diff options
Diffstat (limited to 'nx-X11/lib/X11/ChkIfEv.c.NX.original')
| -rw-r--r-- | nx-X11/lib/X11/ChkIfEv.c.NX.original | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/nx-X11/lib/X11/ChkIfEv.c.NX.original b/nx-X11/lib/X11/ChkIfEv.c.NX.original new file mode 100644 index 000000000..0217af830 --- /dev/null +++ b/nx-X11/lib/X11/ChkIfEv.c.NX.original @@ -0,0 +1,138 @@ +/* $Xorg: ChkIfEv.c,v 1.4 2001/02/09 02:03:31 xorgcvs Exp $ */ +/* + +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. + +*/ +/* $XFree86$ */ + +#define NEED_EVENTS +#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 (dpy, event, predicate, arg) + register Display *dpy; + Bool (*predicate)( + Display* /* display */, + XEvent* /* event */, + char* /* arg */ + ); /* function to call */ + register XEvent *event; /* XEvent to be filled in. */ + 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); + 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; +} + +#ifdef NX_TRANS_SOCKET + +/* + * This is just like XCheckIfEvent() but doesn't + * flush the output buffer if it can't read new + * events. + */ + +Bool XCheckIfEventNoFlush (dpy, event, predicate, arg) + register Display *dpy; + Bool (*predicate)( + Display* /* display */, + XEvent* /* event */, + char* /* arg */ + ); /* function to call */ + register XEvent *event; /* XEvent to be filled in. */ + char *arg; +{ + register _XQEvent *prev, *qelt; + unsigned long qe_serial = 0; + int n; /* time through count */ + + LockDisplay(dpy); + prev = NULL; + for (n = 2; --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); + UnlockDisplay(dpy); + return True; + } + } + if (prev) + qe_serial = prev->qserial_num; + switch (n) { + case 1: + _XEventsQueued(dpy, QueuedAfterReading); + break; + } + if (prev && prev->qserial_num != qe_serial) + /* another thread has snatched this event */ + prev = NULL; + } + UnlockDisplay(dpy); + return False; +} + +#endif |