source: trunk/src/kernel32/mmap.cpp@ 7029

Last change on this file since 7029 was 6468, checked in by sandervl, 24 years ago

CreateProcess & memory map fixes
File size: 25.7 KB
Line 
1/* $Id: mmap.cpp,v 1.52 2001-08-06 16:01:11 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 * TODO: Memory mapped files with views that extend the file (not 100% correct now)
19 * TODO: Suspend all threads when a page is committed (possible that another thread
20 * accesses the same memory before the page is read from disk
21 * TODO: File maps for new files (must select an initial size)!
22 *
23 * Project Odin Software License can be found in LICENSE.TXT
24 *
25 */
26#include <os2win.h>
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30#include <win\virtual.h>
31#include <vmutex.h>
32#include <handlemanager.h>
33#include "mmap.h"
34#include "oslibdos.h"
35#include <winimagepeldr.h>
36
37#define DBG_LOCALLOG DBG_mmap
38#include "dbglocal.h"
39
40//NOTE: This must be in the local data segment -> if a shared semaphore was
41// created by a different process, the handle returned by DosOpenMutexSem
42// will be returned in hGlobalMapMutex
43HMTX hGlobalMapMutex = 0;
44
45//Global DLL Data
46#pragma data_seg(_GLOBALDATA)
47Win32MemMap *Win32MemMap::memmaps = NULL;
48VMutex globalmapMutex(VMUTEX_SHARED, &hGlobalMapMutex);
49#pragma data_seg()
50VMutex globalviewMutex;
51Win32MemMapView *Win32MemMapView::mapviews = NULL;
52
53//******************************************************************************
54//TODO: sharing between processes
55//******************************************************************************
56Win32MemMap::Win32MemMap(HFILE hfile, ULONG size, ULONG fdwProtect, LPSTR lpszName)
57 : nrMappings(0), pMapping(NULL), mMapAccess(0), referenced(0), image(0)
58{
59 globalmapMutex.enter(VMUTEX_WAIT_FOREVER, &hGlobalMapMutex);
60 next = memmaps;
61 memmaps = this;
62 globalmapMutex.leave(&hGlobalMapMutex);
63
64 hMemFile = hfile;
65
66 mSize = size;
67 mProtFlags = fdwProtect;
68 mProcessId = GetCurrentProcessId();
69
70 if(lpszName) {
71 lpszMapName = (char *)_smalloc(strlen(lpszName)+1);
72 strcpy(lpszMapName, lpszName);
73 }
74 else lpszMapName = NULL;
75}
76//******************************************************************************
77//Map constructor used for executable image maps (only used internally)
78//******************************************************************************
79Win32MemMap::Win32MemMap(Win32PeLdrImage *pImage, ULONG baseAddress, ULONG size)
80 : nrMappings(0), pMapping(NULL), mMapAccess(0), referenced(0), image(0)
81{
82 globalmapMutex.enter(VMUTEX_WAIT_FOREVER, &hGlobalMapMutex);
83 next = memmaps;
84 memmaps = this;
85 globalmapMutex.leave(&hGlobalMapMutex);
86
87 hMemFile = -1;
88
89 mSize = size;
90 mProtFlags = PAGE_READWRITE;
91 mProcessId = GetCurrentProcessId();
92
93 pMapping = (LPVOID)baseAddress;
94
95 image = pImage;
96 lpszMapName= NULL;
97}
98//******************************************************************************
99//******************************************************************************
100BOOL Win32MemMap::Init()
101{
102 mapMutex.enter();
103 if(hMemFile != -1)
104 {
105#if 0
106 if(DuplicateHandle(GetCurrentProcess(), hMemFile, GetCurrentProcess(),
107 &hMemFile, 0, FALSE, DUPLICATE_SAME_ACCESS) == FALSE)
108#else
109 DWORD dwOdinOptions;
110
111 if(!(mProtFlags & PAGE_READWRITE)) {
112 dwOdinOptions = DUPLICATE_ACCESS_READ | DUPLICATE_SHARE_DENYNONE;
113 }
114 else dwOdinOptions = DUPLICATE_ACCESS_READWRITE | DUPLICATE_SHARE_DENYNONE;
115
116 if(HMDuplicateHandleOdin(GetCurrentProcess(), hMemFile, GetCurrentProcess(),
117 &hMemFile, 0, FALSE, DUPLICATE_SAME_ACCESS, dwOdinOptions) == FALSE)
118#endif
119 {
120 dprintf(("Win32MemMap::Init: DuplicateHandle failed!"));
121 goto fail;
122 }
123 mSize = SetFilePointer(hMemFile, 0, NULL, FILE_BEGIN);
124 mSize = SetFilePointer(hMemFile, 0, NULL, FILE_END);
125 if(mSize == -1) {
126 dprintf(("Win32MemMap::init: SetFilePointer failed to set pos end"));
127 goto fail;
128 }
129 //SvL: Temporary limitation of size (Warp Server Advanced doesn't allow
130 // one to reserve more than 450 MB (unless you override the virtual
131 // memory max limit) of continuous memory; (Warp 4 much less))
132 if(mSize > 64*1024*1024) {
133 mSize = 64*1024*1024;
134 }
135 }
136
137 dprintf(("CreateFileMappingA for file %x, prot %x size %d, name %s", hMemFile, mProtFlags, mSize, lpszMapName));
138 mapMutex.leave();
139 return TRUE;
140fail:
141 mapMutex.leave();
142 return FALSE;
143}
144//******************************************************************************
145//******************************************************************************
146Win32MemMap::~Win32MemMap()
147{
148 Win32MemMapView::deleteViews(this); //delete all views of our memory mapped file
149
150 dprintf(("Win32MemMap dtor: deleting view %x %x", pMapping, mSize));
151
152 mapMutex.enter();
153 if(lpszMapName) {
154 free(lpszMapName);
155 }
156 if(pMapping && !image) {
157 if(lpszMapName) {
158 OSLibDosFreeMem(pMapping);
159 }
160 else VirtualFree(pMapping, 0, MEM_RELEASE);
161
162 pMapping = NULL;
163 }
164 if(hMemFile != -1) {
165 dprintf(("Win32MemMap dtor: closing memory file %x", hMemFile));
166 CloseHandle(hMemFile);
167 hMemFile = -1;
168 }
169 mapMutex.leave();
170
171 globalmapMutex.enter(VMUTEX_WAIT_FOREVER, &hGlobalMapMutex);
172 Win32MemMap *map = memmaps;
173
174 if(map == this) {
175 memmaps = next;
176 }
177 else {
178 while(map->next) {
179 if(map->next == this)
180 break;
181 map = map->next;
182 }
183 if(map->next) {
184 map->next = next;
185 }
186 else dprintf(("Win32MemMap::~Win32MemMap: map not found!! (%x)", this));
187 }
188 globalmapMutex.leave(&hGlobalMapMutex);
189}
190//******************************************************************************
191//If memory map has no more views left, then we can safely delete it when
192//it's handle is closed
193//******************************************************************************
194void Win32MemMap::Release()
195{
196 dprintf(("Win32MemMap::Release %s (%d)", lpszMapName, referenced-1));
197 --referenced;
198 if(nrMappings == 0 && referenced == 0) {
199 delete this;
200 }
201}
202//******************************************************************************
203//We determine whether a page has been modified by checking it's protection flags
204//If the write flag is set, this means commitPage had to enable this due to a pagefault
205//(all pages are readonly until the app tries to write to it)
206//******************************************************************************
207BOOL Win32MemMap::commitPage(ULONG offset, BOOL fWriteAccess, int nrpages)
208{
209 MEMORY_BASIC_INFORMATION memInfo;
210 LPVOID lpPageFaultAddr = (LPVOID)((ULONG)pMapping + offset);
211 DWORD pageAddr = (DWORD)lpPageFaultAddr & ~0xFFF;
212 DWORD oldProt, newProt, nrBytesRead, size;
213 int i;
214
215// mapMutex.enter();
216
217 if(image) {
218 return image->commitPage(pageAddr, fWriteAccess);
219 }
220 newProt = mProtFlags & (PAGE_READONLY | PAGE_READWRITE | PAGE_WRITECOPY);
221
222 dprintf(("Win32MemMap::commitPage %x (faultaddr %x)", pageAddr, lpPageFaultAddr));
223 if(hMemFile != -1)
224 {
225 int faultsize = nrpages*PAGE_SIZE;
226
227 offset = pageAddr - (ULONG)pMapping;
228 if(offset + faultsize > mSize) {
229 faultsize = mSize - offset;
230 }
231
232 while(faultsize) {
233 if(VirtualQuery((LPSTR)pageAddr, &memInfo, sizeof(MEMORY_BASIC_INFORMATION)) == 0) {
234 dprintf(("Win32MemMap::commitPage: VirtualQuery (%x,%x) failed for %x", pageAddr, nrpages*PAGE_SIZE));
235 goto fail;
236 }
237 memInfo.RegionSize = min(memInfo.RegionSize, faultsize);
238 //Only changes the state of the pages with the same attribute flags
239 //(returned in memInfo.RegionSize)
240 //If it's smaller than the mNrPages, it simply means one or more of the
241 //other pages have already been committed
242 if(!(memInfo.State & MEM_COMMIT))
243 {
244 if(VirtualAlloc((LPVOID)pageAddr, memInfo.RegionSize, MEM_COMMIT, PAGE_READWRITE) == FALSE) {
245 goto fail;
246 }
247 offset = pageAddr - (ULONG)pMapping;
248 size = memInfo.RegionSize;
249 if(offset + size > mSize) {
250 dprintf(("Adjusting size from %d to %d", size, mSize - offset));
251 size = mSize - offset;
252 }
253 if(SetFilePointer(hMemFile, offset, NULL, FILE_BEGIN) != offset) {
254 dprintf(("Win32MemMap::commitPage: SetFilePointer failed to set pos to %x", offset));
255 goto fail;
256 }
257 if(ReadFile(hMemFile, (LPSTR)pageAddr, size, &nrBytesRead, NULL) == FALSE) {
258 dprintf(("Win32MemMap::commitPage: ReadFile failed for %x", pageAddr));
259 goto fail;
260 }
261 if(nrBytesRead != size) {
262 dprintf(("Win32MemMap::commitPage: ReadFile didn't read all bytes for %x", pageAddr));
263 goto fail;
264 }
265 if(newProt != PAGE_READWRITE) {
266 if(VirtualProtect((LPVOID)pageAddr, memInfo.RegionSize, newProt, &oldProt) == FALSE) {
267 goto fail;
268 }
269 }
270 }
271 faultsize -= memInfo.RegionSize;
272 pageAddr += memInfo.RegionSize;
273 }
274 }
275 else {
276 ULONG sizeleft = nrpages*PAGE_SIZE;
277 while(sizeleft)
278 {
279 if(VirtualQuery((LPSTR)pageAddr, &memInfo, sizeof(MEMORY_BASIC_INFORMATION)) == 0) {
280 dprintf(("Win32MemMap::commitPage: VirtualQuery (%x,%x) failed", pageAddr, sizeleft));
281 goto fail;
282 }
283 memInfo.RegionSize = min(memInfo.RegionSize, sizeleft);
284
285 if(!(memInfo.State & MEM_COMMIT))
286 {//if it's already committed, then the app tried to write to it
287 if(VirtualAlloc((LPVOID)pageAddr, memInfo.RegionSize, MEM_COMMIT, newProt) == FALSE)
288 goto fail;
289 }
290 memInfo.RegionSize = (memInfo.RegionSize+PAGE_SIZE-1) & ~0xfff;
291 pageAddr += memInfo.RegionSize;
292 sizeleft -= memInfo.RegionSize;
293 }
294 }
295
296// mapMutex.leave();
297 return TRUE;
298fail:
299// mapMutex.leave();
300 return FALSE;
301}
302//******************************************************************************
303//******************************************************************************
304BOOL Win32MemMap::unmapViewOfFile(Win32MemMapView *view)
305{
306 dprintf(("Win32MemMap::unmapViewOfFile %x (nrmaps=%d)", view, nrMappings));
307 mapMutex.enter();
308
309 if(nrMappings == 0)
310 goto fail;
311
312 delete view;
313
314 if(--nrMappings == 0) {
315 VirtualFree(pMapping, 0, MEM_RELEASE);
316 pMapping = NULL;
317 }
318 mapMutex.leave();
319
320 //if there are no more mappings left and the memory map's handle has been
321 //closed, then delete the object
322 if(nrMappings == 0 && referenced == 0) {
323 delete this;
324 }
325 return TRUE;
326fail:
327 mapMutex.leave();
328 if(nrMappings == 0 && referenced == 0) {
329 delete this;
330 }
331 return FALSE;
332}
333//******************************************************************************
334//******************************************************************************
335LPVOID Win32MemMap::mapViewOfFile(ULONG size, ULONG offset, ULONG fdwAccess)
336{
337 DWORD processId = GetCurrentProcessId();
338
339 mapMutex.enter();
340 ULONG memFlags = (mProtFlags & (PAGE_READONLY | PAGE_READWRITE | PAGE_WRITECOPY));
341 ULONG fAlloc = 0;
342 Win32MemMapView *mapview;
343
344 //@@@PH: if(fdwAccess & ~(FILE_MAP_WRITE|FILE_MAP_READ|FILE_MAP_COPY))
345 // Docs say FILE_MAP_ALL_ACCESS is same as FILE_MAP_WRITE. Doesn't match reality though.
346 if(fdwAccess & ~FILE_MAP_ALL_ACCESS)
347 goto parmfail;
348 if((fdwAccess & FILE_MAP_WRITE) && !(mProtFlags & PAGE_READWRITE))
349 goto parmfail;
350 if((fdwAccess & FILE_MAP_READ) && !(mProtFlags & (PAGE_READWRITE|PAGE_READONLY)))
351 goto parmfail;
352
353 //@@@PH
354 if (fdwAccess != FILE_MAP_ALL_ACCESS)
355 if((fdwAccess & FILE_MAP_COPY) && !(mProtFlags & PAGE_WRITECOPY))
356 goto parmfail;
357
358 if(offset+size > mSize && (!(fdwAccess & FILE_MAP_WRITE) || hMemFile == -1))
359 goto parmfail;
360
361 //SvL: TODO: Doesn't work for multiple views
362 if(offset+size > mSize) {
363 mSize = offset+size;
364 }
365
366//TODO: If committed, read file into memory
367#if 0
368 if(mProtFlags & SEC_COMMIT)
369 fAlloc |= MEM_COMMIT;
370 else
371 if(mProtFlags & SEC_RESERVE)
372 fAlloc |= MEM_RESERVE;
373#else
374 fAlloc = MEM_RESERVE;
375#endif
376
377 //Memory has already been allocated for executable image maps (only used internally)
378 if(!pMapping && nrMappings == 0) {//if not mapped, reserve/commit entire view
379 //SvL: Always read/write access or else ReadFile will crash once we
380 // start committing pages.
381 // This is most likely an OS/2 bug and doesn't happen in Aurora
382 // when allocating memory with the PAG_ANY bit set. (without this
383 // flag it will also crash)
384 if(hMemFile == -1 && lpszMapName) {
385 pMapping = VirtualAllocShared(mSize, fAlloc, PAGE_READWRITE, lpszMapName);
386 }
387 else {
388 pMapping = VirtualAlloc(0, mSize, fAlloc, PAGE_READWRITE);
389 }
390 if(pMapping == NULL) {
391 dprintf(("Win32MemMap::mapFileView: VirtualAlloc %x %x %x failed!", mSize, fAlloc, memFlags));
392 goto fail;
393 }
394 //Windows NT seems to commit memory for memory maps, regardsless of the SEC_COMMIT flag
395 if((hMemFile == -1 && !image)) {//commit memory
396 VirtualAlloc(pMapping, mSize, MEM_COMMIT, PAGE_READWRITE);
397 }
398 if(hMemFile != -1 && (mProtFlags & SEC_COMMIT)) {
399 DWORD nrPages = mSize >> PAGE_SHIFT;
400 if(mSize & 0xFFF)
401 nrPages++;
402
403 commitPage(0, FALSE, nrPages);
404 }
405 }
406 mapview = new Win32MemMapView(this, offset, (size == 0) ? mSize : size, fdwAccess);
407 if(mapview == NULL) {
408 goto fail;
409 }
410 if(mapview->everythingOk() == FALSE) {
411 dprintf(("Win32MemMap::mapFileView: !mapview->everythingOk"));
412 delete mapview;
413 goto fail;
414 }
415 nrMappings++;
416 mapMutex.leave();
417 return mapview->getViewAddr();
418
419parmfail:
420 dprintf(("Win32MemMap::mapFileView: ERROR_INVALID_PARAMETER"));
421 SetLastError(ERROR_INVALID_PARAMETER);
422fail:
423 mapMutex.leave();
424 return 0;
425}
426//******************************************************************************
427//We determine whether a page has been modified by checking it's protection flags
428//If the write flag is set, this means commitPage had to enable this due to a pagefault
429//(all pages are readonly until the app tries to modify the contents of the page)
430//
431//TODO: Are apps allowed to change the protection flags of memory mapped pages?
432// I'm assuming they aren't for now.
433//******************************************************************************
434BOOL Win32MemMap::flushView(ULONG offset, ULONG cbFlush)
435{
436 LPVOID lpvBase = (LPVOID)((ULONG)pMapping+offset);
437 MEMORY_BASIC_INFORMATION memInfo;
438 ULONG nrBytesWritten, size;
439 int i;
440
441 if(image) //no flushing for image maps
442 return TRUE;
443
444 dprintf(("Win32MemMap::flushView: %x %x", lpvBase, cbFlush));
445 if(nrMappings == 0)
446 goto parmfail;
447
448 if(cbFlush == 0)
449 cbFlush = mSize;
450
451 if(lpvBase < pMapping || (ULONG)lpvBase+cbFlush > (ULONG)pMapping+mSize)
452 goto parmfail;
453
454 if(mProtFlags & PAGE_READONLY)
455 goto parmfail;
456
457 if(hMemFile == -1)
458 goto success; //TODO: Return an error here?
459
460 while(cbFlush) {
461 if(VirtualQuery((LPSTR)lpvBase, &memInfo, sizeof(MEMORY_BASIC_INFORMATION)) == 0) {
462 dprintf(("Win32MemMap::flushView: VirtualQuery (%x,%x) failed for %x", lpvBase, cbFlush, (ULONG)lpvBase+i*PAGE_SIZE));
463 goto fail;
464 }
465 //If a page (or range of pages) is reserved or write protected, we
466 //won't bother flushing it to disk
467 if(memInfo.State & MEM_COMMIT &&
468 memInfo.AllocationProtect & (PAGE_READWRITE|PAGE_WRITECOPY|PAGE_EXECUTE_READWRITE|PAGE_EXECUTE_WRITECOPY))
469 {//committed and allowed for writing?
470 offset = (ULONG)lpvBase - (ULONG)pMapping;
471 size = memInfo.RegionSize;
472 if(size > cbFlush) {
473 size = cbFlush;
474 }
475 dprintf(("Win32MemMap::flushView for offset %x, size %d", offset, size));
476
477 if(SetFilePointer(hMemFile, offset, NULL, FILE_BEGIN) != offset) {
478 dprintf(("Win32MemMap::flushView: SetFilePointer failed to set pos to %x", offset));
479 goto fail;
480 }
481 if(WriteFile(hMemFile, (LPSTR)lpvBase, size, &nrBytesWritten, NULL) == FALSE) {
482 dprintf(("Win32MemMap::flushView: WriteFile failed for %x", (ULONG)lpvBase));
483 goto fail;
484 }
485 if(nrBytesWritten != size) {
486 dprintf(("Win32MemMap::flushView: WriteFile didn't write all bytes for %x", (ULONG)lpvBase));
487 goto fail;
488 }
489 }
490 lpvBase = (LPVOID)((ULONG)lpvBase + memInfo.RegionSize);
491
492 if(cbFlush < memInfo.RegionSize)
493 break;
494
495 cbFlush -= memInfo.RegionSize;
496 }
497success:
498 return TRUE;
499parmfail:
500 SetLastError(ERROR_INVALID_PARAMETER);
501 return FALSE;
502fail:
503 return FALSE;
504}
505//******************************************************************************
506//******************************************************************************
507Win32MemMap *Win32MemMap::findMap(LPSTR lpszName)
508{
509 if(lpszName == NULL)
510 return NULL;
511
512 globalmapMutex.enter(VMUTEX_WAIT_FOREVER, &hGlobalMapMutex);
513 Win32MemMap *map = memmaps;
514
515 if(map != NULL) {
516 while(map) {
517 if(map->lpszMapName && !strcmp(map->lpszMapName, lpszName))
518 break;
519 map = map->next;
520 }
521 }
522 globalmapMutex.leave(&hGlobalMapMutex);
523 if(!map) dprintf(("Win32MemMap::findMap: couldn't find map %s", lpszName));
524 return map;
525}
526//******************************************************************************
527//******************************************************************************
528Win32MemMap *Win32MemMap::findMap(ULONG address)
529{
530 globalmapMutex.enter(VMUTEX_WAIT_FOREVER, &hGlobalMapMutex);
531 Win32MemMap *map = memmaps;
532
533 if(map != NULL) {
534 while(map) {
535 if(map->pMapping && (ULONG)map->pMapping <= address &&
536 (ULONG)map->pMapping + map->mSize > address)
537 {
538 break;
539 }
540 map = map->next;
541 }
542 }
543 globalmapMutex.leave(&hGlobalMapMutex);
544 return map;
545}
546//******************************************************************************
547//******************************************************************************
548void Win32MemMap::deleteAll()
549{
550 Win32MemMap *map = memmaps, *nextmap;
551 DWORD processId = GetCurrentProcessId();
552
553 //delete all maps created by this process
554 globalviewMutex.enter();
555 while(map) {
556 nextmap = map->next;
557 if(map->getProcessId() == processId) {
558 //Delete map directly for executable images (only used internally)
559 if(map->getImage()) {
560 delete map;
561 }
562 else {
563 delete map;
564 }
565 }
566 else {
567 //delete all views created by this process for this map
568 Win32MemMapView::deleteViews(map);
569 }
570 map = nextmap;
571 }
572 globalviewMutex.leave();
573}
574//******************************************************************************
575//******************************************************************************
576Win32MemMapView::Win32MemMapView(Win32MemMap *map, ULONG offset, ULONG size,
577 ULONG fdwAccess)
578{
579 LPVOID viewaddr = (LPVOID)((ULONG)map->getMappingAddr()+offset);
580 ULONG accessAttr = 0;
581 Win32MemMapView *tmpview = mapviews;
582
583 errorState = 0;
584 mParentMap = map;
585 mSize = size;
586 mOffset = offset;
587 mProcessId = GetCurrentProcessId();
588 pShareViewAddr = NULL;
589
590 switch(fdwAccess) {
591 case FILE_MAP_READ:
592 accessAttr = PAG_READ;
593 mfAccess = MEMMAP_ACCESS_READ;
594 break;
595 case FILE_MAP_ALL_ACCESS:
596 case FILE_MAP_WRITE:
597 case FILE_MAP_WRITE|FILE_MAP_READ:
598 case FILE_MAP_COPY:
599 accessAttr = (PAG_READ|PAG_WRITE);
600 mfAccess = MEMMAP_ACCESS_READ | MEMMAP_ACCESS_WRITE;
601 break;
602 }
603 if(map->getMemName() != NULL && map->getFileHandle() == -1 &&
604 map->getProcessId() != mProcessId)
605 {
606 //shared memory map, so map it into our address space
607 if(OSLibDosGetNamedSharedMem((LPVOID *)&viewaddr, map->getMemName()) != OSLIB_NOERROR) {
608 dprintf(("new OSLibDosGetNamedSharedMem FAILED"));
609 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
610 errorState = 1;
611 return;
612 }
613 pShareViewAddr = viewaddr;
614 }
615
616 //view == memory mapping for executable images (only used internally)
617 if(map->getImage()) {
618 pMapView = map->getMappingAddr();
619 }
620 else {
621 if(OSLibDosAliasMem(viewaddr, size, &pMapView, accessAttr) != OSLIB_NOERROR) {
622 dprintf(("new OSLibDosAliasMem FAILED"));
623 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
624 errorState = 1;
625 return;
626 }
627 }
628 dprintf(("Win32MemMapView::Win32MemMapView: created %x (alias for %x), size %d", pMapView, viewaddr, size));
629
630 globalviewMutex.enter();
631 if(tmpview == NULL || tmpview->getViewAddr() > pMapView) {
632 next = mapviews;
633 mapviews = this;
634 }
635 else {
636 while(tmpview->next) {
637 if(tmpview->next->getViewAddr() > pMapView) {
638 break;
639 }
640 tmpview = tmpview->next;
641 }
642 next = tmpview->next;
643 tmpview->next = this;
644 }
645 globalviewMutex.leave();
646}
647//******************************************************************************
648//******************************************************************************
649Win32MemMapView::~Win32MemMapView()
650{
651 if(errorState != 0)
652 return;
653
654 dprintf(("Win32MemMapView dtor: deleting view %x %x", mOffset, mSize));
655
656 if(mfAccess & MEMMAP_ACCESS_WRITE)
657 mParentMap->flushView(mOffset, mSize);
658
659 //Don't free memory for executable image map views (only used internally)
660 if(!mParentMap->getImage())
661 OSLibDosFreeMem(pMapView);
662
663 if(pShareViewAddr) {
664 OSLibDosFreeMem(pShareViewAddr);
665 }
666
667 globalviewMutex.enter();
668 Win32MemMapView *view = mapviews;
669
670 if(view == this) {
671 mapviews = next;
672 }
673 else {
674 while(view->next) {
675 if(view->next == this)
676 break;
677 view = view->next;
678 }
679 if(view->next) {
680 view->next = next;
681 }
682 else dprintf(("Win32MemMapView::~Win32MemMapView: map not found!! (%x)", this));
683 }
684 globalviewMutex.leave();
685}
686//******************************************************************************
687//******************************************************************************
688void Win32MemMapView::deleteViews(Win32MemMap *map)
689{
690 globalviewMutex.enter();
691 Win32MemMapView *view = mapviews, *nextview;
692
693 if(view != NULL) {
694 while(view) {
695 nextview = view->next;
696 if(view->getParentMap() == map)
697 {
698 globalviewMutex.leave();
699 delete view;
700 globalviewMutex.enter();
701 }
702 view = nextview;
703 }
704 }
705 globalviewMutex.leave();
706}
707//******************************************************************************
708//******************************************************************************
709Win32MemMap *Win32MemMapView::findMapByView(ULONG address,
710 ULONG *offset,
711 ULONG accessType,
712 Win32MemMapView **pView)
713{
714 globalviewMutex.enter();
715 Win32MemMapView *view = mapviews;
716 ULONG ulViewAddr;
717
718 *offset = 0;
719
720 if(view != NULL)
721 {
722 do
723 {
724 ulViewAddr = (ULONG)view->getViewAddr();
725
726 // if ulViewAddr is > address, we've exhausted
727 // the sorted list already and can abort search.
728 if(ulViewAddr <= address)
729 {
730 if(ulViewAddr + view->getSize() > address &&
731 view->getAccessFlags() >= accessType)
732 {
733 *offset = view->getOffset() + (address - ulViewAddr);
734 goto success;
735 }
736
737 // Not found yet, continue search with next map
738 view = view->next;
739 }
740 else
741 {
742 // list is exhausted, abort loop
743 view = NULL;
744 }
745 }
746 while(view);
747
748 //failure if we get here
749 view = NULL;
750 }
751
752success:
753#ifdef DEBUG
754 if(view && !view->getParentMap()->isImageMap())
755 dprintf(("findMapByView %x %x -> %x off %x",
756 address,
757 accessType,
758 view->getViewAddr(),
759 *offset));
760#endif
761
762 globalviewMutex.leave();
763
764 if(pView)
765 *pView = view;
766
767 return (view) ? view->getParentMap() : NULL;
768}
769//******************************************************************************
770//******************************************************************************
771Win32MemMapView *Win32MemMapView::findView(LPVOID address)
772{
773 Win32MemMapView *view = mapviews;
774
775 globalviewMutex.enter();
776 if(view != NULL) {
777 while(view) {
778 if(view->getViewAddr() == address)
779 {
780 break;
781 }
782 view = view->next;
783 }
784 }
785 globalviewMutex.leave();
786 return view;
787}
788//******************************************************************************
789//******************************************************************************
790
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