INNER CODE UNIT · Python

timeout

briscverse/ryp · ryp.py:1497

                    timeout=0.1) -> _cffi_backend._CDataBase:
    """
    A reimplementation of R's R_checkActivity() that avoids the longjmp in
    R_SelectEx(), which causes it to segfault when run on a background thread.
    Checks for activity on each of the file descriptors in R_InputHandlers,
    such as a plot being resized or closed. Not used on Windows.
    
    Args:
        select: a pointer to the select function in the C standard library
        timeout: the timeout in seconds, passed to the select() system call

    Returns:
        A mask of file descriptors that are waiting to be handled, or NULL if
        none are waiting.
    """
    NFDBITS = 8 * _ffi.sizeof('unsigned long')
    read_mask = _ffi.new('fd_set *')  # initialized to 0, so skip FD_ZERO()
    timeval = _ffi.new('struct timeval *')

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