Function mi_abandoned_pop

3rd/mimalloc-2.0.9/src/segment.c:1180–1189

Pop from the abandoned list

// Pop from the abandoned list
static mi_segment_t* mi_abandoned_pop(void) {
  mi_segment_t* segment;
  // Check efficiently if it is empty (or if the visited list needs to be moved)
  mi_tagged_segment_t ts = mi_atomic_load_relaxed(&abandoned);
  segment = mi_tagged_segment_ptr(ts);
  if mi_likely(segment == NULL) {
    if mi_likely(!mi_abandoned_visited_revisit()) { // try to swap in the visited list on NULL
      return NULL;
    }
  }

  // Do a pop. We use a reader count to prevent
  // a segment to be decommitted while a read is still pending,