From: Rob Clark <robclark@freedesktop.org>
Date: Tue, 21 Jun 2016 15:33:30 +0000 (-0400)
Subject: list: add first/last entry macros
X-Git-Tag: libdrm-2.4.70~14
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1d1e01b2350e40711fcf19e200e46e2edfd887b2;p=platform%2Fupstream%2Flibdrm.git

list: add first/last entry macros

Signed-off-by: Rob Clark <robclark@freedesktop.org>
---

diff --git a/util_double_list.h b/util_double_list.h
index 27e0761..5d01f52 100644
--- a/util_double_list.h
+++ b/util_double_list.h
@@ -98,6 +98,12 @@ static inline void list_delinit(struct list_head *item)
 #define LIST_ENTRY(__type, __item, __field)   \
     ((__type *)(((char *)(__item)) - offsetof(__type, __field)))
 
+#define LIST_FIRST_ENTRY(__ptr, __type, __field)   \
+    LIST_ENTRY(__type, (__ptr)->next, __field)
+
+#define LIST_LAST_ENTRY(__ptr, __type, __field)   \
+    LIST_ENTRY(__type, (__ptr)->prev, __field)
+
 #define LIST_IS_EMPTY(__list)                   \
     ((__list)->next == (__list))