02-11-2002
Computer operating systems communicate with, and manage, registers in the underlying silicon hardware. Therefore, with currrent state-of-the-art technology, only one operating system may communiate with the underlying hardware (at a time).
This means that you can run either one OS or another, not both. The exception is with emulation applications, but in this application, you are not really running two operating systems, you are running one and emulating the other on top of one.
There are no robust emulations of Windows 2000 on any UNIX variant and there are no robust emulations of UNIX on W2K.
Apple has successfully emulated the Mac OS 9 OS on top of UNIX (Darwin, in MAC OS X). If you want the best of both worlds operating at the same time, then MAC OS X is a good (and more expensive!) choice.
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LEARN ABOUT CENTOS
xtappaddinput
XtAppAddInput(3) XT FUNCTIONS XtAppAddInput(3)
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(3),XtAppAddSignal(3)
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);
X Version 11 libXt 1.1.4 XtAppAddInput(3)