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XtAppAddInput(3Xt)
X11R6
NAME
  XtAppAddInput, XtRemoveInput - register and remove an input source

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

  void XtRemoveInput(id)
	  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 XtInputReadMask,
  XtInputWriteMask, and XtInputExceptMask. The XtRemoveInput function causes
  the Intrinsics read routine to stop watching for input from the input
  source.

BUGS
  In ANSI C it is necessary to cast the condition to an XtPointer, for
  example:

       XtAppAddInput(app_context,
       source,
       (XtPointer) (XtInputReadMask | XtInputWriteMask),
       proc,
       client_data);

SEE ALSO
  XtAppAddTimeOut(3Xt), XtAppAddSignal(3Xt)

  X Toolkit Intrinsics -- C Language Interface

  Xlib -- C Language X Interface

Index for Section 3Xt

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