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/*
* Copyright 1985, 1987, 1998 The Open Group
*
* 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.
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of The Open Group shall not be
* used in advertising or otherwise to promote the sale, use or other dealings
* in this Software without prior written authorization from The Open Group.
*/
/* $XFree86 */
/*
* Copyright 2002-2003 Red Hat Inc., Durham, North Carolina.
*
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation on the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/** \file
* This file provides a #XCheckNotMaskEvent function that is derived
* from the standard Xlib XCheckMaskEvent function. */
#ifdef HAVE_DMX_CONFIG_H
#include <dmx-config.h>
#endif
#include "dmx.h"
#include "ChkNotMaskEv.h"
extern long const _Xevent_to_mask[];
/** Check existing events in queue to find if any match. If so, return.
* If not, flush buffer and see if any more events are readable. If one
* matches, return. If all else fails, tell the user no events found.
*/
Bool
XCheckNotMaskEvent(Display * dpy, long mask, XEvent * event)
{
register _XQEvent *prev, *qelt;
unsigned long qe_serial = 0;
int n; /* time through count */
LockDisplay(dpy);
prev = NULL;
for (n = 3; --n >= 0;) {
for (qelt = prev ? prev->next : dpy->head;
qelt; prev = qelt, qelt = qelt->next) {
if (qelt->event.type >= LASTEvent
|| !(_Xevent_to_mask[qelt->event.type] & mask)) {
*event = qelt->event;
_XDeq(dpy, prev, qelt);
UnlockDisplay(dpy);
return True;
}
}
if (prev)
qe_serial = prev->qserial_num;
switch (n) {
case 2:
_XEventsQueued(dpy, QueuedAfterReading);
break;
case 1:
_XFlush(dpy);
break;
}
if (prev && prev->qserial_num != qe_serial)
/* another thread has snatched this event */
prev = NULL;
}
UnlockDisplay(dpy);
return False;
}
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