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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
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