Function mi_thread_local_claim

system/lib/mimalloc/src/threadlocal.c:174–184

When we claim a free slot, we increase the global version counter (so if we reuse a slot it will be returning NULL initially when a thread tries to get it)

// When we claim a free slot, we increase the global version counter 
// (so if we reuse a slot it will be returning NULL initially when a thread tries to get it)
static mi_thread_local_t mi_thread_local_claim(void) {
  size_t idx = 0;
  if (mi_thread_locals_free != NULL && mi_bitmap_try_find_and_claim(mi_thread_locals_free,0,&idx,&mi_thread_local_claim_fun,NULL)) {
    mi_thread_locals_version++;
    if (mi_thread_locals_version == SIZE_MAX/2) { mi_thread_locals_version = 1; }
    return mi_key_create( idx, mi_thread_locals_version);
  }
  else {
    return 0;
  }
}

static bool mi_thread_local_create_expand(void) {
  mi_bitmap_t* slots = mi_thread_locals_free;