Method Create

cpp/src/arrow/io/file.cc:617–623

MemoryMappedFile::~MemoryMappedFile() { internal::CloseFromDestructor(this); }

Result<std::shared_ptr<MemoryMappedFile>> MemoryMappedFile::Create(
    const std::string& path, int64_t size) {
  ARROW_ASSIGN_OR_RAISE(auto file, FileOutputStream::Open(path));
  RETURN_NOT_OK(::arrow::internal::FileTruncate(file->file_descriptor(), size));
  RETURN_NOT_OK(file->Close());
  return MemoryMappedFile::Open(path, FileMode::READWRITE);
}

Result<std::shared_ptr<MemoryMappedFile>> MemoryMappedFile::Open(const std::string& path,
                                                                 FileMode::type mode) {