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Use likely/__builtin_expect for assertion macros.

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(cherry picked from commit f82002cda2)
This commit is contained in:
Jonathan G Rennison
2016-03-10 00:13:58 +00:00
parent 0b7d68a6d1
commit bb6ea150a3
1 changed files with 10 additions and 2 deletions
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12
src/stdafx.h
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@@ -431,6 +431,14 @@ assert_compile(SIZE_MAX >= UINT32_MAX);
#define CloseConnection OTTD_CloseConnection
#endif /* __APPLE__ */
#ifdef __GNUC__
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define likely(x) (x)
#define unlikely(x) (x)
#endif
void NORETURN CDECL usererror(const char *str, ...) WARN_FORMAT(1, 2);
void NORETURN CDECL error(const char *str, ...) WARN_FORMAT(1, 2);
void NORETURN CDECL assert_msg_error(int line, const char *file, const char *expr, const char *str, ...) WARN_FORMAT(4, 5);
@@ -442,13 +450,13 @@ void NORETURN CDECL assert_msg_error(int line, const char *file, const char *exp
*/
#if (defined(_MSC_VER) && defined(NDEBUG) && defined(WITH_ASSERT)) || (!defined(_MSC_VER) && !defined(NDEBUG) && !defined(_DEBUG))
#undef assert
#define assert(expression) if (!(expression)) error("Assertion failed at line %i of %s: %s", __LINE__, __FILE__, #expression);
#define assert(expression) if (unlikely(!(expression))) error("Assertion failed at line %i of %s: %s", __LINE__, __FILE__, #expression);
#endif
/* Asserts are enabled if NDEBUG isn't defined, or if we are using MSVC and WITH_ASSERT is defined. */
#if !defined(NDEBUG) || (defined(_MSC_VER) && defined(WITH_ASSERT))
#define OTTD_ASSERT
#define assert_msg(expression, ...) if (!(expression)) assert_msg_error(__LINE__, __FILE__, #expression, __VA_ARGS__);
#define assert_msg(expression, ...) if (unlikely(!(expression))) assert_msg_error(__LINE__, __FILE__, #expression, __VA_ARGS__);
#else
#define assert_msg(expression, ...)
#endif