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