diff options
Diffstat (limited to 'libX11/src/PeekIfEv.c')
| -rw-r--r-- | libX11/src/PeekIfEv.c | 156 |
1 files changed, 78 insertions, 78 deletions
diff --git a/libX11/src/PeekIfEv.c b/libX11/src/PeekIfEv.c index c60995824..207cd1191 100644 --- a/libX11/src/PeekIfEv.c +++ b/libX11/src/PeekIfEv.c @@ -1,78 +1,78 @@ -/*
-
-Copyright 1986, 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"
-
-/*
- * return the next event in the queue that satisfies the predicate.
- * BUT do not remove it from the queue.
- * If none found, flush, and then wait until one satisfies the predicate.
- */
-
-int
-XPeekIfEvent (
- register Display *dpy,
- register XEvent *event,
- Bool (*predicate)(
- Display* /* display */,
- XEvent* /* event */,
- char* /* arg */
- ),
- char *arg)
-{
- register _XQEvent *prev, *qelt;
- unsigned long qe_serial = 0;
-
- LockDisplay(dpy);
- prev = NULL;
- while (1) {
- for (qelt = prev ? prev->next : dpy->head;
- qelt;
- prev = qelt, qelt = qelt->next) {
- if(qelt->qserial_num > qe_serial
- && (*predicate)(dpy, &qelt->event, arg)) {
- XEvent copy;
- *event = qelt->event;
- if (_XCopyEventCookie(dpy, &event->xcookie, ©.xcookie)) {
- _XStoreEventCookie(dpy, ©);
- *event = copy;
- }
- UnlockDisplay(dpy);
- return 0;
- }
- }
- if (prev)
- qe_serial = prev->qserial_num;
- _XReadEvents(dpy);
- if (prev && prev->qserial_num != qe_serial)
- /* another thread has snatched this event */
- prev = NULL;
- }
-}
-
+/* + +Copyright 1986, 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" + +/* + * return the next event in the queue that satisfies the predicate. + * BUT do not remove it from the queue. + * If none found, flush, and then wait until one satisfies the predicate. + */ + +int +XPeekIfEvent ( + register Display *dpy, + register XEvent *event, + Bool (*predicate)( + Display* /* display */, + XEvent* /* event */, + char* /* arg */ + ), + char *arg) +{ + register _XQEvent *prev, *qelt; + unsigned long qe_serial = 0; + + LockDisplay(dpy); + prev = NULL; + while (1) { + for (qelt = prev ? prev->next : dpy->head; + qelt; + prev = qelt, qelt = qelt->next) { + if(qelt->qserial_num > qe_serial + && (*predicate)(dpy, &qelt->event, arg)) { + XEvent copy; + *event = qelt->event; + if (_XCopyEventCookie(dpy, &event->xcookie, ©.xcookie)) { + _XStoreEventCookie(dpy, ©); + *event = copy; + } + UnlockDisplay(dpy); + return 0; + } + } + if (prev) + qe_serial = prev->qserial_num; + _XReadEvents(dpy); + if (prev && prev->qserial_num != qe_serial) + /* another thread has snatched this event */ + prev = NULL; + } +} + |