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    fpFD_ISSET

    Check whether a file descriptor is set.

    Declaration

    Source position: bunxovlh.inc line 75

    function fpFD_ISSET(fdno: cint; const nset: TFDSet) : cint;

    Description

    FpFD_Set Checks whether file descriptor fdNo in file descriptor set fds is set. It returns zero if the descriptor is not set, 1 if it is set. If the number of the file descriptor it wrong, -1 is returned.

    For an example, see FpSelect.

    Errors

    If an invalid file descriptor number is passed, -1 is returned.

    See also

    Name Description
    FpSelect Wait for events on file descriptors.
    FpFD_ZERO Clear all file descriptors in set.
    FpFD_Clr Clears a file descriptor in a set.
    FpFD_Set Set a file descriptor in a set.