source: trunk/src/kernel32/mmap.cpp@ 2066

Last change on this file since 2066 was 2066, checked in by sandervl, 26 years ago

Fixes for the on-demand page loader; disabled by default for debugging
File size: 20.3 KB
Line 
1/* $Id: mmap.cpp,v 1.28 1999-12-13 19:28:14 sandervl Exp $ */
2
3/*
4 * Win32 Memory mapped file & view classes
5 *
6 * Copyright 1999 Sander van Leeuwen (sandervl@xs4all.nl)
7 *
8 * NOTE: Memory mapping DOES NOT work when kernel-mode code causes
9 * a pagefault in the memory mapped object. (exceptions aren't
10 * dispatched to our exception handler until after the kernel mode
11 * call returns (too late))
12 *
13 * NOTE: Are apps allowed to change the protection flags of memory mapped pages?
14 * I'm assuming they aren't for now.
15 *
16 * TODO: Handles returned should be usable by all apis that accept file handles
17 * TODO: Sharing memory mapped files between multiple processes
18 *
19 * Project Odin Software License can be found in LICENSE.TXT
20 *
21 */
22#include <os2win.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <win\virtual.h>
27#include <vmutex.h>
28#include <handlemanager.h>
29#include "mmap.h"
30#include "oslibdos.h"
31#include <winimagepeldr.h>
32
33//Global DLL Data
34#pragma data_seg(_GLOBALDATA)
35Win32MemMap *Win32MemMap::memmaps = NULL;
36VMutex globalmapMutex(VMUTEX_SHARED);
37#pragma data_seg()
38VMutex globalviewMutex;
39Win32MemMapView *Win32MemMapView::mapviews = NULL;
40
41//******************************************************************************
42//TODO: sharing between processes
43//******************************************************************************
44Win32MemMap::Win32MemMap(HFILE hfile, ULONG size, ULONG fdwProtect, LPSTR lpszName)
45 : nrMappings(0), pMapping(NULL), mMapAccess(0), referenced(0), image(0)
46{
47 globalmapMutex.enter();
48 next = memmaps;
49 memmaps = this;
50 globalmapMutex.leave();
51
52 hMemFile = hfile;
53
54 mSize = size;
55 mProtFlags = fdwProtect;
56 mProcessId = GetCurrentProcess();
57
58 if(lpszName) {
59 lpszMapName = (char *)_smalloc(strlen(lpszName)+1);
60 strcpy(lpszMapName, lpszName);
61 }
62 else lpszMapName = NULL;
63}
64//******************************************************************************
65//Map constructor used for executable image maps (only used internally)
66//******************************************************************************
67Win32MemMap::Win32MemMap(Win32PeLdrImage *pImage, ULONG baseAddress, ULONG size)
68 : nrMappings(0), pMapping(NULL), mMapAccess(0), referenced(0)
69{
70 globalmapMutex.enter();
71 next = memmaps;
72 memmaps = this;
73 globalmapMutex.leave();
74
75 hMemFile = -1;
76
77 mSize = size;
78 mProtFlags = PAGE_READWRITE;
79 mProcessId = GetCurrentProcess();
80
81 pMapping = (LPVOID)baseAddress;
82
83 image = pImage;
84 lpszMapName= NULL;
85}
86//******************************************************************************
87//******************************************************************************
88BOOL Win32MemMap::Init(HANDLE hMemMap)
89{
90 mapMutex.enter();
91 if(hMemFile != -1)
92 {
93 if(DuplicateHandle(mProcessId, hMemFile, GetCurrentProcess(),
94 &hMemFile, 0, FALSE, DUPLICATE_SAME_ACCESS) == FALSE)
95 {
96 dprintf(("Win32MemMap::Init: DuplicateHandle failed!"));
97 goto fail;
98 }
99 mSize = SetFilePointer(hMemFile, 0, NULL, FILE_END);
100 if(mSize == -1) {
101 dprintf(("Win32MemMap::init: SetFilePointer failed to set pos end"));
102 goto fail;
103 }
104 //SvL: Temporary limitation of size (Warp Server Advanced doesn't allow
105 // one to reserve more than 450 MB of continuous memory; (Warp 4
106 // much less))
107 if(mSize > 64*1024*1024) {
108 mSize = 64*1024*1024;
109 }
110 }
111
112 dprintf(("CreateFileMappingA for file %x, prot %x size %d, name %s", hMemFile, mProtFlags, mSize, lpszMapName));
113 this->hMemMap = hMemMap;
114 mapMutex.leave();
115 return TRUE;
116fail:
117 mapMutex.leave();
118 return FALSE;
119}
120//******************************************************************************
121//******************************************************************************
122Win32MemMap::~Win32MemMap()
123{
124 Win32MemMapView::deleteViews(this); //delete all views of our memory mapped file
125
126 dprintf(("Win32MemMap dtor: deleting view %x %x", pMapping, mSize));
127
128 mapMutex.enter();
129 if(lpszMapName) {
130 free(lpszMapName);
131 }
132 if(pMapping && !image) {
133 if(lpszMapName) {
134 OSLibDosFreeMem(pMapping);
135 }
136 else VirtualFree(pMapping, mSize, MEM_RELEASE);
137
138 pMapping = NULL;
139 }
140 if(hMemFile != -1) {
141 CloseHandle(hMemFile);
142 hMemFile = -1;
143 }
144 mapMutex.leave();
145
146 globalmapMutex.enter();
147 Win32MemMap *map = memmaps;
148
149 if(map == this) {
150 memmaps = next;
151 }
152 else {
153 while(map->next) {
154 if(map->next == this)
155 break;
156 map = map->next;
157 }
158 if(map->next) {
159 map->next = next;
160 }
161 else dprintf(("Win32MemMap::~Win32MemMap: map not found!! (%x)", this));
162 }
163 globalmapMutex.leave();
164}
165//******************************************************************************
166//We determine whether a page has been modified by checking it's protection flags
167//If the write flag is set, this means commitPage had to enable this due to a pagefault
168//(all pages are readonly until the app tries to write to it)
169//******************************************************************************
170BOOL Win32MemMap::commitPage(ULONG offset, BOOL fWriteAccess, int nrpages)
171{
172 MEMORY_BASIC_INFORMATION memInfo;
173 LPVOID lpPageFaultAddr = (LPVOID)((ULONG)pMapping + offset);
174 DWORD pageAddr = (DWORD)lpPageFaultAddr & ~0xFFF;
175 DWORD oldProt, newProt, nrBytesRead, size;
176 int i;
177
178// mapMutex.enter();
179
180 if(image) {
181 return image->commitPage(pageAddr, fWriteAccess);
182 }
183 newProt = mProtFlags & (PAGE_READONLY | PAGE_READWRITE | PAGE_WRITECOPY);
184
185 dprintf(("Win32MemMap::commitPage %x (faultaddr %x)", pageAddr, lpPageFaultAddr));
186 if(hMemFile != -1) {
187// for(i=0;i<nrpages;i++) {
188 if(VirtualQuery((LPSTR)pageAddr, &memInfo, nrpages*PAGE_SIZE) == 0) {
189 dprintf(("Win32MemMap::commitPage: VirtualQuery (%x,%x) failed for %x", pageAddr, nrpages*PAGE_SIZE));
190 goto fail;
191 }
192 //Only changes the state of the pages with the same attribute flags
193 //(returned in memInfo.RegionSize)
194 //If it's smaller than the mNrPages, it simply means one or more of the
195 //other pages have already been committed
196 if(memInfo.State & MEM_COMMIT)
197 {//if it's already committed, then the app tried to write to it
198 if(!fWriteAccess) {
199 dprintf(("Win32MemMap::commitPage: Huh? Already committed and not trying to write (%x,%x) failed for %x", pageAddr, memInfo.RegionSize));
200 goto fail;
201 }
202 if(VirtualProtect((LPVOID)pageAddr, memInfo.RegionSize, newProt, &oldProt) == FALSE) {
203 dprintf(("Win32MemMap::commitPage: Failed to set write flag on page (%x,%x) failed for %x", pageAddr, memInfo.RegionSize));
204 goto fail;
205 }
206 }
207 else {
208 if(VirtualAlloc((LPVOID)pageAddr, memInfo.RegionSize, MEM_COMMIT, PAGE_READWRITE) == FALSE) {
209 goto fail;
210 }
211 offset = pageAddr - (ULONG)pMapping;
212 size = memInfo.RegionSize;
213 if(offset + size > mSize) {
214 dprintf(("Adjusting size from %d to %d", size, mSize - offset));
215 size = mSize - offset;
216 }
217 if(SetFilePointer(hMemFile, offset, NULL, FILE_BEGIN) != offset) {
218 dprintf(("Win32MemMap::commitPage: SetFilePointer failed to set pos to %x", offset));
219 goto fail;
220 }
221 if(ReadFile(hMemFile, (LPSTR)pageAddr, size, &nrBytesRead, NULL) == FALSE) {
222 dprintf(("Win32MemMap::commitPage: ReadFile failed for %x", pageAddr));
223 goto fail;
224 }
225 if(nrBytesRead != size) {
226 dprintf(("Win32MemMap::commitPage: ReadFile didn't read all bytes for %x", pageAddr));
227 goto fail;
228 }
229 if(mProtFlags != PAGE_READWRITE) {
230 if(VirtualProtect((LPVOID)pageAddr, memInfo.RegionSize, newProt, &oldProt) == FALSE) {
231 goto fail;
232 }
233 }
234 }
235// pageAddr += PAGE_SIZE;
236// }
237 }
238 else {
239 for(i=0;i<nrpages;i++) {
240 if(VirtualQuery((LPSTR)pageAddr, &memInfo, PAGE_SIZE) == 0) {
241 dprintf(("Win32MemMap::commitPage: VirtualQuery (%x,%x) failed for %x", pageAddr, PAGE_SIZE));
242 goto fail;
243 }
244 if(!(memInfo.State & MEM_COMMIT))
245 {//if it's already committed, then the app tried to write to it
246 if(VirtualAlloc((LPVOID)pageAddr, memInfo.RegionSize, MEM_COMMIT, newProt) == FALSE)
247 goto fail;
248 }
249 pageAddr += PAGE_SIZE;
250 }
251 }
252
253// mapMutex.leave();
254 return TRUE;
255fail:
256// mapMutex.leave();
257 return FALSE;
258}
259//******************************************************************************
260//******************************************************************************
261BOOL Win32MemMap::unmapViewOfFile(Win32MemMapView *view)
262{
263 mapMutex.enter();
264
265 if(nrMappings == 0)
266 goto fail;
267
268 delete view;
269
270 if(--nrMappings) {
271 VirtualFree(pMapping, mSize, MEM_RELEASE);
272 pMapping = NULL;
273 }
274 mapMutex.leave();
275 return TRUE;
276fail:
277 mapMutex.leave();
278 return FALSE;
279}
280//******************************************************************************
281//******************************************************************************
282LPVOID Win32MemMap::mapViewOfFile(ULONG size, ULONG offset, ULONG fdwAccess)
283{
284 DWORD processId = GetCurrentProcess();
285
286 mapMutex.enter();
287 ULONG memFlags = (mProtFlags & (PAGE_READONLY | PAGE_READWRITE | PAGE_WRITECOPY));
288 ULONG fAlloc = 0;
289 Win32MemMapView *mapview;
290
291 //@@@PH: if(fdwAccess & ~(FILE_MAP_WRITE|FILE_MAP_READ|FILE_MAP_COPY))
292 // Docs say FILE_MAP_ALL_ACCESS is same as FILE_MAP_WRITE. Doesn't match reality though.
293 if(fdwAccess & ~FILE_MAP_ALL_ACCESS)
294 goto parmfail;
295 if((fdwAccess & FILE_MAP_WRITE) && !(mProtFlags & PAGE_READWRITE))
296 goto parmfail;
297 if((fdwAccess & FILE_MAP_READ) && !(mProtFlags & (PAGE_READWRITE|PAGE_READONLY)))
298 goto parmfail;
299
300 //@@@PH
301 if (fdwAccess != FILE_MAP_ALL_ACCESS)
302 if((fdwAccess & FILE_MAP_COPY) && !(mProtFlags & PAGE_WRITECOPY))
303 goto parmfail;
304
305 if(offset+size > mSize)
306 goto parmfail;
307
308//TODO: If committed, read file into memory
309#if 0
310 if(mProtFlags & SEC_COMMIT)
311 fAlloc |= MEM_COMMIT;
312 else
313 if(mProtFlags & SEC_RESERVE)
314 fAlloc |= MEM_RESERVE;
315#else
316 fAlloc = MEM_RESERVE;
317#endif
318
319 //Memory has already been allocated for executable image maps (only used internally)
320 if(!pMapping && nrMappings == 0) {//if not mapped, reserve/commit entire view
321 //SvL: Always read/write access or else ReadFile will crash once we
322 // start committing pages.
323 // This is most likely an OS/2 bug and doesn't happen in Aurora
324 // when allocating memory with the PAG_ANY bit set. (without this
325 // flag it will also crash)
326 if(lpszMapName) {
327 pMapping = VirtualAllocShared(mSize, fAlloc, PAGE_READWRITE, lpszMapName);
328 }
329 else {
330 pMapping = VirtualAlloc(0, mSize, fAlloc, PAGE_READWRITE);
331 }
332 if(pMapping == NULL) {
333 dprintf(("Win32MemMap::mapFileView: VirtualAlloc %x %x %x failed!", mSize, fAlloc, memFlags));
334 goto fail;
335 }
336 if(hMemFile == -1 && !image && (mProtFlags & SEC_COMMIT)) {//commit memory
337 VirtualAlloc(pMapping, mSize, MEM_COMMIT, PAGE_READWRITE);
338 }
339 }
340 mapview = new Win32MemMapView(this, offset, (size == 0) ? mSize : size, fdwAccess);
341 if(mapview == NULL) {
342 goto fail;
343 }
344 if(mapview->everythingOk() == FALSE) {
345 dprintf(("Win32MemMap::mapFileView: !mapview->everythingOk"));
346 delete mapview;
347 goto fail;
348 }
349 nrMappings++;
350 mapMutex.leave();
351 return mapview->getViewAddr();
352
353parmfail:
354 dprintf(("Win32MemMap::mapFileView: ERROR_INVALID_PARAMETER"));
355 SetLastError(ERROR_INVALID_PARAMETER);
356fail:
357 mapMutex.leave();
358 return 0;
359}
360//******************************************************************************
361//We determine whether a page has been modified by checking it's protection flags
362//If the write flag is set, this means commitPage had to enable this due to a pagefault
363//(all pages are readonly until the app tries to modify the contents of the page)
364//
365//TODO: Are apps allowed to change the protection flags of memory mapped pages?
366// I'm assuming they aren't for now.
367//******************************************************************************
368BOOL Win32MemMap::flushView(ULONG offset, ULONG cbFlush)
369{
370 LPVOID lpvBase = (LPVOID)((ULONG)pMapping+offset);
371 MEMORY_BASIC_INFORMATION memInfo;
372 ULONG nrBytesWritten, size;
373 int i;
374
375 if(image) //no flushing for image maps
376 return TRUE;
377
378 dprintf(("Win32MemMap::flushView: %x %x", lpvBase, cbFlush));
379 if(nrMappings == 0)
380 goto parmfail;
381
382 if(cbFlush == 0)
383 cbFlush = mSize;
384
385 if(lpvBase < pMapping || (ULONG)lpvBase+cbFlush > (ULONG)pMapping+mSize)
386 goto parmfail;
387
388 if(mProtFlags & PAGE_READONLY)
389 goto parmfail;
390
391 if(hMemFile == -1)
392 goto success; //TODO: Return an error here?
393
394 while(cbFlush) {
395 if(VirtualQuery((LPSTR)lpvBase, &memInfo, cbFlush) == 0) {
396 dprintf(("Win32MemMap::flushView: VirtualQuery (%x,%x) failed for %x", lpvBase, cbFlush, (ULONG)lpvBase+i*PAGE_SIZE));
397 goto fail;
398 }
399 //If a page (or range of pages) is reserved or write protected, we
400 //won't bother flushing it to disk
401 if(memInfo.State & MEM_COMMIT &&
402 memInfo.AllocationProtect & (PAGE_READWRITE|PAGE_WRITECOPY|PAGE_EXECUTE_READWRITE|PAGE_EXECUTE_WRITECOPY))
403 {//committed and allowed for writing?
404 offset = (ULONG)lpvBase - (ULONG)pMapping;
405 size = memInfo.RegionSize;
406 if(size > cbFlush) {
407 size = cbFlush;
408 }
409 dprintf(("Win32MemMap::flushView for offset %x, size %d", offset, size));
410
411 if(SetFilePointer(hMemFile, offset, NULL, FILE_BEGIN) != offset) {
412 dprintf(("Win32MemMap::flushView: SetFilePointer failed to set pos to %x", offset));
413 goto fail;
414 }
415 if(WriteFile(hMemFile, (LPSTR)lpvBase, size, &nrBytesWritten, NULL) == FALSE) {
416 dprintf(("Win32MemMap::flushView: WriteFile failed for %x", (ULONG)lpvBase));
417 goto fail;
418 }
419 if(nrBytesWritten != size) {
420 dprintf(("Win32MemMap::flushView: WriteFile didn't write all bytes for %x", (ULONG)lpvBase));
421 goto fail;
422 }
423 }
424 lpvBase = (LPVOID)((ULONG)lpvBase + memInfo.RegionSize);
425
426 if(cbFlush < memInfo.RegionSize)
427 break;
428
429 cbFlush -= memInfo.RegionSize;
430 }
431success:
432 return TRUE;
433parmfail:
434 SetLastError(ERROR_INVALID_PARAMETER);
435 return FALSE;
436fail:
437 return FALSE;
438}
439//******************************************************************************
440//******************************************************************************
441Win32MemMap *Win32MemMap::findMap(LPSTR lpszName)
442{
443 if(lpszName == NULL)
444 return NULL;
445
446 globalmapMutex.enter();
447 Win32MemMap *map = memmaps;
448
449 if(map != NULL) {
450 while(map) {
451 if(map->lpszMapName && !strcmp(map->lpszMapName, lpszName))
452 break;
453 map = map->next;
454 }
455 }
456 globalmapMutex.leave();
457 if(!map) dprintf(("Win32MemMap::findMap: couldn't find map %s", lpszName));
458 return map;
459}
460//******************************************************************************
461//******************************************************************************
462Win32MemMap *Win32MemMap::findMap(ULONG address)
463{
464 globalmapMutex.enter();
465 Win32MemMap *map = memmaps;
466
467 if(map != NULL) {
468 while(map) {
469 if(map->pMapping && (ULONG)map->pMapping <= address &&
470 (ULONG)map->pMapping + map->mSize > address)
471 {
472 break;
473 }
474 map = map->next;
475 }
476 }
477 globalmapMutex.leave();
478 return map;
479}
480//******************************************************************************
481//Assumes mutex has been acquired
482//******************************************************************************
483void Win32MemMap::deleteAll()
484{
485 Win32MemMap *map = memmaps, *nextmap;
486 DWORD processId = GetCurrentProcess();
487
488 //delete all maps created by this process
489 while(map) {
490 nextmap = map->next;
491 if(map->getProcessId() == processId) {
492 //Delete map directly for executable images (only used internally)
493 if(map->getImage()) {
494 delete map;
495 }
496 else CloseHandle(memmaps->hMemMap);
497 }
498 else {
499 //delete all views created by this process for this map
500 Win32MemMapView::deleteViews(map);
501 }
502 map = nextmap;
503 }
504}
505//******************************************************************************
506//******************************************************************************
507Win32MemMapView::Win32MemMapView(Win32MemMap *map, ULONG offset, ULONG size,
508 ULONG fdwAccess)
509{
510 LPVOID viewaddr = (LPVOID)((ULONG)map->getMappingAddr()+offset);
511 ULONG accessAttr = 0;
512 Win32MemMapView *tmpview = mapviews;
513
514 errorState = 0;
515 mParentMap = map;
516 mSize = size;
517 mOffset = offset;
518 mProcessId = GetCurrentProcess();
519
520 switch(fdwAccess) {
521 case FILE_MAP_READ:
522 accessAttr = PAG_READ;
523 mfAccess = MEMMAP_ACCESS_READ;
524 break;
525 case FILE_MAP_ALL_ACCESS:
526 case FILE_MAP_WRITE:
527 case FILE_MAP_COPY:
528 accessAttr = (PAG_READ|PAG_WRITE);
529 mfAccess = MEMMAP_ACCESS_READ | MEMMAP_ACCESS_WRITE;
530 break;
531 }
532 if(map->getMemName() != NULL) {
533 //shared memory map, so map it into our address space
534 if(OSLibDosGetNamedSharedMem((LPVOID *)&viewaddr, map->getMemName()) != OSLIB_NOERROR) {
535 dprintf(("new OSLibDosGetNamedSharedMem FAILED"));
536 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
537 errorState = 1;
538 return;
539 }
540 }
541
542 //view == memory mapping for executable images (only used internally)
543 if(map->getImage()) {
544 pMapView = map->getMappingAddr();
545 }
546 else {
547 if(OSLibDosAliasMem(viewaddr, size, &pMapView, accessAttr) != OSLIB_NOERROR) {
548 dprintf(("new OSLibDosAliasMem FAILED"));
549 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
550 errorState = 1;
551 return;
552 }
553 }
554
555 dprintf(("Win32MemMapView::Win32MemMapView: created %x (alias for %x), size %d", pMapView, viewaddr, size));
556
557 globalviewMutex.enter();
558 if(tmpview == NULL || tmpview->getViewAddr() > pMapView) {
559 next = mapviews;
560 mapviews = this;
561 }
562 else {
563 while(tmpview->next) {
564 if(tmpview->next->getViewAddr() > pMapView) {
565 break;
566 }
567 tmpview = tmpview->next;
568 }
569 next = tmpview->next;
570 tmpview->next = this;
571 }
572 globalviewMutex.leave();
573}
574//******************************************************************************
575//******************************************************************************
576Win32MemMapView::~Win32MemMapView()
577{
578 if(errorState != 0)
579 return;
580
581 dprintf(("Win32MemMapView dtor: deleting view %x %x", mOffset, mSize));
582
583 if(mfAccess & MEMMAP_ACCESS_WRITE)
584 mParentMap->flushView(mOffset, mSize);
585
586 //Don't free memory for executable image map views (only used internally)
587 if(!mParentMap->getImage())
588 OSLibDosFreeMem(pMapView);
589
590 globalviewMutex.enter();
591 Win32MemMapView *view = mapviews;
592
593 if(view == this) {
594 mapviews = next;
595 }
596 else {
597 while(view->next) {
598 if(view->next == this)
599 break;
600 view = view->next;
601 }
602 if(view->next) {
603 view->next = next;
604 }
605 else dprintf(("Win32MemMapView::~Win32MemMapView: map not found!! (%x)", this));
606 }
607 globalviewMutex.leave();
608}
609//******************************************************************************
610//******************************************************************************
611void Win32MemMapView::deleteViews(Win32MemMap *map)
612{
613 globalviewMutex.enter();
614 Win32MemMapView *view = mapviews, *nextview;
615
616 if(view != NULL) {
617 while(view) {
618 nextview = view->next;
619 if(view->getParentMap() == map)
620 {
621 globalviewMutex.leave();
622 delete view;
623 globalviewMutex.enter();
624 }
625 view = nextview;
626 }
627 }
628 globalviewMutex.leave();
629}
630//******************************************************************************
631//******************************************************************************
632Win32MemMap *Win32MemMapView::findMapByView(ULONG address, ULONG *offset,
633 ULONG accessType,
634 Win32MemMapView **pView)
635{
636 globalviewMutex.enter();
637 Win32MemMapView *view = mapviews;
638
639 *offset = 0;
640
641 if(view != NULL) {
642 while(view && (ULONG)view->getViewAddr() <= address) {
643 if((ULONG)view->getViewAddr() <= address &&
644 (ULONG)view->getViewAddr() + view->getSize() > address &&
645 view->getAccessFlags() >= accessType)
646 {
647 *offset = view->getOffset() + (address - (ULONG)view->getViewAddr());
648 goto success;
649 }
650 view = view->next;
651 }
652 //failure if we get here
653 view = NULL;
654 }
655success:
656 if(view && !view->getParentMap()->isImageMap())
657 dprintf(("findMapByView %x %x -> %x off %x", address, accessType, view->getViewAddr(), *offset));
658
659 globalviewMutex.leave();
660 if(pView) *pView = view;
661 return (view) ? view->getParentMap() : NULL;
662}
663//******************************************************************************
664//******************************************************************************
665Win32MemMapView *Win32MemMapView::findView(LPVOID address)
666{
667 Win32MemMapView *view = mapviews;
668
669 if(view != NULL) {
670 while(view) {
671 if(view->getViewAddr() == address)
672 {
673 break;
674 }
675 view = view->next;
676 }
677 }
678 return view;
679}
680//******************************************************************************
681//******************************************************************************
682
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