src/libcaptive/cc/sharedcachemap.c

   1 /* $Id$
   2  * reactos Cache Manager (Cc*) SharedCacheMap structure of libcaptive
   3  * Copyright (C) 2003 Jan Kratochvil <project-captive@jankratochvil.net>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; exactly version 2 of June 1991 is required
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19
  20 #include "config.h"
  21
  22 #include "sharedcachemap.h"     /* self */
  23 #include "sharedcachemap-priv.h"        /* self */
  24 #include "io.h"
  25 #include "marshallers.h"
  26 #include <glib-object.h>
  27 #include "privatebcbpin.h"
  28 #include "captive/macros.h"
  29 #include <sys/mman.h>
  30 #include "reactos/ddk/obfuncs.h"
  31 #include <stdlib.h>
  32
  33
  34 static GHashTable *CaptiveSharedCacheMapObject_hash;
  35
  36 static void CaptiveSharedCacheMapObject_hash_init(void)
  37 {
  38         if (CaptiveSharedCacheMapObject_hash)
  39                 return;
  40         CaptiveSharedCacheMapObject_hash=g_hash_table_new(
  41                         g_direct_hash,  /* hash_func */
  42                         g_direct_equal);        /* key_equal_func */
  43 }
  44
  45
  46 static gpointer captive_shared_cache_map_object_parent_class=NULL;
  47
  48
  49 static void captive_shared_cache_map_object_finalize(CaptiveSharedCacheMapObject *captive_shared_cache_map_object)
  50 {
  51 static const CC_FILE_SIZES FileSizes_zero;
  52 gboolean errbool;
  53 guint64 offset;
  54 CaptiveSharedCacheMapObject_page *page;
  55
  56         g_return_if_fail(captive_shared_cache_map_object!=NULL);
  57
  58         for (offset=0;offset<CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE);offset+=PAGE_SIZE) {
  59                 page=captive_shared_cache_map_object->pages+offset/PAGE_SIZE;
  60                 if (!page->data_valid)
  61                         continue;
  62                 g_assert(!page->dirty); /* FIXME: Is it allowed by W32? */
  63                 }
  64
  65         CaptiveSharedCacheMapObject_hash_init();
  66         errbool=g_hash_table_remove(CaptiveSharedCacheMapObject_hash,captive_shared_cache_map_object);
  67         g_assert(errbool==TRUE);
  68
  69         captive_shared_cache_map_FileSizes_set(captive_shared_cache_map_object,&FileSizes_zero);
  70         g_assert(captive_shared_cache_map_object->buffer==NULL);
  71         g_assert(captive_shared_cache_map_object->pages==NULL);
  72
  73         if (captive_shared_cache_map_object->pin_hash) {
  74                 captive_private_bcb_pin_object_hash_destroy(captive_shared_cache_map_object->pin_hash);
  75                 captive_shared_cache_map_object->pin_hash=NULL;
  76                 }
  77         g_assert(captive_shared_cache_map_object->map==NULL);
  78         if (captive_shared_cache_map_object->SectionObjectPointer) {
  79                 g_assert(captive_shared_cache_map_object==captive_shared_cache_map_object->SectionObjectPointer->SharedCacheMap);
  80                 captive_shared_cache_map_object->SectionObjectPointer->SharedCacheMap=NULL;
  81                 }
  82
  83         if (captive_shared_cache_map_object->FileObject) {
  84                 /* W32 dereferences twice. */
  85                 ObDereferenceObject(captive_shared_cache_map_object->FileObject);
  86                 captive_shared_cache_map_object->FileObject=NULL;
  87                 }
  88
  89         G_OBJECT_CLASS(captive_shared_cache_map_object_parent_class)->finalize((GObject *)captive_shared_cache_map_object);
  90 }
  91
  92 static guint FileSizes_changed_signal;
  93 static guint purge_signal;
  94
  95 static void captive_shared_cache_map_object_FileSizes_changed(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
  96                 guint64 AllocationSize,guint64 FileSize,guint64 ValidDataLength);
  97 static void captive_shared_cache_map_object_purge(CaptiveSharedCacheMapObject *captive_shared_cache_map_object);
  98
  99 static void captive_shared_cache_map_object_class_init(CaptiveSharedCacheMapObjectClass *class)
 100 {
 101 GObjectClass *gobject_class=G_OBJECT_CLASS(class);
 102
 103         captive_shared_cache_map_object_parent_class=g_type_class_ref(g_type_parent(G_TYPE_FROM_CLASS(class)));
 104         gobject_class->finalize=(void (*)(GObject *object))captive_shared_cache_map_object_finalize;
 105
 106         class->FileSizes_changed=captive_shared_cache_map_object_FileSizes_changed;
 107         class->purge=captive_shared_cache_map_object_purge;
 108
 109         FileSizes_changed_signal=g_signal_new("FileSizes_changed",
 110                         G_TYPE_FROM_CLASS(gobject_class),
 111                         G_SIGNAL_RUN_LAST,
 112                         G_STRUCT_OFFSET(CaptiveSharedCacheMapObjectClass,FileSizes_changed),
 113                         NULL,NULL,
 114                         captive_cc_VOID__UINT64_UINT64_UINT64,
 115                         G_TYPE_NONE,3,G_TYPE_UINT64,G_TYPE_UINT64,G_TYPE_UINT64);
 116         purge_signal=g_signal_new("purge",
 117                         G_TYPE_FROM_CLASS(gobject_class),
 118                         G_SIGNAL_RUN_LAST,
 119                         G_STRUCT_OFFSET(CaptiveSharedCacheMapObjectClass,purge),
 120                         NULL,NULL,
 121                         captive_cc_VOID__VOID,
 122                         G_TYPE_NONE,0);
 123 }
 124
 125
 126 static void captive_shared_cache_map_object_init(CaptiveSharedCacheMapObject *captive_shared_cache_map_object)
 127 {
 128         captive_shared_cache_map_object->pin_hash=captive_private_bcb_pin_object_hash_new();
 129
 130         captive_shared_cache_map_w32_ref(captive_shared_cache_map_object);
 131         g_object_unref(captive_shared_cache_map_object);        /* ==sink */
 132
 133         CaptiveSharedCacheMapObject_hash_init();
 134         g_hash_table_insert(CaptiveSharedCacheMapObject_hash,
 135                         captive_shared_cache_map_object,captive_shared_cache_map_object);
 136 }
 137
 138
 139 GType captive_shared_cache_map_object_get_type(void)
 140 {
 141 static GType captive_shared_cache_map_object_type=0;
 142
 143         if (!captive_shared_cache_map_object_type) {
 144 static const GTypeInfo captive_shared_cache_map_object_info={
 145                                 sizeof(CaptiveSharedCacheMapObjectClass),
 146                                 NULL,   /* base_init */
 147                                 NULL,   /* base_finalize */
 148                                 (GClassInitFunc)captive_shared_cache_map_object_class_init,
 149                                 NULL,   /* class_finalize */
 150                                 NULL,   /* class_data */
 151                                 sizeof(CaptiveSharedCacheMapObject),
 152                                 5,      /* n_preallocs */
 153                                 (GInstanceInitFunc)captive_shared_cache_map_object_init,
 154                                 };
 155
 156                 captive_shared_cache_map_object_type=g_type_register_static(G_TYPE_OBJECT,
 157                                 "CaptiveSharedCacheMapObject",&captive_shared_cache_map_object_info,0);
 158                 }
 159
 160         return captive_shared_cache_map_object_type;
 161 }
 162
 163 static void captive_shared_cache_map_object_FileSizes_changed(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 164                 guint64 AllocationSize,guint64 FileSize,guint64 ValidDataLength)
 165 {
 166 size_t size_old,size_new;
 167 guint64 size64_old,size64_new;
 168
 169         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 170
 171         g_assert((!captive_shared_cache_map_object->buffer)==(!captive_shared_cache_map_object->AllocationSize));
 172         g_assert((!captive_shared_cache_map_object->pages)==(!captive_shared_cache_map_object->AllocationSize));
 173
 174         size64_old=CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE);
 175         size_old=size64_old;
 176         g_assert(size_old==size64_old);
 177         size64_new=CAPTIVE_ROUND_UP64(AllocationSize,PAGE_SIZE);
 178         size_new=size64_new;
 179         if (size_new!=size64_new) {
 180 size_new_big:
 181                 g_error("Mapped size %" G_GUINT64_FORMAT " is too big; FIXME: non-mmap(2)-able areas not yet supported",size64_new);
 182                 g_assert_not_reached();
 183                 }
 184
 185         if (size_old!=size_new) {
 186                 /* ntfs.sys of NT-5.1sp1 may extend StreamFileObject while dirty pins exist.
 187                  * How to extend SharedCacheMap size without changing the memory location?
 188                  * I hope ntfs.sys does not expect long-term absolute position of its
 189                  * StreamFileObject:
 190                  */
 191                 if (!(captive_shared_cache_map_object->FileObject->Flags&FO_STREAM_FILE)) {
 192                         /* These two assertions should be already catched by pin/map signal handlers. */
 193                         g_assert(!captive_shared_cache_map_object->map);
 194                         g_assert(!g_hash_table_size(captive_shared_cache_map_object->pin_hash));
 195                         }
 196                 }
 197
 198         if (!size_new || size_new > captive_shared_cache_map_object->alloc_length) {
 199 size_t alloc_new;
 200 guint64 alloc64_new;
 201 gpointer buffer_new;
 202
 203                 alloc64_new=CAPTIVE_ROUND_UP64((!size64_new ? 0 : MAX(size64_new*2,0x10000)),PAGE_SIZE);
 204                 alloc_new=alloc64_new;
 205                 if (alloc_new!=alloc64_new)
 206                         goto size_new_big;
 207
 208                 if (!alloc_new)
 209                         buffer_new=NULL;
 210                 else {
 211 gpointer base;
 212 int errint;
 213
 214                         base=mmap(
 215                                         NULL,   /* start */
 216                                         PAGE_SIZE+alloc_new+PAGE_SIZE,  /* length; leading and trailing boundary check pages */
 217                                         PROT_READ|PROT_WRITE,   /* prot; read/write must be possible although write is not guaranteed to be flushed yet */
 218                                         MAP_PRIVATE|MAP_ANONYMOUS       /* flags */
 219                                                         |MAP_NORESERVE, /* At least ext2fsd maps the whole disk. */
 220                                         -1,     /* fd; ignored due to MAP_ANONYMOUS */
 221                                         0);     /* offset; ignored due to MAP_ANONYMOUS */
 222                         if (base==MAP_FAILED)
 223                                 goto size_new_big;
 224                         g_assert(base!=NULL);
 225
 226                         base+=PAGE_SIZE;
 227                         errint=munmap(base-PAGE_SIZE,PAGE_SIZE);        /* unmap leading boundary check page */
 228                         g_assert(errint==0);
 229                         errint=munmap(base+alloc_new,PAGE_SIZE);        /* unmap trailing boundary check page */
 230                         g_assert(errint==0);
 231
 232                         buffer_new=base;
 233                         }
 234
 235                 memcpy(buffer_new,captive_shared_cache_map_object->buffer,
 236                                 MIN(AllocationSize,captive_shared_cache_map_object->AllocationSize));
 237
 238                 if (captive_shared_cache_map_object->alloc_length) {
 239 int errint;
 240
 241                         errint=munmap(captive_shared_cache_map_object->buffer,captive_shared_cache_map_object->alloc_length);
 242                         g_assert(errint==0);
 243                         }
 244
 245                 captive_shared_cache_map_object->buffer=buffer_new;
 246
 247 #if 0   /* It appears it is valid to squeeze out 'dirty' blocks. FIXME: Flush them? */
 248                 /* FIXME: The code may be no longer valid with the 'alloc_new' introduction! */
 249                 if (size_old>size_new) {
 250 guint64 now;
 251
 252                         for (now=size_new;now<size_old;now+=PAGE_SIZE) {
 253                                 if (!captive_shared_cache_map_object->pages[now/PAGE_SIZE].data_valid)
 254                                         continue;
 255                                 g_assert(!captive_shared_cache_map_object->pages[now/PAGE_SIZE].dirty);
 256                                 }
 257                         }
 258 #endif
 259
 260                 captive_shared_cache_map_object->pages=g_realloc(captive_shared_cache_map_object->pages,
 261                                 alloc_new/PAGE_SIZE*sizeof(*captive_shared_cache_map_object->pages));
 262
 263                 captive_shared_cache_map_object->alloc_length=alloc_new;
 264                 }
 265
 266         if (size_new>size_old)  /* prevent 'size_new-size_old' as it is unsigned! */
 267                 memset(captive_shared_cache_map_object->pages+(size_old/PAGE_SIZE),0,
 268                                 (size_new-size_old)/PAGE_SIZE*sizeof(*captive_shared_cache_map_object->pages));
 269
 270         captive_shared_cache_map_object->AllocationSize=AllocationSize;
 271         captive_shared_cache_map_object->FileSize=FileSize;
 272         captive_shared_cache_map_object->ValidDataLength=ValidDataLength;
 273
 274         g_assert((!captive_shared_cache_map_object->buffer)==(!captive_shared_cache_map_object->AllocationSize));
 275         g_assert((!captive_shared_cache_map_object->pages)==(!captive_shared_cache_map_object->AllocationSize));
 276 }
 277
 278 static void captive_shared_cache_map_object_purge(CaptiveSharedCacheMapObject *captive_shared_cache_map_object)
 279 {
 280         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 281
 282         /* NOP; just to provide slot for checking by Bcbs */
 283 }
 284
 285 CaptiveSharedCacheMapObject *captive_shared_cache_map_get_ref(FILE_OBJECT *FileObject,
 286                 const CC_FILE_SIZES *FileSizes,BOOLEAN PinAccess,const CACHE_MANAGER_CALLBACKS *CallBacks,VOID *LazyWriterContext)
 287 {
 288 CaptiveSharedCacheMapObject *captive_shared_cache_map_object;
 289
 290         g_return_val_if_fail(FileObject!=NULL,NULL);
 291         g_return_val_if_fail(FileObject->SectionObjectPointer!=NULL,NULL);
 292         g_return_val_if_fail(FileSizes!=NULL,NULL);
 293         g_return_val_if_fail(CallBacks!=NULL,NULL);
 294
 295         if ((captive_shared_cache_map_object=FileObject->SectionObjectPointer->SharedCacheMap)) {
 296                 captive_shared_cache_map_w32_ref(captive_shared_cache_map_object);
 297                 }
 298         else {
 299                 captive_shared_cache_map_object=g_object_new(
 300                                 CAPTIVE_SHARED_CACHE_MAP_TYPE_OBJECT,   /* object_type */
 301                                 NULL);  /* first_property_name; FIXME: support properties */
 302
 303                 /* FIXME: When to drop SharedCacheMap?
 304                  * Currently we never close it.
 305                  * Fix also CcZeroData() workaround.
 306                  */
 307                 g_object_ref(captive_shared_cache_map_object);
 308
 309                 /* W32 references twice. */
 310                 ObReferenceObject(FileObject);
 311                 captive_shared_cache_map_object->FileObject=FileObject;
 312                 captive_shared_cache_map_object->SectionObjectPointer=FileObject->SectionObjectPointer;
 313                 captive_shared_cache_map_object->AllocationSize=0;
 314                 captive_shared_cache_map_object->FileSize=0;
 315                 captive_shared_cache_map_object->ValidDataLength=0;
 316                 captive_shared_cache_map_object->PinAccess=PinAccess;
 317                 captive_shared_cache_map_object->CallBacks=*CallBacks;
 318                 captive_shared_cache_map_object->LazyWriterContext=LazyWriterContext;
 319
 320                 FileObject->SectionObjectPointer->SharedCacheMap=captive_shared_cache_map_object;
 321                 }
 322
 323         g_assert(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 324         /* FileObject may differ - we can have a different reference to the same FCB. */
 325         g_assert(FileObject->SectionObjectPointer==captive_shared_cache_map_object->SectionObjectPointer);
 326         g_assert(PinAccess==captive_shared_cache_map_object->PinAccess);
 327         g_assert(CallBacks->AcquireForLazyWrite==captive_shared_cache_map_object->CallBacks.AcquireForLazyWrite);
 328         g_assert(CallBacks->ReleaseFromLazyWrite==captive_shared_cache_map_object->CallBacks.ReleaseFromLazyWrite);
 329         g_assert(CallBacks->AcquireForReadAhead==captive_shared_cache_map_object->CallBacks.AcquireForReadAhead);
 330         g_assert(CallBacks->ReleaseFromReadAhead==captive_shared_cache_map_object->CallBacks.ReleaseFromReadAhead);
 331         g_assert(LazyWriterContext==captive_shared_cache_map_object->LazyWriterContext);
 332
 333         captive_shared_cache_map_FileSizes_set(captive_shared_cache_map_object,FileSizes);
 334
 335         return captive_shared_cache_map_object;
 336 }
 337
 338 void captive_shared_cache_map_FileSizes_set(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 339                 const CC_FILE_SIZES *FileSizes)
 340 {
 341 guint64 AllocationSize,FileSize,ValidDataLength;
 342
 343         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 344         g_return_if_fail(FileSizes!=NULL);
 345
 346         AllocationSize=FileSizes->AllocationSize.QuadPart;
 347         FileSize=FileSizes->FileSize.QuadPart;
 348         ValidDataLength=FileSizes->ValidDataLength.QuadPart;
 349
 350         /* Do not: if (ValidDataLength==G_MAXINT64)
 351          *              ValidDataLength=FileSize;
 352          * In some cases (during NTFS mount) there may be also invalid 'ValidDataLength' at all:
 353          *      CcSetFileSizes(AllocationSize=0x1000000,FileSize=0xf80208,ValidDataLength=0x23b801a0)
 354          */
 355         ValidDataLength=FileSize;
 356
 357         g_assert(AllocationSize>=0);
 358         g_assert(FileSize>=0);
 359         g_assert(ValidDataLength>=0);
 360
 361         g_assert(ValidDataLength<=FileSize);
 362         /* Do not: g_assert(0==(AllocationSize%0x200));
 363          * as it is true for ntfs.sys of NT-5.1sp1 but it fails for fastfat.sys of NT-5.1sp1.
 364          */
 365         /* AllocationSize can be much higher: */
 366         g_assert(FileSize<=AllocationSize);
 367
 368         /* Prevent signalling if not needed. */
 369         if (0
 370                         || captive_shared_cache_map_object->AllocationSize!=AllocationSize
 371                         || captive_shared_cache_map_object->FileSize!=FileSize
 372                         || captive_shared_cache_map_object->ValidDataLength!=ValidDataLength) {
 373                 /* Signalling is forbidden in captive_shared_cache_map_object_finalize(). */
 374                 if (G_OBJECT(captive_shared_cache_map_object)->ref_count==0) {
 375                         (*CAPTIVE_SHARED_CACHE_MAP_OBJECT_GET_CLASS(captive_shared_cache_map_object)->FileSizes_changed)
 376                                         (captive_shared_cache_map_object,AllocationSize,FileSize,ValidDataLength);
 377                         }
 378                 else {
 379                                 g_signal_emit(captive_shared_cache_map_object,FileSizes_changed_signal,0,
 380                                                 AllocationSize,FileSize,ValidDataLength);
 381                         }
 382                 }
 383
 384         g_assert(captive_shared_cache_map_object->AllocationSize==AllocationSize);
 385         g_assert(captive_shared_cache_map_object->FileSize==FileSize);
 386         g_assert(captive_shared_cache_map_object->ValidDataLength==ValidDataLength);
 387 }
 388
 389 CaptiveSharedCacheMapObject *captive_SectionObjectPointers_to_SharedCacheMap(SECTION_OBJECT_POINTERS *SectionObjectPointers)
 390 {
 391         g_return_val_if_fail(SectionObjectPointers!=NULL,NULL);
 392         g_return_val_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(SectionObjectPointers->SharedCacheMap),NULL);
 393
 394         return SectionObjectPointers->SharedCacheMap;
 395 }
 396
 397 CaptiveSharedCacheMapObject *captive_FileObject_to_SharedCacheMap(FILE_OBJECT *FileObject)
 398 {
 399         g_return_val_if_fail(FileObject!=NULL,NULL);
 400
 401         return captive_SectionObjectPointers_to_SharedCacheMap(FileObject->SectionObjectPointer);
 402 }
 403
 404 void captive_shared_cache_map_w32_ref(CaptiveSharedCacheMapObject *captive_shared_cache_map_object)
 405 {
 406         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 407
 408         g_object_ref(captive_shared_cache_map_object);
 409         captive_shared_cache_map_object->w32_ref_count++;
 410 }
 411
 412 void captive_shared_cache_map_w32_unref(CaptiveSharedCacheMapObject *captive_shared_cache_map_object)
 413 {
 414         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 415         g_return_if_fail(G_OBJECT(captive_shared_cache_map_object)->ref_count>0);
 416
 417         captive_shared_cache_map_object->w32_ref_count--;
 418         g_object_unref(captive_shared_cache_map_object);
 419 }
 420
 421 gint captive_shared_cache_map_query_w32_ref(CaptiveSharedCacheMapObject *captive_shared_cache_map_object)
 422 {
 423         g_return_val_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object),0);
 424
 425         return captive_shared_cache_map_object->w32_ref_count;
 426 }
 427
 428 void captive_shared_cache_map_data_validate_read(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 429                 FILE_OBJECT *FileObject,guint64 start,guint64 end)
 430 {
 431 guint64 now;
 432 gboolean after_eof=FALSE;       /* Did we reached the end of file already? */
 433
 434         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 435         g_return_if_fail(captive_shared_cache_map_object==captive_FileObject_to_SharedCacheMap(FileObject));
 436         g_return_if_fail(start<=end);
 437         g_return_if_fail(end<=CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
 438
 439         start=CAPTIVE_ROUND_DOWN64(start,PAGE_SIZE);
 440         end=CAPTIVE_ROUND_UP64(end,PAGE_SIZE);
 441
 442         for (now=start;now<end;now+=PAGE_SIZE) {
 443 LARGE_INTEGER now_LargeInteger;
 444 ULONG got;
 445
 446                 if (captive_shared_cache_map_object->pages[now/PAGE_SIZE].data_valid)
 447                         continue;
 448                 now_LargeInteger.QuadPart=now;
 449                 got=captive_Cc_IoPageRead(FileObject,captive_shared_cache_map_object->buffer+now,PAGE_SIZE,&now_LargeInteger);
 450                 if (after_eof)
 451                         g_assert(got==0);
 452                 else
 453                         g_assert(got<=PAGE_SIZE);
 454                 after_eof=(got<PAGE_SIZE);
 455                 captive_shared_cache_map_object->pages[now/PAGE_SIZE].data_valid=TRUE;
 456                 captive_shared_cache_map_object->pages[now/PAGE_SIZE].dirty=FALSE;
 457                 }
 458 }
 459
 460 void captive_shared_cache_map_data_validate_noread(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 461                 guint64 start,guint64 end)
 462 {
 463 guint64 now;
 464
 465         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 466         g_return_if_fail(start<=end);
 467         g_return_if_fail(end<=CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
 468
 469         start=CAPTIVE_ROUND_DOWN64(start,PAGE_SIZE);
 470         end=CAPTIVE_ROUND_UP64(end,PAGE_SIZE);
 471
 472         for (now=start;now<end;now+=PAGE_SIZE) {
 473                 g_assert(captive_shared_cache_map_object->pages[now/PAGE_SIZE].data_valid);
 474                 }
 475 }
 476
 477 void captive_shared_cache_map_set_data_valid(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 478                 guint64 start,guint64 end)
 479 {
 480 guint64 now;
 481
 482         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 483         g_return_if_fail(start<=end);
 484         g_return_if_fail(end<=CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
 485
 486         start=CAPTIVE_ROUND_UP64(start,PAGE_SIZE);
 487         if (end<captive_shared_cache_map_object->FileSize)
 488                 end=CAPTIVE_ROUND_DOWN64(end,PAGE_SIZE);
 489         else {
 490                 /* We can validate the last page of the file
 491                  * even if it does not end on PAGE_SIZE boundary.
 492                  */
 493                 end=CAPTIVE_ROUND_UP64(end,PAGE_SIZE);
 494                 }
 495         /* We may get end<start here - it is valid to not to validate anything. */
 496
 497         for (now=start;now<end;now+=PAGE_SIZE) {
 498                 captive_shared_cache_map_object->pages[now/PAGE_SIZE].data_valid=TRUE;
 499                 /* .dirty is undefined */
 500                 }
 501 }
 502
 503 void captive_shared_cache_map_set_data_invalid(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 504                 guint64 start,guint64 end)
 505 {
 506 guint64 now;
 507
 508         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 509         g_return_if_fail(start<=end);
 510         g_return_if_fail(end<=CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
 511
 512         start=CAPTIVE_ROUND_DOWN64(start,PAGE_SIZE);
 513         end=CAPTIVE_ROUND_UP64(end,PAGE_SIZE);
 514
 515         for (now=start;now<end;now+=PAGE_SIZE) {
 516                 captive_shared_cache_map_object->pages[now/PAGE_SIZE].data_valid=FALSE;
 517                 }
 518 }
 519
 520 void captive_shared_cache_map_set_dirty(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 521                 guint64 start,guint64 end)
 522 {
 523 guint64 now;
 524 CaptiveSharedCacheMapObject_page *page;
 525
 526         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 527         g_return_if_fail(end<=CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
 528
 529         start=CAPTIVE_ROUND_DOWN64(start,PAGE_SIZE);
 530         end=CAPTIVE_ROUND_UP64(end,PAGE_SIZE);
 531
 532         for (now=start;now<end;now+=PAGE_SIZE) {
 533                 page=captive_shared_cache_map_object->pages+now/PAGE_SIZE;
 534                 g_assert(page->data_valid);
 535                 if (!page->dirty) {
 536                         page->dirty=TRUE;
 537                         page->lsn_oldest=0;
 538                         page->lsn_newest=0;
 539                         }
 540                 }
 541 }
 542
 543 gboolean captive_shared_cache_map_is_page_dirty(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 544                 guint64 offset)
 545 {
 546 CaptiveSharedCacheMapObject_page *page;
 547
 548         g_return_val_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object),FALSE);
 549         g_return_val_if_fail(offset<CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE),FALSE);
 550         g_return_val_if_fail(0==CAPTIVE_ROUND_DOWN_EXCEEDING64(offset,PAGE_SIZE),FALSE);
 551         page=captive_shared_cache_map_object->pages+offset/PAGE_SIZE;
 552         g_return_val_if_fail(page->data_valid,FALSE);
 553
 554         return page->dirty;
 555 }
 556
 557 void captive_shared_cache_map_page_set_lsn(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 558                 guint64 offset,gint64 lsn)
 559 {
 560 CaptiveSharedCacheMapObject_page *page;
 561
 562         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 563         g_return_if_fail(offset<=CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
 564         g_return_if_fail(0==CAPTIVE_ROUND_DOWN_EXCEEDING64(offset,PAGE_SIZE));
 565         page=captive_shared_cache_map_object->pages+offset/PAGE_SIZE;
 566         g_return_if_fail(page->data_valid);
 567         g_return_if_fail(page->dirty);
 568         g_return_if_fail(page->lsn_oldest<=page->lsn_newest);
 569         g_return_if_fail(!page->lsn_newest || lsn>=page->lsn_newest);
 570         g_return_if_fail(captive_shared_cache_map_object->LogHandle_set);
 571         g_return_if_fail(captive_shared_cache_map_object->FlushToLsnRoutine_set);
 572
 573         if (!page->lsn_oldest)
 574                 page->lsn_oldest=lsn;
 575         page->lsn_newest=lsn;
 576 }
 577
 578 void captive_shared_cache_map_purge(CaptiveSharedCacheMapObject *captive_shared_cache_map_object)
 579 {
 580 guint64 offset;
 581 CaptiveSharedCacheMapObject_page *page;
 582
 583         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 584
 585         g_signal_emit(captive_shared_cache_map_object,purge_signal,0);
 586
 587         /* Needed by fastfat.sys of NT-5.1sp1 during FAT32 unmount
 588          * otherwise it fails on: g_assert(!page->dirty);
 589          * It corrupts the disk if the buffer is dropped instead.
 590          */
 591         captive_shared_cache_map_flush(captive_shared_cache_map_object,
 592                         0,CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
 593
 594         for (offset=0;offset<CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE);offset+=PAGE_SIZE) {
 595                 page=captive_shared_cache_map_object->pages+offset/PAGE_SIZE;
 596                 if (!page->data_valid)
 597                         continue;
 598                 g_assert(!page->dirty);
 599                 page->data_valid=FALSE;
 600                 }
 601 }
 602
 603 static VOID *captive_LogHandle;
 604 static PFLUSH_TO_LSN captive_FlushToLsnRoutine;
 605
 606 void captive_shared_cache_map_set_LogHandle(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,VOID *LogHandle)
 607 {
 608         g_return_if_fail(!captive_shared_cache_map_object || CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 609         /* FIXME: 'captive_shared_cache_map_object->LogHandle_set' may be set.
 610          * Does it mean 'LogHandle_set' is 'FileObject'-based instead of 'SharedCacheMap'-based?
 611          */
 612
 613         if (!LogHandle)
 614                 return;
 615         g_assert(!captive_LogHandle || captive_LogHandle==LogHandle);
 616         captive_LogHandle=LogHandle;
 617         if (LogHandle && captive_shared_cache_map_object)
 618                 captive_shared_cache_map_object->LogHandle_set=TRUE;
 619 }
 620
 621 void captive_shared_cache_map_set_FlushToLsnRoutine
 622                 (CaptiveSharedCacheMapObject *captive_shared_cache_map_object,PFLUSH_TO_LSN FlushToLsnRoutine)
 623 {
 624         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 625         /* FIXME: 'captive_shared_cache_map_object->FlushToLsnRoutine_set' may be set.
 626          * Does it mean 'FlushToLsnRoutine_set' is 'FileObject'-based instead of 'SharedCacheMap'-based?
 627          */
 628
 629         if (!FlushToLsnRoutine)
 630                 return;
 631         g_assert(!captive_FlushToLsnRoutine || captive_FlushToLsnRoutine==FlushToLsnRoutine);
 632         captive_FlushToLsnRoutine=FlushToLsnRoutine;
 633         if (FlushToLsnRoutine)
 634                 captive_shared_cache_map_object->FlushToLsnRoutine_set=TRUE;
 635 }
 636
 637 static void captive_shared_cache_map_page_write(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 638                 guint64 offset)
 639 {
 640 LARGE_INTEGER offset_LargeInteger;
 641 static gint64 lsn_last;
 642 CaptiveSharedCacheMapObject_page *page;
 643
 644         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 645         g_return_if_fail(captive_shared_cache_map_object->FileObject!=NULL);
 646         g_return_if_fail(offset<=CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
 647         g_return_if_fail(0==CAPTIVE_ROUND_DOWN_EXCEEDING64(offset,PAGE_SIZE));
 648         page=captive_shared_cache_map_object->pages+offset/PAGE_SIZE;
 649         g_return_if_fail(page->data_valid);
 650         g_return_if_fail(page->dirty);
 651
 652         if (page->lsn_newest) {
 653                 /* sanity check */
 654                 g_assert(!lsn_last || lsn_last<=page->lsn_newest);
 655                 lsn_last=page->lsn_newest;
 656
 657                 captive_stdcall_call_12((CaptiveStdCallFunc12)captive_FlushToLsnRoutine,
 658                                 captive_LogHandle,
 659                                 (gpointer)(guint32)(page->lsn_newest>> 0U),     /* 'LARGE_INTEGER' argument */
 660                                 (gpointer)(guint32)(page->lsn_newest>>32U));
 661                 }
 662
 663         offset_LargeInteger.QuadPart=offset;
 664         captive_Cc_IoPageWrite(captive_shared_cache_map_object->FileObject,
 665                         captive_shared_cache_map_object->buffer+offset,PAGE_SIZE,&offset_LargeInteger);
 666
 667         page->dirty=FALSE;
 668         page->lsn_oldest=0;
 669         page->lsn_newest=0;
 670 }
 671
 672 typedef struct _captive_shared_cache_map_flush_lsn_sort captive_shared_cache_map_flush_lsn_sort;
 673 struct _captive_shared_cache_map_flush_lsn_sort {
 674         gint64 lsn;
 675         CaptiveSharedCacheMapObject *captive_shared_cache_map_object;
 676         guint64 offset;
 677         };
 678
 679 typedef struct _captive_shared_cache_map_flush_lsn_pages_foreach_param
 680                 captive_shared_cache_map_flush_lsn_pages_foreach_param;
 681 struct _captive_shared_cache_map_flush_lsn_pages_foreach_param {
 682         gint64 lsn_target;
 683         guint lsn_pages_count;
 684         captive_shared_cache_map_flush_lsn_sort *lsn_pages_pointer;     /* Not filled in if NULL */
 685         };
 686
 687 static void captive_shared_cache_map_flush_lsn_pages_foreach(
 688                 CaptiveSharedCacheMapObject *captive_shared_cache_map_object,  /* key */
 689                 CaptiveSharedCacheMapObject *captive_shared_cache_map_object_value,  /* value */
 690                 captive_shared_cache_map_flush_lsn_pages_foreach_param *param)  /* user_data */
 691 {
 692 guint64 now;
 693 CaptiveSharedCacheMapObject_page *page;
 694
 695 #if 0   /* acceleration */
 696         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 697         g_return_if_fail(captive_shared_cache_map_object==captive_shared_cache_map_object_value);
 698         g_return_if_fail(param!=NULL);
 699 #endif
 700
 701         for (now=0;now<captive_shared_cache_map_object->AllocationSize;now+=PAGE_SIZE) {
 702                 page=captive_shared_cache_map_object->pages+now/PAGE_SIZE;
 703                 if (!page->data_valid)
 704                         continue;
 705                 if (!page->dirty)
 706                         continue;
 707                 if (!page->lsn_newest)
 708                         continue;
 709                 if (page->lsn_newest>param->lsn_target)
 710                         continue;
 711                 param->lsn_pages_count++;
 712                 if (!param->lsn_pages_pointer)
 713                         continue;
 714                 param->lsn_pages_pointer->lsn=page->lsn_newest;
 715                 param->lsn_pages_pointer->captive_shared_cache_map_object=captive_shared_cache_map_object;
 716                 param->lsn_pages_pointer->offset=now;
 717                 param->lsn_pages_pointer++;
 718                 }
 719 }
 720
 721 static int captive_shared_cache_map_flush_lsn_pages_compar
 722                 (const captive_shared_cache_map_flush_lsn_sort *a,const captive_shared_cache_map_flush_lsn_sort *b)
 723 {
 724 #if 0   /* acceleration */
 725         g_return_val_if_fail(a!=NULL,0);
 726         g_return_val_if_fail(b!=NULL,0);
 727 #endif
 728
 729         return (a->lsn>b->lsn)-(b->lsn>a->lsn);
 730 }
 731
 732 guint64 captive_shared_cache_map_flush(CaptiveSharedCacheMapObject *captive_shared_cache_map_object,
 733                 guint64 start,guint64 end)
 734 {
 735 guint64 flushed;
 736 guint64 now;
 737 gint64 lsn_target;
 738 captive_shared_cache_map_flush_lsn_pages_foreach_param lsn_pages_foreach_param;
 739 captive_shared_cache_map_flush_lsn_sort *lsn_pages_pointer;
 740 const captive_shared_cache_map_flush_lsn_sort *lsn_page;
 741 guint lsn_pages_count;
 742
 743         g_return_val_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object),0);
 744         g_return_val_if_fail(start<=end,0);
 745
 746         end=MIN(end,CAPTIVE_ROUND_UP64(captive_shared_cache_map_object->AllocationSize,PAGE_SIZE));
 747
 748         start=CAPTIVE_ROUND_DOWN64(start,PAGE_SIZE);
 749         end=CAPTIVE_ROUND_UP64(end,PAGE_SIZE);
 750
 751         lsn_target=0;
 752         for (now=start;now<end;now+=PAGE_SIZE) {
 753 CaptiveSharedCacheMapObject_page *page;
 754
 755                 page=captive_shared_cache_map_object->pages+now/PAGE_SIZE;
 756                 if (!page->data_valid)
 757                         continue;
 758                 if (!page->dirty)
 759                         continue;
 760                 if (!page->lsn_newest)
 761                         continue;
 762                 if (!lsn_target || lsn_target<page->lsn_newest)
 763                         lsn_target=page->lsn_newest;
 764                 }
 765
 766         lsn_pages_foreach_param.lsn_target=lsn_target;
 767         lsn_pages_foreach_param.lsn_pages_count=0;
 768         lsn_pages_foreach_param.lsn_pages_pointer=NULL; /* Not yet filling */
 769         g_hash_table_foreach(
 770                         CaptiveSharedCacheMapObject_hash,       /* hash_table */
 771                         (GHFunc)captive_shared_cache_map_flush_lsn_pages_foreach,       /* func */
 772                         &lsn_pages_foreach_param);      /* user_data */
 773
 774         lsn_pages_count=lsn_pages_foreach_param.lsn_pages_count;
 775         captive_newn(lsn_pages_pointer,lsn_pages_count);
 776         g_assert(lsn_pages_foreach_param.lsn_target==lsn_target);
 777         lsn_pages_foreach_param.lsn_pages_count=0;
 778         lsn_pages_foreach_param.lsn_pages_pointer=lsn_pages_pointer;
 779         g_hash_table_foreach(
 780                         CaptiveSharedCacheMapObject_hash,       /* hash_table */
 781                         (GHFunc)captive_shared_cache_map_flush_lsn_pages_foreach,       /* func */
 782                         &lsn_pages_foreach_param);      /* user_data */
 783
 784         g_assert(lsn_pages_foreach_param.lsn_target==lsn_target);
 785         g_assert(lsn_pages_foreach_param.lsn_pages_count==lsn_pages_count);
 786         g_assert(lsn_pages_foreach_param.lsn_pages_pointer==lsn_pages_pointer+lsn_pages_count);
 787
 788         qsort(lsn_pages_pointer,lsn_pages_count,sizeof(*lsn_pages_pointer),
 789                         (int (*)(const void *,const void *))captive_shared_cache_map_flush_lsn_pages_compar);
 790
 791         flushed=0;
 792
 793         for (lsn_page=lsn_pages_pointer;lsn_page<lsn_pages_pointer+lsn_pages_count;lsn_page++) {
 794                 captive_shared_cache_map_page_write(lsn_page->captive_shared_cache_map_object,lsn_page->offset);
 795                 if (lsn_page->captive_shared_cache_map_object==captive_shared_cache_map_object
 796                                 && lsn_page->offset>=start && lsn_page->offset<end)
 797                 flushed+=PAGE_SIZE;
 798                 }
 799
 800         g_free(lsn_pages_pointer);
 801
 802         for (now=start;now<end;now+=PAGE_SIZE) {
 803 CaptiveSharedCacheMapObject_page *page;
 804
 805                 page=captive_shared_cache_map_object->pages+now/PAGE_SIZE;
 806                 if (!page->data_valid)
 807                         continue;
 808                 if (!page->dirty)
 809                         continue;
 810                 captive_shared_cache_map_page_write(captive_shared_cache_map_object,now);
 811                 flushed+=PAGE_SIZE;
 812                 }
 813
 814         /* We were calling W32 code - recheck our task completion. */
 815         for (now=start;now<end;now+=PAGE_SIZE) {
 816 CaptiveSharedCacheMapObject_page *page;
 817
 818                 page=captive_shared_cache_map_object->pages+now/PAGE_SIZE;
 819                 if (!page->data_valid)
 820                         continue;
 821                 g_assert(!page->dirty);
 822                 }
 823
 824         return flushed;
 825 }
 826
 827 static void captive_shared_cache_map_is_any_dirty_foreach(
 828                 CaptiveSharedCacheMapObject *captive_shared_cache_map_object,  /* key */
 829                 CaptiveSharedCacheMapObject *captive_shared_cache_map_object_value,  /* value */
 830                 gboolean *dirty_foundp) /* user_data */
 831 {
 832 guint64 now;
 833
 834         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 835         g_return_if_fail(captive_shared_cache_map_object==captive_shared_cache_map_object_value);
 836         g_return_if_fail(dirty_foundp!=NULL);
 837
 838         for (now=0;now<captive_shared_cache_map_object->AllocationSize;now+=PAGE_SIZE) {
 839 CaptiveSharedCacheMapObject_page *page;
 840
 841                 page=captive_shared_cache_map_object->pages+now/PAGE_SIZE;
 842                 if (!page->data_valid)
 843                         continue;
 844                 if (!page->dirty)
 845                         continue;
 846                 *dirty_foundp=TRUE;     /* FIXME: stop the traversal. */
 847                 break;
 848                 }
 849 }
 850
 851
 852 gboolean captive_shared_cache_map_is_any_dirty(void)
 853 {
 854 gboolean dirty_found;
 855
 856         CaptiveSharedCacheMapObject_hash_init();
 857         dirty_found=FALSE;
 858         g_hash_table_foreach(
 859                         CaptiveSharedCacheMapObject_hash,       /* hash_table */
 860                         (GHFunc)captive_shared_cache_map_is_any_dirty_foreach,  /* func */
 861                         &dirty_found);  /* user_data */
 862
 863         return dirty_found;
 864 }
 865
 866
 867 typedef struct _captive_shared_cache_map_CcGetDirtyPages_foreach_param captive_shared_cache_map_CcGetDirtyPages_foreach_param;
 868 struct _captive_shared_cache_map_CcGetDirtyPages_foreach_param {
 869         PDIRTY_PAGE_ROUTINE DirtyPageRoutine;
 870         VOID *Context1;
 871         VOID *Context2;
 872         gint64 result;
 873         };
 874
 875 static void captive_shared_cache_map_CcGetDirtyPages_foreach(
 876                 CaptiveSharedCacheMapObject *captive_shared_cache_map_object,  /* key */
 877                 CaptiveSharedCacheMapObject *captive_shared_cache_map_object_value,  /* value */
 878                 captive_shared_cache_map_CcGetDirtyPages_foreach_param *param)  /* user_data */
 879 {
 880 gint64 now;
 881 CaptiveSharedCacheMapObject_page *page;
 882
 883         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 884         g_return_if_fail(captive_shared_cache_map_object->FileObject!=NULL);
 885         g_return_if_fail(captive_shared_cache_map_object==captive_shared_cache_map_object_value);
 886         g_return_if_fail(param!=NULL);
 887
 888         for (now=CAPTIVE_ROUND_DOWN64(captive_shared_cache_map_object->AllocationSize-1,PAGE_SIZE);now>=0;now-=PAGE_SIZE) {
 889 LARGE_INTEGER now_LargeInteger,lsn_oldest_LargeInteger,lsn_newest_LargeInteger;
 890
 891                 page=captive_shared_cache_map_object->pages+now/PAGE_SIZE;
 892                 if (!page->data_valid)
 893                         continue;
 894                 if (!page->dirty)
 895                         continue;
 896                 if (page->lsn_oldest && (!param->result || param->result>page->lsn_oldest))
 897                         param->result=page->lsn_oldest;
 898
 899                 now_LargeInteger.QuadPart=now;
 900                 lsn_oldest_LargeInteger.QuadPart=page->lsn_oldest;
 901                 lsn_newest_LargeInteger.QuadPart=page->lsn_newest;
 902                 (*param->DirtyPageRoutine)(
 903                                 captive_shared_cache_map_object->FileObject,    /* FileObject */
 904                                 &now_LargeInteger,      /* FileOffset */
 905                                 PAGE_SIZE,      /* Length */
 906                                 &lsn_oldest_LargeInteger,       /* OldestLsn */
 907                                 &lsn_newest_LargeInteger,       /* NewestLsn */
 908                                 param->Context1,        /* Context1 */
 909                                 param->Context2);       /* Context2 */
 910                 }
 911 }
 912
 913 gint64 captive_shared_cache_map_CcGetDirtyPages(PDIRTY_PAGE_ROUTINE DirtyPageRoutine,VOID *Context1,VOID *Context2)
 914 {
 915 captive_shared_cache_map_CcGetDirtyPages_foreach_param param;
 916
 917         g_return_val_if_fail(DirtyPageRoutine!=NULL,0);
 918
 919         param.DirtyPageRoutine=DirtyPageRoutine;
 920         param.Context1=Context1;
 921         param.Context2=Context2;
 922         param.result=0;
 923
 924         CaptiveSharedCacheMapObject_hash_init();
 925         g_hash_table_foreach(
 926                         CaptiveSharedCacheMapObject_hash,       /* hash_table */
 927                         (GHFunc)captive_shared_cache_map_CcGetDirtyPages_foreach,       /* func */
 928                         &param);        /* user_data */
 929
 930         return param.result;
 931 }
 932
 933 gpointer captive_shared_cache_map_get_buffer(CaptiveSharedCacheMapObject *captive_shared_cache_map_object)
 934 {
 935         g_return_val_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object),NULL);
 936         g_return_val_if_fail(captive_shared_cache_map_object->buffer!=NULL,NULL);
 937
 938         return captive_shared_cache_map_object->buffer;
 939 }
 940
 941 static void captive_cc_FileObject_delete_foreach(
 942                 CaptiveSharedCacheMapObject *captive_shared_cache_map_object,  /* key */
 943                 CaptiveSharedCacheMapObject *captive_shared_cache_map_object_value,  /* value */
 944                 FILE_OBJECT *FileObject)        /* user_data */
 945 {
 946         g_return_if_fail(CAPTIVE_SHARED_CACHE_MAP_IS_OBJECT(captive_shared_cache_map_object));
 947         g_return_if_fail(captive_shared_cache_map_object==captive_shared_cache_map_object_value);
 948         g_return_if_fail(FileObject!=NULL);
 949
 950         g_assert(FileObject!=captive_shared_cache_map_object->FileObject);
 951 }
 952
 953 BOOLEAN captive_cc_FileObject_delete(FILE_OBJECT *FileObject)
 954 {
 955         g_return_val_if_fail(FileObject!=NULL,FALSE);
 956
 957         CaptiveSharedCacheMapObject_hash_init();
 958         g_hash_table_foreach(
 959                         CaptiveSharedCacheMapObject_hash,       /* hash_table */
 960                         (GHFunc)captive_cc_FileObject_delete_foreach,   /* func */
 961                         FileObject);    /* user_data */
 962
 963         return FALSE;   /* FIXME: remove useless return code. */
 964 }