Method _undo_acquire

src/filelock/_api.py:1361–1365

Roll back the counter after a failed acquire, dropping the registry entry once nothing holds the path.

(self)

            self._context.lock_file_fd_identity = None

    def _undo_acquire(self) -> None:
        """Roll back the counter after a failed acquire, dropping the registry entry once nothing holds the path."""
        self._context.lock_counter = max(0, self._context.lock_counter - 1)
        if self._context.lock_counter == 0:
            self._drop_registry_entry()

    def _commit_acquire(self, canonical: str) -> None:
        """Record this instance as the holder once the first acquire succeeds, so peers can detect the deadlock."""