From: jlayton@poochiereds.net (Jeff Layton)
Subject: [lttng-dev] [PATCH urcu] urcu: add cds_list_for_each_entry_safe_from macro
Date: Thu, 30 Apr 2015 07:50:05 -0400 [thread overview]
Message-ID: <1430394605-27519-1-git-send-email-jeff.layton@primarydata.com> (raw)
Same as cds_list_for_each_entry_safe, but starts at an arbitrary point
within the list instead of at the head.
Signed-off-by: Jeff Layton <jeff.layton at primarydata.com>
---
urcu/list.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/urcu/list.h b/urcu/list.h
index b4962b445dfb..4aaf869351fe 100644
--- a/urcu/list.h
+++ b/urcu/list.h
@@ -171,6 +171,15 @@ void cds_list_splice(struct cds_list_head *add, struct cds_list_head *head)
&pos->member != (head); \
pos = p, p = cds_list_entry(pos->member.next, __typeof__(*pos), member))
+/*
+ * Same as cds_list_for_each_entry_safe, but starts from "pos" which should
+ * point to an entry within the list.
+ */
+#define cds_list_for_each_entry_safe_from(pos, p, head, member) \
+ for (p = cds_list_entry(pos->member.next, __typeof__(*pos), member); \
+ &pos->member != (head); \
+ pos = p, p = cds_list_entry(pos->member.next, __typeof__(*pos), member))
+
static inline
int cds_list_empty(struct cds_list_head *head)
{
--
2.1.0
reply other threads:[~2015-04-30 11:50 UTC|newest]
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