Function ddio_DeleteLockFile

ddio/file.cpp:105–141

}

bool ddio_DeleteLockFile(const std::filesystem::path& dir) {
  int32_t curr_pid = ddio_GetPID();

  std::filesystem::path lock_filename = dir / ".lock";
  if (!std::filesystem::exists(lock_filename)) {
    return true;
  }

  LockFileContent lock_content;
  try {
    std::ifstream lockfile(lock_filename, std::ios::binary);
    lockfile >> lock_content;
    lockfile.close();
  } catch (std::exception &e) {
    return false;
  }

  if (lock_content.tag != LOCK_TAG) {
    return false;
  }

  ASSERT(lock_content.pid != -1);

  // check the file id in the file, compared to our pid
  if (lock_content.pid != curr_pid) {
    // it doesn't belong to
    return false;
  }

  std::error_code ec;
  // the lock file in the directory belongs to us!
  if (!std::filesystem::remove(lock_filename, ec)) {
    return false;
  }

  return true;
}