diff options
Diffstat (limited to 'klm/util/exception.hh')
| -rw-r--r-- | klm/util/exception.hh | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/klm/util/exception.hh b/klm/util/exception.hh index 053a850b..0165a7a3 100644 --- a/klm/util/exception.hh +++ b/klm/util/exception.hh @@ -87,8 +87,14 @@ template <class Except, class Data> typename Except::template ExceptionTag<Excep throw UTIL_e; \ } while (0) +#if __GNUC__ >= 3 +#define UTIL_UNLIKELY(x) __builtin_expect (!!(x), 0) +#else +#define UTIL_UNLIKELY(x) (x) +#endif + #define UTIL_THROW_IF(Condition, Exception, Modify) do { \ - if (Condition) { \ + if (UTIL_UNLIKELY(Condition)) { \ Exception UTIL_e; \ UTIL_SET_LOCATION(UTIL_e, #Exception, #Condition); \ UTIL_e << Modify; \ |