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| author | jeff <jeff@FreeBSD.org> | 2013-06-13 20:46:03 +0000 |
|---|---|---|
| committer | jeff <jeff@FreeBSD.org> | 2013-06-13 20:46:03 +0000 |
| commit | 7ee88fb112275ba704d022b9feebc6bbd4cddf2e (patch) | |
| tree | 88a1eaa0fdaa8c6f93574ecfb224a95f498892b9 /sys/sys/bitset.h | |
| parent | 21c714c60959a0ddca57e0500d0f93287099f971 (diff) | |
| download | FreeBSD-src-7ee88fb112275ba704d022b9feebc6bbd4cddf2e.zip FreeBSD-src-7ee88fb112275ba704d022b9feebc6bbd4cddf2e.tar.gz | |
- Add a BIT_FFS() macro and use it to replace cpusetffs_obj()
Discussed with: attilio
Sponsored by: EMC / Isilon Storage Division
Diffstat (limited to 'sys/sys/bitset.h')
| -rw-r--r-- | sys/sys/bitset.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sys/sys/bitset.h b/sys/sys/bitset.h index c93cb2c..dee5542 100644 --- a/sys/sys/bitset.h +++ b/sys/sys/bitset.h @@ -150,4 +150,19 @@ (f)->__bits[__i]); \ } while (0) +#define BIT_FFS(_s, p) __extension__ ({ \ + __size_t __i; \ + int __bit; \ + \ + __bit = 0; \ + for (__i = 0; __i < __bitset_words((_s)); __i++) { \ + if ((p)->__bits[__i] != 0) { \ + __bit = ffsl((p)->__bits[__i]); \ + __bit += __i * _BITSET_BITS; \ + break; \ + } \ + } \ + __bit; \ +}) + #endif /* !_SYS_BITSET_H_ */ |
