Method ReadAt

cpp/src/arrow/io/interfaces.cc:152–160

RandomAccessFile::RandomAccessFile() : interface_impl_(new Impl()) {}

Result<int64_t> RandomAccessFile::ReadAt(int64_t position, int64_t nbytes,
                                         bool allow_short_read, void* out) {
  ARROW_ASSIGN_OR_RAISE(auto real_nbytes, ReadAt(position, nbytes, out));
  if (!allow_short_read && real_nbytes != nbytes) {
    return Status::IOError("File too short: expected to be able to read ", nbytes,
                           " bytes, got ", real_nbytes);
  }
  return real_nbytes;
}

Result<int64_t> RandomAccessFile::ReadAt(int64_t position, int64_t nbytes, void* out) {
  std::lock_guard<std::mutex> lock(interface_impl_->lock_);