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fix bit search index

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This commit is contained in:
daan 2019-07-15 14:33:15 -07:00
parent 08e0f14c2a
commit 89bdcd43b2
1 changed files with 2 additions and 1 deletions
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src/memory.c
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@ -164,13 +164,14 @@ static bool mi_region_alloc_blocks(mem_region_t* region, size_t idx, size_t bloc
const uintptr_t mask = mi_region_block_mask(blocks,0); const uintptr_t mask = mi_region_block_mask(blocks,0);
const size_t bitidx_max = MI_REGION_MAP_BITS - blocks; const size_t bitidx_max = MI_REGION_MAP_BITS - blocks;
size_t bitidx = 0; size_t bitidx ;
uintptr_t map; uintptr_t map;
uintptr_t newmap; uintptr_t newmap;
do { // while no atomic claim success and not all bits seen do { // while no atomic claim success and not all bits seen
// find the first free range of bits // find the first free range of bits
map = mi_atomic_read(&region->map); map = mi_atomic_read(&region->map);
size_t m = map; size_t m = map;
bitidx = 0;
do { do {
// skip ones // skip ones
while ((m&1) == 1) { bitidx++; m>>=1; } while ((m&1) == 1) { bitidx++; m>>=1; }