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
  68 /* address where we try to map the system heap */
  69 #define SYSTEM_HEAP_BASE  ((void*)0x80000000)
  70 #define SYSTEM_HEAP_SIZE  0x1000000   /* Default heap size = 16Mb */
  71
  72 static HANDLE systemHeap;   /* globally shared heap */
  73
  74
  75 /***********************************************************************
  76  *           HEAP_CreateSystemHeap
  77  *
  78  * Create the system heap.
  79  */
  80 static inline HANDLE HEAP_CreateSystemHeap(void)
  81 {
  82     int created;
  83     void *base;
  84     HANDLE map, event;
  85
  86     /* create the system heap event first */
  87     event = CreateEventA( NULL, TRUE, FALSE, "__wine_system_heap_event" );
  88
  89     if (!(map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE,
  90                                     0, SYSTEM_HEAP_SIZE, "__wine_system_heap" ))) return 0;
  91     created = (GetLastError() != ERROR_ALREADY_EXISTS);
  92
  93     if (!(base = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, SYSTEM_HEAP_BASE )))
  94     {
  95         /* pre-defined address not available */
  96         ERR( "system heap base address %p not available\n", SYSTEM_HEAP_BASE );
  97         return 0;
  98     }
  99
 100     if (created)  /* newly created heap */
 101     {
 102         systemHeap = RtlCreateHeap( HEAP_SHARED, base, SYSTEM_HEAP_SIZE,
 103                                     SYSTEM_HEAP_SIZE, NULL, NULL );
 104         SetEvent( event );
 105     }
 106     else
 107     {
 108         /* wait for the heap to be initialized */
 109         WaitForSingleObject( event, INFINITE );
 110         systemHeap = base;
 111     }
 112     CloseHandle( map );
 113     return systemHeap;
 114 }
 115
 116
 117 /***********************************************************************
 118  *           HeapCreate   (KERNEL32.@)
 119  *
 120  * Create a heap object.
 121  *
 122  * RETURNS
 123  *      Handle of heap: Success
 124  *      NULL: Failure
 125  */
 126 HANDLE WINAPI HeapCreate(
 127                 DWORD flags,       /* [in] Heap allocation flag */
 128                 SIZE_T initialSize, /* [in] Initial heap size */
 129                 SIZE_T maxSize      /* [in] Maximum heap size */
 130 ) {
 131     HANDLE ret;
 132
 133     if ( flags & HEAP_SHARED )
 134     {
 135         if (!systemHeap) HEAP_CreateSystemHeap();
 136         else WARN( "Shared Heap requested, returning system heap.\n" );
 137         ret = systemHeap;
 138     }
 139     else
 140     {
 141         ret = RtlCreateHeap( flags, NULL, maxSize, initialSize, NULL, NULL );
 142         if (!ret) SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 143     }
 144     return ret;
 145 }
 146
 147
 148 /***********************************************************************
 149  *           HeapDestroy   (KERNEL32.@)
 150  *
 151  * Destroy a heap object.
 152  *
 153  * RETURNS
 154  *      TRUE: Success
 155  *      FALSE: Failure
 156  */
 157 BOOL WINAPI HeapDestroy( HANDLE heap /* [in] Handle of heap */ )
 158 {
 159     if (heap == systemHeap)
 160     {
 161         WARN( "attempt to destroy system heap, returning TRUE!\n" );
 162         return TRUE;
 163     }
 164     if (!RtlDestroyHeap( heap )) return TRUE;
 165     SetLastError( ERROR_INVALID_HANDLE );
 166     return FALSE;
 167 }
 168
 169
 170 /***********************************************************************
 171  *           HeapCompact   (KERNEL32.@)
 172  */
 173 SIZE_T WINAPI HeapCompact( HANDLE heap, DWORD flags )
 174 {
 175     return RtlCompactHeap( heap, flags );
 176 }
 177
 178
 179 /***********************************************************************
 180  *           HeapValidate   (KERNEL32.@)
 181  * Validates a specified heap.
 182  *
 183  * NOTES
 184  *      Flags is ignored.
 185  *
 186  * RETURNS
 187  *      TRUE: Success
 188  *      FALSE: Failure
 189  */
 190 BOOL WINAPI HeapValidate(
 191               HANDLE heap, /* [in] Handle to the heap */
 192               DWORD flags,   /* [in] Bit flags that control access during operation */
 193               LPCVOID block  /* [in] Optional pointer to memory block to validate */
 194 ) {
 195     return RtlValidateHeap( heap, flags, block );
 196 }
 197
 198
 199 /***********************************************************************
 200  *           HeapWalk   (KERNEL32.@)
 201  * Enumerates the memory blocks in a specified heap.
 202  *
 203  * TODO
 204  *   - handling of PROCESS_HEAP_ENTRY_MOVEABLE and
 205  *     PROCESS_HEAP_ENTRY_DDESHARE (needs heap.c support)
 206  *
 207  * RETURNS
 208  *      TRUE: Success
 209  *      FALSE: Failure
 210  */
 211 BOOL WINAPI HeapWalk(
 212               HANDLE heap,               /* [in]  Handle to heap to enumerate */
 213               LPPROCESS_HEAP_ENTRY entry /* [out] Pointer to structure of enumeration info */
 214 ) {
 215     NTSTATUS ret = RtlWalkHeap( heap, entry );
 216     if (ret) SetLastError( RtlNtStatusToDosError(ret) );
 217     return !ret;
 218 }
 219
 220
 221 /***********************************************************************
 222  *           HeapLock   (KERNEL32.@)
 223  * Attempts to acquire the critical section object for a specified heap.
 224  *
 225  * RETURNS
 226  *      TRUE: Success
 227  *      FALSE: Failure
 228  */
 229 BOOL WINAPI HeapLock(
 230               HANDLE heap /* [in] Handle of heap to lock for exclusive access */
 231 ) {
 232     return RtlLockHeap( heap );
 233 }
 234
 235
 236 /***********************************************************************
 237  *           HeapUnlock   (KERNEL32.@)
 238  * Releases ownership of the critical section object.
 239  *
 240  * RETURNS
 241  *      TRUE: Success
 242  *      FALSE: Failure
 243  */
 244 BOOL WINAPI HeapUnlock(
 245               HANDLE heap /* [in] Handle to the heap to unlock */
 246 ) {
 247     return RtlUnlockHeap( heap );
 248 }
 249
 250
 251 /***********************************************************************
 252  *           GetProcessHeap    (KERNEL32.@)
 253  */
 254 HANDLE WINAPI GetProcessHeap(void)
 255 {
 256     return NtCurrentTeb()->Peb->ProcessHeap;
 257 }
 258
 259
 260 /***********************************************************************
 261  *           GetProcessHeaps    (KERNEL32.@)
 262  */
 263 DWORD WINAPI GetProcessHeaps( DWORD count, HANDLE *heaps )
 264 {
 265     return RtlGetProcessHeaps( count, heaps );
 266 }
 267
 268
 269 /* These are needed so that we can call the functions from inside kernel itself */
 270
 271 /***********************************************************************
 272  *           HeapAlloc    (KERNEL32.@)
 273  */
 274 LPVOID WINAPI HeapAlloc( HANDLE heap, DWORD flags, SIZE_T size )
 275 {
 276     return RtlAllocateHeap( heap, flags, size );
 277 }
 278
 279 BOOL WINAPI HeapFree( HANDLE heap, DWORD flags, LPVOID ptr )
 280 {
 281     return RtlFreeHeap( heap, flags, ptr );
 282 }
 283
 284 LPVOID WINAPI HeapReAlloc( HANDLE heap, DWORD flags, LPVOID ptr, SIZE_T size )
 285 {
 286     return RtlReAllocateHeap( heap, flags, ptr, size );
 287 }
 288
 289 SIZE_T WINAPI HeapSize( HANDLE heap, DWORD flags, LPCVOID ptr )
 290 {
 291     return RtlSizeHeap( heap, flags, ptr );
 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)  ((HGLOBAL) &((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      8  /* 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       RtlLockHeap(GetProcessHeap());
 374
 375       pintern = HeapAlloc(GetProcessHeap(), 0, sizeof(GLOBAL32_INTERN));
 376       if (pintern)
 377       {
 378           pintern->Magic = MAGIC_GLOBAL_USED;
 379           pintern->Flags = flags >> 8;
 380           pintern->LockCount = 0;
 381
 382           if (size)
 383           {
 384               palloc = HeapAlloc(GetProcessHeap(), hpflags, size+HGLOBAL_STORAGE);
 385               if (!palloc)
 386               {
 387                   HeapFree(GetProcessHeap(), 0, pintern);
 388                   pintern = NULL;
 389               }
 390               else
 391               {
 392                   *(HGLOBAL *)palloc = INTERN_TO_HANDLE(pintern);
 393                   pintern->Pointer = (char *)palloc + HGLOBAL_STORAGE;
 394               }
 395           }
 396           else
 397               pintern->Pointer = NULL;
 398       }
 399
 400       RtlUnlockHeap(GetProcessHeap());
 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    DWORD                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    else
 823    {
 824       RtlLockHeap(GetProcessHeap());
 825       pintern=HANDLE_TO_INTERN(hmem);
 826
 827       if(pintern->Magic==MAGIC_GLOBAL_USED)
 828       {
 829          if (!pintern->Pointer) /* handle case of GlobalAlloc( ??,0) */
 830              retval = 0;
 831          else
 832          {
 833              retval = HeapSize(GetProcessHeap(), 0,
 834                          (char *)(pintern->Pointer) - HGLOBAL_STORAGE );
 835              if (retval != (DWORD)-1) retval -= HGLOBAL_STORAGE;
 836          }
 837       }
 838       else
 839       {
 840          WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 841          SetLastError(ERROR_INVALID_HANDLE);
 842          retval=0;
 843       }
 844       RtlUnlockHeap(GetProcessHeap());
 845    }
 846    /* HeapSize returns 0xffffffff on failure */
 847    if (retval == 0xffffffff) retval = 0;
 848    return retval;
 849 }
 850
 851
 852 /***********************************************************************
 853  *           GlobalWire   (KERNEL32.@)
 854  */
 855 LPVOID WINAPI GlobalWire(HGLOBAL hmem)
 856 {
 857    return GlobalLock( hmem );
 858 }
 859
 860
 861 /***********************************************************************
 862  *           GlobalUnWire   (KERNEL32.@)
 863  */
 864 BOOL WINAPI GlobalUnWire(HGLOBAL hmem)
 865 {
 866    return GlobalUnlock( hmem);
 867 }
 868
 869
 870 /***********************************************************************
 871  *           GlobalFix   (KERNEL32.@)
 872  */
 873 VOID WINAPI GlobalFix(HGLOBAL hmem)
 874 {
 875     GlobalLock( hmem );
 876 }
 877
 878
 879 /***********************************************************************
 880  *           GlobalUnfix   (KERNEL32.@)
 881  */
 882 VOID WINAPI GlobalUnfix(HGLOBAL hmem)
 883 {
 884    GlobalUnlock( hmem);
 885 }
 886
 887
 888 /***********************************************************************
 889  *           GlobalFlags   (KERNEL32.@)
 890  *
 891  * Get information about a global memory object.
 892  *
 893  * PARAMS
 894  *  hmem [I] Handle of the global memory object
 895  *
 896  * RETURNS
 897  *  Failure: GMEM_INVALID_HANDLE, when the provided handle is invalid
 898  *  Success: Value specifying allocation flags and lock count
 899  *
 900  */
 901 UINT WINAPI GlobalFlags(HGLOBAL hmem)
 902 {
 903    DWORD                retval;
 904    PGLOBAL32_INTERN     pintern;
 905
 906    if(ISPOINTER(hmem))
 907    {
 908       retval=0;
 909    }
 910    else
 911    {
 912       RtlLockHeap(GetProcessHeap());
 913       pintern=HANDLE_TO_INTERN(hmem);
 914       if(pintern->Magic==MAGIC_GLOBAL_USED)
 915       {
 916          retval=pintern->LockCount + (pintern->Flags<<8);
 917          if(pintern->Pointer==0)
 918             retval|= GMEM_DISCARDED;
 919       }
 920       else
 921       {
 922          WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 923          SetLastError(ERROR_INVALID_HANDLE);
 924          retval = GMEM_INVALID_HANDLE;
 925       }
 926       RtlUnlockHeap(GetProcessHeap());
 927    }
 928    return retval;
 929 }
 930
 931
 932 /***********************************************************************
 933  *           GlobalCompact   (KERNEL32.@)
 934  */
 935 SIZE_T WINAPI GlobalCompact( DWORD minfree )
 936 {
 937     return 0;  /* GlobalCompact does nothing in Win32 */
 938 }
 939
 940
 941 /***********************************************************************
 942  *           LocalAlloc   (KERNEL32.@)
 943  *
 944  * Allocate a local memory object.
 945  *
 946  * RETURNS
 947  *      Handle: Success
 948  *      NULL: Failure
 949  *
 950  * NOTES
 951  *  Windows memory management does not provide a separate local heap
 952  *  and global heap.
 953  */
 954 HLOCAL WINAPI LocalAlloc(
 955                 UINT flags, /* [in] Allocation attributes */
 956                 SIZE_T size /* [in] Number of bytes to allocate */
 957 ) {
 958     return GlobalAlloc( flags, size );
 959 }
 960
 961
 962 /***********************************************************************
 963  *           LocalCompact   (KERNEL32.@)
 964  */
 965 SIZE_T WINAPI LocalCompact( UINT minfree )
 966 {
 967     return 0;  /* LocalCompact does nothing in Win32 */
 968 }
 969
 970
 971 /***********************************************************************
 972  *           LocalFlags   (KERNEL32.@)
 973  *
 974  * Get information about a local memory object.
 975  *
 976  * RETURNS
 977  *      Value specifying allocation flags and lock count.
 978  *      LMEM_INVALID_HANDLE: Failure
 979  *
 980  * NOTES
 981  *  Windows memory management does not provide a separate local heap
 982  *  and global heap.
 983  */
 984 UINT WINAPI LocalFlags(
 985               HLOCAL handle /* [in] Handle of memory object */
 986 ) {
 987     return GlobalFlags( handle );
 988 }
 989
 990
 991 /***********************************************************************
 992  *           LocalFree   (KERNEL32.@)
 993  *
 994  * Free a local memory object.
 995  *
 996  * RETURNS
 997  *      NULL: Success
 998  *      Handle: Failure
 999  *
1000  * NOTES
1001  *  Windows memory management does not provide a separate local heap
1002  *  and global heap.
1003  */
1004 HLOCAL WINAPI LocalFree(
1005                 HLOCAL handle /* [in] Handle of memory object */
1006 ) {
1007     return GlobalFree( handle );
1008 }
1009
1010
1011 /***********************************************************************
1012  *           LocalHandle   (KERNEL32.@)
1013  *
1014  * Get the handle associated with the pointer to a local memory block.
1015  *
1016  * RETURNS
1017  *      Handle: Success
1018  *      NULL: Failure
1019  *
1020  * NOTES
1021  *  Windows memory management does not provide a separate local heap
1022  *  and global heap.
1023  */
1024 HLOCAL WINAPI LocalHandle(
1025                 LPCVOID ptr /* [in] Address of local memory block */
1026 ) {
1027     return GlobalHandle( ptr );
1028 }
1029
1030
1031 /***********************************************************************
1032  *           LocalLock   (KERNEL32.@)
1033  * Locks a local memory object and returns pointer to the first byte
1034  * of the memory block.
1035  *
1036  * RETURNS
1037  *      Pointer: Success
1038  *      NULL: Failure
1039  *
1040  * NOTES
1041  *  Windows memory management does not provide a separate local heap
1042  *  and global heap.
1043  */
1044 LPVOID WINAPI LocalLock(
1045               HLOCAL handle /* [in] Address of local memory object */
1046 ) {
1047     return GlobalLock( handle );
1048 }
1049
1050
1051 /***********************************************************************
1052  *           LocalReAlloc   (KERNEL32.@)
1053  *
1054  * Change the size or attributes of a local memory object.
1055  *
1056  * RETURNS
1057  *      Handle: Success
1058  *      NULL: Failure
1059  *
1060  * NOTES
1061  *  Windows memory management does not provide a separate local heap
1062  *  and global heap.
1063  */
1064 HLOCAL WINAPI LocalReAlloc(
1065                 HLOCAL handle, /* [in] Handle of memory object */
1066                 SIZE_T size,   /* [in] New size of block */
1067                 UINT flags     /* [in] How to reallocate object */
1068 ) {
1069     return GlobalReAlloc( handle, size, flags );
1070 }
1071
1072
1073 /***********************************************************************
1074  *           LocalShrink   (KERNEL32.@)
1075  */
1076 SIZE_T WINAPI LocalShrink( HGLOBAL handle, UINT newsize )
1077 {
1078     return 0;  /* LocalShrink does nothing in Win32 */
1079 }
1080
1081
1082 /***********************************************************************
1083  *           LocalSize   (KERNEL32.@)
1084  *
1085  * Get the size of a local memory object.
1086  *
1087  * RETURNS
1088  *      Size: Success
1089  *      0: Failure
1090  *
1091  * NOTES
1092  *  Windows memory management does not provide a separate local heap
1093  *  and global heap.
1094  */
1095 SIZE_T WINAPI LocalSize(
1096               HLOCAL handle /* [in] Handle of memory object */
1097 ) {
1098     return GlobalSize( handle );
1099 }
1100
1101
1102 /***********************************************************************
1103  *           LocalUnlock   (KERNEL32.@)
1104  *
1105  * Unlock a local memory object.
1106  *
1107  * RETURNS
1108  *      TRUE: Object is still locked
1109  *      FALSE: Object is unlocked
1110  *
1111  * NOTES
1112  *  Windows memory management does not provide a separate local heap
1113  *  and global heap.
1114  */
1115 BOOL WINAPI LocalUnlock(
1116               HLOCAL handle /* [in] Handle of memory object */
1117 ) {
1118     return GlobalUnlock( handle );
1119 }
1120
1121
1122 /**********************************************************************
1123  *              AllocMappedBuffer       (KERNEL32.38)
1124  *
1125  * This is an undocumented KERNEL32 function that
1126  * SMapLS's a GlobalAlloc'ed buffer.
1127  *
1128  * RETURNS
1129  *       EDI register: pointer to buffer
1130  *
1131  * NOTES
1132  *       The buffer is preceded by 8 bytes:
1133  *        ...
1134  *       edi+0   buffer
1135  *       edi-4   SEGPTR to buffer
1136  *       edi-8   some magic Win95 needs for SUnMapLS
1137  *               (we use it for the memory handle)
1138  *
1139  *       The SEGPTR is used by the caller!
1140  */
1141 void WINAPI __regs_AllocMappedBuffer(
1142               CONTEXT86 *context /* [in] EDI register: size of buffer to allocate */
1143 ) {
1144     HGLOBAL handle = GlobalAlloc(0, context->Edi + 8);
1145     DWORD *buffer = (DWORD *)GlobalLock(handle);
1146     DWORD ptr = 0;
1147
1148     if (buffer)
1149         if (!(ptr = MapLS(buffer + 2)))
1150         {
1151             GlobalUnlock(handle);
1152             GlobalFree(handle);
1153         }
1154
1155     if (!ptr)
1156         context->Eax = context->Edi = 0;
1157     else
1158     {
1159         buffer[0] = (DWORD)handle;
1160         buffer[1] = ptr;
1161
1162         context->Eax = ptr;
1163         context->Edi = (DWORD)(buffer + 2);
1164     }
1165 }
1166 #ifdef DEFINE_REGS_ENTRYPOINT
1167 DEFINE_REGS_ENTRYPOINT( AllocMappedBuffer, 0, 0 )
1168 #endif
1169
1170 /**********************************************************************
1171  *              FreeMappedBuffer        (KERNEL32.39)
1172  *
1173  * Free a buffer allocated by AllocMappedBuffer
1174  *
1175  * RETURNS
1176  *  Nothing.
1177  */
1178 void WINAPI __regs_FreeMappedBuffer(
1179               CONTEXT86 *context /* [in] EDI register: pointer to buffer */
1180 ) {
1181     if (context->Edi)
1182     {
1183         DWORD *buffer = (DWORD *)context->Edi - 2;
1184
1185         UnMapLS(buffer[1]);
1186
1187         GlobalUnlock((HGLOBAL)buffer[0]);
1188         GlobalFree((HGLOBAL)buffer[0]);
1189     }
1190 }
1191 #ifdef DEFINE_REGS_ENTRYPOINT
1192 DEFINE_REGS_ENTRYPOINT( FreeMappedBuffer, 0, 0 )
1193 #endif
1194
1195 /***********************************************************************
1196  *           GlobalMemoryStatusEx   (KERNEL32.@)
1197  * A version of GlobalMemoryStatus that can deal with memory over 4GB
1198  *
1199  * RETURNS
1200  *      TRUE
1201  */
1202 BOOL WINAPI GlobalMemoryStatusEx( LPMEMORYSTATUSEX lpmemex )
1203 {
1204     static MEMORYSTATUSEX       cached_memstatus;
1205     static int cache_lastchecked = 0;
1206     SYSTEM_INFO si;
1207 #ifdef linux
1208     FILE *f;
1209 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
1210     unsigned long val;
1211     int mib[2];
1212     size_t size_sys;
1213 #elif defined(__APPLE__)
1214     unsigned int val;
1215     int mib[2];
1216     size_t size_sys;
1217 #elif defined(sun)
1218     unsigned long pagesize,maxpages,freepages,swapspace,swapfree;
1219     struct anoninfo swapinf;
1220     int rval;
1221 #endif
1222
1223     if (lpmemex->dwLength != sizeof(*lpmemex))
1224     {
1225         SetLastError( ERROR_INVALID_PARAMETER );
1226         return FALSE;
1227     }
1228
1229     if (time(NULL)==cache_lastchecked) {
1230         *lpmemex = cached_memstatus;
1231         return TRUE;
1232     }
1233     cache_lastchecked = time(NULL);
1234
1235     lpmemex->dwMemoryLoad     = 0;
1236     lpmemex->ullTotalPhys     = 16*1024*1024;
1237     lpmemex->ullAvailPhys     = 16*1024*1024;
1238     lpmemex->ullTotalPageFile = 16*1024*1024;
1239     lpmemex->ullAvailPageFile = 16*1024*1024;
1240
1241 #ifdef linux
1242     f = fopen( "/proc/meminfo", "r" );
1243     if (f)
1244     {
1245         char buffer[256];
1246         unsigned long total, used, free, shared, buffers, cached;
1247
1248         lpmemex->ullTotalPhys = lpmemex->ullAvailPhys = 0;
1249         lpmemex->ullTotalPageFile = lpmemex->ullAvailPageFile = 0;
1250         while (fgets( buffer, sizeof(buffer), f ))
1251         {
1252             /* old style /proc/meminfo ... */
1253             if (sscanf( buffer, "Mem: %lu %lu %lu %lu %lu %lu",
1254                         &total, &used, &free, &shared, &buffers, &cached ))
1255             {
1256                 lpmemex->ullTotalPhys += total;
1257                 lpmemex->ullAvailPhys += free + buffers + cached;
1258             }
1259             if (sscanf( buffer, "Swap: %lu %lu %lu", &total, &used, &free ))
1260             {
1261                 lpmemex->ullTotalPageFile += total;
1262                 lpmemex->ullAvailPageFile += free;
1263             }
1264
1265             /* new style /proc/meminfo ... */
1266             if (sscanf(buffer, "MemTotal: %lu", &total))
1267                 lpmemex->ullTotalPhys = total*1024;
1268             if (sscanf(buffer, "MemFree: %lu", &free))
1269                 lpmemex->ullAvailPhys = free*1024;
1270             if (sscanf(buffer, "SwapTotal: %lu", &total))
1271                 lpmemex->ullTotalPageFile = total*1024;
1272             if (sscanf(buffer, "SwapFree: %lu", &free))
1273                 lpmemex->ullAvailPageFile = free*1024;
1274             if (sscanf(buffer, "Buffers: %lu", &buffers))
1275                 lpmemex->ullAvailPhys += buffers*1024;
1276             if (sscanf(buffer, "Cached: %lu", &cached))
1277                 lpmemex->ullAvailPhys += cached*1024;
1278         }
1279         fclose( f );
1280     }
1281 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__APPLE__)
1282     mib[0] = CTL_HW;
1283     mib[1] = HW_PHYSMEM;
1284     size_sys = sizeof(val);
1285     sysctl(mib, 2, &val, &size_sys, NULL, 0);
1286     if (val) lpmemex->ullTotalPhys = val;
1287     mib[1] = HW_USERMEM;
1288     size_sys = sizeof(val);
1289     sysctl(mib, 2, &val, &size_sys, NULL, 0);
1290     if (!val) val = lpmemex->ullTotalPhys;
1291     lpmemex->ullAvailPhys = val;
1292     lpmemex->ullTotalPageFile = val;
1293     lpmemex->ullAvailPageFile = val;
1294 #elif defined ( sun )
1295     pagesize=sysconf(_SC_PAGESIZE);
1296     maxpages=sysconf(_SC_PHYS_PAGES);
1297     freepages=sysconf(_SC_AVPHYS_PAGES);
1298     rval=swapctl(SC_AINFO, &swapinf);
1299     if(rval >-1)
1300     {
1301         swapspace=swapinf.ani_max*pagesize;
1302         swapfree=swapinf.ani_free*pagesize;
1303     }else
1304     {
1305
1306         WARN("Swap size cannot be determined , assuming equal to physical memory\n");
1307         swapspace=maxpages*pagesize;
1308         swapfree=maxpages*pagesize;
1309     }
1310     lpmemex->ullTotalPhys=pagesize*maxpages;
1311     lpmemex->ullAvailPhys = pagesize*freepages;
1312     lpmemex->ullTotalPageFile = swapspace;
1313     lpmemex->ullAvailPageFile = swapfree;
1314 #endif
1315
1316     if (lpmemex->ullTotalPhys)
1317     {
1318         lpmemex->dwMemoryLoad = (lpmemex->ullTotalPhys-lpmemex->ullAvailPhys)
1319                                   / (lpmemex->ullTotalPhys / 100);
1320     }
1321
1322     /* Win98 returns only the swapsize in ullTotalPageFile/ullAvailPageFile,
1323        WinXP returns the size of physical memory + swapsize;
1324        mimic the behavior of XP.
1325        Note: Project2k refuses to start if it sees less than 1Mb of free swap.
1326     */
1327     lpmemex->ullTotalPageFile += lpmemex->ullTotalPhys;
1328     lpmemex->ullAvailPageFile += lpmemex->ullAvailPhys;
1329
1330     /* Titan Quest refuses to run if TotalPageFile <= ullTotalPhys */
1331     if(lpmemex->ullTotalPageFile == lpmemex->ullTotalPhys)
1332     {
1333         lpmemex->ullTotalPhys -= 1;
1334         lpmemex->ullAvailPhys -= 1;
1335     }
1336
1337     /* FIXME: should do something for other systems */
1338     GetSystemInfo(&si);
1339     lpmemex->ullTotalVirtual  = (char*)si.lpMaximumApplicationAddress-(char*)si.lpMinimumApplicationAddress;
1340     /* FIXME: we should track down all the already allocated VM pages and substract them, for now arbitrarily remove 64KB so that it matches NT */
1341     lpmemex->ullAvailVirtual  = lpmemex->ullTotalVirtual-64*1024;
1342
1343     /* MSDN says about AvailExtendedVirtual: Size of unreserved and uncommitted
1344        memory in the extended portion of the virtual address space of the calling
1345        process, in bytes.
1346        However, I don't know what this means, so set it to zero :(
1347     */
1348     lpmemex->ullAvailExtendedVirtual = 0;
1349
1350     cached_memstatus = *lpmemex;
1351
1352     TRACE("<-- LPMEMORYSTATUSEX: dwLength %d, dwMemoryLoad %d, ullTotalPhys %s, ullAvailPhys %s,"
1353           " ullTotalPageFile %s, ullAvailPageFile %s, ullTotalVirtual %s, ullAvailVirtual %s\n",
1354           lpmemex->dwLength, lpmemex->dwMemoryLoad, wine_dbgstr_longlong(lpmemex->ullTotalPhys),
1355           wine_dbgstr_longlong(lpmemex->ullAvailPhys), wine_dbgstr_longlong(lpmemex->ullTotalPageFile),
1356           wine_dbgstr_longlong(lpmemex->ullAvailPageFile), wine_dbgstr_longlong(lpmemex->ullTotalVirtual),
1357           wine_dbgstr_longlong(lpmemex->ullAvailVirtual) );
1358
1359     return TRUE;
1360 }
1361
1362 /***********************************************************************
1363  *           GlobalMemoryStatus   (KERNEL32.@)
1364  * Provides information about the status of the memory, so apps can tell
1365  * roughly how much they are able to allocate
1366  *
1367  * RETURNS
1368  *      None
1369  */
1370 VOID WINAPI GlobalMemoryStatus( LPMEMORYSTATUS lpBuffer )
1371 {
1372     MEMORYSTATUSEX memstatus;
1373     OSVERSIONINFOW osver;
1374     IMAGE_NT_HEADERS *nt = RtlImageNtHeader( GetModuleHandleW(0) );
1375
1376     /* Because GlobalMemoryStatus is identical to GlobalMemoryStatusEX save
1377        for one extra field in the struct, and the lack of a bug, we simply
1378        call GlobalMemoryStatusEx and copy the values across. */
1379     memstatus.dwLength = sizeof(memstatus);
1380     GlobalMemoryStatusEx(&memstatus);
1381
1382     lpBuffer->dwLength = sizeof(*lpBuffer);
1383     lpBuffer->dwMemoryLoad = memstatus.dwMemoryLoad;
1384
1385     /* Windows 2000 and later report -1 when values are greater than 4 Gb.
1386      * NT reports values modulo 4 Gb.
1387      */
1388
1389     osver.dwOSVersionInfoSize = sizeof(osver);
1390     GetVersionExW(&osver);
1391
1392     if ( osver.dwMajorVersion >= 5 )
1393     {
1394         lpBuffer->dwTotalPhys = min( memstatus.ullTotalPhys, MAXDWORD );
1395         lpBuffer->dwAvailPhys = min( memstatus.ullAvailPhys, MAXDWORD );
1396         lpBuffer->dwTotalPageFile = min( memstatus.ullTotalPageFile, MAXDWORD );
1397         lpBuffer->dwAvailPageFile = min( memstatus.ullAvailPageFile, MAXDWORD );
1398         lpBuffer->dwTotalVirtual = min( memstatus.ullTotalVirtual, MAXDWORD );
1399         lpBuffer->dwAvailVirtual = min( memstatus.ullAvailVirtual, MAXDWORD );
1400
1401     }
1402     else        /* duplicate NT bug */
1403     {
1404         lpBuffer->dwTotalPhys = memstatus.ullTotalPhys;
1405         lpBuffer->dwAvailPhys = memstatus.ullAvailPhys;
1406         lpBuffer->dwTotalPageFile = memstatus.ullTotalPageFile;
1407         lpBuffer->dwAvailPageFile = memstatus.ullAvailPageFile;
1408         lpBuffer->dwTotalVirtual = memstatus.ullTotalVirtual;
1409         lpBuffer->dwAvailVirtual = memstatus.ullAvailVirtual;
1410     }
1411
1412     /* values are limited to 2Gb unless the app has the IMAGE_FILE_LARGE_ADDRESS_AWARE flag */
1413     /* page file sizes are not limited (Adobe Illustrator 8 depends on this) */
1414     if (!(nt->FileHeader.Characteristics & IMAGE_FILE_LARGE_ADDRESS_AWARE))
1415     {
1416         if (lpBuffer->dwTotalPhys > MAXLONG) lpBuffer->dwTotalPhys = MAXLONG;
1417         if (lpBuffer->dwAvailPhys > MAXLONG) lpBuffer->dwAvailPhys = MAXLONG;
1418         if (lpBuffer->dwTotalVirtual > MAXLONG) lpBuffer->dwTotalVirtual = MAXLONG;
1419         if (lpBuffer->dwAvailVirtual > MAXLONG) lpBuffer->dwAvailVirtual = MAXLONG;
1420     }
1421
1422     /* work around for broken photoshop 4 installer */
1423     if ( lpBuffer->dwAvailPhys +  lpBuffer->dwAvailPageFile >= 2U*1024*1024*1024)
1424          lpBuffer->dwAvailPageFile = 2U*1024*1024*1024 -  lpBuffer->dwAvailPhys - 1;
1425
1426     /* limit page file size for really old binaries */
1427     if (nt->OptionalHeader.MajorSubsystemVersion < 4)
1428     {
1429         if (lpBuffer->dwTotalPageFile > MAXLONG) lpBuffer->dwTotalPageFile = MAXLONG;
1430         if (lpBuffer->dwAvailPageFile > MAXLONG) lpBuffer->dwAvailPageFile = MAXLONG;
1431     }
1432
1433     TRACE("Length %u, MemoryLoad %u, TotalPhys %lx, AvailPhys %lx,"
1434           " TotalPageFile %lx, AvailPageFile %lx, TotalVirtual %lx, AvailVirtual %lx\n",
1435           lpBuffer->dwLength, lpBuffer->dwMemoryLoad, lpBuffer->dwTotalPhys,
1436           lpBuffer->dwAvailPhys, lpBuffer->dwTotalPageFile, lpBuffer->dwAvailPageFile,
1437           lpBuffer->dwTotalVirtual, lpBuffer->dwAvailVirtual );
1438 }