dtj dZddlmZddlZddlZddlmZddlmZej dkr ddl m Z m Z nddl m Z m Z d d d ddZddZddgZdS)znA minimal native lock over a caller-owned file descriptor, contending with :class:`FileLock` on the same file.) annotationsN)isfinite)Finalwin32)_lock_fd_nonblocking _unlock_fdTg?)blocking poll_intervalfdintr boolr floatreturnc|st|St|r|dkrd|}t|t|s#tj|t|#dS)a Take the native OS lock on *fd*, a file descriptor the caller opened and owns. This is the same one-byte exclusive lock :class:`FileLock` uses, so a descriptor lock and a path lock on the same file contend with each other. Unlike :class:`FileLock` it adds no path handling: it never opens, truncates, closes, unlinks, chmods, canonicalizes, or falls back. The caller owns *fd* before, during, and after the call, and must close it. On Windows *fd* must be a synchronous descriptor (its handle not opened with ``FILE_FLAG_OVERLAPPED``). For timeout, reentrancy, singleton, lifetime, or stale-break behavior, use :class:`FileLock`. There is no async wrapper. Run this in an executor, or drive ``blocking=False`` from your own polling loop. :param fd: an open file descriptor the caller owns. :param blocking: when ``True`` (default), retry the nonblocking attempt every *poll_interval* seconds until it succeeds; when ``False``, make one attempt. :param poll_interval: finite, positive seconds between attempts while blocking; ignored when *blocking* is ``False``. :returns: ``True`` once the lock is held, or ``False`` on contention when ``blocking`` is ``False``. :raises OSError: for a permanent native failure, such as an invalid descriptor, or with ``errno.ENOSYS`` when the Python build lacks the native locking primitive. The descriptor is left open. :raises ValueError: if a blocking call receives a non-finite or non-positive *poll_interval*. .. versionadded:: 3.30.0 rz5poll_interval must be finite and greater than 0, got T)rr ValueErrortimesleep)r r r msgs R/var/www/html/CA-Chatbot/venv/lib/python3.11/site-packages/filelock/_descriptor.pylock_descriptorrs6 (#B''' M " "mq&8&8aR_aaoo"2&&" =!!!#2&&" 4Nonec$t|dS)a Release the native OS lock on *fd* without touching the descriptor. :param fd: the descriptor a prior :func:`lock_descriptor` locked; the caller still owns and must close it. :raises OSError: if the native unlock fails, including ``errno.ENOSYS`` when the Python build lacks the native locking primitive; the caller may retry on the same descriptor. .. versionadded:: 3.30.0 N)r )r s runlock_descriptorr5srNNNNNrrr)r r r rr rrr)r r rr)__doc__ __future__rsysrmathrtypingrplatform_windowsrr _unixrr__all__rrr&stt"""""" <7:::::::::7777777726d""""""J      r