From: Jaroslav Kysela <perex@perex.cz>
Date: Wed, 6 Mar 2019 19:08:29 +0000 (+0100)
Subject: queue.h: add missing TAILQ_SAFE_ENTRY()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d64d8c808a35b1308c38168a15152f59c5b13a70;p=thirdparty%2Ftvheadend.git

queue.h: add missing TAILQ_SAFE_ENTRY()
---

diff --git a/src/queue.h b/src/queue.h
index 3388b46fc..70453a515 100644
--- a/src/queue.h
+++ b/src/queue.h
@@ -68,6 +68,16 @@
  * Extra TAILQ-ops
  */
 
+#define TAILQ_SAFE_ENTRY(elm, field) \
+        ((elm)->field.tqe_next == NULL && (elm)->field.tqe_prev == NULL)
+
+#define TAILQ_SAFE_REMOVE(head, elm, field)			\
+        if ((elm)->field.tqe_next != NULL || (elm)->field.tqe_prev != NULL) { \
+           TAILQ_REMOVE(head, elm, field);			\
+           (elm)->field.tqe_next = NULL;			\
+           (elm)->field.tqe_prev = NULL;			\
+        }
+
 #define TAILQ_INSERT_SORTED(head, elm, field, cmpfunc) do {	\
         if(TAILQ_FIRST(head) == NULL) {				\
            TAILQ_INSERT_HEAD(head, elm, field);			\