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comparison: memory/jemalloc/src/include/msvc_compat/strings.h
memory/jemalloc/src/include/msvc_compat/strings.h
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:07b42f0da4db |
|---|---|
| 1 #ifndef strings_h | |
| 2 #define strings_h | |
| 3 | |
| 4 /* MSVC doesn't define ffs/ffsl. This dummy strings.h header is provided | |
| 5 * for both */ | |
| 6 #include <intrin.h> | |
| 7 #pragma intrinsic(_BitScanForward) | |
| 8 static __forceinline int ffsl(long x) | |
| 9 { | |
| 10 unsigned long i; | |
| 11 | |
| 12 if (_BitScanForward(&i, x)) | |
| 13 return (i + 1); | |
| 14 return (0); | |
| 15 } | |
| 16 | |
| 17 static __forceinline int ffs(int x) | |
| 18 { | |
| 19 | |
| 20 return (ffsl(x)); | |
| 21 } | |
| 22 | |
| 23 #endif |
