dlls/kernel/heap.c

   1 /*
   2  * Win32 heap functions
   3  *
   4  * Copyright 1995, 1996 Alexandre Julliard
   5  * Copyright 1996 Huw Davies
   6  * Copyright 1998 Ulrich Weigand
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <assert.h>
  27 #include <stdlib.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <sys/types.h>
  32 #include <time.h>
  33 #ifdef HAVE_SYS_PARAM_H
  34 #include <sys/param.h>
  35 #endif
  36 #ifdef HAVE_SYS_SYSCTL_H
  37 #include <sys/sysctl.h>
  38 #endif
  39 #ifdef HAVE_UNISTD_H
  40 # include <unistd.h>
  41 #endif
  42
  43 #ifdef sun
  44 /* FIXME:  Unfortunately swapctl can't be used with largefile.... */
  45 # undef _FILE_OFFSET_BITS
  46 # define _FILE_OFFSET_BITS 32
  47 # include <sys/resource.h>
  48 # ifdef HAVE_SYS_STAT_H
  49 #  include <sys/stat.h>
  50 # endif
  51 # include <sys/swap.h>
  52 #endif
  53
  54
  55 #include "windef.h"
  56 #include "winbase.h"
  57 #include "winerror.h"
  58 #include "winnt.h"
  59 #include "winternl.h"
  60 #include "excpt.h"
  61 #include "wine/exception.h"
  62 #include "wine/debug.h"
  63
  64 WINE_DEFAULT_DEBUG_CHANNEL(heap);
  65
  66 /* address where we try to map the system heap */
  67 #define SYSTEM_HEAP_BASE  ((void*)0x80000000)
  68 #define SYSTEM_HEAP_SIZE  0x1000000   /* Default heap size = 16Mb */
  69
  70 static HANDLE systemHeap;   /* globally shared heap */
  71
  72
  73 /***********************************************************************
  74  *           HEAP_CreateSystemHeap
  75  *
  76  * Create the system heap.
  77  */
  78 inline static HANDLE HEAP_CreateSystemHeap(void)
  79 {
  80     int created;
  81     void *base;
  82     HANDLE map, event;
  83
  84     /* create the system heap event first */
  85     event = CreateEventA( NULL, TRUE, FALSE, "__wine_system_heap_event" );
  86
  87     if (!(map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE,
  88                                     0, SYSTEM_HEAP_SIZE, "__wine_system_heap" ))) return 0;
  89     created = (GetLastError() != ERROR_ALREADY_EXISTS);
  90
  91     if (!(base = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, SYSTEM_HEAP_BASE )))
  92     {
  93         /* pre-defined address not available */
  94         ERR( "system heap base address %p not available\n", SYSTEM_HEAP_BASE );
  95         return 0;
  96     }
  97
  98     if (created)  /* newly created heap */
  99     {
 100         systemHeap = RtlCreateHeap( HEAP_SHARED, base, SYSTEM_HEAP_SIZE,
 101                                     SYSTEM_HEAP_SIZE, NULL, NULL );
 102         SetEvent( event );
 103     }
 104     else
 105     {
 106         /* wait for the heap to be initialized */
 107         WaitForSingleObject( event, INFINITE );
 108         systemHeap = (HANDLE)base;
 109     }
 110     CloseHandle( map );
 111     return systemHeap;
 112 }
 113
 114
 115 /***********************************************************************
 116  *           HeapCreate   (KERNEL32.@)
 117  *
 118  * Create a heap object.
 119  *
 120  * RETURNS
 121  *      Handle of heap: Success
 122  *      NULL: Failure
 123  */
 124 HANDLE WINAPI HeapCreate(
 125                 DWORD flags,       /* [in] Heap allocation flag */
 126                 SIZE_T initialSize, /* [in] Initial heap size */
 127                 SIZE_T maxSize      /* [in] Maximum heap size */
 128 ) {
 129     HANDLE ret;
 130
 131     if ( flags & HEAP_SHARED )
 132     {
 133         if (!systemHeap) HEAP_CreateSystemHeap();
 134         else WARN( "Shared Heap requested, returning system heap.\n" );
 135         ret = systemHeap;
 136     }
 137     else
 138     {
 139         ret = RtlCreateHeap( flags, NULL, maxSize, initialSize, NULL, NULL );
 140         if (!ret) SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 141     }
 142     return ret;
 143 }
 144
 145
 146 /***********************************************************************
 147  *           HeapDestroy   (KERNEL32.@)
 148  *
 149  * Destroy a heap object.
 150  *
 151  * RETURNS
 152  *      TRUE: Success
 153  *      FALSE: Failure
 154  */
 155 BOOL WINAPI HeapDestroy( HANDLE heap /* [in] Handle of heap */ )
 156 {
 157     if (heap == systemHeap)
 158     {
 159         WARN( "attempt to destroy system heap, returning TRUE!\n" );
 160         return TRUE;
 161     }
 162     if (!RtlDestroyHeap( heap )) return TRUE;
 163     SetLastError( ERROR_INVALID_HANDLE );
 164     return FALSE;
 165 }
 166
 167
 168 /***********************************************************************
 169  *           HeapCompact   (KERNEL32.@)
 170  */
 171 SIZE_T WINAPI HeapCompact( HANDLE heap, DWORD flags )
 172 {
 173     return RtlCompactHeap( heap, flags );
 174 }
 175
 176
 177 /***********************************************************************
 178  *           HeapValidate   (KERNEL32.@)
 179  * Validates a specified heap.
 180  *
 181  * NOTES
 182  *      Flags is ignored.
 183  *
 184  * RETURNS
 185  *      TRUE: Success
 186  *      FALSE: Failure
 187  */
 188 BOOL WINAPI HeapValidate(
 189               HANDLE heap, /* [in] Handle to the heap */
 190               DWORD flags,   /* [in] Bit flags that control access during operation */
 191               LPCVOID block  /* [in] Optional pointer to memory block to validate */
 192 ) {
 193     return RtlValidateHeap( heap, flags, block );
 194 }
 195
 196
 197 /***********************************************************************
 198  *           HeapWalk   (KERNEL32.@)
 199  * Enumerates the memory blocks in a specified heap.
 200  *
 201  * TODO
 202  *   - handling of PROCESS_HEAP_ENTRY_MOVEABLE and
 203  *     PROCESS_HEAP_ENTRY_DDESHARE (needs heap.c support)
 204  *
 205  * RETURNS
 206  *      TRUE: Success
 207  *      FALSE: Failure
 208  */
 209 BOOL WINAPI HeapWalk(
 210               HANDLE heap,               /* [in]  Handle to heap to enumerate */
 211               LPPROCESS_HEAP_ENTRY entry /* [out] Pointer to structure of enumeration info */
 212 ) {
 213     NTSTATUS ret = RtlWalkHeap( heap, entry );
 214     if (ret) SetLastError( RtlNtStatusToDosError(ret) );
 215     return !ret;
 216 }
 217
 218
 219 /***********************************************************************
 220  *           HeapLock   (KERNEL32.@)
 221  * Attempts to acquire the critical section object for a specified heap.
 222  *
 223  * RETURNS
 224  *      TRUE: Success
 225  *      FALSE: Failure
 226  */
 227 BOOL WINAPI HeapLock(
 228               HANDLE heap /* [in] Handle of heap to lock for exclusive access */
 229 ) {
 230     return RtlLockHeap( heap );
 231 }
 232
 233
 234 /***********************************************************************
 235  *           HeapUnlock   (KERNEL32.@)
 236  * Releases ownership of the critical section object.
 237  *
 238  * RETURNS
 239  *      TRUE: Success
 240  *      FALSE: Failure
 241  */
 242 BOOL WINAPI HeapUnlock(
 243               HANDLE heap /* [in] Handle to the heap to unlock */
 244 ) {
 245     return RtlUnlockHeap( heap );
 246 }
 247
 248
 249 /***********************************************************************
 250  *           GetProcessHeap    (KERNEL32.@)
 251  */
 252 HANDLE WINAPI GetProcessHeap(void)
 253 {
 254     return NtCurrentTeb()->Peb->ProcessHeap;
 255 }
 256
 257
 258 /***********************************************************************
 259  *           GetProcessHeaps    (KERNEL32.@)
 260  */
 261 DWORD WINAPI GetProcessHeaps( DWORD count, HANDLE *heaps )
 262 {
 263     return RtlGetProcessHeaps( count, heaps );
 264 }
 265
 266
 267 /* These are needed so that we can call the functions from inside kernel itself */
 268
 269 LPVOID WINAPI HeapAlloc( HANDLE heap, DWORD flags, SIZE_T size )
 270 {
 271     return RtlAllocateHeap( heap, flags, size );
 272 }
 273
 274 BOOL WINAPI HeapFree( HANDLE heap, DWORD flags, LPVOID ptr )
 275 {
 276     return RtlFreeHeap( heap, flags, ptr );
 277 }
 278
 279 LPVOID WINAPI HeapReAlloc( HANDLE heap, DWORD flags, LPVOID ptr, SIZE_T size )
 280 {
 281     return RtlReAllocateHeap( heap, flags, ptr, size );
 282 }
 283
 284 SIZE_T WINAPI HeapSize( HANDLE heap, DWORD flags, LPVOID ptr )
 285 {
 286     return RtlSizeHeap( heap, flags, ptr );
 287 }
 288
 289 /*
 290  * Win32 Global heap functions (GlobalXXX).
 291  * These functions included in Win32 for compatibility with 16 bit Windows
 292  * Especially the moveable blocks and handles are oldish.
 293  * But the ability to directly allocate memory with GPTR and LPTR is widely
 294  * used.
 295  *
 296  * The handle stuff looks horrible, but it's implemented almost like Win95
 297  * does it.
 298  *
 299  */
 300
 301 #define MAGIC_GLOBAL_USED 0x5342
 302 #define HANDLE_TO_INTERN(h)  ((PGLOBAL32_INTERN)(((char *)(h))-2))
 303 #define INTERN_TO_HANDLE(i)  ((HGLOBAL) &((i)->Pointer))
 304 #define POINTER_TO_HANDLE(p) (*(((HGLOBAL *)(p))-2))
 305 #define ISHANDLE(h)          (((ULONG_PTR)(h)&2)!=0)
 306 #define ISPOINTER(h)         (((ULONG_PTR)(h)&2)==0)
 307 /* align the storage needed for the HGLOBAL on an 8byte boundary thus
 308  * GlobalAlloc/GlobalReAlloc'ing with GMEM_MOVEABLE of memory with
 309  * size = 8*k, where k=1,2,3,... alloc's exactly the given size.
 310  * The Minolta DiMAGE Image Viewer heavily relies on this, corrupting
 311  * the output jpeg's > 1 MB if not */
 312 #define HGLOBAL_STORAGE      8  /* sizeof(HGLOBAL)*2 */
 313
 314 #include "pshpack1.h"
 315
 316 typedef struct __GLOBAL32_INTERN
 317 {
 318    WORD         Magic;
 319    LPVOID       Pointer;
 320    BYTE         Flags;
 321    BYTE         LockCount;
 322 } GLOBAL32_INTERN, *PGLOBAL32_INTERN;
 323
 324 #include "poppack.h"
 325
 326 /***********************************************************************
 327  *           GlobalAlloc   (KERNEL32.@)
 328  *
 329  * Allocate a global memory object.
 330  *
 331  * RETURNS
 332  *      Handle: Success
 333  *      NULL: Failure
 334  */
 335 HGLOBAL WINAPI GlobalAlloc(
 336                  UINT flags, /* [in] Object allocation attributes */
 337                  SIZE_T size /* [in] Number of bytes to allocate */
 338 ) {
 339    PGLOBAL32_INTERN     pintern;
 340    DWORD                hpflags;
 341    LPVOID               palloc;
 342
 343    if(flags&GMEM_ZEROINIT)
 344       hpflags=HEAP_ZERO_MEMORY;
 345    else
 346       hpflags=0;
 347
 348    TRACE("() flags=%04x\n",  flags );
 349
 350    if((flags & GMEM_MOVEABLE)==0) /* POINTER */
 351    {
 352       palloc=HeapAlloc(GetProcessHeap(), hpflags, size);
 353       return (HGLOBAL) palloc;
 354    }
 355    else  /* HANDLE */
 356    {
 357       RtlLockHeap(GetProcessHeap());
 358
 359       pintern = HeapAlloc(GetProcessHeap(), 0, sizeof(GLOBAL32_INTERN));
 360       if (pintern)
 361       {
 362           pintern->Magic = MAGIC_GLOBAL_USED;
 363           pintern->Flags = flags >> 8;
 364           pintern->LockCount = 0;
 365
 366           if (size)
 367           {
 368               palloc = HeapAlloc(GetProcessHeap(), hpflags, size+HGLOBAL_STORAGE);
 369               if (!palloc)
 370               {
 371                   HeapFree(GetProcessHeap(), 0, pintern);
 372                   pintern = NULL;
 373               }
 374               else
 375               {
 376                   *(HGLOBAL *)palloc = INTERN_TO_HANDLE(pintern);
 377                   pintern->Pointer = (char *)palloc + HGLOBAL_STORAGE;
 378               }
 379           }
 380           else
 381               pintern->Pointer = NULL;
 382       }
 383
 384       RtlUnlockHeap(GetProcessHeap());
 385       return pintern ? INTERN_TO_HANDLE(pintern) : 0;
 386    }
 387 }
 388
 389
 390 /***********************************************************************
 391  *           GlobalLock   (KERNEL32.@)
 392  *
 393  * Lock a global memory object.
 394  *
 395  * RETURNS
 396  *      Pointer to first byte of block
 397  *      NULL: Failure
 398  */
 399 LPVOID WINAPI GlobalLock(
 400               HGLOBAL hmem /* [in] Handle of global memory object */
 401 )
 402 {
 403     PGLOBAL32_INTERN pintern;
 404     LPVOID           palloc;
 405
 406     if (ISPOINTER(hmem))
 407         return IsBadReadPtr(hmem, 1) ? NULL : hmem;
 408
 409     RtlLockHeap(GetProcessHeap());
 410     __TRY
 411     {
 412         pintern = HANDLE_TO_INTERN(hmem);
 413         if (pintern->Magic == MAGIC_GLOBAL_USED)
 414         {
 415             palloc = pintern->Pointer;
 416             if (!pintern->Pointer)
 417                 SetLastError(ERROR_DISCARDED);
 418             else if (pintern->LockCount < GMEM_LOCKCOUNT)
 419                 pintern->LockCount++;
 420         }
 421         else
 422         {
 423             WARN("invalid handle %p\n", hmem);
 424             palloc = NULL;
 425             SetLastError(ERROR_INVALID_HANDLE);
 426         }
 427     }
 428     __EXCEPT_PAGE_FAULT
 429     {
 430         WARN("page fault on %p\n", hmem);
 431         palloc = NULL;
 432         SetLastError(ERROR_INVALID_HANDLE);
 433     }
 434     __ENDTRY
 435     RtlUnlockHeap(GetProcessHeap());
 436     return palloc;
 437 }
 438
 439
 440 /***********************************************************************
 441  *           GlobalUnlock   (KERNEL32.@)
 442  *
 443  * Unlock a global memory object.
 444  *
 445  * RETURNS
 446  *      TRUE: Object is still locked
 447  *      FALSE: Object is unlocked
 448  */
 449 BOOL WINAPI GlobalUnlock(
 450               HGLOBAL hmem /* [in] Handle of global memory object */
 451 ) {
 452     PGLOBAL32_INTERN pintern;
 453     BOOL locked;
 454
 455     if (ISPOINTER(hmem)) return FALSE;
 456
 457     RtlLockHeap(GetProcessHeap());
 458     __TRY
 459     {
 460         pintern=HANDLE_TO_INTERN(hmem);
 461         if(pintern->Magic==MAGIC_GLOBAL_USED)
 462         {
 463             if(pintern->LockCount)
 464             {
 465                 pintern->LockCount--;
 466                 locked = (pintern->LockCount != 0);
 467                 if (!locked) SetLastError(NO_ERROR);
 468             }
 469             else
 470             {
 471                 WARN("%p not locked\n", hmem);
 472                 SetLastError(ERROR_NOT_LOCKED);
 473                 locked = FALSE;
 474             }
 475         }
 476         else
 477         {
 478             WARN("invalid handle\n");
 479             SetLastError(ERROR_INVALID_HANDLE);
 480             locked=FALSE;
 481         }
 482     }
 483     __EXCEPT_PAGE_FAULT
 484     {
 485         ERR("page fault occurred ! Caused by bug ?\n");
 486         SetLastError( ERROR_INVALID_PARAMETER );
 487         locked=FALSE;
 488     }
 489     __ENDTRY
 490     RtlUnlockHeap(GetProcessHeap());
 491     return locked;
 492 }
 493
 494
 495 /***********************************************************************
 496  *           GlobalHandle   (KERNEL32.@)
 497  *
 498  * Get the handle associated with the pointer to a global memory block.
 499  *
 500  * RETURNS
 501  *      Handle: Success
 502  *      NULL: Failure
 503  */
 504 HGLOBAL WINAPI GlobalHandle(
 505                  LPCVOID pmem /* [in] Pointer to global memory block */
 506 ) {
 507     HGLOBAL handle;
 508     PGLOBAL32_INTERN  maybe_intern;
 509     LPCVOID test;
 510
 511     if (!pmem)
 512     {
 513         SetLastError( ERROR_INVALID_PARAMETER );
 514         return 0;
 515     }
 516
 517     RtlLockHeap(GetProcessHeap());
 518     __TRY
 519     {
 520         handle = 0;
 521
 522         /* note that if pmem is a pointer to a a block allocated by        */
 523         /* GlobalAlloc with GMEM_MOVEABLE then magic test in HeapValidate  */
 524         /* will fail.                                                      */
 525         if (ISPOINTER(pmem)) {
 526             if (HeapValidate( GetProcessHeap(), 0, pmem )) {
 527                 handle = (HGLOBAL)pmem;  /* valid fixed block */
 528                 break;
 529             }
 530             handle = POINTER_TO_HANDLE(pmem);
 531         } else
 532             handle = (HGLOBAL)pmem;
 533
 534         /* Now test handle either passed in or retrieved from pointer */
 535         maybe_intern = HANDLE_TO_INTERN( handle );
 536         if (maybe_intern->Magic == MAGIC_GLOBAL_USED) {
 537             test = maybe_intern->Pointer;
 538             if (HeapValidate( GetProcessHeap(), 0, (const char *)test - HGLOBAL_STORAGE ) && /* obj(-handle) valid arena? */
 539                 HeapValidate( GetProcessHeap(), 0, maybe_intern ))  /* intern valid arena? */
 540                 break;  /* valid moveable block */
 541         }
 542         handle = 0;
 543         SetLastError( ERROR_INVALID_HANDLE );
 544     }
 545     __EXCEPT_PAGE_FAULT
 546     {
 547         SetLastError( ERROR_INVALID_HANDLE );
 548         handle = 0;
 549     }
 550     __ENDTRY
 551     RtlUnlockHeap(GetProcessHeap());
 552
 553     return handle;
 554 }
 555
 556
 557 /***********************************************************************
 558  *           GlobalReAlloc   (KERNEL32.@)
 559  *
 560  * Change the size or attributes of a global memory object.
 561  *
 562  * RETURNS
 563  *      Handle: Success
 564  *      NULL: Failure
 565  */
 566 HGLOBAL WINAPI GlobalReAlloc(
 567                  HGLOBAL hmem, /* [in] Handle of global memory object */
 568                  SIZE_T size,  /* [in] New size of block */
 569                  UINT flags    /* [in] How to reallocate object */
 570 ) {
 571    LPVOID               palloc;
 572    HGLOBAL            hnew;
 573    PGLOBAL32_INTERN     pintern;
 574    DWORD heap_flags = (flags & GMEM_ZEROINIT) ? HEAP_ZERO_MEMORY : 0;
 575
 576    hnew = 0;
 577    RtlLockHeap(GetProcessHeap());
 578    if(flags & GMEM_MODIFY) /* modify flags */
 579    {
 580       if( ISPOINTER(hmem) && (flags & GMEM_MOVEABLE))
 581       {
 582          /* make a fixed block moveable
 583           * actually only NT is able to do this. But it's soo simple
 584           */
 585          if (hmem == 0)
 586          {
 587              WARN("GlobalReAlloc with null handle!\n");
 588              SetLastError( ERROR_NOACCESS );
 589              hnew = 0;
 590          }
 591          else
 592          {
 593              size = HeapSize(GetProcessHeap(), 0, (LPVOID)hmem);
 594              hnew = GlobalAlloc(flags, size);
 595              palloc = GlobalLock(hnew);
 596              memcpy(palloc, (LPVOID)hmem, size);
 597              GlobalUnlock(hnew);
 598              GlobalFree(hmem);
 599          }
 600       }
 601       else if( ISPOINTER(hmem) &&(flags & GMEM_DISCARDABLE))
 602       {
 603          /* change the flags to make our block "discardable" */
 604          pintern=HANDLE_TO_INTERN(hmem);
 605          pintern->Flags = pintern->Flags | (GMEM_DISCARDABLE >> 8);
 606          hnew=hmem;
 607       }
 608       else
 609       {
 610          SetLastError(ERROR_INVALID_PARAMETER);
 611          hnew = 0;
 612       }
 613    }
 614    else
 615    {
 616       if(ISPOINTER(hmem))
 617       {
 618          /* reallocate fixed memory */
 619          hnew=HeapReAlloc(GetProcessHeap(), heap_flags, hmem, size);
 620       }
 621       else
 622       {
 623          /* reallocate a moveable block */
 624          pintern=HANDLE_TO_INTERN(hmem);
 625
 626 #if 0
 627 /* Apparently Windows doesn't care whether the handle is locked at this point */
 628 /* See also the same comment in GlobalFree() */
 629          if(pintern->LockCount>1) {
 630             ERR("handle 0x%08lx is still locked, cannot realloc!\n",(DWORD)hmem);
 631             SetLastError(ERROR_INVALID_HANDLE);
 632          } else
 633 #endif
 634          if(size!=0)
 635          {
 636             hnew=hmem;
 637             if(pintern->Pointer)
 638             {
 639                if((palloc = HeapReAlloc(GetProcessHeap(), heap_flags,
 640                                    (char *) pintern->Pointer-HGLOBAL_STORAGE,
 641                                    size+HGLOBAL_STORAGE)) == NULL)
 642                    hnew = 0; /* Block still valid */
 643                else
 644                    pintern->Pointer = (char *)palloc+HGLOBAL_STORAGE;
 645             }
 646             else
 647             {
 648                 if((palloc=HeapAlloc(GetProcessHeap(), heap_flags, size+HGLOBAL_STORAGE))
 649                    == NULL)
 650                     hnew = 0;
 651                 else
 652                 {
 653                     *(HGLOBAL *)palloc = hmem;
 654                     pintern->Pointer = (char *)palloc + HGLOBAL_STORAGE;
 655                 }
 656             }
 657          }
 658          else
 659          {
 660             if(pintern->Pointer)
 661             {
 662                HeapFree(GetProcessHeap(), 0, (char *) pintern->Pointer-HGLOBAL_STORAGE);
 663                pintern->Pointer=NULL;
 664             }
 665          }
 666       }
 667    }
 668    RtlUnlockHeap(GetProcessHeap());
 669    return hnew;
 670 }
 671
 672
 673 /***********************************************************************
 674  *           GlobalFree   (KERNEL32.@)
 675  *
 676  * Free a global memory object.
 677  *
 678  * RETURNS
 679  *      NULL: Success
 680  *      Handle: Failure
 681  */
 682 HGLOBAL WINAPI GlobalFree(
 683                  HGLOBAL hmem /* [in] Handle of global memory object */
 684 ) {
 685     PGLOBAL32_INTERN pintern;
 686     HGLOBAL hreturned;
 687
 688     RtlLockHeap(GetProcessHeap());
 689     __TRY
 690     {
 691         hreturned = 0;
 692         if(ISPOINTER(hmem)) /* POINTER */
 693         {
 694             if(!HeapFree(GetProcessHeap(), 0, (LPVOID) hmem)) hmem = 0;
 695         }
 696         else  /* HANDLE */
 697         {
 698             pintern=HANDLE_TO_INTERN(hmem);
 699
 700             if(pintern->Magic==MAGIC_GLOBAL_USED)
 701             {
 702
 703                 /* WIN98 does not make this test. That is you can free a */
 704                 /* block you have not unlocked. Go figure!!              */
 705                 /* if(pintern->LockCount!=0)  */
 706                 /*    SetLastError(ERROR_INVALID_HANDLE);  */
 707
 708                 if(pintern->Pointer)
 709                     if(!HeapFree(GetProcessHeap(), 0, (char *)(pintern->Pointer)-HGLOBAL_STORAGE))
 710                         hreturned=hmem;
 711                 if(!HeapFree(GetProcessHeap(), 0, pintern))
 712                     hreturned=hmem;
 713             }
 714         }
 715     }
 716     __EXCEPT_PAGE_FAULT
 717     {
 718         ERR("page fault occurred ! Caused by bug ?\n");
 719         SetLastError( ERROR_INVALID_PARAMETER );
 720         hreturned = hmem;
 721     }
 722     __ENDTRY
 723     RtlUnlockHeap(GetProcessHeap());
 724     return hreturned;
 725 }
 726
 727
 728 /***********************************************************************
 729  *           GlobalSize   (KERNEL32.@)
 730  *
 731  * Get the size of a global memory object.
 732  *
 733  * RETURNS
 734  *      Size in bytes of the global memory object
 735  *      0: Failure
 736  */
 737 SIZE_T WINAPI GlobalSize(
 738              HGLOBAL hmem /* [in] Handle of global memory object */
 739 ) {
 740    DWORD                retval;
 741    PGLOBAL32_INTERN     pintern;
 742
 743    if (!hmem) return 0;
 744
 745    if(ISPOINTER(hmem))
 746    {
 747       retval=HeapSize(GetProcessHeap(), 0,  (LPVOID) hmem);
 748    }
 749    else
 750    {
 751       RtlLockHeap(GetProcessHeap());
 752       pintern=HANDLE_TO_INTERN(hmem);
 753
 754       if(pintern->Magic==MAGIC_GLOBAL_USED)
 755       {
 756          if (!pintern->Pointer) /* handle case of GlobalAlloc( ??,0) */
 757              retval = 0;
 758          else
 759          {
 760              retval = HeapSize(GetProcessHeap(), 0,
 761                          (char *)(pintern->Pointer) - HGLOBAL_STORAGE );
 762              if (retval != (DWORD)-1) retval -= HGLOBAL_STORAGE;
 763          }
 764       }
 765       else
 766       {
 767          WARN("invalid handle\n");
 768          retval=0;
 769       }
 770       RtlUnlockHeap(GetProcessHeap());
 771    }
 772    /* HeapSize returns 0xffffffff on failure */
 773    if (retval == 0xffffffff) retval = 0;
 774    return retval;
 775 }
 776
 777
 778 /***********************************************************************
 779  *           GlobalWire   (KERNEL32.@)
 780  */
 781 LPVOID WINAPI GlobalWire(HGLOBAL hmem)
 782 {
 783    return GlobalLock( hmem );
 784 }
 785
 786
 787 /***********************************************************************
 788  *           GlobalUnWire   (KERNEL32.@)
 789  */
 790 BOOL WINAPI GlobalUnWire(HGLOBAL hmem)
 791 {
 792    return GlobalUnlock( hmem);
 793 }
 794
 795
 796 /***********************************************************************
 797  *           GlobalFix   (KERNEL32.@)
 798  */
 799 VOID WINAPI GlobalFix(HGLOBAL hmem)
 800 {
 801     GlobalLock( hmem );
 802 }
 803
 804
 805 /***********************************************************************
 806  *           GlobalUnfix   (KERNEL32.@)
 807  */
 808 VOID WINAPI GlobalUnfix(HGLOBAL hmem)
 809 {
 810    GlobalUnlock( hmem);
 811 }
 812
 813
 814 /***********************************************************************
 815  *           GlobalFlags   (KERNEL32.@)
 816  *
 817  * Get information about a global memory object.
 818  *
 819  * NOTES
 820  *      Should this return GMEM_INVALID_HANDLE on invalid handle?
 821  *
 822  * RETURNS
 823  *      Value specifying allocation flags and lock count
 824  *      GMEM_INVALID_HANDLE: Failure
 825  */
 826 UINT WINAPI GlobalFlags(
 827               HGLOBAL hmem /* [in] Handle to global memory object */
 828 ) {
 829    DWORD                retval;
 830    PGLOBAL32_INTERN     pintern;
 831
 832    if(ISPOINTER(hmem))
 833    {
 834       retval=0;
 835    }
 836    else
 837    {
 838       RtlLockHeap(GetProcessHeap());
 839       pintern=HANDLE_TO_INTERN(hmem);
 840       if(pintern->Magic==MAGIC_GLOBAL_USED)
 841       {
 842          retval=pintern->LockCount + (pintern->Flags<<8);
 843          if(pintern->Pointer==0)
 844             retval|= GMEM_DISCARDED;
 845       }
 846       else
 847       {
 848          WARN("Invalid handle: %p\n", hmem);
 849          retval=0;
 850       }
 851       RtlUnlockHeap(GetProcessHeap());
 852    }
 853    return retval;
 854 }
 855
 856
 857 /***********************************************************************
 858  *           GlobalCompact   (KERNEL32.@)
 859  */
 860 SIZE_T WINAPI GlobalCompact( DWORD minfree )
 861 {
 862     return 0;  /* GlobalCompact does nothing in Win32 */
 863 }
 864
 865
 866 /***********************************************************************
 867  *           LocalAlloc   (KERNEL32.@)
 868  *
 869  * Allocate a local memory object.
 870  *
 871  * RETURNS
 872  *      Handle: Success
 873  *      NULL: Failure
 874  *
 875  * NOTES
 876  *  Windows memory management does not provide a separate local heap
 877  *  and global heap.
 878  */
 879 HLOCAL WINAPI LocalAlloc(
 880                 UINT flags, /* [in] Allocation attributes */
 881                 SIZE_T size /* [in] Number of bytes to allocate */
 882 ) {
 883     return (HLOCAL)GlobalAlloc( flags, size );
 884 }
 885
 886
 887 /***********************************************************************
 888  *           LocalCompact   (KERNEL32.@)
 889  */
 890 SIZE_T WINAPI LocalCompact( UINT minfree )
 891 {
 892     return 0;  /* LocalCompact does nothing in Win32 */
 893 }
 894
 895
 896 /***********************************************************************
 897  *           LocalFlags   (KERNEL32.@)
 898  *
 899  * Get information about a local memory object.
 900  *
 901  * RETURNS
 902  *      Value specifying allocation flags and lock count.
 903  *      LMEM_INVALID_HANDLE: Failure
 904  *
 905  * NOTES
 906  *  Windows memory management does not provide a separate local heap
 907  *  and global heap.
 908  */
 909 UINT WINAPI LocalFlags(
 910               HLOCAL handle /* [in] Handle of memory object */
 911 ) {
 912     return GlobalFlags( (HGLOBAL)handle );
 913 }
 914
 915
 916 /***********************************************************************
 917  *           LocalFree   (KERNEL32.@)
 918  *
 919  * Free a local memory object.
 920  *
 921  * RETURNS
 922  *      NULL: Success
 923  *      Handle: Failure
 924  *
 925  * NOTES
 926  *  Windows memory management does not provide a separate local heap
 927  *  and global heap.
 928  */
 929 HLOCAL WINAPI LocalFree(
 930                 HLOCAL handle /* [in] Handle of memory object */
 931 ) {
 932     return (HLOCAL)GlobalFree( (HGLOBAL)handle );
 933 }
 934
 935
 936 /***********************************************************************
 937  *           LocalHandle   (KERNEL32.@)
 938  *
 939  * Get the handle associated with the pointer to a local memory block.
 940  *
 941  * RETURNS
 942  *      Handle: Success
 943  *      NULL: Failure
 944  *
 945  * NOTES
 946  *  Windows memory management does not provide a separate local heap
 947  *  and global heap.
 948  */
 949 HLOCAL WINAPI LocalHandle(
 950                 LPCVOID ptr /* [in] Address of local memory block */
 951 ) {
 952     return (HLOCAL)GlobalHandle( ptr );
 953 }
 954
 955
 956 /***********************************************************************
 957  *           LocalLock   (KERNEL32.@)
 958  * Locks a local memory object and returns pointer to the first byte
 959  * of the memory block.
 960  *
 961  * RETURNS
 962  *      Pointer: Success
 963  *      NULL: Failure
 964  *
 965  * NOTES
 966  *  Windows memory management does not provide a separate local heap
 967  *  and global heap.
 968  */
 969 LPVOID WINAPI LocalLock(
 970               HLOCAL handle /* [in] Address of local memory object */
 971 ) {
 972     return GlobalLock( (HGLOBAL)handle );
 973 }
 974
 975
 976 /***********************************************************************
 977  *           LocalReAlloc   (KERNEL32.@)
 978  *
 979  * Change the size or attributes of a local memory object.
 980  *
 981  * RETURNS
 982  *      Handle: Success
 983  *      NULL: Failure
 984  *
 985  * NOTES
 986  *  Windows memory management does not provide a separate local heap
 987  *  and global heap.
 988  */
 989 HLOCAL WINAPI LocalReAlloc(
 990                 HLOCAL handle, /* [in] Handle of memory object */
 991                 SIZE_T size,   /* [in] New size of block */
 992                 UINT flags     /* [in] How to reallocate object */
 993 ) {
 994     return (HLOCAL)GlobalReAlloc( (HGLOBAL)handle, size, flags );
 995 }
 996
 997
 998 /***********************************************************************
 999  *           LocalShrink   (KERNEL32.@)
1000  */
1001 SIZE_T WINAPI LocalShrink( HGLOBAL handle, UINT newsize )
1002 {
1003     return 0;  /* LocalShrink does nothing in Win32 */
1004 }
1005
1006
1007 /***********************************************************************
1008  *           LocalSize   (KERNEL32.@)
1009  *
1010  * Get the size of a local memory object.
1011  *
1012  * RETURNS
1013  *      Size: Success
1014  *      0: Failure
1015  *
1016  * NOTES
1017  *  Windows memory management does not provide a separate local heap
1018  *  and global heap.
1019  */
1020 SIZE_T WINAPI LocalSize(
1021               HLOCAL handle /* [in] Handle of memory object */
1022 ) {
1023     return GlobalSize( (HGLOBAL)handle );
1024 }
1025
1026
1027 /***********************************************************************
1028  *           LocalUnlock   (KERNEL32.@)
1029  *
1030  * Unlock a local memory object.
1031  *
1032  * RETURNS
1033  *      TRUE: Object is still locked
1034  *      FALSE: Object is unlocked
1035  *
1036  * NOTES
1037  *  Windows memory management does not provide a separate local heap
1038  *  and global heap.
1039  */
1040 BOOL WINAPI LocalUnlock(
1041               HLOCAL handle /* [in] Handle of memory object */
1042 ) {
1043     return GlobalUnlock( (HGLOBAL)handle );
1044 }
1045
1046
1047 /**********************************************************************
1048  *              AllocMappedBuffer       (KERNEL32.38)
1049  *
1050  * This is an undocumented KERNEL32 function that
1051  * SMapLS's a GlobalAlloc'ed buffer.
1052  *
1053  * RETURNS
1054  *       EDI register: pointer to buffer
1055  *
1056  * NOTES
1057  *       The buffer is preceded by 8 bytes:
1058  *        ...
1059  *       edi+0   buffer
1060  *       edi-4   SEGPTR to buffer
1061  *       edi-8   some magic Win95 needs for SUnMapLS
1062  *               (we use it for the memory handle)
1063  *
1064  *       The SEGPTR is used by the caller!
1065  */
1066 void WINAPI __regs_AllocMappedBuffer(
1067               CONTEXT86 *context /* [in] EDI register: size of buffer to allocate */
1068 ) {
1069     HGLOBAL handle = GlobalAlloc(0, context->Edi + 8);
1070     DWORD *buffer = (DWORD *)GlobalLock(handle);
1071     DWORD ptr = 0;
1072
1073     if (buffer)
1074         if (!(ptr = MapLS(buffer + 2)))
1075         {
1076             GlobalUnlock(handle);
1077             GlobalFree(handle);
1078         }
1079
1080     if (!ptr)
1081         context->Eax = context->Edi = 0;
1082     else
1083     {
1084         buffer[0] = (DWORD)handle;
1085         buffer[1] = ptr;
1086
1087         context->Eax = (DWORD) ptr;
1088         context->Edi = (DWORD)(buffer + 2);
1089     }
1090 }
1091 #ifdef DEFINE_REGS_ENTRYPOINT
1092 DEFINE_REGS_ENTRYPOINT( AllocMappedBuffer, 0, 0 );
1093 #endif
1094
1095 /**********************************************************************
1096  *              FreeMappedBuffer        (KERNEL32.39)
1097  *
1098  * Free a buffer allocated by AllocMappedBuffer
1099  *
1100  * RETURNS
1101  *  Nothing.
1102  */
1103 void WINAPI __regs_FreeMappedBuffer(
1104               CONTEXT86 *context /* [in] EDI register: pointer to buffer */
1105 ) {
1106     if (context->Edi)
1107     {
1108         DWORD *buffer = (DWORD *)context->Edi - 2;
1109
1110         UnMapLS(buffer[1]);
1111
1112         GlobalUnlock((HGLOBAL)buffer[0]);
1113         GlobalFree((HGLOBAL)buffer[0]);
1114     }
1115 }
1116 #ifdef DEFINE_REGS_ENTRYPOINT
1117 DEFINE_REGS_ENTRYPOINT( FreeMappedBuffer, 0, 0 );
1118 #endif
1119
1120 /***********************************************************************
1121  *           GlobalMemoryStatusEx   (KERNEL32.@)
1122  * A version of GlobalMemoryStatus that can deal with memory over 4GB
1123  *
1124  * RETURNS
1125  *      TRUE
1126  */
1127 BOOL WINAPI GlobalMemoryStatusEx( LPMEMORYSTATUSEX lpmemex )
1128 {
1129     static MEMORYSTATUSEX       cached_memstatus;
1130     static int cache_lastchecked = 0;
1131     SYSTEM_INFO si;
1132 #ifdef linux
1133     FILE *f;
1134 #endif
1135 #if defined(__FreeBSD__) || defined(__NetBSD__)
1136     int *tmp;
1137     int size_sys;
1138     int mib[2] = { CTL_HW };
1139 #endif
1140 #ifdef sun
1141     long pagesize,maxpages,freepages,swapspace,swapfree;
1142     struct anoninfo swapinf;
1143     int rval;
1144 #endif
1145
1146     if (time(NULL)==cache_lastchecked) {
1147         memcpy(lpmemex,&cached_memstatus,sizeof(*lpmemex));
1148         return TRUE;
1149     }
1150     cache_lastchecked = time(NULL);
1151
1152     lpmemex->dwLength         = sizeof(*lpmemex);
1153     lpmemex->dwMemoryLoad     = 0;
1154     lpmemex->ullTotalPhys     = 16*1024*1024;
1155     lpmemex->ullAvailPhys     = 16*1024*1024;
1156     lpmemex->ullTotalPageFile = 16*1024*1024;
1157     lpmemex->ullAvailPageFile = 16*1024*1024;
1158
1159 #ifdef linux
1160     f = fopen( "/proc/meminfo", "r" );
1161     if (f)
1162     {
1163         char buffer[256];
1164         int total, used, free, shared, buffers, cached;
1165
1166         lpmemex->ullTotalPhys = lpmemex->ullAvailPhys = 0;
1167         lpmemex->ullTotalPageFile = lpmemex->ullAvailPageFile = 0;
1168         while (fgets( buffer, sizeof(buffer), f ))
1169         {
1170             /* old style /proc/meminfo ... */
1171             if (sscanf( buffer, "Mem: %d %d %d %d %d %d", &total, &used, &free, &shared, &buffers, &cached ))
1172             {
1173                 lpmemex->ullTotalPhys += total;
1174                 lpmemex->ullAvailPhys += free + buffers + cached;
1175             }
1176             if (sscanf( buffer, "Swap: %d %d %d", &total, &used, &free ))
1177             {
1178                 lpmemex->ullTotalPageFile += total;
1179                 lpmemex->ullAvailPageFile += free;
1180             }
1181
1182             /* new style /proc/meminfo ... */
1183             if (sscanf(buffer, "MemTotal: %d", &total))
1184                 lpmemex->ullTotalPhys = total*1024;
1185             if (sscanf(buffer, "MemFree: %d", &free))
1186                 lpmemex->ullAvailPhys = free*1024;
1187             if (sscanf(buffer, "SwapTotal: %d", &total))
1188                 lpmemex->ullTotalPageFile = total*1024;
1189             if (sscanf(buffer, "SwapFree: %d", &free))
1190                 lpmemex->ullAvailPageFile = free*1024;
1191             if (sscanf(buffer, "Buffers: %d", &buffers))
1192                 lpmemex->ullAvailPhys += buffers*1024;
1193             if (sscanf(buffer, "Cached: %d", &cached))
1194                 lpmemex->ullAvailPhys += cached*1024;
1195         }
1196         fclose( f );
1197
1198         if (lpmemex->ullTotalPhys)
1199         {
1200             DWORDLONG TotalPhysical = lpmemex->ullTotalPhys+lpmemex->ullTotalPageFile;
1201             DWORDLONG AvailPhysical = lpmemex->ullAvailPhys+lpmemex->ullAvailPageFile;
1202             lpmemex->dwMemoryLoad = (TotalPhysical-AvailPhysical)
1203                                       / (TotalPhysical / 100);
1204         }
1205     }
1206 #elif defined(__FreeBSD__) || defined(__NetBSD__)
1207     mib[1] = HW_PHYSMEM;
1208     sysctl(mib, 2, NULL, &size_sys, NULL, 0);
1209     tmp = malloc(size_sys * sizeof(int));
1210     sysctl(mib, 2, tmp, &size_sys, NULL, 0);
1211     if (tmp && *tmp)
1212     {
1213         lpmemex->ullTotalPhys = *tmp;
1214         free(tmp);
1215         mib[1] = HW_USERMEM;
1216         sysctl(mib, 2, NULL, &size_sys, NULL, 0);
1217         tmp = malloc(size_sys * sizeof(int));
1218         sysctl(mib, 2, tmp, &size_sys, NULL, 0);
1219         if (tmp && *tmp)
1220         {
1221             lpmemex->ullAvailPhys = *tmp;
1222             lpmemex->ullTotalPageFile = *tmp;
1223             lpmemex->ullAvailPageFile = *tmp;
1224             lpmemex->dwMemoryLoad = lpmemex->ullTotalPhys - lpmemex->ullAvailPhys;
1225         } else
1226         {
1227             lpmemex->ullAvailPhys = lpmemex->ullTotalPhys;
1228             lpmemex->ullTotalPageFile = lpmemex->ullTotalPhys;
1229             lpmemex->ullAvailPageFile = lpmemex->ullTotalPhys;
1230             lpmemex->dwMemoryLoad = 0;
1231         }
1232         free(tmp);
1233
1234     }
1235 #elif defined ( sun )
1236     pagesize=sysconf(_SC_PAGESIZE);
1237     maxpages=sysconf(_SC_PHYS_PAGES);
1238     freepages=sysconf(_SC_AVPHYS_PAGES);
1239     rval=swapctl(SC_AINFO, &swapinf);
1240     if(rval >-1)
1241     {
1242         swapspace=swapinf.ani_max*pagesize;
1243         swapfree=swapinf.ani_free*pagesize;
1244     }else
1245     {
1246
1247         WARN("Swap size cannot be determined , assuming equal to physical memory\n");
1248         swapspace=maxpages*pagesize;
1249         swapfree=maxpages*pagesize;
1250     }
1251     lpmemex->ullTotalPhys=pagesize*maxpages;
1252     lpmemex->ullAvailPhys = pagesize*freepages;
1253     lpmemex->ullTotalPageFile = swapspace;
1254     lpmemex->ullAvailPageFile = swapfree;
1255     lpmemex->dwMemoryLoad =  lpmemex->ullTotalPhys - lpmemex->ullAvailPhys;
1256 #endif
1257
1258     /* Project2k refuses to start if it sees less than 1Mb of free swap */
1259     if (lpmemex->ullTotalPageFile < lpmemex->ullTotalPhys)
1260         lpmemex->ullTotalPageFile = lpmemex->ullTotalPhys;
1261     if (lpmemex->ullAvailPageFile < lpmemex->ullAvailPhys)
1262         lpmemex->ullAvailPageFile = lpmemex->ullAvailPhys;
1263
1264     /* FIXME: should do something for other systems */
1265     GetSystemInfo(&si);
1266     lpmemex->ullTotalVirtual  = (char*)si.lpMaximumApplicationAddress-(char*)si.lpMinimumApplicationAddress;
1267     /* FIXME: we should track down all the already allocated VM pages and substract them, for now arbitrarily remove 64KB so that it matches NT */
1268     lpmemex->ullAvailVirtual  = lpmemex->ullTotalVirtual-64*1024;
1269
1270     /* MSDN says about AvailExtendedVirtual: Size of unreserved and uncommitted
1271        memory in the extended portion of the virtual address space of the calling
1272        process, in bytes.
1273        However, I don't know what this means, so set it to zero :(
1274     */
1275     lpmemex->ullAvailExtendedVirtual = 0;
1276
1277     memcpy(&cached_memstatus,lpmemex,sizeof(*lpmemex));
1278
1279     TRACE("<-- LPMEMORYSTATUSEX: dwLength %ld, dwMemoryLoad %ld, ullTotalPhys %s, ullAvailPhys %s,"
1280           " ullTotalPageFile %s, ullAvailPageFile %s, ullTotalVirtual %s, ullAvailVirtual %s\n",
1281           lpmemex->dwLength, lpmemex->dwMemoryLoad, wine_dbgstr_longlong(lpmemex->ullTotalPhys),
1282           wine_dbgstr_longlong(lpmemex->ullAvailPhys), wine_dbgstr_longlong(lpmemex->ullTotalPageFile),
1283           wine_dbgstr_longlong(lpmemex->ullAvailPageFile), wine_dbgstr_longlong(lpmemex->ullTotalVirtual),
1284           wine_dbgstr_longlong(lpmemex->ullAvailVirtual) );
1285
1286     return TRUE;
1287 }
1288
1289 /***********************************************************************
1290  *           GlobalMemoryStatus   (KERNEL32.@)
1291  * Provides information about the status of the memory, so apps can tell
1292  * roughly how much they are able to allocate
1293  *
1294  * RETURNS
1295  *      None
1296  */
1297 VOID WINAPI GlobalMemoryStatus( LPMEMORYSTATUS lpBuffer )
1298 {
1299     MEMORYSTATUSEX memstatus;
1300     OSVERSIONINFOW osver;
1301
1302     /* Because GlobalMemoryStatus is identical to GlobalMemoryStatusEX save
1303        for one extra field in the struct, and the lack of a bug, we simply
1304        call GlobalMemoryStatusEx and copy the values across. */
1305     GlobalMemoryStatusEx(&memstatus);
1306
1307     lpBuffer->dwLength = sizeof(*lpBuffer);
1308     lpBuffer->dwMemoryLoad = memstatus.dwMemoryLoad;
1309
1310     /* Windows 2000 and later report -1 when values are greater than 4 Gb.
1311      * NT reports values modulo 4 Gb.
1312      * Values between 2 Gb and 4 Gb are rounded down to 2 Gb.
1313      */
1314
1315     osver.dwOSVersionInfoSize = sizeof(osver);
1316     GetVersionExW(&osver);
1317
1318     if ( osver.dwMajorVersion >= 5 )
1319     {
1320         lpBuffer->dwTotalPhys = (memstatus.ullTotalPhys > MAXDWORD) ? MAXDWORD :
1321                                 (memstatus.ullTotalPhys > MAXLONG) ? MAXLONG : memstatus.ullTotalPhys;
1322         lpBuffer->dwAvailPhys = (memstatus.ullAvailPhys > MAXDWORD) ? MAXDWORD :
1323                                 (memstatus.ullAvailPhys > MAXLONG) ? MAXLONG : memstatus.ullAvailPhys;
1324         lpBuffer->dwTotalPageFile = (memstatus.ullTotalPageFile > MAXDWORD) ? MAXDWORD :
1325                                     (memstatus.ullTotalPageFile > MAXLONG) ? MAXLONG : memstatus.ullTotalPageFile;
1326         lpBuffer->dwAvailPageFile = (memstatus.ullAvailPageFile > MAXDWORD) ? MAXDWORD :
1327                                     (memstatus.ullAvailPageFile > MAXLONG) ? MAXLONG : memstatus.ullAvailPageFile;
1328         lpBuffer->dwTotalVirtual = (memstatus.ullTotalVirtual > MAXDWORD) ? MAXDWORD :
1329                                    (memstatus.ullTotalVirtual > MAXLONG)  ? MAXLONG : memstatus.ullTotalVirtual;
1330         lpBuffer->dwAvailVirtual = (memstatus.ullAvailVirtual > MAXDWORD) ? MAXDWORD :
1331                                    (memstatus.ullAvailVirtual > MAXLONG) ? MAXLONG : memstatus.ullAvailVirtual;
1332     }
1333     else        /* duplicate NT bug */
1334     {
1335         lpBuffer->dwTotalPhys = (memstatus.ullTotalPhys > MAXDWORD) ? memstatus.ullTotalPhys :
1336                                 (memstatus.ullTotalPhys > MAXLONG) ? MAXLONG : memstatus.ullTotalPhys;
1337         lpBuffer->dwAvailPhys = (memstatus.ullAvailPhys > MAXDWORD) ? memstatus.ullAvailPhys :
1338                                 (memstatus.ullAvailPhys > MAXLONG) ? MAXLONG : memstatus.ullAvailPhys;
1339         lpBuffer->dwTotalPageFile = (memstatus.ullTotalPageFile > MAXDWORD) ? memstatus.ullTotalPageFile :
1340                                     (memstatus.ullTotalPageFile > MAXLONG) ? MAXLONG : memstatus.ullTotalPageFile;
1341         lpBuffer->dwAvailPageFile = (memstatus.ullAvailPageFile > MAXDWORD) ? memstatus.ullAvailPageFile :
1342                                     (memstatus.ullAvailPageFile > MAXLONG) ? MAXLONG : memstatus.ullAvailPageFile;
1343         lpBuffer->dwTotalVirtual = (memstatus.ullTotalVirtual > MAXDWORD) ? memstatus.ullTotalVirtual :
1344                                    (memstatus.ullTotalVirtual > MAXLONG)  ? MAXLONG : memstatus.ullTotalVirtual;
1345         lpBuffer->dwAvailVirtual = (memstatus.ullAvailVirtual > MAXDWORD) ? memstatus.ullAvailVirtual :
1346                                    (memstatus.ullAvailVirtual > MAXLONG) ? MAXLONG : memstatus.ullAvailVirtual;
1347     }
1348
1349     /* work around for broken photoshop 4 installer */
1350     if ( lpBuffer->dwAvailPhys +  lpBuffer->dwAvailPageFile >= 2U*1024*1024*1024)
1351          lpBuffer->dwAvailPageFile = 2U*1024*1024*1024 -  lpBuffer->dwAvailPhys - 1;
1352 }