dlls/kernel32/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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <assert.h>
  27 #include <limits.h>
  28 #include <stdlib.h>
  29 #include <stdarg.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <sys/types.h>
  33 #include <time.h>
  34 #ifdef HAVE_SYS_PARAM_H
  35 #include <sys/param.h>
  36 #endif
  37 #ifdef HAVE_SYS_SYSCTL_H
  38 #include <sys/sysctl.h>
  39 #endif
  40 #ifdef HAVE_UNISTD_H
  41 # include <unistd.h>
  42 #endif
  43
  44 #ifdef sun
  45 /* FIXME:  Unfortunately swapctl can't be used with largefile.... */
  46 # undef _FILE_OFFSET_BITS
  47 # define _FILE_OFFSET_BITS 32
  48 # ifdef HAVE_SYS_RESOURCE_H
  49 #  include <sys/resource.h>
  50 # endif
  51 # ifdef HAVE_SYS_STAT_H
  52 #  include <sys/stat.h>
  53 # endif
  54 # include <sys/swap.h>
  55 #endif
  56
  57
  58 #include "windef.h"
  59 #include "winbase.h"
  60 #include "winerror.h"
  61 #include "winnt.h"
  62 #include "winternl.h"
  63 #include "wine/exception.h"
  64 #include "wine/debug.h"
  65
  66 WINE_DEFAULT_DEBUG_CHANNEL(heap);
  67 WINE_DECLARE_DEBUG_CHANNEL(globalmem);
  68
  69 /* address where we try to map the system heap */
  70 #define SYSTEM_HEAP_BASE  ((void*)0x80000000)
  71 #define SYSTEM_HEAP_SIZE  0x1000000   /* Default heap size = 16Mb */
  72
  73 static HANDLE systemHeap;   /* globally shared heap */
  74
  75
  76 /***********************************************************************
  77  *           HEAP_CreateSystemHeap
  78  *
  79  * Create the system heap.
  80  */
  81 static inline HANDLE HEAP_CreateSystemHeap(void)
  82 {
  83     int created;
  84     void *base;
  85     HANDLE map, event;
  86
  87     /* create the system heap event first */
  88     event = CreateEventA( NULL, TRUE, FALSE, "__wine_system_heap_event" );
  89
  90     if (!(map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE,
  91                                     0, SYSTEM_HEAP_SIZE, "__wine_system_heap" ))) return 0;
  92     created = (GetLastError() != ERROR_ALREADY_EXISTS);
  93
  94     if (!(base = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, SYSTEM_HEAP_BASE )))
  95     {
  96         /* pre-defined address not available */
  97         ERR( "system heap base address %p not available\n", SYSTEM_HEAP_BASE );
  98         return 0;
  99     }
 100
 101     if (created)  /* newly created heap */
 102     {
 103         systemHeap = RtlCreateHeap( HEAP_SHARED, base, SYSTEM_HEAP_SIZE,
 104                                     SYSTEM_HEAP_SIZE, NULL, NULL );
 105         SetEvent( event );
 106     }
 107     else
 108     {
 109         /* wait for the heap to be initialized */
 110         WaitForSingleObject( event, INFINITE );
 111         systemHeap = base;
 112     }
 113     CloseHandle( map );
 114     return systemHeap;
 115 }
 116
 117
 118 /***********************************************************************
 119  *           HeapCreate   (KERNEL32.@)
 120  *
 121  * Create a heap object.
 122  *
 123  * RETURNS
 124  *      Handle of heap: Success
 125  *      NULL: Failure
 126  */
 127 HANDLE WINAPI HeapCreate(
 128                 DWORD flags,       /* [in] Heap allocation flag */
 129                 SIZE_T initialSize, /* [in] Initial heap size */
 130                 SIZE_T maxSize      /* [in] Maximum heap size */
 131 ) {
 132     HANDLE ret;
 133
 134     if ( flags & HEAP_SHARED )
 135     {
 136         if (!systemHeap) HEAP_CreateSystemHeap();
 137         else WARN( "Shared Heap requested, returning system heap.\n" );
 138         ret = systemHeap;
 139     }
 140     else
 141     {
 142         ret = RtlCreateHeap( flags, NULL, maxSize, initialSize, NULL, NULL );
 143         if (!ret) SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 144     }
 145     return ret;
 146 }
 147
 148
 149 /***********************************************************************
 150  *           HeapDestroy   (KERNEL32.@)
 151  *
 152  * Destroy a heap object.
 153  *
 154  * RETURNS
 155  *      TRUE: Success
 156  *      FALSE: Failure
 157  */
 158 BOOL WINAPI HeapDestroy( HANDLE heap /* [in] Handle of heap */ )
 159 {
 160     if (heap == systemHeap)
 161     {
 162         WARN( "attempt to destroy system heap, returning TRUE!\n" );
 163         return TRUE;
 164     }
 165     if (!RtlDestroyHeap( heap )) return TRUE;
 166     SetLastError( ERROR_INVALID_HANDLE );
 167     return FALSE;
 168 }
 169
 170
 171 /***********************************************************************
 172  *           HeapCompact   (KERNEL32.@)
 173  */
 174 SIZE_T WINAPI HeapCompact( HANDLE heap, DWORD flags )
 175 {
 176     return RtlCompactHeap( heap, flags );
 177 }
 178
 179
 180 /***********************************************************************
 181  *           HeapValidate   (KERNEL32.@)
 182  * Validates a specified heap.
 183  *
 184  * NOTES
 185  *      Flags is ignored.
 186  *
 187  * RETURNS
 188  *      TRUE: Success
 189  *      FALSE: Failure
 190  */
 191 BOOL WINAPI HeapValidate(
 192               HANDLE heap, /* [in] Handle to the heap */
 193               DWORD flags,   /* [in] Bit flags that control access during operation */
 194               LPCVOID block  /* [in] Optional pointer to memory block to validate */
 195 ) {
 196     return RtlValidateHeap( heap, flags, block );
 197 }
 198
 199
 200 /***********************************************************************
 201  *           HeapWalk   (KERNEL32.@)
 202  * Enumerates the memory blocks in a specified heap.
 203  *
 204  * TODO
 205  *   - handling of PROCESS_HEAP_ENTRY_MOVEABLE and
 206  *     PROCESS_HEAP_ENTRY_DDESHARE (needs heap.c support)
 207  *
 208  * RETURNS
 209  *      TRUE: Success
 210  *      FALSE: Failure
 211  */
 212 BOOL WINAPI HeapWalk(
 213               HANDLE heap,               /* [in]  Handle to heap to enumerate */
 214               LPPROCESS_HEAP_ENTRY entry /* [out] Pointer to structure of enumeration info */
 215 ) {
 216     NTSTATUS ret = RtlWalkHeap( heap, entry );
 217     if (ret) SetLastError( RtlNtStatusToDosError(ret) );
 218     return !ret;
 219 }
 220
 221
 222 /***********************************************************************
 223  *           HeapLock   (KERNEL32.@)
 224  * Attempts to acquire the critical section object for a specified heap.
 225  *
 226  * RETURNS
 227  *      TRUE: Success
 228  *      FALSE: Failure
 229  */
 230 BOOL WINAPI HeapLock(
 231               HANDLE heap /* [in] Handle of heap to lock for exclusive access */
 232 ) {
 233     return RtlLockHeap( heap );
 234 }
 235
 236
 237 /***********************************************************************
 238  *           HeapUnlock   (KERNEL32.@)
 239  * Releases ownership of the critical section object.
 240  *
 241  * RETURNS
 242  *      TRUE: Success
 243  *      FALSE: Failure
 244  */
 245 BOOL WINAPI HeapUnlock(
 246               HANDLE heap /* [in] Handle to the heap to unlock */
 247 ) {
 248     return RtlUnlockHeap( heap );
 249 }
 250
 251
 252 /***********************************************************************
 253  *           GetProcessHeaps    (KERNEL32.@)
 254  */
 255 DWORD WINAPI GetProcessHeaps( DWORD count, HANDLE *heaps )
 256 {
 257     return RtlGetProcessHeaps( count, heaps );
 258 }
 259
 260
 261 /* These are needed so that we can call the functions from inside kernel itself */
 262
 263 /***********************************************************************
 264  *           HeapAlloc    (KERNEL32.@)
 265  */
 266 LPVOID WINAPI HeapAlloc( HANDLE heap, DWORD flags, SIZE_T size )
 267 {
 268     return RtlAllocateHeap( heap, flags, size );
 269 }
 270
 271 BOOL WINAPI HeapFree( HANDLE heap, DWORD flags, LPVOID ptr )
 272 {
 273     return RtlFreeHeap( heap, flags, ptr );
 274 }
 275
 276 LPVOID WINAPI HeapReAlloc( HANDLE heap, DWORD flags, LPVOID ptr, SIZE_T size )
 277 {
 278     return RtlReAllocateHeap( heap, flags, ptr, size );
 279 }
 280
 281 SIZE_T WINAPI HeapSize( HANDLE heap, DWORD flags, LPCVOID ptr )
 282 {
 283     return RtlSizeHeap( heap, flags, ptr );
 284 }
 285
 286 BOOL WINAPI HeapQueryInformation( HANDLE heap, HEAP_INFORMATION_CLASS info_class,
 287                                   PVOID info, SIZE_T size_in, PSIZE_T size_out)
 288 {
 289     NTSTATUS ret = RtlQueryHeapInformation( heap, info_class, info, size_in, size_out );
 290     if (ret) SetLastError( RtlNtStatusToDosError(ret) );
 291     return !ret;
 292 }
 293
 294 BOOL WINAPI HeapSetInformation( HANDLE heap, HEAP_INFORMATION_CLASS infoclass, PVOID info, SIZE_T size)
 295 {
 296     FIXME("%p %d %p %ld\n", heap, infoclass, info, size );
 297     return TRUE;
 298 }
 299
 300 /*
 301  * Win32 Global heap functions (GlobalXXX).
 302  * These functions included in Win32 for compatibility with 16 bit Windows
 303  * Especially the moveable blocks and handles are oldish.
 304  * But the ability to directly allocate memory with GPTR and LPTR is widely
 305  * used.
 306  *
 307  * The handle stuff looks horrible, but it's implemented almost like Win95
 308  * does it.
 309  *
 310  */
 311
 312 #define MAGIC_GLOBAL_USED 0x5342
 313 #define HANDLE_TO_INTERN(h)  ((PGLOBAL32_INTERN)(((char *)(h))-2))
 314 #define INTERN_TO_HANDLE(i)  (&((i)->Pointer))
 315 #define POINTER_TO_HANDLE(p) (*(((const HGLOBAL *)(p))-2))
 316 #define ISHANDLE(h)          (((ULONG_PTR)(h)&2)!=0)
 317 #define ISPOINTER(h)         (((ULONG_PTR)(h)&2)==0)
 318 /* align the storage needed for the HGLOBAL on an 8byte boundary thus
 319  * GlobalAlloc/GlobalReAlloc'ing with GMEM_MOVEABLE of memory with
 320  * size = 8*k, where k=1,2,3,... alloc's exactly the given size.
 321  * The Minolta DiMAGE Image Viewer heavily relies on this, corrupting
 322  * the output jpeg's > 1 MB if not */
 323 #define HGLOBAL_STORAGE      (sizeof(HGLOBAL)*2)
 324
 325 #include "pshpack1.h"
 326
 327 typedef struct __GLOBAL32_INTERN
 328 {
 329    WORD         Magic;
 330    LPVOID       Pointer;
 331    BYTE         Flags;
 332    BYTE         LockCount;
 333 } GLOBAL32_INTERN, *PGLOBAL32_INTERN;
 334
 335 #include "poppack.h"
 336
 337 /***********************************************************************
 338  *           GlobalAlloc   (KERNEL32.@)
 339  *
 340  * Allocate a global memory object.
 341  *
 342  * RETURNS
 343  *      Handle: Success
 344  *      NULL: Failure
 345  */
 346 HGLOBAL WINAPI GlobalAlloc(
 347                  UINT flags, /* [in] Object allocation attributes */
 348                  SIZE_T size /* [in] Number of bytes to allocate */
 349 ) {
 350    PGLOBAL32_INTERN     pintern;
 351    DWORD                hpflags;
 352    LPVOID               palloc;
 353
 354    if(flags&GMEM_ZEROINIT)
 355       hpflags=HEAP_ZERO_MEMORY;
 356    else
 357       hpflags=0;
 358
 359    if((flags & GMEM_MOVEABLE)==0) /* POINTER */
 360    {
 361       palloc=HeapAlloc(GetProcessHeap(), hpflags, size);
 362       TRACE( "(flags=%04x) returning %p\n",  flags, palloc );
 363       return palloc;
 364    }
 365    else  /* HANDLE */
 366    {
 367       if (size > INT_MAX-HGLOBAL_STORAGE)
 368       {
 369           SetLastError(ERROR_OUTOFMEMORY);
 370           return 0;
 371       }
 372
 373       pintern = HeapAlloc(GetProcessHeap(), 0, sizeof(GLOBAL32_INTERN));
 374       if (pintern)
 375       {
 376           /* Mask out obsolete flags */
 377           flags &= ~(GMEM_LOWER | GMEM_NOCOMPACT | GMEM_NOT_BANKED | GMEM_NOTIFY);
 378
 379           pintern->Magic = MAGIC_GLOBAL_USED;
 380           pintern->Flags = flags >> 8;
 381           pintern->LockCount = 0;
 382
 383           if (size)
 384           {
 385               palloc = HeapAlloc(GetProcessHeap(), hpflags, size+HGLOBAL_STORAGE);
 386               if (!palloc)
 387               {
 388                   HeapFree(GetProcessHeap(), 0, pintern);
 389                   pintern = NULL;
 390               }
 391               else
 392               {
 393                   *(HGLOBAL *)palloc = INTERN_TO_HANDLE(pintern);
 394                   pintern->Pointer = (char *)palloc + HGLOBAL_STORAGE;
 395               }
 396           }
 397           else
 398               pintern->Pointer = NULL;
 399       }
 400
 401       if (!pintern) return 0;
 402       TRACE( "(flags=%04x) returning handle %p pointer %p\n",
 403              flags, INTERN_TO_HANDLE(pintern), pintern->Pointer );
 404       return INTERN_TO_HANDLE(pintern);
 405    }
 406 }
 407
 408
 409 /***********************************************************************
 410  *           GlobalLock   (KERNEL32.@)
 411  *
 412  * Lock a global memory object and return a pointer to first byte of the memory
 413  *
 414  * PARAMS
 415  *  hmem [I] Handle of the global memory object
 416  *
 417  * RETURNS
 418  *  Success: Pointer to first byte of the memory block
 419  *  Failure: NULL
 420  *
 421  * NOTES
 422  *   When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
 423  *
 424  */
 425 LPVOID WINAPI GlobalLock(HGLOBAL hmem)
 426 {
 427     PGLOBAL32_INTERN pintern;
 428     LPVOID           palloc;
 429
 430     if (ISPOINTER(hmem))
 431         return IsBadReadPtr(hmem, 1) ? NULL : hmem;
 432
 433     RtlLockHeap(GetProcessHeap());
 434     __TRY
 435     {
 436         pintern = HANDLE_TO_INTERN(hmem);
 437         if (pintern->Magic == MAGIC_GLOBAL_USED)
 438         {
 439             palloc = pintern->Pointer;
 440             if (!pintern->Pointer)
 441                 SetLastError(ERROR_DISCARDED);
 442             else if (pintern->LockCount < GMEM_LOCKCOUNT)
 443                 pintern->LockCount++;
 444         }
 445         else
 446         {
 447             WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 448             palloc = NULL;
 449             SetLastError(ERROR_INVALID_HANDLE);
 450         }
 451     }
 452     __EXCEPT_PAGE_FAULT
 453     {
 454         WARN("(%p): Page fault occurred ! Caused by bug ?\n", hmem);
 455         palloc = NULL;
 456         SetLastError(ERROR_INVALID_HANDLE);
 457     }
 458     __ENDTRY
 459     RtlUnlockHeap(GetProcessHeap());
 460     return palloc;
 461 }
 462
 463
 464 /***********************************************************************
 465  *           GlobalUnlock   (KERNEL32.@)
 466  *
 467  * Unlock a global memory object.
 468  *
 469  * PARAMS
 470  *  hmem [I] Handle of the global memory object
 471  *
 472  * RETURNS
 473  *  Success: Object is still locked
 474  *  Failure: FALSE (The Object is unlocked)
 475  *
 476  * NOTES
 477  *   When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
 478  *
 479  */
 480 BOOL WINAPI GlobalUnlock(HGLOBAL hmem)
 481 {
 482     PGLOBAL32_INTERN pintern;
 483     BOOL locked;
 484
 485     if (ISPOINTER(hmem)) return TRUE;
 486
 487     RtlLockHeap(GetProcessHeap());
 488     __TRY
 489     {
 490         pintern=HANDLE_TO_INTERN(hmem);
 491         if(pintern->Magic==MAGIC_GLOBAL_USED)
 492         {
 493             if(pintern->LockCount)
 494             {
 495                 pintern->LockCount--;
 496                 locked = (pintern->LockCount != 0);
 497                 if (!locked) SetLastError(NO_ERROR);
 498             }
 499             else
 500             {
 501                 WARN("%p not locked\n", hmem);
 502                 SetLastError(ERROR_NOT_LOCKED);
 503                 locked = FALSE;
 504             }
 505         }
 506         else
 507         {
 508             WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 509             SetLastError(ERROR_INVALID_HANDLE);
 510             locked=FALSE;
 511         }
 512     }
 513     __EXCEPT_PAGE_FAULT
 514     {
 515         WARN("(%p): Page fault occurred ! Caused by bug ?\n", hmem);
 516         SetLastError( ERROR_INVALID_PARAMETER );
 517         locked=FALSE;
 518     }
 519     __ENDTRY
 520     RtlUnlockHeap(GetProcessHeap());
 521     return locked;
 522 }
 523
 524
 525 /***********************************************************************
 526  *           GlobalHandle   (KERNEL32.@)
 527  *
 528  * Get the handle associated with the pointer to a global memory block.
 529  *
 530  * RETURNS
 531  *      Handle: Success
 532  *      NULL: Failure
 533  */
 534 HGLOBAL WINAPI GlobalHandle(
 535                  LPCVOID pmem /* [in] Pointer to global memory block */
 536 ) {
 537     HGLOBAL handle;
 538     PGLOBAL32_INTERN  maybe_intern;
 539     LPCVOID test;
 540
 541     if (!pmem)
 542     {
 543         SetLastError( ERROR_INVALID_PARAMETER );
 544         return 0;
 545     }
 546
 547     RtlLockHeap(GetProcessHeap());
 548     __TRY
 549     {
 550         handle = 0;
 551
 552         /* note that if pmem is a pointer to a block allocated by        */
 553         /* GlobalAlloc with GMEM_MOVEABLE then magic test in HeapValidate  */
 554         /* will fail.                                                      */
 555         if (ISPOINTER(pmem)) {
 556             if (HeapValidate( GetProcessHeap(), 0, pmem )) {
 557                 handle = (HGLOBAL)pmem;  /* valid fixed block */
 558                 break;
 559             }
 560             handle = POINTER_TO_HANDLE(pmem);
 561         } else
 562             handle = (HGLOBAL)pmem;
 563
 564         /* Now test handle either passed in or retrieved from pointer */
 565         maybe_intern = HANDLE_TO_INTERN( handle );
 566         if (maybe_intern->Magic == MAGIC_GLOBAL_USED) {
 567             test = maybe_intern->Pointer;
 568             if (HeapValidate( GetProcessHeap(), 0, (const char *)test - HGLOBAL_STORAGE ) && /* obj(-handle) valid arena? */
 569                 HeapValidate( GetProcessHeap(), 0, maybe_intern ))  /* intern valid arena? */
 570                 break;  /* valid moveable block */
 571         }
 572         handle = 0;
 573         SetLastError( ERROR_INVALID_HANDLE );
 574     }
 575     __EXCEPT_PAGE_FAULT
 576     {
 577         SetLastError( ERROR_INVALID_HANDLE );
 578         handle = 0;
 579     }
 580     __ENDTRY
 581     RtlUnlockHeap(GetProcessHeap());
 582
 583     return handle;
 584 }
 585
 586
 587 /***********************************************************************
 588  *           GlobalReAlloc   (KERNEL32.@)
 589  *
 590  * Change the size or attributes of a global memory object.
 591  *
 592  * RETURNS
 593  *      Handle: Success
 594  *      NULL: Failure
 595  */
 596 HGLOBAL WINAPI GlobalReAlloc(
 597                  HGLOBAL hmem, /* [in] Handle of global memory object */
 598                  SIZE_T size,  /* [in] New size of block */
 599                  UINT flags    /* [in] How to reallocate object */
 600 ) {
 601    LPVOID               palloc;
 602    HGLOBAL            hnew;
 603    PGLOBAL32_INTERN     pintern;
 604    DWORD heap_flags = (flags & GMEM_ZEROINIT) ? HEAP_ZERO_MEMORY : 0;
 605
 606    hnew = 0;
 607    RtlLockHeap(GetProcessHeap());
 608    if(flags & GMEM_MODIFY) /* modify flags */
 609    {
 610       if( ISPOINTER(hmem) && (flags & GMEM_MOVEABLE))
 611       {
 612          /* make a fixed block moveable
 613           * actually only NT is able to do this. But it's soo simple
 614           */
 615          if (hmem == 0)
 616          {
 617              WARN("GlobalReAlloc with null handle!\n");
 618              SetLastError( ERROR_NOACCESS );
 619              hnew = 0;
 620          }
 621          else
 622          {
 623              size = HeapSize(GetProcessHeap(), 0, hmem);
 624              hnew = GlobalAlloc(flags, size);
 625              palloc = GlobalLock(hnew);
 626              memcpy(palloc, hmem, size);
 627              GlobalUnlock(hnew);
 628              GlobalFree(hmem);
 629          }
 630       }
 631       else if( ISPOINTER(hmem) &&(flags & GMEM_DISCARDABLE))
 632       {
 633          /* change the flags to make our block "discardable" */
 634          pintern=HANDLE_TO_INTERN(hmem);
 635          pintern->Flags = pintern->Flags | (GMEM_DISCARDABLE >> 8);
 636          hnew=hmem;
 637       }
 638       else
 639       {
 640          SetLastError(ERROR_INVALID_PARAMETER);
 641          hnew = 0;
 642       }
 643    }
 644    else
 645    {
 646       if(ISPOINTER(hmem))
 647       {
 648          /* reallocate fixed memory */
 649          hnew=HeapReAlloc(GetProcessHeap(), heap_flags, hmem, size);
 650       }
 651       else
 652       {
 653          /* reallocate a moveable block */
 654          pintern=HANDLE_TO_INTERN(hmem);
 655
 656 #if 0
 657 /* Apparently Windows doesn't care whether the handle is locked at this point */
 658 /* See also the same comment in GlobalFree() */
 659          if(pintern->LockCount>1) {
 660             ERR("handle 0x%08lx is still locked, cannot realloc!\n",(DWORD)hmem);
 661             SetLastError(ERROR_INVALID_HANDLE);
 662          } else
 663 #endif
 664          if(size!=0)
 665          {
 666             hnew=hmem;
 667             if(pintern->Pointer)
 668             {
 669                if(size > INT_MAX-HGLOBAL_STORAGE)
 670                {
 671                    SetLastError(ERROR_OUTOFMEMORY);
 672                    hnew = 0;
 673                }
 674                else if((palloc = HeapReAlloc(GetProcessHeap(), heap_flags,
 675                                    (char *) pintern->Pointer-HGLOBAL_STORAGE,
 676                                    size+HGLOBAL_STORAGE)) == NULL)
 677                    hnew = 0; /* Block still valid */
 678                else
 679                    pintern->Pointer = (char *)palloc+HGLOBAL_STORAGE;
 680             }
 681             else
 682             {
 683                 if(size > INT_MAX-HGLOBAL_STORAGE)
 684                 {
 685                     SetLastError(ERROR_OUTOFMEMORY);
 686                     hnew = 0;
 687                 }
 688                 else if((palloc=HeapAlloc(GetProcessHeap(), heap_flags, size+HGLOBAL_STORAGE))
 689                    == NULL)
 690                     hnew = 0;
 691                 else
 692                 {
 693                     *(HGLOBAL *)palloc = hmem;
 694                     pintern->Pointer = (char *)palloc + HGLOBAL_STORAGE;
 695                 }
 696             }
 697          }
 698          else
 699          {
 700             if (pintern->LockCount == 0)
 701             {
 702                 if(pintern->Pointer)
 703                 {
 704                     HeapFree(GetProcessHeap(), 0, (char *) pintern->Pointer-HGLOBAL_STORAGE);
 705                     pintern->Pointer = NULL;
 706                 }
 707                 hnew = hmem;
 708             }
 709             else
 710                 WARN("not freeing memory associated with locked handle\n");
 711          }
 712       }
 713    }
 714    RtlUnlockHeap(GetProcessHeap());
 715    return hnew;
 716 }
 717
 718
 719 /***********************************************************************
 720  *           GlobalFree   (KERNEL32.@)
 721  *
 722  * Free a global memory object.
 723  *
 724  * PARAMS
 725  *  hmem [I] Handle of the global memory object
 726  *
 727  * RETURNS
 728  *  Success: NULL
 729  *  Failure: The provided handle
 730  *
 731  * NOTES
 732  *   When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
 733  *
 734  */
 735 HGLOBAL WINAPI GlobalFree(HGLOBAL hmem)
 736 {
 737     PGLOBAL32_INTERN pintern;
 738     HGLOBAL hreturned;
 739
 740     RtlLockHeap(GetProcessHeap());
 741     __TRY
 742     {
 743         hreturned = 0;
 744         if(ISPOINTER(hmem)) /* POINTER */
 745         {
 746             if(!HeapFree(GetProcessHeap(), 0, hmem))
 747             {
 748                 SetLastError(ERROR_INVALID_HANDLE);
 749                 hreturned = hmem;
 750             }
 751         }
 752         else  /* HANDLE */
 753         {
 754             pintern=HANDLE_TO_INTERN(hmem);
 755
 756             if(pintern->Magic==MAGIC_GLOBAL_USED)
 757             {
 758                 pintern->Magic = 0xdead;
 759
 760                 /* WIN98 does not make this test. That is you can free a */
 761                 /* block you have not unlocked. Go figure!!              */
 762                 /* if(pintern->LockCount!=0)  */
 763                 /*    SetLastError(ERROR_INVALID_HANDLE);  */
 764
 765                 if(pintern->Pointer)
 766                     if(!HeapFree(GetProcessHeap(), 0, (char *)(pintern->Pointer)-HGLOBAL_STORAGE))
 767                         hreturned=hmem;
 768                 if(!HeapFree(GetProcessHeap(), 0, pintern))
 769                     hreturned=hmem;
 770             }
 771             else
 772             {
 773                 WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 774                 SetLastError(ERROR_INVALID_HANDLE);
 775                 hreturned = hmem;
 776             }
 777         }
 778     }
 779     __EXCEPT_PAGE_FAULT
 780     {
 781         ERR("(%p): Page fault occurred ! Caused by bug ?\n", hmem);
 782         SetLastError( ERROR_INVALID_PARAMETER );
 783         hreturned = hmem;
 784     }
 785     __ENDTRY
 786     RtlUnlockHeap(GetProcessHeap());
 787     return hreturned;
 788 }
 789
 790
 791 /***********************************************************************
 792  *           GlobalSize   (KERNEL32.@)
 793  *
 794  * Get the size of a global memory object.
 795  *
 796  * PARAMS
 797  *  hmem [I] Handle of the global memory object
 798  *
 799  * RETURNS
 800  *  Failure: 0
 801  *  Success: Size in Bytes of the global memory object
 802  *
 803  * NOTES
 804  *   When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
 805  *
 806  */
 807 SIZE_T WINAPI GlobalSize(HGLOBAL hmem)
 808 {
 809    SIZE_T               retval;
 810    PGLOBAL32_INTERN     pintern;
 811
 812    if (!((ULONG_PTR)hmem >> 16))
 813    {
 814        SetLastError(ERROR_INVALID_HANDLE);
 815        return 0;
 816    }
 817
 818    if(ISPOINTER(hmem))
 819    {
 820       retval=HeapSize(GetProcessHeap(), 0, hmem);
 821
 822       if (retval == ~0ul) /* It might be a GMEM_MOVEABLE data pointer */
 823       {
 824           retval = HeapSize(GetProcessHeap(), 0, (char*)hmem - HGLOBAL_STORAGE);
 825           if (retval != ~0ul) retval -= HGLOBAL_STORAGE;
 826       }
 827    }
 828    else
 829    {
 830       RtlLockHeap(GetProcessHeap());
 831       pintern=HANDLE_TO_INTERN(hmem);
 832
 833       if(pintern->Magic==MAGIC_GLOBAL_USED)
 834       {
 835          if (!pintern->Pointer) /* handle case of GlobalAlloc( ??,0) */
 836              retval = 0;
 837          else
 838          {
 839              retval = HeapSize(GetProcessHeap(), 0, (char *)pintern->Pointer - HGLOBAL_STORAGE );
 840              if (retval != ~0ul) retval -= HGLOBAL_STORAGE;
 841          }
 842       }
 843       else
 844       {
 845          WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 846          SetLastError(ERROR_INVALID_HANDLE);
 847          retval=0;
 848       }
 849       RtlUnlockHeap(GetProcessHeap());
 850    }
 851    if (retval == ~0ul) retval = 0;
 852    return retval;
 853 }
 854
 855
 856 /***********************************************************************
 857  *           GlobalWire   (KERNEL32.@)
 858  */
 859 LPVOID WINAPI GlobalWire(HGLOBAL hmem)
 860 {
 861    return GlobalLock( hmem );
 862 }
 863
 864
 865 /***********************************************************************
 866  *           GlobalUnWire   (KERNEL32.@)
 867  */
 868 BOOL WINAPI GlobalUnWire(HGLOBAL hmem)
 869 {
 870    return GlobalUnlock( hmem);
 871 }
 872
 873
 874 /***********************************************************************
 875  *           GlobalFix   (KERNEL32.@)
 876  */
 877 VOID WINAPI GlobalFix(HGLOBAL hmem)
 878 {
 879     GlobalLock( hmem );
 880 }
 881
 882
 883 /***********************************************************************
 884  *           GlobalUnfix   (KERNEL32.@)
 885  */
 886 VOID WINAPI GlobalUnfix(HGLOBAL hmem)
 887 {
 888    GlobalUnlock( hmem);
 889 }
 890
 891
 892 /***********************************************************************
 893  *           GlobalFlags   (KERNEL32.@)
 894  *
 895  * Get information about a global memory object.
 896  *
 897  * PARAMS
 898  *  hmem [I] Handle of the global memory object
 899  *
 900  * RETURNS
 901  *  Failure: GMEM_INVALID_HANDLE, when the provided handle is invalid
 902  *  Success: Value specifying allocation flags and lock count
 903  *
 904  */
 905 UINT WINAPI GlobalFlags(HGLOBAL hmem)
 906 {
 907    DWORD                retval;
 908    PGLOBAL32_INTERN     pintern;
 909
 910    if(ISPOINTER(hmem))
 911    {
 912       retval=0;
 913    }
 914    else
 915    {
 916       RtlLockHeap(GetProcessHeap());
 917       pintern=HANDLE_TO_INTERN(hmem);
 918       if(pintern->Magic==MAGIC_GLOBAL_USED)
 919       {
 920          retval=pintern->LockCount + (pintern->Flags<<8);
 921          if(pintern->Pointer==0)
 922             retval|= GMEM_DISCARDED;
 923       }
 924       else
 925       {
 926          WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 927          SetLastError(ERROR_INVALID_HANDLE);
 928          retval = GMEM_INVALID_HANDLE;
 929       }
 930       RtlUnlockHeap(GetProcessHeap());
 931    }
 932    return retval;
 933 }
 934
 935
 936 /***********************************************************************
 937  *           GlobalCompact   (KERNEL32.@)
 938  */
 939 SIZE_T WINAPI GlobalCompact( DWORD minfree )
 940 {
 941     return 0;  /* GlobalCompact does nothing in Win32 */
 942 }
 943
 944
 945 /***********************************************************************
 946  *           LocalAlloc   (KERNEL32.@)
 947  *
 948  * Allocate a local memory object.
 949  *
 950  * RETURNS
 951  *      Handle: Success
 952  *      NULL: Failure
 953  *
 954  * NOTES
 955  *  Windows memory management does not provide a separate local heap
 956  *  and global heap.
 957  */
 958 HLOCAL WINAPI LocalAlloc(
 959                 UINT flags, /* [in] Allocation attributes */
 960                 SIZE_T size /* [in] Number of bytes to allocate */
 961 ) {
 962     return GlobalAlloc( flags, size );
 963 }
 964
 965
 966 /***********************************************************************
 967  *           LocalCompact   (KERNEL32.@)
 968  */
 969 SIZE_T WINAPI LocalCompact( UINT minfree )
 970 {
 971     return 0;  /* LocalCompact does nothing in Win32 */
 972 }
 973
 974
 975 /***********************************************************************
 976  *           LocalFlags   (KERNEL32.@)
 977  *
 978  * Get information about a local memory object.
 979  *
 980  * RETURNS
 981  *      Value specifying allocation flags and lock count.
 982  *      LMEM_INVALID_HANDLE: Failure
 983  *
 984  * NOTES
 985  *  Windows memory management does not provide a separate local heap
 986  *  and global heap.
 987  */
 988 UINT WINAPI LocalFlags(
 989               HLOCAL handle /* [in] Handle of memory object */
 990 ) {
 991     return GlobalFlags( handle );
 992 }
 993
 994
 995 /***********************************************************************
 996  *           LocalFree   (KERNEL32.@)
 997  *
 998  * Free a local memory object.
 999  *
1000  * RETURNS
1001  *      NULL: Success
1002  *      Handle: Failure
1003  *
1004  * NOTES
1005  *  Windows memory management does not provide a separate local heap
1006  *  and global heap.
1007  */
1008 HLOCAL WINAPI LocalFree(
1009                 HLOCAL handle /* [in] Handle of memory object */
1010 ) {
1011     return GlobalFree( handle );
1012 }
1013
1014
1015 /***********************************************************************
1016  *           LocalHandle   (KERNEL32.@)
1017  *
1018  * Get the handle associated with the pointer to a local memory block.
1019  *
1020  * RETURNS
1021  *      Handle: Success
1022  *      NULL: Failure
1023  *
1024  * NOTES
1025  *  Windows memory management does not provide a separate local heap
1026  *  and global heap.
1027  */
1028 HLOCAL WINAPI LocalHandle(
1029                 LPCVOID ptr /* [in] Address of local memory block */
1030 ) {
1031     return GlobalHandle( ptr );
1032 }
1033
1034
1035 /***********************************************************************
1036  *           LocalLock   (KERNEL32.@)
1037  * Locks a local memory object and returns pointer to the first byte
1038  * of the memory block.
1039  *
1040  * RETURNS
1041  *      Pointer: Success
1042  *      NULL: Failure
1043  *
1044  * NOTES
1045  *  Windows memory management does not provide a separate local heap
1046  *  and global heap.
1047  */
1048 LPVOID WINAPI LocalLock(
1049               HLOCAL handle /* [in] Address of local memory object */
1050 ) {
1051     return GlobalLock( handle );
1052 }
1053
1054
1055 /***********************************************************************
1056  *           LocalReAlloc   (KERNEL32.@)
1057  *
1058  * Change the size or attributes of a local memory object.
1059  *
1060  * RETURNS
1061  *      Handle: Success
1062  *      NULL: Failure
1063  *
1064  * NOTES
1065  *  Windows memory management does not provide a separate local heap
1066  *  and global heap.
1067  */
1068 HLOCAL WINAPI LocalReAlloc(
1069                 HLOCAL handle, /* [in] Handle of memory object */
1070                 SIZE_T size,   /* [in] New size of block */
1071                 UINT flags     /* [in] How to reallocate object */
1072 ) {
1073     return GlobalReAlloc( handle, size, flags );
1074 }
1075
1076
1077 /***********************************************************************
1078  *           LocalShrink   (KERNEL32.@)
1079  */
1080 SIZE_T WINAPI LocalShrink( HGLOBAL handle, UINT newsize )
1081 {
1082     return 0;  /* LocalShrink does nothing in Win32 */
1083 }
1084
1085
1086 /***********************************************************************
1087  *           LocalSize   (KERNEL32.@)
1088  *
1089  * Get the size of a local memory object.
1090  *
1091  * RETURNS
1092  *      Size: Success
1093  *      0: Failure
1094  *
1095  * NOTES
1096  *  Windows memory management does not provide a separate local heap
1097  *  and global heap.
1098  */
1099 SIZE_T WINAPI LocalSize(
1100               HLOCAL handle /* [in] Handle of memory object */
1101 ) {
1102     return GlobalSize( handle );
1103 }
1104
1105
1106 /***********************************************************************
1107  *           LocalUnlock   (KERNEL32.@)
1108  *
1109  * Unlock a local memory object.
1110  *
1111  * RETURNS
1112  *      TRUE: Object is still locked
1113  *      FALSE: Object is unlocked
1114  *
1115  * NOTES
1116  *  Windows memory management does not provide a separate local heap
1117  *  and global heap.
1118  */
1119 BOOL WINAPI LocalUnlock(
1120               HLOCAL handle /* [in] Handle of memory object */
1121 )
1122 {
1123     if (ISPOINTER( handle ))
1124     {
1125         SetLastError( ERROR_NOT_LOCKED );
1126         return FALSE;
1127     }
1128
1129     return GlobalUnlock( handle );
1130 }
1131
1132
1133 /***********************************************************************
1134  *           GlobalMemoryStatusEx   (KERNEL32.@)
1135  * A version of GlobalMemoryStatus that can deal with memory over 4GB
1136  *
1137  * RETURNS
1138  *      TRUE
1139  */
1140 BOOL WINAPI GlobalMemoryStatusEx( LPMEMORYSTATUSEX lpmemex )
1141 {
1142     static MEMORYSTATUSEX       cached_memstatus;
1143     static int cache_lastchecked = 0;
1144     SYSTEM_INFO si;
1145 #ifdef linux
1146     FILE *f;
1147 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
1148     unsigned long val;
1149     int mib[2];
1150     size_t size_sys;
1151 #elif defined(__APPLE__)
1152     unsigned int val;
1153     int mib[2];
1154     size_t size_sys;
1155 #elif defined(sun)
1156     unsigned long pagesize,maxpages,freepages,swapspace,swapfree;
1157     struct anoninfo swapinf;
1158     int rval;
1159 #endif
1160
1161     if (lpmemex->dwLength != sizeof(*lpmemex))
1162     {
1163         SetLastError( ERROR_INVALID_PARAMETER );
1164         return FALSE;
1165     }
1166
1167     if (time(NULL)==cache_lastchecked) {
1168         *lpmemex = cached_memstatus;
1169         return TRUE;
1170     }
1171     cache_lastchecked = time(NULL);
1172
1173     lpmemex->dwMemoryLoad     = 0;
1174     lpmemex->ullTotalPhys     = 16*1024*1024;
1175     lpmemex->ullAvailPhys     = 16*1024*1024;
1176     lpmemex->ullTotalPageFile = 16*1024*1024;
1177     lpmemex->ullAvailPageFile = 16*1024*1024;
1178
1179 #ifdef linux
1180     f = fopen( "/proc/meminfo", "r" );
1181     if (f)
1182     {
1183         char buffer[256];
1184         unsigned long total, used, free, shared, buffers, cached;
1185
1186         lpmemex->ullTotalPhys = lpmemex->ullAvailPhys = 0;
1187         lpmemex->ullTotalPageFile = lpmemex->ullAvailPageFile = 0;
1188         while (fgets( buffer, sizeof(buffer), f ))
1189         {
1190             /* old style /proc/meminfo ... */
1191             if (sscanf( buffer, "Mem: %lu %lu %lu %lu %lu %lu",
1192                         &total, &used, &free, &shared, &buffers, &cached ))
1193             {
1194                 lpmemex->ullTotalPhys += total;
1195                 lpmemex->ullAvailPhys += free + buffers + cached;
1196             }
1197             if (sscanf( buffer, "Swap: %lu %lu %lu", &total, &used, &free ))
1198             {
1199                 lpmemex->ullTotalPageFile += total;
1200                 lpmemex->ullAvailPageFile += free;
1201             }
1202
1203             /* new style /proc/meminfo ... */
1204             if (sscanf(buffer, "MemTotal: %lu", &total))
1205                 lpmemex->ullTotalPhys = (ULONG64)total*1024;
1206             if (sscanf(buffer, "MemFree: %lu", &free))
1207                 lpmemex->ullAvailPhys = (ULONG64)free*1024;
1208             if (sscanf(buffer, "SwapTotal: %lu", &total))
1209                 lpmemex->ullTotalPageFile = (ULONG64)total*1024;
1210             if (sscanf(buffer, "SwapFree: %lu", &free))
1211                 lpmemex->ullAvailPageFile = (ULONG64)free*1024;
1212             if (sscanf(buffer, "Buffers: %lu", &buffers))
1213                 lpmemex->ullAvailPhys += (ULONG64)buffers*1024;
1214             if (sscanf(buffer, "Cached: %lu", &cached))
1215                 lpmemex->ullAvailPhys += (ULONG64)cached*1024;
1216         }
1217         fclose( f );
1218     }
1219 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
1220     mib[0] = CTL_HW;
1221     mib[1] = HW_PHYSMEM;
1222     size_sys = sizeof(val);
1223     sysctl(mib, 2, &val, &size_sys, NULL, 0);
1224     if (val) lpmemex->ullTotalPhys = val;
1225     mib[1] = HW_USERMEM;
1226     size_sys = sizeof(val);
1227     sysctl(mib, 2, &val, &size_sys, NULL, 0);
1228     if (!val) val = lpmemex->ullTotalPhys;
1229     lpmemex->ullAvailPhys = val;
1230     lpmemex->ullTotalPageFile = val;
1231     lpmemex->ullAvailPageFile = val;
1232 #elif defined ( sun )
1233     pagesize=sysconf(_SC_PAGESIZE);
1234     maxpages=sysconf(_SC_PHYS_PAGES);
1235     freepages=sysconf(_SC_AVPHYS_PAGES);
1236     rval=swapctl(SC_AINFO, &swapinf);
1237     if(rval >-1)
1238     {
1239         swapspace=swapinf.ani_max*pagesize;
1240         swapfree=swapinf.ani_free*pagesize;
1241     }else
1242     {
1243
1244         WARN("Swap size cannot be determined , assuming equal to physical memory\n");
1245         swapspace=maxpages*pagesize;
1246         swapfree=maxpages*pagesize;
1247     }
1248     lpmemex->ullTotalPhys=pagesize*maxpages;
1249     lpmemex->ullAvailPhys = pagesize*freepages;
1250     lpmemex->ullTotalPageFile = swapspace;
1251     lpmemex->ullAvailPageFile = swapfree;
1252 #endif
1253
1254     if (lpmemex->ullTotalPhys)
1255     {
1256         lpmemex->dwMemoryLoad = (lpmemex->ullTotalPhys-lpmemex->ullAvailPhys)
1257                                   / (lpmemex->ullTotalPhys / 100);
1258     }
1259
1260     /* Win98 returns only the swapsize in ullTotalPageFile/ullAvailPageFile,
1261        WinXP returns the size of physical memory + swapsize;
1262        mimic the behavior of XP.
1263        Note: Project2k refuses to start if it sees less than 1Mb of free swap.
1264     */
1265     lpmemex->ullTotalPageFile += lpmemex->ullTotalPhys;
1266     lpmemex->ullAvailPageFile += lpmemex->ullAvailPhys;
1267
1268     /* Titan Quest refuses to run if TotalPageFile <= ullTotalPhys */
1269     if(lpmemex->ullTotalPageFile == lpmemex->ullTotalPhys)
1270     {
1271         lpmemex->ullTotalPhys -= 1;
1272         lpmemex->ullAvailPhys -= 1;
1273     }
1274
1275     /* FIXME: should do something for other systems */
1276     GetSystemInfo(&si);
1277     lpmemex->ullTotalVirtual  = (ULONG_PTR)si.lpMaximumApplicationAddress-(ULONG_PTR)si.lpMinimumApplicationAddress;
1278     /* FIXME: we should track down all the already allocated VM pages and subtract them, for now arbitrarily remove 64KB so that it matches NT */
1279     lpmemex->ullAvailVirtual  = lpmemex->ullTotalVirtual-64*1024;
1280
1281     /* MSDN says about AvailExtendedVirtual: Size of unreserved and uncommitted
1282        memory in the extended portion of the virtual address space of the calling
1283        process, in bytes.
1284        However, I don't know what this means, so set it to zero :(
1285     */
1286     lpmemex->ullAvailExtendedVirtual = 0;
1287
1288     cached_memstatus = *lpmemex;
1289
1290     TRACE_(globalmem)("<-- LPMEMORYSTATUSEX: dwLength %d, dwMemoryLoad %d, ullTotalPhys %s, ullAvailPhys %s,"
1291           " ullTotalPageFile %s, ullAvailPageFile %s, ullTotalVirtual %s, ullAvailVirtual %s\n",
1292           lpmemex->dwLength, lpmemex->dwMemoryLoad, wine_dbgstr_longlong(lpmemex->ullTotalPhys),
1293           wine_dbgstr_longlong(lpmemex->ullAvailPhys), wine_dbgstr_longlong(lpmemex->ullTotalPageFile),
1294           wine_dbgstr_longlong(lpmemex->ullAvailPageFile), wine_dbgstr_longlong(lpmemex->ullTotalVirtual),
1295           wine_dbgstr_longlong(lpmemex->ullAvailVirtual) );
1296
1297     return TRUE;
1298 }
1299
1300 /***********************************************************************
1301  *           GlobalMemoryStatus   (KERNEL32.@)
1302  * Provides information about the status of the memory, so apps can tell
1303  * roughly how much they are able to allocate
1304  *
1305  * RETURNS
1306  *      None
1307  */
1308 VOID WINAPI GlobalMemoryStatus( LPMEMORYSTATUS lpBuffer )
1309 {
1310     MEMORYSTATUSEX memstatus;
1311     OSVERSIONINFOW osver;
1312     IMAGE_NT_HEADERS *nt = RtlImageNtHeader( GetModuleHandleW(0) );
1313
1314     /* Because GlobalMemoryStatus is identical to GlobalMemoryStatusEX save
1315        for one extra field in the struct, and the lack of a bug, we simply
1316        call GlobalMemoryStatusEx and copy the values across. */
1317     memstatus.dwLength = sizeof(memstatus);
1318     GlobalMemoryStatusEx(&memstatus);
1319
1320     lpBuffer->dwLength = sizeof(*lpBuffer);
1321     lpBuffer->dwMemoryLoad = memstatus.dwMemoryLoad;
1322
1323     /* Windows 2000 and later report -1 when values are greater than 4 Gb.
1324      * NT reports values modulo 4 Gb.
1325      */
1326
1327     osver.dwOSVersionInfoSize = sizeof(osver);
1328     GetVersionExW(&osver);
1329
1330     if ( osver.dwMajorVersion >= 5 || osver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS )
1331     {
1332         lpBuffer->dwTotalPhys = min( memstatus.ullTotalPhys, MAXDWORD );
1333         lpBuffer->dwAvailPhys = min( memstatus.ullAvailPhys, MAXDWORD );
1334         /* Limit value for apps that do not expect so much memory. Remove last 512 kb to make Sacrifice demo happy. */
1335         lpBuffer->dwTotalPageFile = min( memstatus.ullTotalPageFile, 0xfff7ffff );
1336         lpBuffer->dwAvailPageFile = min( memstatus.ullAvailPageFile, MAXDWORD );
1337         lpBuffer->dwTotalVirtual = min( memstatus.ullTotalVirtual, MAXDWORD );
1338         lpBuffer->dwAvailVirtual = min( memstatus.ullAvailVirtual, MAXDWORD );
1339
1340     }
1341     else /* duplicate NT bug */
1342     {
1343         lpBuffer->dwTotalPhys = memstatus.ullTotalPhys;
1344         lpBuffer->dwAvailPhys = memstatus.ullAvailPhys;
1345         lpBuffer->dwTotalPageFile = memstatus.ullTotalPageFile;
1346         lpBuffer->dwAvailPageFile = memstatus.ullAvailPageFile;
1347         lpBuffer->dwTotalVirtual = memstatus.ullTotalVirtual;
1348         lpBuffer->dwAvailVirtual = memstatus.ullAvailVirtual;
1349     }
1350
1351     /* values are limited to 2Gb unless the app has the IMAGE_FILE_LARGE_ADDRESS_AWARE flag */
1352     /* page file sizes are not limited (Adobe Illustrator 8 depends on this) */
1353     if (!(nt->FileHeader.Characteristics & IMAGE_FILE_LARGE_ADDRESS_AWARE))
1354     {
1355         if (lpBuffer->dwTotalPhys > MAXLONG) lpBuffer->dwTotalPhys = MAXLONG;
1356         if (lpBuffer->dwAvailPhys > MAXLONG) lpBuffer->dwAvailPhys = MAXLONG;
1357         if (lpBuffer->dwTotalVirtual > MAXLONG) lpBuffer->dwTotalVirtual = MAXLONG;
1358         if (lpBuffer->dwAvailVirtual > MAXLONG) lpBuffer->dwAvailVirtual = MAXLONG;
1359     }
1360
1361     /* work around for broken photoshop 4 installer */
1362     if ( lpBuffer->dwAvailPhys +  lpBuffer->dwAvailPageFile >= 2U*1024*1024*1024)
1363          lpBuffer->dwAvailPageFile = 2U*1024*1024*1024 -  lpBuffer->dwAvailPhys - 1;
1364
1365     /* limit page file size for really old binaries */
1366     if (nt->OptionalHeader.MajorSubsystemVersion < 4)
1367     {
1368         if (lpBuffer->dwTotalPageFile > MAXLONG) lpBuffer->dwTotalPageFile = MAXLONG;
1369         if (lpBuffer->dwAvailPageFile > MAXLONG) lpBuffer->dwAvailPageFile = MAXLONG;
1370     }
1371
1372     TRACE_(globalmem)("Length %u, MemoryLoad %u, TotalPhys %lx, AvailPhys %lx,"
1373           " TotalPageFile %lx, AvailPageFile %lx, TotalVirtual %lx, AvailVirtual %lx\n",
1374           lpBuffer->dwLength, lpBuffer->dwMemoryLoad, lpBuffer->dwTotalPhys,
1375           lpBuffer->dwAvailPhys, lpBuffer->dwTotalPageFile, lpBuffer->dwAvailPageFile,
1376           lpBuffer->dwTotalVirtual, lpBuffer->dwAvailVirtual );
1377 }