diff options
Diffstat (limited to 'extra/jemalloc/src/bitmap.c')
-rw-r--r-- | extra/jemalloc/src/bitmap.c | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/extra/jemalloc/src/bitmap.c b/extra/jemalloc/src/bitmap.c deleted file mode 100644 index b47e2629093..00000000000 --- a/extra/jemalloc/src/bitmap.c +++ /dev/null @@ -1,90 +0,0 @@ -#define JEMALLOC_BITMAP_C_ -#include "jemalloc/internal/jemalloc_internal.h" - -/******************************************************************************/ -/* Function prototypes for non-inline static functions. */ - -static size_t bits2groups(size_t nbits); - -/******************************************************************************/ - -static size_t -bits2groups(size_t nbits) -{ - - return ((nbits >> LG_BITMAP_GROUP_NBITS) + - !!(nbits & BITMAP_GROUP_NBITS_MASK)); -} - -void -bitmap_info_init(bitmap_info_t *binfo, size_t nbits) -{ - unsigned i; - size_t group_count; - - assert(nbits > 0); - assert(nbits <= (ZU(1) << LG_BITMAP_MAXBITS)); - - /* - * Compute the number of groups necessary to store nbits bits, and - * progressively work upward through the levels until reaching a level - * that requires only one group. - */ - binfo->levels[0].group_offset = 0; - group_count = bits2groups(nbits); - for (i = 1; group_count > 1; i++) { - assert(i < BITMAP_MAX_LEVELS); - binfo->levels[i].group_offset = binfo->levels[i-1].group_offset - + group_count; - group_count = bits2groups(group_count); - } - binfo->levels[i].group_offset = binfo->levels[i-1].group_offset - + group_count; - binfo->nlevels = i; - binfo->nbits = nbits; -} - -size_t -bitmap_info_ngroups(const bitmap_info_t *binfo) -{ - - return (binfo->levels[binfo->nlevels].group_offset << LG_SIZEOF_BITMAP); -} - -size_t -bitmap_size(size_t nbits) -{ - bitmap_info_t binfo; - - bitmap_info_init(&binfo, nbits); - return (bitmap_info_ngroups(&binfo)); -} - -void -bitmap_init(bitmap_t *bitmap, const bitmap_info_t *binfo) -{ - size_t extra; - unsigned i; - - /* - * Bits are actually inverted with regard to the external bitmap - * interface, so the bitmap starts out with all 1 bits, except for - * trailing unused bits (if any). Note that each group uses bit 0 to - * correspond to the first logical bit in the group, so extra bits - * are the most significant bits of the last group. - */ - memset(bitmap, 0xffU, binfo->levels[binfo->nlevels].group_offset << - LG_SIZEOF_BITMAP); - extra = (BITMAP_GROUP_NBITS - (binfo->nbits & BITMAP_GROUP_NBITS_MASK)) - & BITMAP_GROUP_NBITS_MASK; - if (extra != 0) - bitmap[binfo->levels[1].group_offset - 1] >>= extra; - for (i = 1; i < binfo->nlevels; i++) { - size_t group_count = binfo->levels[i].group_offset - - binfo->levels[i-1].group_offset; - extra = (BITMAP_GROUP_NBITS - (group_count & - BITMAP_GROUP_NBITS_MASK)) & BITMAP_GROUP_NBITS_MASK; - if (extra != 0) - bitmap[binfo->levels[i+1].group_offset - 1] >>= extra; - } -} |