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clang: Fix the "expression result unused" warning.

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This commit makes macro function "ASSIGN_CONTAINER()" evaluates
to "(void)0". This is to avoid the 'clang' warning: "expression
result unused", since most of time, the final evaluated value
is not used.

Signed-off-by: Alex Wang <alexw@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Alex Wang
2013-07-22 09:19:57 -07:00
committed by Ben Pfaff
parent 55d2690646
commit 33e191a01b
6 changed files with 13 additions and 13 deletions
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10
lib/list.h
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@@ -72,11 +72,11 @@ bool list_is_short(const struct list *);
for (ASSIGN_CONTAINER(ITER, (ITER)->MEMBER.prev, MEMBER); \
&(ITER)->MEMBER != (LIST); \
ASSIGN_CONTAINER(ITER, (ITER)->MEMBER.prev, MEMBER))
#define LIST_FOR_EACH_SAFE(ITER, NEXT, MEMBER, LIST) \
for (ASSIGN_CONTAINER(ITER, (LIST)->next, MEMBER); \
(&(ITER)->MEMBER != (LIST) \
? ASSIGN_CONTAINER(NEXT, (ITER)->MEMBER.next, MEMBER) \
: 0); \
#define LIST_FOR_EACH_SAFE(ITER, NEXT, MEMBER, LIST) \
for (ASSIGN_CONTAINER(ITER, (LIST)->next, MEMBER); \
(&(ITER)->MEMBER != (LIST) \
? ASSIGN_CONTAINER(NEXT, (ITER)->MEMBER.next, MEMBER), 1 \
: 0); \
(ITER) = (NEXT))
#endif /* list.h */