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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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4
lib/util.h
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@@ -189,9 +189,9 @@ is_pow2(uintmax_t x)
* that that OBJECT points to, assigns the address of the outer object to
* OBJECT, which must be an lvalue.
*
* Evaluates to 1. */
* Evaluates to (void) 0 as the result is not to be used. */
#define ASSIGN_CONTAINER(OBJECT, POINTER, MEMBER) \
((OBJECT) = OBJECT_CONTAINING(POINTER, OBJECT, MEMBER), 1)
((OBJECT) = OBJECT_CONTAINING(POINTER, OBJECT, MEMBER), (void) 0)
#ifdef __cplusplus
extern "C" {