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| author | Ben Pfaff <blp@nicira.com> | 2013-01-16 16:03:03 -0800 |
|---|---|---|
| committer | Ben Pfaff <blp@nicira.com> | 2013-01-16 16:03:03 -0800 |
| commit | 4749f73d12c844b318af7f45cf45e1acac9f7c08 (patch) | |
| tree | 8b052885968f7cc6f0f281f1dee0a704b1ec4477 /lib/compiler.h | |
| parent | 167744623897a67ef3fd13bcaf44a84d3641fe68 (diff) | |
| download | openvswitch-4749f73d12c844b318af7f45cf45e1acac9f7c08.tar.gz | |
util: Introduce ovs_assert macro.
An occasionally significant problem with the standard "assert" macro is
that it writes the failure message to stderr. In our daemons, stderr is
generally redirected to /dev/null. It's more useful to write the failure
message to the log, which is what the new ovs_assert macro introduced in
this patch does.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
Diffstat (limited to 'lib/compiler.h')
| -rw-r--r-- | lib/compiler.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/compiler.h b/lib/compiler.h index 27612a74a..760389d58 100644 --- a/lib/compiler.h +++ b/lib/compiler.h @@ -26,6 +26,8 @@ #define ALWAYS_INLINE __attribute__((always_inline)) #define WARN_UNUSED_RESULT __attribute__((__warn_unused_result__)) #define SENTINEL(N) __attribute__((sentinel(N))) +#define OVS_LIKELY(CONDITION) __builtin_expect(!!(CONDITION), 1) +#define OVS_UNLIKELY(CONDITION) __builtin_expect(!!(CONDITION), 0) #else #define NO_RETURN #define OVS_UNUSED @@ -35,6 +37,8 @@ #define ALWAYS_INLINE #define WARN_UNUSED_RESULT #define SENTINEL(N) +#define OVS_LIKELY(CONDITION) (!!(CONDITION)) +#define OVS_UNLIKELY(CONDITION) (!!(CONDITION)) #endif /* ISO C says that a C implementation may choose any integer type for an enum |