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avoid mod operation in region allocation and limit extension

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This commit is contained in:
daan 2019-08-11 08:54:32 -07:00
parent 756f4b2724
commit a73daf1804
1 changed files with 4 additions and 3 deletions
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7
src/memory.c
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@ -261,13 +261,14 @@ void* _mi_mem_alloc_aligned(size_t size, size_t alignment, bool commit, size_t*
size_t count = mi_atomic_read(&regions_count);
size_t idx = mi_atomic_read(&region_next_idx);
for (size_t visited = 0; visited < count; visited++, idx++) {
if (!mi_region_try_alloc_blocks(idx%count, blocks, size, commit, &p, id, tld)) return NULL; // error
if (idx >= count) idx = 0; // wrap around
if (!mi_region_try_alloc_blocks(idx, blocks, size, commit, &p, id, tld)) return NULL; // error
if (p != NULL) break;
}
if (p == NULL) {
// no free range in existing regions -- try to extend beyond the count
for (idx = count; idx < MI_REGION_MAX; idx++) {
// no free range in existing regions -- try to extend beyond the count.. but at most 4 regions
for (idx = count; idx < count + 4 && idx < MI_REGION_MAX; idx++) {
if (!mi_region_try_alloc_blocks(idx, blocks, size, commit, &p, id, tld)) return NULL; // error
if (p != NULL) break;
}