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