Function _lock_exclusive

scripts/file_lock.py:40–45

获取排他锁（写锁）。

(fd: int)

def _lock_exclusive(fd: int) -> None:
    """获取排他锁（写锁）。"""
    if _IS_WINDOWS:
        msvcrt.locking(fd, msvcrt.LK_LOCK, 1)
    else:
        fcntl.flock(fd, fcntl.LOCK_EX)


def _unlock(fd: int) -> None: