diff options
Diffstat (limited to 'libX11/src/ChkIfEv.c')
| -rw-r--r-- | libX11/src/ChkIfEv.c | 166 |
1 files changed, 83 insertions, 83 deletions
diff --git a/libX11/src/ChkIfEv.c b/libX11/src/ChkIfEv.c index 12065638d..876a850e6 100644 --- a/libX11/src/ChkIfEv.c +++ b/libX11/src/ChkIfEv.c @@ -1,83 +1,83 @@ -/*
-
-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.
-
-*/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include "Xlibint.h"
-
-/*
- * 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 XCheckIfEvent (
- register Display *dpy,
- register XEvent *event, /* XEvent to be filled in. */
- Bool (*predicate)(
- Display* /* display */,
- XEvent* /* event */,
- char* /* arg */
- ), /* function to call */
- char *arg)
-{
- 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->qserial_num > qe_serial
- && (*predicate)(dpy, &qelt->event, arg)) {
- *event = qelt->event;
- _XDeq(dpy, prev, qelt);
- _XStoreEventCookie(dpy, event);
- 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;
-}
+/* + +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. + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include "Xlibint.h" + +/* + * 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 XCheckIfEvent ( + register Display *dpy, + register XEvent *event, /* XEvent to be filled in. */ + Bool (*predicate)( + Display* /* display */, + XEvent* /* event */, + char* /* arg */ + ), /* function to call */ + char *arg) +{ + 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->qserial_num > qe_serial + && (*predicate)(dpy, &qelt->event, arg)) { + *event = qelt->event; + _XDeq(dpy, prev, qelt); + _XStoreEventCookie(dpy, event); + 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; +} |