From d1e8cd61e0fa02a5b415a5c161b355c95f45ae14 Mon Sep 17 00:00:00 2001 From: marha Date: Thu, 8 Jul 2010 06:58:33 +0000 Subject: git update 8/7/2010 --- libX11/src/ChkIfEv.c | 167 +++++++++++++++++++++++++-------------------------- 1 file changed, 83 insertions(+), 84 deletions(-) (limited to 'libX11/src/ChkIfEv.c') diff --git a/libX11/src/ChkIfEv.c b/libX11/src/ChkIfEv.c index 5c1dd2b9b..12065638d 100644 --- a/libX11/src/ChkIfEv.c +++ b/libX11/src/ChkIfEv.c @@ -1,84 +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. - -*/ - -#define NEED_EVENTS -#ifdef HAVE_CONFIG_H -#include -#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 +#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; +} -- cgit v1.2.3