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use relaxed load for last search position in an arena

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daan 2020-09-24 16:55:00 -07:00
parent 2822e5c1f3
commit b149099bf3
1 changed files with 2 additions and 2 deletions
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4
src/arena.c
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@ -103,9 +103,9 @@ static size_t mi_block_count_of_size(size_t size) {
----------------------------------------------------------- */
static bool mi_arena_alloc(mi_arena_t* arena, size_t blocks, mi_bitmap_index_t* bitmap_idx)
{
size_t idx = mi_atomic_load_acquire(&arena->search_idx); // start from last search
size_t idx = mi_atomic_load_relaxed(&arena->search_idx); // start from last search; ok to be relaxed as the exact start does not matter
if (_mi_bitmap_try_find_from_claim_across(arena->blocks_inuse, arena->field_count, idx, blocks, bitmap_idx)) {
mi_atomic_store_release(&arena->search_idx, idx); // start search from here next time
mi_atomic_store_relaxed(&arena->search_idx, idx); // start search from here next time
return true;
};
return false;