summaryrefslogtreecommitdiff
path: root/extra/jemalloc/src/bitmap.c
diff options
context:
space:
mode:
Diffstat (limited to 'extra/jemalloc/src/bitmap.c')
-rw-r--r--extra/jemalloc/src/bitmap.c90
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;
- }
-}