From 1dcb10eeb6912824ddf257dab8121a2a87260a3d Mon Sep 17 00:00:00 2001 From: Furquan Shaikh Date: Fri, 6 Nov 2015 22:20:15 -0800 Subject: libpayload: queue: Add a helper macro for checking singleton queue Check if the simple queue consists of only 1 element. BUG=b:24676003 BRANCH=None TEST=Compiles successfully. Change-Id: Ib257a5e6b9042b42c549f8ad8b943e3b75fd8c9c Signed-off-by: Patrick Georgi Original-Commit-Id: 5435d6fec1c4fbb4c04ba5b8c15caff9ee4e50f0 Original-Change-Id: I7a8cb9c4e7e71956e85e65b3e7b8e0af4d354110 Original-Signed-off-by: Furquan Shaikh Original-Reviewed-on: https://chromium-review.googlesource.com/311256 Original-Commit-Ready: Furquan Shaikh Original-Tested-by: Furquan Shaikh Original-Reviewed-by: Aaron Durbin Reviewed-on: http://review.coreboot.org/12412 Reviewed-by: Furquan Shaikh Tested-by: build bot (Jenkins) --- payloads/libpayload/include/queue.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'payloads/libpayload/include') diff --git a/payloads/libpayload/include/queue.h b/payloads/libpayload/include/queue.h index f8f09bf12e..2b64669435 100644 --- a/payloads/libpayload/include/queue.h +++ b/payloads/libpayload/include/queue.h @@ -268,6 +268,9 @@ struct { \ #define SIMPLEQ_END(head) NULL #define SIMPLEQ_EMPTY(head) (SIMPLEQ_FIRST(head) == SIMPLEQ_END(head)) #define SIMPLEQ_NEXT(elm, field) ((elm)->field.sqe_next) +#define SIMPLEQ_TAIL_NEXT(head) ((head)->sqh_last) +#define SIMPLEQ_SINGLETON(head, field) \ + (&SIMPLEQ_NEXT(SIMPLEQ_FIRST(head), field) == SIMPLEQ_TAIL_NEXT(head)) #define SIMPLEQ_FOREACH(var, head, field) \ for((var) = SIMPLEQ_FIRST(head); \ -- cgit v1.2.3