projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| 1f2f436a A |
1 | #ifndef __OSX_ASSUMES_H__ |
| 2 | #define __OSX_ASSUMES_H__ | |
| 3 | ||
| 4 | #include <sys/cdefs.h> | |
| 5 | ||
| 6 | __BEGIN_DECLS | |
| 7 | ||
| 8 | #include <Availability.h> | |
| 9 | #include <stdlib.h> | |
| 10 | #include <stdint.h> | |
| 11 | #include <stdarg.h> | |
| 12 | #include <stdbool.h> | |
| 13 | #include <asl.h> | |
| 14 | ||
| 15 | #if __GNUC__ | |
| 16 | #define osx_fastpath(x) ((typeof(x))__builtin_expect((long)(x), ~0l)) | |
| 17 | #define osx_slowpath(x) ((typeof(x))__builtin_expect((long)(x), 0l)) | |
| 18 | #define osx_constant(x) __builtin_constant_p((x)) | |
| 19 | ||
| 20 | #define __OSX_COMPILETIME_ASSERT__(e) ({ \ | |
| 21 | char __compile_time_assert__[(e) ? 1 : -1]; \ | |
| 22 | (void)__compile_time_assert__; \ | |
| 23 | }) | |
| 24 | #else | |
| 25 | #define osx_fastpath(x) (x) | |
| 26 | #define osx_slowpath(x) (x) | |
| 27 | #define osx_constant(x) ((long)0) | |
| 28 | ||
| 29 | #define __OSX_COMPILETIME_ASSERT__(e) (e) | |
| 30 | #endif /* __GNUC__ */ | |
| 31 | ||
| 32 | #define osx_assumes(e) ({ \ | |
| 33 | typeof(e) _e = osx_fastpath(e); /* Force evaluation of 'e' */ \ | |
| 34 | if (!_e) { \ | |
| 35 | if (osx_constant(e)) { \ | |
| 36 | __OSX_COMPILETIME_ASSERT__(e); \ | |
| 37 | } \ | |
| 38 | _osx_assumes_log((uintptr_t)_e); \ | |
| 39 | } \ | |
| 40 | _e; \ | |
| 41 | }) | |
| 42 | ||
| 43 | #define osx_assumes_zero(e) ({ \ | |
| 44 | typeof(e) _e = osx_slowpath(e); /* Force evaluation of 'e' */ \ | |
| 45 | if (_e) { \ | |
| 46 | if (osx_constant(e)) { \ | |
| 47 | __OSX_COMPILETIME_ASSERT__(!e); \ | |
| 48 | } \ | |
| 49 | _osx_assumes_log((uintptr_t)_e); \ | |
| 50 | } \ | |
| 51 | _e; \ | |
| 52 | }) | |
| 53 | ||
| 54 | __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3) | |
| 55 | extern void | |
| 56 | _osx_assumes_log(uint64_t code); | |
| 57 | ||
| 58 | __END_DECLS | |
| 59 | ||
| 60 | #endif /* __OSX_ASSUMES_H__ */ |