diff options
Diffstat (limited to 'lib/libc/stdlib/malloc.c')
| -rw-r--r-- | lib/libc/stdlib/malloc.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/lib/libc/stdlib/malloc.c b/lib/libc/stdlib/malloc.c index 4e18a07994d..9111b092c75 100644 --- a/lib/libc/stdlib/malloc.c +++ b/lib/libc/stdlib/malloc.c @@ -8,7 +8,7 @@ */ #if defined(LIBC_SCCS) && !defined(lint) -static char rcsid[] = "$OpenBSD: malloc.c,v 1.17 1996/11/22 16:15:23 kstailey Exp $"; +static char rcsid[] = "$OpenBSD: malloc.c,v 1.18 1996/11/23 19:10:26 niklas Exp $"; #endif /* LIBC_SCCS and not lint */ /* @@ -455,6 +455,28 @@ fls(size) } #endif /* fls */ +#if LONG_BITS == WORD_BITS +#define ffs_ul ffs +#else +static __inline int +ffs_ul(u_long ul) +{ + u_int n; + int i; + int k; + + for (i = 0; i < sizeof (u_long) / sizeof (u_int); i++) { + n = ul & UINT_MAX; + k = ffs (n); + if (k) + break; + ul >>= (sizeof (u_int) * 8); + } + if (k) + k += i * sizeof (u_int) * 8; +} +#endif + /* * Extend page directory */ @@ -838,8 +860,8 @@ malloc_bytes(size) ; /* Find that bit, and tweak it */ - k = ffs((unsigned)*lp) - 1; - *lp ^= 1<<k; + k = ffs_ul(*lp) - 1; + *lp ^= 1UL<<k; /* If there are no more free, remove from free-list */ if (!--bp->free) { |