Bug Summary

File:Display.c
Location:line 621, column 19
Description:Access to field 'next' results in a dereference of a null pointer (loaded from variable 'pd')

Annotated Source Code

1/***********************************************************
2Copyright (c) 1993, Oracle and/or its affiliates. All rights reserved.
3
4Permission is hereby granted, free of charge, to any person obtaining a
5copy of this software and associated documentation files (the "Software"),
6to deal in the Software without restriction, including without limitation
7the rights to use, copy, modify, merge, publish, distribute, sublicense,
8and/or sell copies of the Software, and to permit persons to whom the
9Software is furnished to do so, subject to the following conditions:
10
11The above copyright notice and this permission notice (including the next
12paragraph) shall be included in all copies or substantial portions of the
13Software.
14
15THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21DEALINGS IN THE SOFTWARE.
22
23Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.
24
25 All Rights Reserved
26
27Permission to use, copy, modify, and distribute this software and its
28documentation for any purpose and without fee is hereby granted,
29provided that the above copyright notice appear in all copies and that
30both that copyright notice and this permission notice appear in
31supporting documentation, and that the name of Digital not be
32used in advertising or publicity pertaining to distribution of the
33software without specific, written prior permission.
34
35DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
36ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
37DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
38ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
39WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
40ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
41SOFTWARE.
42
43******************************************************************/
44
45/*
46
47Copyright 1987, 1988, 1998 The Open Group
48
49Permission to use, copy, modify, distribute, and sell this software and its
50documentation for any purpose is hereby granted without fee, provided that
51the above copyright notice appear in all copies and that both that
52copyright notice and this permission notice appear in supporting
53documentation.
54
55The above copyright notice and this permission notice shall be included in
56all copies or substantial portions of the Software.
57
58THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
59IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
60FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
61OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
62AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
63CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
64
65Except as contained in this notice, the name of The Open Group shall not be
66used in advertising or otherwise to promote the sale, use or other dealings
67in this Software without prior written authorization from The Open Group.
68
69*/
70
71#ifdef HAVE_CONFIG_H1
72#include <config.h>
73#endif
74#include "IntrinsicI.h"
75#ifndef X_NO_RESOURCE_CONFIGURATION_MANAGEMENT
76#include "ResConfigP.h"
77#endif
78
79#include <stdlib.h>
80
81#ifdef XTHREADS1
82void (*_XtProcessLock)(void) = NULL((void*)0);
83void (*_XtProcessUnlock)(void) = NULL((void*)0);
84void (*_XtInitAppLock)(XtAppContext) = NULL((void*)0);
85#endif
86
87static String XtNnoPerDisplay = "noPerDisplay";
88
89ProcessContext _XtGetProcessContext(void)
90{
91 static ProcessContextRec processContextRec = {
92 (XtAppContext)NULL((void*)0),
93 (XtAppContext)NULL((void*)0),
94 (ConverterTable)NULL((void*)0),
95 {(XtLanguageProc)NULL((void*)0), (XtPointer)NULL((void*)0)}
96 };
97
98 return &processContextRec;
99}
100
101
102XtAppContext _XtDefaultAppContext(void)
103{
104 ProcessContext process = _XtGetProcessContext();
105 XtAppContext app;
106
107 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
108 if (process->defaultAppContext == NULL((void*)0)) {
109 process->defaultAppContext = XtCreateApplicationContext();
110 }
111 app = process->defaultAppContext;
112 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
113 return app;
114}
115
116static void AddToAppContext(
117 Display *d,
118 XtAppContext app)
119{
120#define DISPLAYS_TO_ADD 4
121
122 if (app->count >= app->max) {
123 app->max += DISPLAYS_TO_ADD;
124 app->list = (Display **) XtRealloc((char *)app->list,
125 (unsigned) app->max * sizeof(Display *));
126 }
127
128 app->list[app->count++] = d;
129 app->rebuild_fdlist = TRUE1;
130#ifndef USE_POLL1
131 if (ConnectionNumber(d)(((_XPrivDisplay)d)->fd) + 1 > app->fds.nfds) {
132 app->fds.nfds = ConnectionNumber(d)(((_XPrivDisplay)d)->fd) + 1;
133 }
134#else
135 app->fds.nfds++;
136#endif
137#undef DISPLAYS_TO_ADD
138}
139
140static void XtDeleteFromAppContext(
141 Display *d,
142 register XtAppContext app)
143{
144 register int i;
145
146 for (i = 0; i < app->count; i++) if (app->list[i] == d) break;
147
148 if (i < app->count) {
149 if (i <= app->last && app->last > 0) app->last--;
150 for (i++; i < app->count; i++) app->list[i-1] = app->list[i];
151 app->count--;
152 }
153 app->rebuild_fdlist = TRUE1;
154#ifndef USE_POLL1
155 if ((ConnectionNumber(d)(((_XPrivDisplay)d)->fd) + 1) == app->fds.nfds)
156 app->fds.nfds--;
157 else /* Unnecessary, just to be fool-proof */
158 FD_CLR(ConnectionNumber(d), &app->fds.rmask)((void) (((&app->fds.rmask)->__fds_bits)[(((((_XPrivDisplay
)d)->fd)) / (8 * (int) sizeof (__fd_mask)))] &= ~((__fd_mask
) 1 << (((((_XPrivDisplay)d)->fd)) % (8 * (int) sizeof
(__fd_mask))))));
159#else
160 app->fds.nfds--;
161#endif
162}
163
164static XtPerDisplay NewPerDisplay(
165 Display *dpy)
166{
167 PerDisplayTablePtr pd;
168
169 pd = XtNew(PerDisplayTable)((PerDisplayTable *) XtMalloc((unsigned) sizeof(PerDisplayTable
)));
170 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
171 pd->dpy = dpy;
172 pd->next = _XtperDisplayList;
173 _XtperDisplayList = pd;
174 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
175 return &(pd->perDpy);
176}
177
178static XtPerDisplay InitPerDisplay(
179 Display *dpy,
180 XtAppContext app,
181 _Xconstconst char * name,
182 _Xconstconst char * classname)
183{
184 XtPerDisplay pd;
185
186 AddToAppContext(dpy, app);
187
188 pd = NewPerDisplay(dpy);
189 _XtHeapInit(&pd->heap);
190 pd->destroy_callbacks = NULL((void*)0);
191 pd->region = XCreateRegion();
192 pd->case_cvt = NULL((void*)0);
193 pd->defaultKeycodeTranslator = XtTranslateKey;
194 pd->keysyms_serial = 0;
195 pd->keysyms = NULL((void*)0);
196 XDisplayKeycodes(dpy, &pd->min_keycode, &pd->max_keycode);
197 pd->modKeysyms = NULL((void*)0);
198 pd->modsToKeysyms = NULL((void*)0);
199 pd->appContext = app;
200 pd->name = XrmStringToName(name)XrmStringToQuark(name);
201 pd->class = XrmStringToClass(classname)XrmStringToQuark(classname);
202 pd->being_destroyed = False0;
203 pd->GClist = NULL((void*)0);
204 pd->pixmap_tab = NULL((void*)0);
205 pd->language = NULL((void*)0);
206 pd->rv = False0;
207 pd->last_event.xany.serial = 0;
208 pd->last_timestamp = 0;
209 _XtAllocTMContext(pd);
210 pd->mapping_callbacks = NULL((void*)0);
211
212 pd->pdi.grabList = NULL((void*)0);
213 pd->pdi.trace = NULL((void*)0);
214 pd->pdi.traceDepth = 0;
215 pd->pdi.traceMax = 0;
216 pd->pdi.focusWidget = NULL((void*)0);
217 pd->pdi.activatingKey = 0;
218 pd->pdi.keyboard.grabType = XtNoServerGrab;
219 pd->pdi.pointer.grabType = XtNoServerGrab;
220 _XtAllocWWTable(pd);
221 pd->per_screen_db = (XrmDatabase *)__XtCalloc(ScreenCount(dpy)(((_XPrivDisplay)dpy)->nscreens),
222 sizeof(XrmDatabase));
223 pd->cmd_db = (XrmDatabase)NULL((void*)0);
224 pd->server_db = (XrmDatabase)NULL((void*)0);
225 pd->dispatcher_list = NULL((void*)0);
226 pd->ext_select_list = NULL((void*)0);
227 pd->ext_select_count = 0;
228 pd->hook_object = NULL((void*)0);
229#if 0
230 pd->hook_object = _XtCreate("hooks", "Hooks", hookObjectClass,
231 (Widget)NULL((void*)0), (Screen*)DefaultScreenOfDisplay(dpy)(&((_XPrivDisplay)dpy)->screens[(((_XPrivDisplay)dpy)->
default_screen)]),
232 (ArgList)NULL((void*)0), 0, (XtTypedArgList)NULL((void*)0), 0,
233 (ConstraintWidgetClass)NULL((void*)0));
234#endif
235
236#ifndef X_NO_RESOURCE_CONFIGURATION_MANAGEMENT
237 pd->rcm_init = XInternAtom (dpy, RCM_INIT"Custom Init", 0);
238 pd->rcm_data = XInternAtom (dpy, RCM_DATA"Custom Data", 0);
239#endif
240
241 return pd;
242}
243
244Display *XtOpenDisplay(
245 XtAppContext app,
246 _Xconstconst char* displayName,
247 _Xconstconst char* applName,
248 _Xconstconst char* className,
249 XrmOptionDescRec *urlist,
250 Cardinal num_urs,
251 int *argc,
252 String *argv)
253{
254 Display *d;
255 XrmDatabase db = NULL((void*)0);
256 XtPerDisplay pd;
257 String language = NULL((void*)0);
258
259 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
260 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
261 /* parse the command line for name, display, and/or language */
262 db = _XtPreparseCommandLine(urlist, num_urs, *argc, argv,
263 (String *)&applName,
264 (String *)(displayName ? NULL((void*)0) : &displayName),
265 (app->process->globalLangProcRec.proc ?
266 &language : NULL((void*)0)));
267 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
268 d = XOpenDisplay(displayName);
269
270 if (! applName && !(applName = getenv("RESOURCE_NAME"))) {
271 if (*argc > 0 && argv[0] && *argv[0]) {
272#ifdef WIN32
273 char *ptr = strrchr(argv[0], '\\');
274#else
275 char *ptr = strrchr(argv[0], '/');
276#endif
277#ifdef __UNIXOS2__
278 char *dot_ptr,*ptr2;
279 ptr2 = strrchr(argv[0],'\\');
280 if (ptr2 > ptr) ptr = ptr2;
281 dot_ptr = strrchr(argv[0],'.');
282 if (dot_ptr && (dot_ptr > ptr)) *dot_ptr='\0';
283#endif /* This will remove the .exe suffix under OS/2 */
284
285 if (ptr) applName = ++ptr;
286 else applName = argv[0];
287 } else
288 applName = "main";
289 }
290
291 if (d) {
292 pd = InitPerDisplay(d, app, applName, className);
293 pd->language = language;
294 _XtDisplayInitialize(d, pd, applName, urlist, num_urs, argc, argv);
295 } else {
296 int len;
297 displayName = XDisplayName(displayName);
298 len = strlen (displayName);
299 app->display_name_tried = (String) __XtMalloc (len + 1);
300 strncpy ((char*) app->display_name_tried, displayName, len + 1);
301 app->display_name_tried[len] = '\0';
302 }
303 if (db) XrmDestroyDatabase(db);
304 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
305 return d;
306}
307
308Display *
309_XtAppInit(
310 XtAppContext * app_context_return,
311 String application_class,
312 XrmOptionDescRec *options,
313 Cardinal num_options,
314 int *argc_in_out,
315 String **argv_in_out,
316 String * fallback_resources)
317{
318 String *saved_argv;
319 int i;
320 Display *dpy;
321
322/*
323 * Save away argv and argc so we can set the properties later
324 */
325
326 saved_argv = (String *)
327 __XtMalloc( (Cardinal)((*argc_in_out + 1) * sizeof(String)) );
328
329 for (i = 0 ; i < *argc_in_out ; i++) saved_argv[i] = (*argv_in_out)[i];
330 saved_argv[i] = NULL((void*)0); /* NULL terminate that sucker. */
331
332
333 *app_context_return = XtCreateApplicationContext();
334
335 LOCK_APP((*app_context_return))if((*app_context_return) && (*app_context_return)->
lock)(*(*app_context_return)->lock)((*app_context_return));
336 if (fallback_resources) /* save a procedure call */
337 XtAppSetFallbackResources(*app_context_return, fallback_resources);
338
339 dpy = XtOpenDisplay(*app_context_return, (String) NULL((void*)0), NULL((void*)0),
340 application_class,
341 options, num_options, argc_in_out, *argv_in_out);
342
343 if (!dpy) {
344 String param = (*app_context_return)->display_name_tried;
345 Cardinal param_count = 1;
346 XtErrorMsg("invalidDisplay","xtInitialize",XtCXtToolkitError,
347 "Can't open display: %s", &param, &param_count);
348 XtFree((char *) (*app_context_return)->display_name_tried);
349 }
350 *argv_in_out = saved_argv;
351 UNLOCK_APP((*app_context_return))if((*app_context_return) && (*app_context_return)->
unlock)(*(*app_context_return)->unlock)((*app_context_return
));
352 return dpy;
353}
354
355void
356XtDisplayInitialize(
357 XtAppContext app,
358 Display *dpy,
359 _Xconstconst char* name,
360 _Xconstconst char* classname,
361 XrmOptionDescRec *urlist,
362 Cardinal num_urs,
363 int *argc,
364 String *argv
365 )
366{
367 XtPerDisplay pd;
368 XrmDatabase db = NULL((void*)0);
369
370 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
371 pd = InitPerDisplay(dpy, app, name, classname);
372 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
373 if (app->process->globalLangProcRec.proc)
374 /* pre-parse the command line for the language resource */
375 db = _XtPreparseCommandLine(urlist, num_urs, *argc, argv, NULL((void*)0), NULL((void*)0),
376 &pd->language);
377 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
378 _XtDisplayInitialize(dpy, pd, name, urlist, num_urs, argc, argv);
379 if (db) XrmDestroyDatabase(db);
380 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
381}
382
383XtAppContext XtCreateApplicationContext(void)
384{
385 XtAppContext app = XtNew(XtAppStruct)((XtAppStruct *) XtMalloc((unsigned) sizeof(XtAppStruct)));
386#ifdef XTHREADS1
387 app->lock_info = NULL((void*)0);
388 app->lock = NULL((void*)0);
389 app->unlock = NULL((void*)0);
390 app->yield_lock = NULL((void*)0);
391 app->restore_lock = NULL((void*)0);
392 app->free_lock = NULL((void*)0);
393#endif
394 INIT_APP_LOCK(app)if(_XtInitAppLock) (*_XtInitAppLock)(app);
395 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
396 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
397 app->process = _XtGetProcessContext();
398 app->next = app->process->appContextList;
399 app->process->appContextList = app;
400 app->langProcRec.proc = app->process->globalLangProcRec.proc;
401 app->langProcRec.closure = app->process->globalLangProcRec.closure;
402 app->destroy_callbacks = NULL((void*)0);
403 app->list = NULL((void*)0);
404 app->count = app->max = app->last = 0;
405 app->timerQueue = NULL((void*)0);
406 app->workQueue = NULL((void*)0);
407 app->signalQueue = NULL((void*)0);
408 app->input_list = NULL((void*)0);
409 app->outstandingQueue = NULL((void*)0);
410 app->errorDB = NULL((void*)0);
411 _XtSetDefaultErrorHandlers(&app->errorMsgHandler,
412 &app->warningMsgHandler, &app->errorHandler,
413 &app->warningHandler);
414 app->action_table = NULL((void*)0);
415 _XtSetDefaultSelectionTimeout(&app->selectionTimeout);
416 _XtSetDefaultConverterTable(&app->converterTable);
417 app->sync = app->being_destroyed = app->error_inited = FALSE0;
418 app->in_phase2_destroy = NULL((void*)0);
419#ifndef USE_POLL1
420 FD_ZERO(&app->fds.rmask)do { unsigned int __i; fd_set *__arr = (&app->fds.rmask
); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask
); ++__i) ((__arr)->__fds_bits)[__i] = 0; } while (0);
421 FD_ZERO(&app->fds.wmask)do { unsigned int __i; fd_set *__arr = (&app->fds.wmask
); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask
); ++__i) ((__arr)->__fds_bits)[__i] = 0; } while (0);
422 FD_ZERO(&app->fds.emask)do { unsigned int __i; fd_set *__arr = (&app->fds.emask
); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask
); ++__i) ((__arr)->__fds_bits)[__i] = 0; } while (0);
423#endif
424 app->fds.nfds = 0;
425 app->input_count = app->input_max = 0;
426 _XtHeapInit(&app->heap);
427 app->fallback_resources = NULL((void*)0);
428 _XtPopupInitialize(app);
429 app->action_hook_list = NULL((void*)0);
430 app->block_hook_list = NULL((void*)0);
431 app->destroy_list_size = app->destroy_count = app->dispatch_level = 0;
432 app->destroy_list = NULL((void*)0);
433#ifndef NO_IDENTIFY_WINDOWS
434 app->identify_windows = False0;
435#endif
436 app->free_bindings = NULL((void*)0);
437 app->display_name_tried = NULL((void*)0);
438 app->dpy_destroy_count = 0;
439 app->dpy_destroy_list = NULL((void*)0);
440 app->exit_flag = FALSE0;
441 app->rebuild_fdlist = TRUE1;
442 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
443 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
444 return app;
445}
446
447void XtAppSetExitFlag (
448 XtAppContext app)
449{
450 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
451 app->exit_flag = TRUE1;
452 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
453}
454
455Boolean XtAppGetExitFlag (
456 XtAppContext app)
457{
458 Boolean retval;
459 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
460 retval = app->exit_flag;
461 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
462 return retval;
463}
464
465static void DestroyAppContext(XtAppContext app)
466{
467 XtAppContext* prev_app;
468
469 prev_app = &app->process->appContextList;
470 while (app->count-- > 0) XtCloseDisplay(app->list[app->count]);
471 if (app->list != NULL((void*)0)) XtFree((char *)app->list);
472 _XtFreeConverterTable(app->converterTable);
473 _XtCacheFlushTag(app, (XtPointer)&app->heap);
474 _XtFreeActions(app->action_table);
475 if (app->destroy_callbacks != NULL((void*)0)) {
476 XtCallCallbackList((Widget) NULL((void*)0),
477 (XtCallbackList)app->destroy_callbacks,
478 (XtPointer)app);
479 _XtRemoveAllCallbacks(&app->destroy_callbacks);
480 }
481 while (app->timerQueue) XtRemoveTimeOut((XtIntervalId)app->timerQueue);
482 while (app->workQueue) XtRemoveWorkProc((XtWorkProcId)app->workQueue);
483 while (app->signalQueue) XtRemoveSignal((XtSignalId)app->signalQueue);
484 if (app->input_list) _XtRemoveAllInputs(app);
485 XtFree((char*)app->destroy_list);
486 _XtHeapFree(&app->heap);
487 while (*prev_app != app) prev_app = &(*prev_app)->next;
488 *prev_app = app->next;
489 if (app->process->defaultAppContext == app)
490 app->process->defaultAppContext = NULL((void*)0);
491 if (app->free_bindings) _XtDoFreeBindings (app);
492 FREE_APP_LOCK(app)if(app && app->free_lock)(*app->free_lock)(app);
493 XtFree((char *)app);
494}
495
496static XtAppContext* appDestroyList = NULL((void*)0);
497int _XtAppDestroyCount = 0;
498
499void XtDestroyApplicationContext(XtAppContext app)
500{
501 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
502 if (app->being_destroyed) {
503 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
504 return;
505 }
506
507 if (_XtSafeToDestroy(app)((app)->dispatch_level == 0)) {
508 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
509 DestroyAppContext(app);
510 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
511 } else {
512 app->being_destroyed = TRUE1;
513 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
514 _XtAppDestroyCount++;
515 appDestroyList =
516 (XtAppContext *) XtRealloc((char *) appDestroyList,
517 (unsigned) (_XtAppDestroyCount * sizeof(XtAppContext)));
518 appDestroyList[_XtAppDestroyCount-1] = app;
519 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
520 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
521 }
522}
523
524void _XtDestroyAppContexts(void)
525{
526 int i,ii;
527 XtAppContext apps[8];
528 XtAppContext* pApps;
529
530 pApps = XtStackAlloc (sizeof (XtAppContext) * _XtAppDestroyCount, apps)((sizeof (XtAppContext) * _XtAppDestroyCount) <= sizeof(apps
) ? (XtPointer)(apps) : XtMalloc((unsigned)(sizeof (XtAppContext
) * _XtAppDestroyCount)));
531
532 for (i = ii = 0; i < _XtAppDestroyCount; i++) {
533 if (_XtSafeToDestroy(appDestroyList[i])((appDestroyList[i])->dispatch_level == 0))
534 DestroyAppContext(appDestroyList[i]);
535 else
536 pApps[ii++] = appDestroyList[i];
537 }
538 _XtAppDestroyCount = ii;
539 if (_XtAppDestroyCount == 0) {
540 XtFree((char *) appDestroyList);
541 appDestroyList = NULL((void*)0);
542 } else {
543 for (i = 0; i < ii; i++)
544 appDestroyList[i] = pApps[i];
545 }
546 XtStackFree ((XtPointer) pApps, apps){ if (((XtPointer) pApps) != ((XtPointer)(apps))) XtFree((XtPointer
) pApps); };
547}
548
549XrmDatabase XtDatabase(Display *dpy)
550{
551 XrmDatabase retval;
552 DPY_TO_APPCON(dpy)XtAppContext app = (_XtProcessLock ? XtDisplayToApplicationContext
(dpy): ((void*)0));
553
554 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
555 retval = XrmGetDatabase(dpy);
556 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
557 return retval;
558}
559
560PerDisplayTablePtr _XtperDisplayList = NULL((void*)0);
561
562XtPerDisplay _XtSortPerDisplayList(Display *dpy)
563{
564 register PerDisplayTablePtr pd, opd = NULL((void*)0);
565
566 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
567 for (pd = _XtperDisplayList;
568 pd != NULL((void*)0) && pd->dpy != dpy;
569 pd = pd->next) {
570 opd = pd;
571 }
572
573 if (pd == NULL((void*)0)) {
574 XtErrorMsg(XtNnoPerDisplay, "getPerDisplay", XtCXtToolkitError,
575 "Couldn't find per display information",
576 (String *) NULL((void*)0), (Cardinal *)NULL((void*)0));
577 }
578
579 if (pd != _XtperDisplayList) { /* move it to the front */
580 /* opd points to the previous one... */
581
582 opd->next = pd->next;
583 pd->next = _XtperDisplayList;
584 _XtperDisplayList = pd;
585 }
586 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
587 return &(pd->perDpy);
588}
589
590XtAppContext XtDisplayToApplicationContext(Display *dpy)
591{
592 XtAppContext retval;
593
594 retval = _XtGetPerDisplay(dpy)->appContext;
595 return retval;
596}
597
598static void CloseDisplay(Display *dpy)
599{
600 register XtPerDisplay xtpd;
601 register PerDisplayTablePtr pd, opd = NULL((void*)0);
602 XrmDatabase db;
603 int i;
604
605 XtDestroyWidget(XtHooksOfDisplay(dpy));
606
607 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
1
Within the expansion of the macro 'LOCK_PROCESS':
a
Assuming '_XtProcessLock' is null
608 for (pd = _XtperDisplayList;
3
Loop condition is false. Execution continues on line 614
609 pd != NULL((void*)0) && pd->dpy != dpy;
2
Assuming 'pd' is equal to null
610 pd = pd->next){
611 opd = pd;
612 }
613
614 if (pd == NULL((void*)0)) {
4
Taking true branch
615 XtErrorMsg(XtNnoPerDisplay, "closeDisplay", XtCXtToolkitError,
616 "Couldn't find per display information",
617 (String *) NULL((void*)0), (Cardinal *)NULL((void*)0));
618 }
619
620 if (pd == _XtperDisplayList) _XtperDisplayList = pd->next;
5
Assuming 'pd' is not equal to '_XtperDisplayList'
6
Taking false branch
621 else opd->next = pd->next;
7
Access to field 'next' results in a dereference of a null pointer (loaded from variable 'pd')
622
623 xtpd = &(pd->perDpy);
624
625 if (xtpd != NULL((void*)0)) {
626 if (xtpd->destroy_callbacks != NULL((void*)0)) {
627 XtCallCallbackList((Widget) NULL((void*)0),
628 (XtCallbackList)xtpd->destroy_callbacks,
629 (XtPointer)xtpd);
630 _XtRemoveAllCallbacks(&xtpd->destroy_callbacks);
631 }
632 if (xtpd->mapping_callbacks != NULL((void*)0))
633 _XtRemoveAllCallbacks(&xtpd->mapping_callbacks);
634 XtDeleteFromAppContext(dpy, xtpd->appContext);
635 if (xtpd->keysyms)
636 XFree((char *) xtpd->keysyms);
637 XtFree((char *) xtpd->modKeysyms);
638 XtFree((char *) xtpd->modsToKeysyms);
639 xtpd->keysyms_per_keycode = 0;
640 xtpd->being_destroyed = FALSE0;
641 xtpd->keysyms = NULL((void*)0);
642 xtpd->modKeysyms = NULL((void*)0);
643 xtpd->modsToKeysyms = NULL((void*)0);
644 XDestroyRegion(xtpd->region);
645 _XtCacheFlushTag(xtpd->appContext, (XtPointer)&xtpd->heap);
646 _XtGClistFree(dpy, xtpd);
647 XtFree((char*)xtpd->pdi.trace);
648 _XtHeapFree(&xtpd->heap);
649 _XtFreeWWTable(xtpd);
650 xtpd->per_screen_db[DefaultScreen(dpy)(((_XPrivDisplay)dpy)->default_screen)] = (XrmDatabase)NULL((void*)0);
651 for (i = ScreenCount(dpy)(((_XPrivDisplay)dpy)->nscreens); --i >= 0; ) {
652 db = xtpd->per_screen_db[i];
653 if (db)
654 XrmDestroyDatabase(db);
655 }
656 XtFree((char *)xtpd->per_screen_db);
657 if ((db = XrmGetDatabase(dpy)))
658 XrmDestroyDatabase(db);
659 if (xtpd->cmd_db)
660 XrmDestroyDatabase(xtpd->cmd_db);
661 if (xtpd->server_db)
662 XrmDestroyDatabase(xtpd->server_db);
663 XtFree(xtpd->language);
664 if (xtpd->dispatcher_list != NULL((void*)0))
665 XtFree((char *) xtpd->dispatcher_list);
666 if (xtpd->ext_select_list != NULL((void*)0))
667 XtFree((char *) xtpd->ext_select_list);
668 }
669 XtFree((char*)pd);
670 XrmSetDatabase(dpy, (XrmDatabase)NULL((void*)0));
671 XCloseDisplay(dpy);
672 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
673}
674
675void XtCloseDisplay(Display *dpy)
676{
677 XtPerDisplay pd;
678 XtAppContext app = XtDisplayToApplicationContext(dpy);
679
680 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
681 pd = _XtGetPerDisplay(dpy);
682 if (pd->being_destroyed) {
683 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
684 return;
685 }
686
687 if (_XtSafeToDestroy(app)((app)->dispatch_level == 0)) CloseDisplay(dpy);
688 else {
689 pd->being_destroyed = TRUE1;
690 app->dpy_destroy_count++;
691 app->dpy_destroy_list = (Display **)
692 XtRealloc((char *) app->dpy_destroy_list,
693 (unsigned) (app->dpy_destroy_count * sizeof(Display *)));
694 app->dpy_destroy_list[app->dpy_destroy_count-1] = dpy;
695 }
696 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
697}
698
699void _XtCloseDisplays(XtAppContext app)
700{
701 int i;
702
703 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
704 for (i = 0; i < app->dpy_destroy_count; i++) {
705 CloseDisplay(app->dpy_destroy_list[i]);
706 }
707 app->dpy_destroy_count = 0;
708 XtFree((char *) app->dpy_destroy_list);
709 app->dpy_destroy_list = NULL((void*)0);
710 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
711}
712
713XtAppContext XtWidgetToApplicationContext(Widget w)
714{
715 XtAppContext retval;
716
717 retval = _XtGetPerDisplay(XtDisplayOfObject(w)((((Object)(w))->object.widget_class->core_class.class_inited
& 0x04) ? (w)->core.screen->display : _XtIsHookObject
(w) ? ((HookObject)(w))->hooks.screen->display : _XtWindowedAncestor
(w)->core.screen->display))->appContext;
718 return retval;
719}
720
721
722void XtGetApplicationNameAndClass(
723 Display *dpy,
724 String *name_return,
725 String *class_return)
726{
727 XtPerDisplay pd;
728
729 pd = _XtGetPerDisplay(dpy);
730 *name_return = XrmQuarkToString(pd->name);
731 *class_return = XrmQuarkToString(pd->class);
732}
733
734XtPerDisplay _XtGetPerDisplay (Display* display)
735{
736 XtPerDisplay retval;
737
738 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
739 retval = ((_XtperDisplayList != NULL((void*)0) &&
740 _XtperDisplayList->dpy == display)
741 ? &_XtperDisplayList->perDpy
742 : _XtSortPerDisplayList(display));
743 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
744 return retval;
745}
746
747XtPerDisplayInputRec* _XtGetPerDisplayInput(Display* display)
748{
749 XtPerDisplayInputRec* retval;
750 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
751 retval = ((_XtperDisplayList != NULL((void*)0) &&
752 _XtperDisplayList->dpy == display)
753 ? &_XtperDisplayList->perDpy.pdi
754 : &_XtSortPerDisplayList(display)->pdi);
755 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
756 return retval;
757}
758
759void XtGetDisplays(
760 XtAppContext app_context,
761 Display*** dpy_return,
762 Cardinal* num_dpy_return)
763{
764 int ii;
765 LOCK_APP(app_context)if(app_context && app_context->lock)(*app_context->
lock)(app_context);
766 *num_dpy_return = app_context->count;
767 *dpy_return = (Display**)__XtMalloc(app_context->count * sizeof(Display*));
768 for (ii = 0; ii < app_context->count; ii++)
769 (*dpy_return)[ii] = app_context->list[ii];
770 UNLOCK_APP(app_context)if(app_context && app_context->unlock)(*app_context
->unlock)(app_context);
771}