XtAppAddInput(3Xt)						   XT FUNCTIONS 						XtAppAddInput(3Xt)

NAME

       XtAppAddInput, XtRemoveInput - register and remove an input source

SYNTAX

       XtInputId XtAppAddInput(XtAppContext app_context, int source, XtPointer condition, XtInputCallbackProc proc, XtPointer client_data);

       void XtRemoveInput(XtInputId id);

ARGUMENTS

       app_context
		 Specifies the application context that identifies the application.

       client_data
		 Specifies the argument that is to be passed to the specified procedure when input is available.

       condition Specifies the mask that indicates a read, write, or exception condition or some operating system dependent condition.

       id	 Specifies the ID returned from the corresponding XtAppAddInput call.

       proc	 Specifies the procedure that is to be called when input is available.

       source	 Specifies the source file descriptor on a UNIX-based system or other operating system dependent device specification.

DESCRIPTION

       The XtAppAddInput function registers with the Intrinsics read routine a new source of events, which is usually file input but can also be
       file output.  Note that file should be loosely interpreted to mean any sink or source of data.  XtAppAddInput also specifies the conditions
       under which the source can generate events.  When input is pending on this source, the callback procedure is called.

       The legal values for the condition argument are operating-system dependent.  On a UNIX-based system, the condition is some union of XtInpu-
       tReadMask, XtInputWriteMask, and XtInputExceptMask.  The XtRemoveInput function causes the Intrinsics read routine to stop watching for
       input from the input source.

SEE ALSO

       XtAppAddTimeOut(3Xt),XtAppAddSignal(3Xt)
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface

BUGS

       In ANSI C it is necessary to cast the condition to an XtPointer, e.g.:
	   XtAppAddInput(app_context,
	       source,
	       (XtPointer) (XtInputReadMask | XtInputWriteMask),
	       proc,
	       client_data);

XFree86 							   Version 4.7.0						XtAppAddInput(3Xt)