Function mi_abandoned_push

3rd/mimalloc-2.0.9/src/segment.c:1155–1167

Push on the abandoned list.

// Push on the abandoned list.
static void mi_abandoned_push(mi_segment_t* segment) {
  mi_assert_internal(segment->thread_id == 0);
  mi_assert_internal(mi_atomic_load_ptr_relaxed(mi_segment_t, &segment->abandoned_next) == NULL);
  mi_assert_internal(segment->next == NULL);
  mi_assert_internal(segment->used > 0);
  mi_tagged_segment_t next;
  mi_tagged_segment_t ts = mi_atomic_load_relaxed(&abandoned);
  do {
    mi_atomic_store_ptr_release(mi_segment_t, &segment->abandoned_next, mi_tagged_segment_ptr(ts));
    next = mi_tagged_segment(segment, ts);
  } while (!mi_atomic_cas_weak_release(&abandoned, &ts, next));
  mi_atomic_increment_relaxed(&abandoned_count);
}

// Wait until there are no more pending reads on segments that used to be in the abandoned list
// called for example from `arena.c` before decommitting