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/*
* Copyright 1990, 1991 by the Massachusetts Institute of Technology and
* UniSoft Group Limited.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the names of MIT and UniSoft not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. MIT and UniSoft
* make no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* $XConsortium$
*/
#include "Xlib.h"
#include "Xutil.h"
#include "Xatom.h"
#include "xtest.h"
#include "xtestlib.h"
#include "pixval.h"
/*
* Get the current server time. Use a property attached to the root window
* of the display called XT_TIMESTAMP and replaces it with 42 (32-bits).
* The PropertyNotify event that's generated supplies the time stamp returned.
* The event mask on the root window is restored to its initial state.
* Returns CurrentTime on error (as well as deleting the test).
*/
Time
gettime(disp)
Display *disp;
{
Window root;
static Atom prop = None;
static int data = 42;
static char *name = XT_TIMESTAMP;
XWindowAttributes wattr;
XEvent ev;
int i;
root = XDefaultRootWindow(disp);
if (XGetWindowAttributes(disp, root, &wattr) == False) {
delete("gettime: XGetWindowAttributes on root failed.");
return CurrentTime;
}
if (prop==None && (prop=XInternAtom(disp, name, False)) == None) {
delete("gettime: XInternAtom of '%s' failed.", name);
return CurrentTime;
}
XSelectInput(disp, root, wattr.your_event_mask | PropertyChangeMask);
XChangeProperty(disp, root, prop, XA_INTEGER, 32, PropModeReplace,
(unsigned char *)&data, 1);
for (i=0; i<10; i++, sleep(2)) {
if (XCheckWindowEvent(disp, root, PropertyChangeMask, &ev))
break;
}
if (i >= 10) {
delete("gettime: Didn't receive expected PropertyNotify event");
return CurrentTime;
}
XSelectInput(disp, root, wattr.your_event_mask);
return ev.xproperty.time;
}
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