Method ~PoolBuffer

cpp/src/arrow/memory_pool.cc:909–920

      : ResizableBuffer(nullptr, 0, std::move(mm)), pool_(pool), alignment_(alignment) {}

  ~PoolBuffer() override {
    // Avoid calling pool_->Free if the global pools are destroyed
    // (XXX this will not work with user-defined pools)

    // This can happen if a Future is destructing on one thread while or
    // after memory pools are destructed on the main thread (as there is
    // no guarantee of destructor order between thread/memory pools)
    uint8_t* ptr = mutable_data();
    if (ptr && !global_state.is_finalizing()) {
      pool_->Free(ptr, capacity_, alignment_);
    }
  }

  Status Reserve(const int64_t capacity) override {
    if (capacity < 0) {