Method Resize

cpp/src/arrow/memory_pool.cc:940–961

  }

  Status Resize(const int64_t new_size, bool shrink_to_fit = true) override {
    if (ARROW_PREDICT_FALSE(new_size < 0)) {
      return Status::Invalid("Negative buffer resize: ", new_size);
    }
    uint8_t* ptr = mutable_data();
    if (ptr && shrink_to_fit && new_size <= size_) {
      // Buffer is non-null and is not growing, so shrink to the requested size without
      // excess space.
      ARROW_ASSIGN_OR_RAISE(int64_t new_capacity, RoundCapacity(new_size));
      if (capacity_ != new_capacity) {
        // Buffer hasn't got yet the requested size.
        RETURN_NOT_OK(pool_->Reallocate(capacity_, new_capacity, alignment_, &ptr));
        data_ = ptr;
        capacity_ = new_capacity;
      }
    } else {
      RETURN_NOT_OK(Reserve(new_size));
    }
    size_ = new_size;

    return Status::OK();
  }

  static std::shared_ptr<PoolBuffer> MakeShared(MemoryPool* pool, int64_t alignment) {
    std::shared_ptr<MemoryManager> mm;