_POP_(list, ...) \
-	SLIST_REMOVE_(list, &(list)->head, __VA_ARGS__)
+	((list)->head ? SLIST_REMOVE_(list, &(list)->head, __VA_ARGS__) : NULL)
 
 /**
  * Initialize a doubly-linked list.
-- 
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