Function mi_bitmap_is_claimedx

3rd/mimalloc-2.0.9/src/bitmap.c:165–173

Returns `true` if all `count` bits were 1. `any_ones` is `true` if there was at least one bit set to one.

// Returns `true` if all `count` bits were 1. `any_ones` is `true` if there was at least one bit set to one.
static bool mi_bitmap_is_claimedx(mi_bitmap_t bitmap, size_t bitmap_fields, size_t count, mi_bitmap_index_t bitmap_idx, bool* any_ones) {
  const size_t idx = mi_bitmap_index_field(bitmap_idx);
  const size_t bitidx = mi_bitmap_index_bit_in_field(bitmap_idx);
  const size_t mask = mi_bitmap_mask_(count, bitidx);
  mi_assert_internal(bitmap_fields > idx); MI_UNUSED(bitmap_fields);
  size_t field = mi_atomic_load_relaxed(&bitmap[idx]);
  if (any_ones != NULL) *any_ones = ((field & mask) != 0);
  return ((field & mask) == mask);
}

bool _mi_bitmap_is_claimed(mi_bitmap_t bitmap, size_t bitmap_fields, size_t count, mi_bitmap_index_t bitmap_idx) {
  return mi_bitmap_is_claimedx(bitmap, bitmap_fields, count, bitmap_idx, NULL);