Method __do_deallocate

system/lib/libcxx/src/memory_resource.cpp:179–198

}

void unsynchronized_pool_resource::__adhoc_pool::__do_deallocate(
    memory_resource* upstream, void* p, size_t bytes, size_t align) {
  _LIBCPP_ASSERT_NON_NULL(__first_ != nullptr, "deallocating a block that was not allocated with this allocator");
  if (__first_->__start_ == p) {
    __chunk_footer* next = __first_->__next_;
    upstream->deallocate(p, __first_->__allocation_size(), __first_->__align_);
    __first_ = next;
  } else {
    for (__chunk_footer* h = __first_; h->__next_ != nullptr; h = h->__next_) {
      if (h->__next_->__start_ == p) {
        __chunk_footer* next = h->__next_->__next_;
        upstream->deallocate(p, h->__next_->__allocation_size(), h->__next_->__align_);
        h->__next_ = next;
        return;
      }
    }
    // The request to deallocate memory ends up being a no-op, likely resulting in a memory leak.
    _LIBCPP_ASSERT_VALID_DEALLOCATION(false, "deallocating a block that was not allocated with this allocator");
  }
}

class unsynchronized_pool_resource::__fixed_pool {
  struct __chunk_footer {