Technical Reference: Base Operating System and Extensions, Volume 2

nodelay Subroutine

Purpose

Enables or disables block during read.

Library

Curses Library (libcurses.a)

Syntax

#include <curses.h>

int nodelay(WINDOW *win,
bool bf);

Description

The nodelay subroutine specifies whether Delay Mode or No Delay Mode is in effect for the screen associated with the specified window. If bf is TRUE, this screen is set to No Delay Mode. If bf is FALSE, this screen is set to Delay Mode. The initial state is FALSE.

Parameters

bf
*win

Return Values

Upon successful completion, the nodelay subroutine returns OK. Otherwise, it returns ERR.

Examples

To cause the wgetch subroutine to return an error message, if no input is ready in the user-defined window my_window, use:
```
nodelay(my_window, TRUE);
```
To allow for a delay when retrieving a character in the user-defined window my_window, use:
```
WINDOW *my_window;
nodelay(my_window, FALSE);
```

Related Information

The halfdelay (halfdelay Subroutine) subroutine, wgetch (getch, mvgetch, mvwgetch, or wgetch Subroutine) subroutine.

Curses Overview for Programming, List of Curses Subroutines, Manipulating Characters with Curses in AIX 5L Version 5.2 General Programming Concepts: Writing and Debugging Programs