fpFD_ISSET function

Declaration

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

• FpSelect
• FpFD_ZERO
• FpFD_Clr
• FpFD_Set