Method Reallocate

cpp/src/arrow/stl_allocator.h:127–139

  }

  Status Reallocate(int64_t old_size, int64_t new_size, int64_t /*alignment*/,
                    uint8_t** ptr) override {
    uint8_t* old_ptr = *ptr;
    try {
      *ptr = alloc_.allocate(new_size);
    } catch (std::bad_alloc& e) {
      return Status::OutOfMemory(e.what());
    }
    memcpy(*ptr, old_ptr, std::min(old_size, new_size));
    alloc_.deallocate(old_ptr, old_size);
    stats_.DidReallocateBytes(old_size, new_size);
    return Status::OK();
  }

  void Free(uint8_t* buffer, int64_t size, int64_t /*alignment*/) override {
    alloc_.deallocate(buffer, size);