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 |