diff options
Diffstat (limited to 'OpenAL32/Include/alMain.h')
| -rw-r--r-- | OpenAL32/Include/alMain.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/OpenAL32/Include/alMain.h b/OpenAL32/Include/alMain.h index 783a90de..77144a29 100644 --- a/OpenAL32/Include/alMain.h +++ b/OpenAL32/Include/alMain.h @@ -42,11 +42,28 @@ #ifdef __GNUC__ +/* LIKELY optimizes the case where the condition is true. The condition is not + * required to be true, but it can result in more optimal code for the true + * path at the expense of a less optimal false path. + */ #define LIKELY(x) __builtin_expect(!!(x), !0) +/* The opposite of LIKELY, optimizing the case where the condition is false. */ #define UNLIKELY(x) __builtin_expect(!!(x), 0) +/* Unlike LIKELY, ASSUME requires the condition to be true or else it invokes + * undefined behavior. It's essentially an assert without actually checking the + * condition at run-time, allowing for stronger optimizations than LIKELY. + */ +#define ASSUME(x) do { if(!(x)) __builtin_unreachable(); } while(0) + #else + #define LIKELY(x) (!!(x)) #define UNLIKELY(x) (!!(x)) +#ifdef _MSC_VER +#define ASSUME __assume +#else +#define ASSUME(x) ((void)0) +#endif #endif #ifndef UINT64_MAX |