portalocker.py 文件源码

def unlock(file):
        hfile = win32file._get_osfhandle(file.fileno())
        try:
            win32file.UnlockFileEx(hfile, 0, nNumberOfBytesToLockHigh, __overlapped)
        except pywintypes.error as exc_value:
            if exc_value.winerror == 158:
                # error: (158, 'UnlockFileEx', 'The segment is already unlocked.')
                # To match the 'posix' implementation, silently ignore this error
                pass
            else:
                # Q:  Are there exceptions/codes we should be dealing with here?
                raise