Method getOrCreateLockOnDir

java/com/facebook/soloader/SysUtil.java:443–459

(File soDirectory, File lockFileName)

  }

  public static @Nullable FileLocker getOrCreateLockOnDir(File soDirectory, File lockFileName)
      throws IOException {
    boolean notWritable = false;
    try {
      return getFileLocker(lockFileName);
    } catch (FileNotFoundException e) {
      notWritable = true;
      if (!soDirectory.setWritable(true)) {
        throw e;
      }
      return getFileLocker(lockFileName);
    } finally {
      if (notWritable && !soDirectory.setWritable(false)) {
        LogUtil.w(TAG, "error removing " + soDirectory.getCanonicalPath() + " write permission");
      }
    }
  }

  public static FileLocker getFileLocker(File lockFileName) throws IOException {
    return FileLocker.lock(lockFileName);