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Provide TAILQ_REPLACE for tmux, from FreeBSD.

This commit is contained in:
christos 2013-11-26 01:27:46 +00:00
parent 6b6949f4cd
commit 05617891c6
1 changed files with 13 additions and 1 deletions
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14
sys/sys/queue.h
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@ -1,4 +1,4 @@
/* $NetBSD: queue.h,v 1.59 2013/11/25 03:02:57 christos Exp $ */
/* $NetBSD: queue.h,v 1.60 2013/11/26 01:27:46 christos Exp $ */
/*
* Copyright (c) 1991, 1993
@ -556,6 +556,18 @@ struct { \
QUEUEDEBUG_TAILQ_POSTREMOVE((elm), field); \
} while (/*CONSTCOND*/0)
#define TAILQ_REPLACE(head, elm, elm2, field) do { \
if (((elm2)->field.tqe_next = (elm)->field.tqe_next) != \
TAILQ_END(head)) \
(elm2)->field.tqe_next->field.tqe_prev = \
&(elm2)->field.tqe_next; \
else \
(head)->tqh_last = &(elm2)->field.tqe_next; \
(elm2)->field.tqe_prev = (elm)->field.tqe_prev; \
*(elm2)->field.tqe_prev = (elm2); \
QUEUEDEBUG_TAILQ_POSTREMOVE((elm), field); \
} while (/*CONSTCOND*/0)
#define TAILQ_FOREACH(var, head, field) \
for ((var) = ((head)->tqh_first); \
(var) != TAILQ_END(head); \