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 #ifdef HAVE_MACH_MACH_H
  44 #include <mach/mach.h>
  45 #endif
  46
  47 #ifdef sun
  48 /* FIXME:  Unfortunately swapctl can't be used with largefile.... */
  49 # undef _FILE_OFFSET_BITS
  50 # define _FILE_OFFSET_BITS 32
  51 # ifdef HAVE_SYS_RESOURCE_H
  52 #  include <sys/resource.h>
  53 # endif
  54 # ifdef HAVE_SYS_STAT_H
  55 #  include <sys/stat.h>
  56 # endif
  57 # include <sys/swap.h>
  58 #endif
  59
  60
  61 #include "windef.h"
  62 #include "winbase.h"
  63 #include "winerror.h"
  64 #include "winnt.h"
  65 #include "winternl.h"
  66 #include "wine/exception.h"
  67 #include "wine/debug.h"
  68
  69 WINE_DEFAULT_DEBUG_CHANNEL(heap);
  70 WINE_DECLARE_DEBUG_CHANNEL(globalmem);
  71
  72 /* address where we try to map the system heap */
  73 #define SYSTEM_HEAP_BASE  ((void*)0x80000000)
  74 #define SYSTEM_HEAP_SIZE  0x1000000   /* Default heap size = 16Mb */
  75
  76 static HANDLE systemHeap;   /* globally shared heap */
  77
  78
  79 /***********************************************************************
  80  *           HEAP_CreateSystemHeap
  81  *
  82  * Create the system heap.
  83  */
  84 static inline HANDLE HEAP_CreateSystemHeap(void)
  85 {
  86     int created;
  87     void *base;
  88     HANDLE map, event;
  89
  90     /* create the system heap event first */
  91     event = CreateEventA( NULL, TRUE, FALSE, "__wine_system_heap_event" );
  92
  93     if (!(map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE,
  94                                     0, SYSTEM_HEAP_SIZE, "__wine_system_heap" ))) return 0;
  95     created = (GetLastError() != ERROR_ALREADY_EXISTS);
  96
  97     if (!(base = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, SYSTEM_HEAP_BASE )))
  98     {
  99         /* pre-defined address not available */
 100         ERR( "system heap base address %p not available\n", SYSTEM_HEAP_BASE );
 101         return 0;
 102     }
 103
 104     if (created)  /* newly created heap */
 105     {
 106         systemHeap = RtlCreateHeap( HEAP_SHARED, base, SYSTEM_HEAP_SIZE,
 107                                     SYSTEM_HEAP_SIZE, NULL, NULL );
 108         SetEvent( event );
 109     }
 110     else
 111     {
 112         /* wait for the heap to be initialized */
 113         WaitForSingleObject( event, INFINITE );
 114         systemHeap = base;
 115     }
 116     CloseHandle( map );
 117     return systemHeap;
 118 }
 119
 120
 121 /***********************************************************************
 122  *           HeapCreate   (KERNEL32.@)
 123  *
 124  * Create a heap object.
 125  *
 126  * RETURNS
 127  *      Handle of heap: Success
 128  *      NULL: Failure
 129  */
 130 HANDLE WINAPI HeapCreate(
 131                 DWORD flags,       /* [in] Heap allocation flag */
 132                 SIZE_T initialSize, /* [in] Initial heap size */
 133                 SIZE_T maxSize      /* [in] Maximum heap size */
 134 ) {
 135     HANDLE ret;
 136
 137     if ( flags & HEAP_SHARED )
 138     {
 139         if (!systemHeap) HEAP_CreateSystemHeap();
 140         else WARN( "Shared Heap requested, returning system heap.\n" );
 141         ret = systemHeap;
 142     }
 143     else
 144     {
 145         ret = RtlCreateHeap( flags, NULL, maxSize, initialSize, NULL, NULL );
 146         if (!ret) SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 147     }
 148     return ret;
 149 }
 150
 151
 152 /***********************************************************************
 153  *           HeapDestroy   (KERNEL32.@)
 154  *
 155  * Destroy a heap object.
 156  *
 157  * RETURNS
 158  *      TRUE: Success
 159  *      FALSE: Failure
 160  */
 161 BOOL WINAPI HeapDestroy( HANDLE heap /* [in] Handle of heap */ )
 162 {
 163     if (heap == systemHeap)
 164     {
 165         WARN( "attempt to destroy system heap, returning TRUE!\n" );
 166         return TRUE;
 167     }
 168     if (!RtlDestroyHeap( heap )) return TRUE;
 169     SetLastError( ERROR_INVALID_HANDLE );
 170     return FALSE;
 171 }
 172
 173
 174 /***********************************************************************
 175  *           HeapCompact   (KERNEL32.@)
 176  */
 177 SIZE_T WINAPI HeapCompact( HANDLE heap, DWORD flags )
 178 {
 179     return RtlCompactHeap( heap, flags );
 180 }
 181
 182
 183 /***********************************************************************
 184  *           HeapValidate   (KERNEL32.@)
 185  * Validates a specified heap.
 186  *
 187  * NOTES
 188  *      Flags is ignored.
 189  *
 190  * RETURNS
 191  *      TRUE: Success
 192  *      FALSE: Failure
 193  */
 194 BOOL WINAPI HeapValidate(
 195               HANDLE heap, /* [in] Handle to the heap */
 196               DWORD flags,   /* [in] Bit flags that control access during operation */
 197               LPCVOID block  /* [in] Optional pointer to memory block to validate */
 198 ) {
 199     return RtlValidateHeap( heap, flags, block );
 200 }
 201
 202
 203 /***********************************************************************
 204  *           HeapWalk   (KERNEL32.@)
 205  * Enumerates the memory blocks in a specified heap.
 206  *
 207  * TODO
 208  *   - handling of PROCESS_HEAP_ENTRY_MOVEABLE and
 209  *     PROCESS_HEAP_ENTRY_DDESHARE (needs heap.c support)
 210  *
 211  * RETURNS
 212  *      TRUE: Success
 213  *      FALSE: Failure
 214  */
 215 BOOL WINAPI HeapWalk(
 216               HANDLE heap,               /* [in]  Handle to heap to enumerate */
 217               LPPROCESS_HEAP_ENTRY entry /* [out] Pointer to structure of enumeration info */
 218 ) {
 219     NTSTATUS ret = RtlWalkHeap( heap, entry );
 220     if (ret) SetLastError( RtlNtStatusToDosError(ret) );
 221     return !ret;
 222 }
 223
 224
 225 /***********************************************************************
 226  *           HeapLock   (KERNEL32.@)
 227  * Attempts to acquire the critical section object for a specified heap.
 228  *
 229  * RETURNS
 230  *      TRUE: Success
 231  *      FALSE: Failure
 232  */
 233 BOOL WINAPI HeapLock(
 234               HANDLE heap /* [in] Handle of heap to lock for exclusive access */
 235 ) {
 236     return RtlLockHeap( heap );
 237 }
 238
 239
 240 /***********************************************************************
 241  *           HeapUnlock   (KERNEL32.@)
 242  * Releases ownership of the critical section object.
 243  *
 244  * RETURNS
 245  *      TRUE: Success
 246  *      FALSE: Failure
 247  */
 248 BOOL WINAPI HeapUnlock(
 249               HANDLE heap /* [in] Handle to the heap to unlock */
 250 ) {
 251     return RtlUnlockHeap( heap );
 252 }
 253
 254
 255 /***********************************************************************
 256  *           GetProcessHeaps    (KERNEL32.@)
 257  */
 258 DWORD WINAPI GetProcessHeaps( DWORD count, HANDLE *heaps )
 259 {
 260     return RtlGetProcessHeaps( count, heaps );
 261 }
 262
 263
 264 /* These are needed so that we can call the functions from inside kernel itself */
 265
 266 /***********************************************************************
 267  *           HeapAlloc    (KERNEL32.@)
 268  */
 269 LPVOID WINAPI HeapAlloc( HANDLE heap, DWORD flags, SIZE_T size )
 270 {
 271     return RtlAllocateHeap( heap, flags, size );
 272 }
 273
 274 BOOL WINAPI HeapFree( HANDLE heap, DWORD flags, LPVOID ptr )
 275 {
 276     return RtlFreeHeap( heap, flags, ptr );
 277 }
 278
 279 LPVOID WINAPI HeapReAlloc( HANDLE heap, DWORD flags, LPVOID ptr, SIZE_T size )
 280 {
 281     return RtlReAllocateHeap( heap, flags, ptr, size );
 282 }
 283
 284 SIZE_T WINAPI HeapSize( HANDLE heap, DWORD flags, LPCVOID ptr )
 285 {
 286     return RtlSizeHeap( heap, flags, ptr );
 287 }
 288
 289 BOOL WINAPI HeapQueryInformation( HANDLE heap, HEAP_INFORMATION_CLASS info_class,
 290                                   PVOID info, SIZE_T size_in, PSIZE_T size_out)
 291 {
 292     NTSTATUS ret = RtlQueryHeapInformation( heap, info_class, info, size_in, size_out );
 293     if (ret) SetLastError( RtlNtStatusToDosError(ret) );
 294     return !ret;
 295 }
 296
 297 BOOL WINAPI HeapSetInformation( HANDLE heap, HEAP_INFORMATION_CLASS infoclass, PVOID info, SIZE_T size)
 298 {
 299     NTSTATUS ret = RtlSetHeapInformation( heap, infoclass, info, size );
 300     if (ret) SetLastError( RtlNtStatusToDosError(ret) );
 301     return !ret;
 302 }
 303
 304 /*
 305  * Win32 Global heap functions (GlobalXXX).
 306  * These functions included in Win32 for compatibility with 16 bit Windows
 307  * Especially the moveable blocks and handles are oldish.
 308  * But the ability to directly allocate memory with GPTR and LPTR is widely
 309  * used.
 310  *
 311  * The handle stuff looks horrible, but it's implemented almost like Win95
 312  * does it.
 313  *
 314  */
 315
 316 #define MAGIC_GLOBAL_USED 0x5342
 317 #define HANDLE_TO_INTERN(h)  ((PGLOBAL32_INTERN)(((char *)(h))-2))
 318 #define INTERN_TO_HANDLE(i)  (&((i)->Pointer))
 319 #define POINTER_TO_HANDLE(p) (*(((const HGLOBAL *)(p))-2))
 320 #define ISHANDLE(h)          (((ULONG_PTR)(h)&2)!=0)
 321 #define ISPOINTER(h)         (((ULONG_PTR)(h)&2)==0)
 322 /* align the storage needed for the HGLOBAL on an 8byte boundary thus
 323  * GlobalAlloc/GlobalReAlloc'ing with GMEM_MOVEABLE of memory with
 324  * size = 8*k, where k=1,2,3,... alloc's exactly the given size.
 325  * The Minolta DiMAGE Image Viewer heavily relies on this, corrupting
 326  * the output jpeg's > 1 MB if not */
 327 #define HGLOBAL_STORAGE      (sizeof(HGLOBAL)*2)
 328
 329 #include "pshpack1.h"
 330
 331 typedef struct __GLOBAL32_INTERN
 332 {
 333    WORD         Magic;
 334    LPVOID       Pointer;
 335    BYTE         Flags;
 336    BYTE         LockCount;
 337 } GLOBAL32_INTERN, *PGLOBAL32_INTERN;
 338
 339 #include "poppack.h"
 340
 341 /***********************************************************************
 342  *           GlobalAlloc   (KERNEL32.@)
 343  *
 344  * Allocate a global memory object.
 345  *
 346  * RETURNS
 347  *      Handle: Success
 348  *      NULL: Failure
 349  */
 350 HGLOBAL WINAPI GlobalAlloc(
 351                  UINT flags, /* [in] Object allocation attributes */
 352                  SIZE_T size /* [in] Number of bytes to allocate */
 353 ) {
 354    PGLOBAL32_INTERN     pintern;
 355    DWORD                hpflags;
 356    LPVOID               palloc;
 357
 358    if(flags&GMEM_ZEROINIT)
 359       hpflags=HEAP_ZERO_MEMORY;
 360    else
 361       hpflags=0;
 362
 363    if((flags & GMEM_MOVEABLE)==0) /* POINTER */
 364    {
 365       palloc=HeapAlloc(GetProcessHeap(), hpflags, size);
 366       TRACE( "(flags=%04x) returning %p\n",  flags, palloc );
 367       return palloc;
 368    }
 369    else  /* HANDLE */
 370    {
 371       if (size > INT_MAX-HGLOBAL_STORAGE)
 372       {
 373           SetLastError(ERROR_OUTOFMEMORY);
 374           return 0;
 375       }
 376
 377       pintern = HeapAlloc(GetProcessHeap(), 0, sizeof(GLOBAL32_INTERN));
 378       if (pintern)
 379       {
 380           /* Mask out obsolete flags */
 381           flags &= ~(GMEM_LOWER | GMEM_NOCOMPACT | GMEM_NOT_BANKED | GMEM_NOTIFY);
 382
 383           pintern->Magic = MAGIC_GLOBAL_USED;
 384           pintern->Flags = flags >> 8;
 385           pintern->LockCount = 0;
 386
 387           if (size)
 388           {
 389               palloc = HeapAlloc(GetProcessHeap(), hpflags, size+HGLOBAL_STORAGE);
 390               if (!palloc)
 391               {
 392                   HeapFree(GetProcessHeap(), 0, pintern);
 393                   pintern = NULL;
 394               }
 395               else
 396               {
 397                   *(HGLOBAL *)palloc = INTERN_TO_HANDLE(pintern);
 398                   pintern->Pointer = (char *)palloc + HGLOBAL_STORAGE;
 399               }
 400           }
 401           else
 402               pintern->Pointer = NULL;
 403       }
 404
 405       if (!pintern) return 0;
 406       TRACE( "(flags=%04x) returning handle %p pointer %p\n",
 407              flags, INTERN_TO_HANDLE(pintern), pintern->Pointer );
 408       return INTERN_TO_HANDLE(pintern);
 409    }
 410 }
 411
 412
 413 /***********************************************************************
 414  *           GlobalLock   (KERNEL32.@)
 415  *
 416  * Lock a global memory object and return a pointer to first byte of the memory
 417  *
 418  * PARAMS
 419  *  hmem [I] Handle of the global memory object
 420  *
 421  * RETURNS
 422  *  Success: Pointer to first byte of the memory block
 423  *  Failure: NULL
 424  *
 425  * NOTES
 426  *   When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
 427  *
 428  */
 429 LPVOID WINAPI GlobalLock(HGLOBAL hmem)
 430 {
 431     PGLOBAL32_INTERN pintern;
 432     LPVOID           palloc;
 433
 434     if (ISPOINTER(hmem))
 435         return IsBadReadPtr(hmem, 1) ? NULL : hmem;
 436
 437     RtlLockHeap(GetProcessHeap());
 438     __TRY
 439     {
 440         pintern = HANDLE_TO_INTERN(hmem);
 441         if (pintern->Magic == MAGIC_GLOBAL_USED)
 442         {
 443             palloc = pintern->Pointer;
 444             if (!pintern->Pointer)
 445                 SetLastError(ERROR_DISCARDED);
 446             else if (pintern->LockCount < GMEM_LOCKCOUNT)
 447                 pintern->LockCount++;
 448         }
 449         else
 450         {
 451             WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 452             palloc = NULL;
 453             SetLastError(ERROR_INVALID_HANDLE);
 454         }
 455     }
 456     __EXCEPT_PAGE_FAULT
 457     {
 458         WARN("(%p): Page fault occurred ! Caused by bug ?\n", hmem);
 459         palloc = NULL;
 460         SetLastError(ERROR_INVALID_HANDLE);
 461     }
 462     __ENDTRY
 463     RtlUnlockHeap(GetProcessHeap());
 464     return palloc;
 465 }
 466
 467
 468 /***********************************************************************
 469  *           GlobalUnlock   (KERNEL32.@)
 470  *
 471  * Unlock a global memory object.
 472  *
 473  * PARAMS
 474  *  hmem [I] Handle of the global memory object
 475  *
 476  * RETURNS
 477  *  Success: Object is still locked
 478  *  Failure: FALSE (The Object is unlocked)
 479  *
 480  * NOTES
 481  *   When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
 482  *
 483  */
 484 BOOL WINAPI GlobalUnlock(HGLOBAL hmem)
 485 {
 486     PGLOBAL32_INTERN pintern;
 487     BOOL locked;
 488
 489     if (ISPOINTER(hmem)) return TRUE;
 490
 491     RtlLockHeap(GetProcessHeap());
 492     __TRY
 493     {
 494         pintern=HANDLE_TO_INTERN(hmem);
 495         if(pintern->Magic==MAGIC_GLOBAL_USED)
 496         {
 497             if(pintern->LockCount)
 498             {
 499                 pintern->LockCount--;
 500                 locked = (pintern->LockCount != 0);
 501                 if (!locked) SetLastError(NO_ERROR);
 502             }
 503             else
 504             {
 505                 WARN("%p not locked\n", hmem);
 506                 SetLastError(ERROR_NOT_LOCKED);
 507                 locked = FALSE;
 508             }
 509         }
 510         else
 511         {
 512             WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 513             SetLastError(ERROR_INVALID_HANDLE);
 514             locked=FALSE;
 515         }
 516     }
 517     __EXCEPT_PAGE_FAULT
 518     {
 519         WARN("(%p): Page fault occurred ! Caused by bug ?\n", hmem);
 520         SetLastError( ERROR_INVALID_PARAMETER );
 521         locked=FALSE;
 522     }
 523     __ENDTRY
 524     RtlUnlockHeap(GetProcessHeap());
 525     return locked;
 526 }
 527
 528
 529 /***********************************************************************
 530  *           GlobalHandle   (KERNEL32.@)
 531  *
 532  * Get the handle associated with the pointer to a global memory block.
 533  *
 534  * RETURNS
 535  *      Handle: Success
 536  *      NULL: Failure
 537  */
 538 HGLOBAL WINAPI GlobalHandle(
 539                  LPCVOID pmem /* [in] Pointer to global memory block */
 540 ) {
 541     HGLOBAL handle;
 542     PGLOBAL32_INTERN  maybe_intern;
 543     LPCVOID test;
 544
 545     if (!pmem)
 546     {
 547         SetLastError( ERROR_INVALID_PARAMETER );
 548         return 0;
 549     }
 550
 551     RtlLockHeap(GetProcessHeap());
 552     __TRY
 553     {
 554         handle = 0;
 555
 556         /* note that if pmem is a pointer to a block allocated by        */
 557         /* GlobalAlloc with GMEM_MOVEABLE then magic test in HeapValidate  */
 558         /* will fail.                                                      */
 559         if (ISPOINTER(pmem)) {
 560             if (HeapValidate( GetProcessHeap(), 0, pmem )) {
 561                 handle = (HGLOBAL)pmem;  /* valid fixed block */
 562                 break;
 563             }
 564             handle = POINTER_TO_HANDLE(pmem);
 565         } else
 566             handle = (HGLOBAL)pmem;
 567
 568         /* Now test handle either passed in or retrieved from pointer */
 569         maybe_intern = HANDLE_TO_INTERN( handle );
 570         if (maybe_intern->Magic == MAGIC_GLOBAL_USED) {
 571             test = maybe_intern->Pointer;
 572             if (HeapValidate( GetProcessHeap(), 0, (const char *)test - HGLOBAL_STORAGE ) && /* obj(-handle) valid arena? */
 573                 HeapValidate( GetProcessHeap(), 0, maybe_intern ))  /* intern valid arena? */
 574                 break;  /* valid moveable block */
 575         }
 576         handle = 0;
 577         SetLastError( ERROR_INVALID_HANDLE );
 578     }
 579     __EXCEPT_PAGE_FAULT
 580     {
 581         SetLastError( ERROR_INVALID_HANDLE );
 582         handle = 0;
 583     }
 584     __ENDTRY
 585     RtlUnlockHeap(GetProcessHeap());
 586
 587     return handle;
 588 }
 589
 590
 591 /***********************************************************************
 592  *           GlobalReAlloc   (KERNEL32.@)
 593  *
 594  * Change the size or attributes of a global memory object.
 595  *
 596  * RETURNS
 597  *      Handle: Success
 598  *      NULL: Failure
 599  */
 600 HGLOBAL WINAPI GlobalReAlloc(
 601                  HGLOBAL hmem, /* [in] Handle of global memory object */
 602                  SIZE_T size,  /* [in] New size of block */
 603                  UINT flags    /* [in] How to reallocate object */
 604 ) {
 605    LPVOID               palloc;
 606    HGLOBAL            hnew;
 607    PGLOBAL32_INTERN     pintern;
 608    DWORD heap_flags = (flags & GMEM_ZEROINIT) ? HEAP_ZERO_MEMORY : 0;
 609
 610    hnew = 0;
 611    RtlLockHeap(GetProcessHeap());
 612    if(flags & GMEM_MODIFY) /* modify flags */
 613    {
 614       if( ISPOINTER(hmem) && (flags & GMEM_MOVEABLE))
 615       {
 616          /* make a fixed block moveable
 617           * actually only NT is able to do this. But it's soo simple
 618           */
 619          if (hmem == 0)
 620          {
 621              WARN("GlobalReAlloc with null handle!\n");
 622              SetLastError( ERROR_NOACCESS );
 623              hnew = 0;
 624          }
 625          else
 626          {
 627              size = HeapSize(GetProcessHeap(), 0, hmem);
 628              hnew = GlobalAlloc(flags, size);
 629              palloc = GlobalLock(hnew);
 630              memcpy(palloc, hmem, size);
 631              GlobalUnlock(hnew);
 632              GlobalFree(hmem);
 633          }
 634       }
 635       else if( ISPOINTER(hmem) &&(flags & GMEM_DISCARDABLE))
 636       {
 637          /* change the flags to make our block "discardable" */
 638          pintern=HANDLE_TO_INTERN(hmem);
 639          pintern->Flags = pintern->Flags | (GMEM_DISCARDABLE >> 8);
 640          hnew=hmem;
 641       }
 642       else
 643       {
 644          SetLastError(ERROR_INVALID_PARAMETER);
 645          hnew = 0;
 646       }
 647    }
 648    else
 649    {
 650       if(ISPOINTER(hmem))
 651       {
 652          /* reallocate fixed memory */
 653          if (!(flags & GMEM_MOVEABLE))
 654             heap_flags |= HEAP_REALLOC_IN_PLACE_ONLY;
 655          hnew=HeapReAlloc(GetProcessHeap(), heap_flags, hmem, size);
 656       }
 657       else
 658       {
 659          /* reallocate a moveable block */
 660          pintern=HANDLE_TO_INTERN(hmem);
 661
 662 #if 0
 663 /* Apparently Windows doesn't care whether the handle is locked at this point */
 664 /* See also the same comment in GlobalFree() */
 665          if(pintern->LockCount>1) {
 666             ERR("handle 0x%08lx is still locked, cannot realloc!\n",(DWORD)hmem);
 667             SetLastError(ERROR_INVALID_HANDLE);
 668          } else
 669 #endif
 670          if(size!=0)
 671          {
 672             hnew=hmem;
 673             if(pintern->Pointer)
 674             {
 675                if(size > INT_MAX-HGLOBAL_STORAGE)
 676                {
 677                    SetLastError(ERROR_OUTOFMEMORY);
 678                    hnew = 0;
 679                }
 680                else if((palloc = HeapReAlloc(GetProcessHeap(), heap_flags,
 681                                    (char *) pintern->Pointer-HGLOBAL_STORAGE,
 682                                    size+HGLOBAL_STORAGE)) == NULL)
 683                    hnew = 0; /* Block still valid */
 684                else
 685                    pintern->Pointer = (char *)palloc+HGLOBAL_STORAGE;
 686             }
 687             else
 688             {
 689                 if(size > INT_MAX-HGLOBAL_STORAGE)
 690                 {
 691                     SetLastError(ERROR_OUTOFMEMORY);
 692                     hnew = 0;
 693                 }
 694                 else if((palloc=HeapAlloc(GetProcessHeap(), heap_flags, size+HGLOBAL_STORAGE))
 695                    == NULL)
 696                     hnew = 0;
 697                 else
 698                 {
 699                     *(HGLOBAL *)palloc = hmem;
 700                     pintern->Pointer = (char *)palloc + HGLOBAL_STORAGE;
 701                 }
 702             }
 703          }
 704          else
 705          {
 706             if (pintern->LockCount == 0)
 707             {
 708                 if(pintern->Pointer)
 709                 {
 710                     HeapFree(GetProcessHeap(), 0, (char *) pintern->Pointer-HGLOBAL_STORAGE);
 711                     pintern->Pointer = NULL;
 712                 }
 713                 hnew = hmem;
 714             }
 715             else
 716                 WARN("not freeing memory associated with locked handle\n");
 717          }
 718       }
 719    }
 720    RtlUnlockHeap(GetProcessHeap());
 721    return hnew;
 722 }
 723
 724
 725 /***********************************************************************
 726  *           GlobalFree   (KERNEL32.@)
 727  *
 728  * Free a global memory object.
 729  *
 730  * PARAMS
 731  *  hmem [I] Handle of the global memory object
 732  *
 733  * RETURNS
 734  *  Success: NULL
 735  *  Failure: The provided handle
 736  *
 737  * NOTES
 738  *   When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
 739  *
 740  */
 741 HGLOBAL WINAPI GlobalFree(HGLOBAL hmem)
 742 {
 743     PGLOBAL32_INTERN pintern;
 744     HGLOBAL hreturned;
 745
 746     RtlLockHeap(GetProcessHeap());
 747     __TRY
 748     {
 749         hreturned = 0;
 750         if(ISPOINTER(hmem)) /* POINTER */
 751         {
 752             if(!HeapFree(GetProcessHeap(), 0, hmem))
 753             {
 754                 SetLastError(ERROR_INVALID_HANDLE);
 755                 hreturned = hmem;
 756             }
 757         }
 758         else  /* HANDLE */
 759         {
 760             pintern=HANDLE_TO_INTERN(hmem);
 761
 762             if(pintern->Magic==MAGIC_GLOBAL_USED)
 763             {
 764                 pintern->Magic = 0xdead;
 765
 766                 /* WIN98 does not make this test. That is you can free a */
 767                 /* block you have not unlocked. Go figure!!              */
 768                 /* if(pintern->LockCount!=0)  */
 769                 /*    SetLastError(ERROR_INVALID_HANDLE);  */
 770
 771                 if(pintern->Pointer)
 772                     if(!HeapFree(GetProcessHeap(), 0, (char *)(pintern->Pointer)-HGLOBAL_STORAGE))
 773                         hreturned=hmem;
 774                 if(!HeapFree(GetProcessHeap(), 0, pintern))
 775                     hreturned=hmem;
 776             }
 777             else
 778             {
 779                 WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 780                 SetLastError(ERROR_INVALID_HANDLE);
 781                 hreturned = hmem;
 782             }
 783         }
 784     }
 785     __EXCEPT_PAGE_FAULT
 786     {
 787         ERR("(%p): Page fault occurred ! Caused by bug ?\n", hmem);
 788         SetLastError( ERROR_INVALID_PARAMETER );
 789         hreturned = hmem;
 790     }
 791     __ENDTRY
 792     RtlUnlockHeap(GetProcessHeap());
 793     return hreturned;
 794 }
 795
 796
 797 /***********************************************************************
 798  *           GlobalSize   (KERNEL32.@)
 799  *
 800  * Get the size of a global memory object.
 801  *
 802  * PARAMS
 803  *  hmem [I] Handle of the global memory object
 804  *
 805  * RETURNS
 806  *  Failure: 0
 807  *  Success: Size in Bytes of the global memory object
 808  *
 809  * NOTES
 810  *   When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
 811  *
 812  */
 813 SIZE_T WINAPI GlobalSize(HGLOBAL hmem)
 814 {
 815    SIZE_T               retval;
 816    PGLOBAL32_INTERN     pintern;
 817
 818    if (!((ULONG_PTR)hmem >> 16))
 819    {
 820        SetLastError(ERROR_INVALID_HANDLE);
 821        return 0;
 822    }
 823
 824    if(ISPOINTER(hmem))
 825    {
 826       retval=HeapSize(GetProcessHeap(), 0, hmem);
 827
 828       if (retval == ~0ul) /* It might be a GMEM_MOVEABLE data pointer */
 829       {
 830           retval = HeapSize(GetProcessHeap(), 0, (char*)hmem - HGLOBAL_STORAGE);
 831           if (retval != ~0ul) retval -= HGLOBAL_STORAGE;
 832       }
 833    }
 834    else
 835    {
 836       RtlLockHeap(GetProcessHeap());
 837       pintern=HANDLE_TO_INTERN(hmem);
 838
 839       if(pintern->Magic==MAGIC_GLOBAL_USED)
 840       {
 841          if (!pintern->Pointer) /* handle case of GlobalAlloc( ??,0) */
 842              retval = 0;
 843          else
 844          {
 845              retval = HeapSize(GetProcessHeap(), 0, (char *)pintern->Pointer - HGLOBAL_STORAGE );
 846              if (retval != ~0ul) retval -= HGLOBAL_STORAGE;
 847          }
 848       }
 849       else
 850       {
 851          WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 852          SetLastError(ERROR_INVALID_HANDLE);
 853          retval=0;
 854       }
 855       RtlUnlockHeap(GetProcessHeap());
 856    }
 857    if (retval == ~0ul) retval = 0;
 858    return retval;
 859 }
 860
 861
 862 /***********************************************************************
 863  *           GlobalWire   (KERNEL32.@)
 864  */
 865 LPVOID WINAPI GlobalWire(HGLOBAL hmem)
 866 {
 867    return GlobalLock( hmem );
 868 }
 869
 870
 871 /***********************************************************************
 872  *           GlobalUnWire   (KERNEL32.@)
 873  */
 874 BOOL WINAPI GlobalUnWire(HGLOBAL hmem)
 875 {
 876    return GlobalUnlock( hmem);
 877 }
 878
 879
 880 /***********************************************************************
 881  *           GlobalFix   (KERNEL32.@)
 882  */
 883 VOID WINAPI GlobalFix(HGLOBAL hmem)
 884 {
 885     GlobalLock( hmem );
 886 }
 887
 888
 889 /***********************************************************************
 890  *           GlobalUnfix   (KERNEL32.@)
 891  */
 892 VOID WINAPI GlobalUnfix(HGLOBAL hmem)
 893 {
 894    GlobalUnlock( hmem);
 895 }
 896
 897
 898 /***********************************************************************
 899  *           GlobalFlags   (KERNEL32.@)
 900  *
 901  * Get information about a global memory object.
 902  *
 903  * PARAMS
 904  *  hmem [I] Handle of the global memory object
 905  *
 906  * RETURNS
 907  *  Failure: GMEM_INVALID_HANDLE, when the provided handle is invalid
 908  *  Success: Value specifying allocation flags and lock count
 909  *
 910  */
 911 UINT WINAPI GlobalFlags(HGLOBAL hmem)
 912 {
 913    DWORD                retval;
 914    PGLOBAL32_INTERN     pintern;
 915
 916    if(ISPOINTER(hmem))
 917    {
 918       retval=0;
 919    }
 920    else
 921    {
 922       RtlLockHeap(GetProcessHeap());
 923       pintern=HANDLE_TO_INTERN(hmem);
 924       if(pintern->Magic==MAGIC_GLOBAL_USED)
 925       {
 926          retval=pintern->LockCount + (pintern->Flags<<8);
 927          if(pintern->Pointer==0)
 928             retval|= GMEM_DISCARDED;
 929       }
 930       else
 931       {
 932          WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
 933          SetLastError(ERROR_INVALID_HANDLE);
 934          retval = GMEM_INVALID_HANDLE;
 935       }
 936       RtlUnlockHeap(GetProcessHeap());
 937    }
 938    return retval;
 939 }
 940
 941
 942 /***********************************************************************
 943  *           GlobalCompact   (KERNEL32.@)
 944  */
 945 SIZE_T WINAPI GlobalCompact( DWORD minfree )
 946 {
 947     return 0;  /* GlobalCompact does nothing in Win32 */
 948 }
 949
 950
 951 /***********************************************************************
 952  *           LocalAlloc   (KERNEL32.@)
 953  *
 954  * Allocate a local memory object.
 955  *
 956  * RETURNS
 957  *      Handle: Success
 958  *      NULL: Failure
 959  *
 960  * NOTES
 961  *  Windows memory management does not provide a separate local heap
 962  *  and global heap.
 963  */
 964 HLOCAL WINAPI LocalAlloc(
 965                 UINT flags, /* [in] Allocation attributes */
 966                 SIZE_T size /* [in] Number of bytes to allocate */
 967 ) {
 968     return GlobalAlloc( flags, size );
 969 }
 970
 971
 972 /***********************************************************************
 973  *           LocalCompact   (KERNEL32.@)
 974  */
 975 SIZE_T WINAPI LocalCompact( UINT minfree )
 976 {
 977     return 0;  /* LocalCompact does nothing in Win32 */
 978 }
 979
 980
 981 /***********************************************************************
 982  *           LocalFlags   (KERNEL32.@)
 983  *
 984  * Get information about a local memory object.
 985  *
 986  * RETURNS
 987  *      Value specifying allocation flags and lock count.
 988  *      LMEM_INVALID_HANDLE: Failure
 989  *
 990  * NOTES
 991  *  Windows memory management does not provide a separate local heap
 992  *  and global heap.
 993  */
 994 UINT WINAPI LocalFlags(
 995               HLOCAL handle /* [in] Handle of memory object */
 996 ) {
 997     return GlobalFlags( handle );
 998 }
 999
1000
1001 /***********************************************************************
1002  *           LocalFree   (KERNEL32.@)
1003  *
1004  * Free a local memory object.
1005  *
1006  * RETURNS
1007  *      NULL: Success
1008  *      Handle: Failure
1009  *
1010  * NOTES
1011  *  Windows memory management does not provide a separate local heap
1012  *  and global heap.
1013  */
1014 HLOCAL WINAPI LocalFree(
1015                 HLOCAL handle /* [in] Handle of memory object */
1016 ) {
1017     return GlobalFree( handle );
1018 }
1019
1020
1021 /***********************************************************************
1022  *           LocalHandle   (KERNEL32.@)
1023  *
1024  * Get the handle associated with the pointer to a local memory block.
1025  *
1026  * RETURNS
1027  *      Handle: Success
1028  *      NULL: Failure
1029  *
1030  * NOTES
1031  *  Windows memory management does not provide a separate local heap
1032  *  and global heap.
1033  */
1034 HLOCAL WINAPI LocalHandle(
1035                 LPCVOID ptr /* [in] Address of local memory block */
1036 ) {
1037     return GlobalHandle( ptr );
1038 }
1039
1040
1041 /***********************************************************************
1042  *           LocalLock   (KERNEL32.@)
1043  * Locks a local memory object and returns pointer to the first byte
1044  * of the memory block.
1045  *
1046  * RETURNS
1047  *      Pointer: Success
1048  *      NULL: Failure
1049  *
1050  * NOTES
1051  *  Windows memory management does not provide a separate local heap
1052  *  and global heap.
1053  */
1054 LPVOID WINAPI LocalLock(
1055               HLOCAL handle /* [in] Address of local memory object */
1056 ) {
1057     return GlobalLock( handle );
1058 }
1059
1060
1061 /***********************************************************************
1062  *           LocalReAlloc   (KERNEL32.@)
1063  *
1064  * Change the size or attributes of a local memory object.
1065  *
1066  * RETURNS
1067  *      Handle: Success
1068  *      NULL: Failure
1069  *
1070  * NOTES
1071  *  Windows memory management does not provide a separate local heap
1072  *  and global heap.
1073  */
1074 HLOCAL WINAPI LocalReAlloc(
1075                 HLOCAL handle, /* [in] Handle of memory object */
1076                 SIZE_T size,   /* [in] New size of block */
1077                 UINT flags     /* [in] How to reallocate object */
1078 ) {
1079     return GlobalReAlloc( handle, size, flags );
1080 }
1081
1082
1083 /***********************************************************************
1084  *           LocalShrink   (KERNEL32.@)
1085  */
1086 SIZE_T WINAPI LocalShrink( HGLOBAL handle, UINT newsize )
1087 {
1088     return 0;  /* LocalShrink does nothing in Win32 */
1089 }
1090
1091
1092 /***********************************************************************
1093  *           LocalSize   (KERNEL32.@)
1094  *
1095  * Get the size of a local memory object.
1096  *
1097  * RETURNS
1098  *      Size: Success
1099  *      0: Failure
1100  *
1101  * NOTES
1102  *  Windows memory management does not provide a separate local heap
1103  *  and global heap.
1104  */
1105 SIZE_T WINAPI LocalSize(
1106               HLOCAL handle /* [in] Handle of memory object */
1107 ) {
1108     return GlobalSize( handle );
1109 }
1110
1111
1112 /***********************************************************************
1113  *           LocalUnlock   (KERNEL32.@)
1114  *
1115  * Unlock a local memory object.
1116  *
1117  * RETURNS
1118  *      TRUE: Object is still locked
1119  *      FALSE: Object is unlocked
1120  *
1121  * NOTES
1122  *  Windows memory management does not provide a separate local heap
1123  *  and global heap.
1124  */
1125 BOOL WINAPI LocalUnlock(
1126               HLOCAL handle /* [in] Handle of memory object */
1127 )
1128 {
1129     if (ISPOINTER( handle ))
1130     {
1131         SetLastError( ERROR_NOT_LOCKED );
1132         return FALSE;
1133     }
1134
1135     return GlobalUnlock( handle );
1136 }
1137
1138
1139 /***********************************************************************
1140  *           GlobalMemoryStatusEx   (KERNEL32.@)
1141  * A version of GlobalMemoryStatus that can deal with memory over 4GB
1142  *
1143  * RETURNS
1144  *      TRUE
1145  */
1146 BOOL WINAPI GlobalMemoryStatusEx( LPMEMORYSTATUSEX lpmemex )
1147 {
1148     static MEMORYSTATUSEX       cached_memstatus;
1149     static int cache_lastchecked = 0;
1150     SYSTEM_INFO si;
1151 #ifdef linux
1152     FILE *f;
1153 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
1154     DWORDLONG total;
1155 #ifdef __APPLE__
1156     unsigned int val;
1157 #else
1158     unsigned long val;
1159 #endif
1160     int mib[2];
1161     size_t size_sys;
1162 #ifdef HW_MEMSIZE
1163     uint64_t val64;
1164 #endif
1165 #ifdef VM_SWAPUSAGE
1166     struct xsw_usage swap;
1167 #endif
1168 #elif defined(sun)
1169     unsigned long pagesize,maxpages,freepages,swapspace,swapfree;
1170     struct anoninfo swapinf;
1171     int rval;
1172 #endif
1173
1174     if (lpmemex->dwLength != sizeof(*lpmemex))
1175     {
1176         SetLastError( ERROR_INVALID_PARAMETER );
1177         return FALSE;
1178     }
1179
1180     if (time(NULL)==cache_lastchecked) {
1181         *lpmemex = cached_memstatus;
1182         return TRUE;
1183     }
1184     cache_lastchecked = time(NULL);
1185
1186     lpmemex->dwMemoryLoad     = 0;
1187     lpmemex->ullTotalPhys     = 16*1024*1024;
1188     lpmemex->ullAvailPhys     = 16*1024*1024;
1189     lpmemex->ullTotalPageFile = 16*1024*1024;
1190     lpmemex->ullAvailPageFile = 16*1024*1024;
1191
1192 #ifdef linux
1193     f = fopen( "/proc/meminfo", "r" );
1194     if (f)
1195     {
1196         char buffer[256];
1197         unsigned long total, used, free, shared, buffers, cached;
1198
1199         lpmemex->ullTotalPhys = lpmemex->ullAvailPhys = 0;
1200         lpmemex->ullTotalPageFile = lpmemex->ullAvailPageFile = 0;
1201         while (fgets( buffer, sizeof(buffer), f ))
1202         {
1203             /* old style /proc/meminfo ... */
1204             if (sscanf( buffer, "Mem: %lu %lu %lu %lu %lu %lu",
1205                         &total, &used, &free, &shared, &buffers, &cached ))
1206             {
1207                 lpmemex->ullTotalPhys += total;
1208                 lpmemex->ullAvailPhys += free + buffers + cached;
1209             }
1210             if (sscanf( buffer, "Swap: %lu %lu %lu", &total, &used, &free ))
1211             {
1212                 lpmemex->ullTotalPageFile += total;
1213                 lpmemex->ullAvailPageFile += free;
1214             }
1215
1216             /* new style /proc/meminfo ... */
1217             if (sscanf(buffer, "MemTotal: %lu", &total))
1218                 lpmemex->ullTotalPhys = (ULONG64)total*1024;
1219             if (sscanf(buffer, "MemFree: %lu", &free))
1220                 lpmemex->ullAvailPhys = (ULONG64)free*1024;
1221             if (sscanf(buffer, "SwapTotal: %lu", &total))
1222                 lpmemex->ullTotalPageFile = (ULONG64)total*1024;
1223             if (sscanf(buffer, "SwapFree: %lu", &free))
1224                 lpmemex->ullAvailPageFile = (ULONG64)free*1024;
1225             if (sscanf(buffer, "Buffers: %lu", &buffers))
1226                 lpmemex->ullAvailPhys += (ULONG64)buffers*1024;
1227             if (sscanf(buffer, "Cached: %lu", &cached))
1228                 lpmemex->ullAvailPhys += (ULONG64)cached*1024;
1229         }
1230         fclose( f );
1231     }
1232 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
1233     total = 0;
1234     lpmemex->ullAvailPhys = 0;
1235
1236     mib[0] = CTL_HW;
1237 #ifdef HW_MEMSIZE
1238     mib[1] = HW_MEMSIZE;
1239     size_sys = sizeof(val64);
1240     if (!sysctl(mib, 2, &val64, &size_sys, NULL, 0) && size_sys == sizeof(val64) && val64)
1241         total = val64;
1242 #endif
1243
1244 #ifdef HAVE_MACH_MACH_H
1245     {
1246         host_name_port_t host = mach_host_self();
1247         mach_msg_type_number_t count;
1248
1249 #ifdef HOST_VM_INFO64_COUNT
1250         vm_size_t page_size;
1251         vm_statistics64_data_t vm_stat;
1252
1253         count = HOST_VM_INFO64_COUNT;
1254         if (host_statistics64(host, HOST_VM_INFO64, (host_info64_t)&vm_stat, &count) == KERN_SUCCESS &&
1255             host_page_size(host, &page_size) == KERN_SUCCESS)
1256             lpmemex->ullAvailPhys = (vm_stat.free_count + vm_stat.inactive_count) * (DWORDLONG)page_size;
1257 #endif
1258         if (!total)
1259         {
1260             host_basic_info_data_t info;
1261             count = HOST_BASIC_INFO_COUNT;
1262             if (host_info(host, HOST_BASIC_INFO, (host_info_t)&info, &count) == KERN_SUCCESS)
1263                 total = info.max_mem;
1264         }
1265
1266         mach_port_deallocate(mach_task_self(), host);
1267     }
1268 #endif
1269
1270     if (!total)
1271     {
1272         mib[1] = HW_PHYSMEM;
1273         size_sys = sizeof(val);
1274         if (!sysctl(mib, 2, &val, &size_sys, NULL, 0) && size_sys == sizeof(val) && val)
1275             total = val;
1276     }
1277
1278     if (total)
1279         lpmemex->ullTotalPhys = total;
1280
1281     if (!lpmemex->ullAvailPhys)
1282     {
1283         mib[1] = HW_USERMEM;
1284         size_sys = sizeof(val);
1285         if (!sysctl(mib, 2, &val, &size_sys, NULL, 0) && size_sys == sizeof(val) && val)
1286             lpmemex->ullAvailPhys = val;
1287     }
1288
1289     if (!lpmemex->ullAvailPhys)
1290         lpmemex->ullAvailPhys = lpmemex->ullTotalPhys;
1291
1292     lpmemex->ullTotalPageFile = lpmemex->ullAvailPhys;
1293     lpmemex->ullAvailPageFile = lpmemex->ullAvailPhys;
1294
1295 #ifdef VM_SWAPUSAGE
1296     mib[0] = CTL_VM;
1297     mib[1] = VM_SWAPUSAGE;
1298     size_sys = sizeof(swap);
1299     if (!sysctl(mib, 2, &swap, &size_sys, NULL, 0) && size_sys == sizeof(swap))
1300     {
1301         lpmemex->ullTotalPageFile = swap.xsu_total;
1302         lpmemex->ullAvailPageFile = swap.xsu_avail;
1303     }
1304 #endif
1305 #elif defined ( sun )
1306     pagesize=sysconf(_SC_PAGESIZE);
1307     maxpages=sysconf(_SC_PHYS_PAGES);
1308     freepages=sysconf(_SC_AVPHYS_PAGES);
1309     rval=swapctl(SC_AINFO, &swapinf);
1310     if(rval >-1)
1311     {
1312         swapspace=swapinf.ani_max*pagesize;
1313         swapfree=swapinf.ani_free*pagesize;
1314     }else
1315     {
1316
1317         WARN("Swap size cannot be determined , assuming equal to physical memory\n");
1318         swapspace=maxpages*pagesize;
1319         swapfree=maxpages*pagesize;
1320     }
1321     lpmemex->ullTotalPhys=pagesize*maxpages;
1322     lpmemex->ullAvailPhys = pagesize*freepages;
1323     lpmemex->ullTotalPageFile = swapspace;
1324     lpmemex->ullAvailPageFile = swapfree;
1325 #endif
1326
1327     if (lpmemex->ullTotalPhys)
1328     {
1329         lpmemex->dwMemoryLoad = (lpmemex->ullTotalPhys-lpmemex->ullAvailPhys)
1330                                   / (lpmemex->ullTotalPhys / 100);
1331     }
1332
1333     /* Win98 returns only the swapsize in ullTotalPageFile/ullAvailPageFile,
1334        WinXP returns the size of physical memory + swapsize;
1335        mimic the behavior of XP.
1336        Note: Project2k refuses to start if it sees less than 1Mb of free swap.
1337     */
1338     lpmemex->ullTotalPageFile += lpmemex->ullTotalPhys;
1339     lpmemex->ullAvailPageFile += lpmemex->ullAvailPhys;
1340
1341     /* Titan Quest refuses to run if TotalPageFile <= ullTotalPhys */
1342     if(lpmemex->ullTotalPageFile == lpmemex->ullTotalPhys)
1343     {
1344         lpmemex->ullTotalPhys -= 1;
1345         lpmemex->ullAvailPhys -= 1;
1346     }
1347
1348     /* FIXME: should do something for other systems */
1349     GetSystemInfo(&si);
1350     lpmemex->ullTotalVirtual  = (ULONG_PTR)si.lpMaximumApplicationAddress-(ULONG_PTR)si.lpMinimumApplicationAddress;
1351     /* FIXME: we should track down all the already allocated VM pages and subtract them, for now arbitrarily remove 64KB so that it matches NT */
1352     lpmemex->ullAvailVirtual  = lpmemex->ullTotalVirtual-64*1024;
1353
1354     /* MSDN says about AvailExtendedVirtual: Size of unreserved and uncommitted
1355        memory in the extended portion of the virtual address space of the calling
1356        process, in bytes.
1357        However, I don't know what this means, so set it to zero :(
1358     */
1359     lpmemex->ullAvailExtendedVirtual = 0;
1360
1361     cached_memstatus = *lpmemex;
1362
1363     TRACE_(globalmem)("<-- LPMEMORYSTATUSEX: dwLength %d, dwMemoryLoad %d, ullTotalPhys %s, ullAvailPhys %s,"
1364           " ullTotalPageFile %s, ullAvailPageFile %s, ullTotalVirtual %s, ullAvailVirtual %s\n",
1365           lpmemex->dwLength, lpmemex->dwMemoryLoad, wine_dbgstr_longlong(lpmemex->ullTotalPhys),
1366           wine_dbgstr_longlong(lpmemex->ullAvailPhys), wine_dbgstr_longlong(lpmemex->ullTotalPageFile),
1367           wine_dbgstr_longlong(lpmemex->ullAvailPageFile), wine_dbgstr_longlong(lpmemex->ullTotalVirtual),
1368           wine_dbgstr_longlong(lpmemex->ullAvailVirtual) );
1369
1370     return TRUE;
1371 }
1372
1373 /***********************************************************************
1374  *           GlobalMemoryStatus   (KERNEL32.@)
1375  * Provides information about the status of the memory, so apps can tell
1376  * roughly how much they are able to allocate
1377  *
1378  * RETURNS
1379  *      None
1380  */
1381 VOID WINAPI GlobalMemoryStatus( LPMEMORYSTATUS lpBuffer )
1382 {
1383     MEMORYSTATUSEX memstatus;
1384     OSVERSIONINFOW osver;
1385     IMAGE_NT_HEADERS *nt = RtlImageNtHeader( GetModuleHandleW(0) );
1386
1387     /* Because GlobalMemoryStatus is identical to GlobalMemoryStatusEX save
1388        for one extra field in the struct, and the lack of a bug, we simply
1389        call GlobalMemoryStatusEx and copy the values across. */
1390     memstatus.dwLength = sizeof(memstatus);
1391     GlobalMemoryStatusEx(&memstatus);
1392
1393     lpBuffer->dwLength = sizeof(*lpBuffer);
1394     lpBuffer->dwMemoryLoad = memstatus.dwMemoryLoad;
1395
1396     /* Windows 2000 and later report -1 when values are greater than 4 Gb.
1397      * NT reports values modulo 4 Gb.
1398      */
1399
1400     osver.dwOSVersionInfoSize = sizeof(osver);
1401     GetVersionExW(&osver);
1402
1403     if ( osver.dwMajorVersion >= 5 || osver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS )
1404     {
1405         lpBuffer->dwTotalPhys = min( memstatus.ullTotalPhys, MAXDWORD );
1406         lpBuffer->dwAvailPhys = min( memstatus.ullAvailPhys, MAXDWORD );
1407         /* Limit value for apps that do not expect so much memory. Remove last 512 kb to make Sacrifice demo happy. */
1408         lpBuffer->dwTotalPageFile = min( memstatus.ullTotalPageFile, 0xfff7ffff );
1409         lpBuffer->dwAvailPageFile = min( memstatus.ullAvailPageFile, MAXDWORD );
1410         lpBuffer->dwTotalVirtual = min( memstatus.ullTotalVirtual, MAXDWORD );
1411         lpBuffer->dwAvailVirtual = min( memstatus.ullAvailVirtual, MAXDWORD );
1412
1413     }
1414     else /* duplicate NT bug */
1415     {
1416         lpBuffer->dwTotalPhys = memstatus.ullTotalPhys;
1417         lpBuffer->dwAvailPhys = memstatus.ullAvailPhys;
1418         lpBuffer->dwTotalPageFile = memstatus.ullTotalPageFile;
1419         lpBuffer->dwAvailPageFile = memstatus.ullAvailPageFile;
1420         lpBuffer->dwTotalVirtual = memstatus.ullTotalVirtual;
1421         lpBuffer->dwAvailVirtual = memstatus.ullAvailVirtual;
1422     }
1423
1424     /* values are limited to 2Gb unless the app has the IMAGE_FILE_LARGE_ADDRESS_AWARE flag */
1425     /* page file sizes are not limited (Adobe Illustrator 8 depends on this) */
1426     if (!(nt->FileHeader.Characteristics & IMAGE_FILE_LARGE_ADDRESS_AWARE))
1427     {
1428         if (lpBuffer->dwTotalPhys > MAXLONG) lpBuffer->dwTotalPhys = MAXLONG;
1429         if (lpBuffer->dwAvailPhys > MAXLONG) lpBuffer->dwAvailPhys = MAXLONG;
1430         if (lpBuffer->dwTotalVirtual > MAXLONG) lpBuffer->dwTotalVirtual = MAXLONG;
1431         if (lpBuffer->dwAvailVirtual > MAXLONG) lpBuffer->dwAvailVirtual = MAXLONG;
1432     }
1433
1434     /* work around for broken photoshop 4 installer */
1435     if ( lpBuffer->dwAvailPhys +  lpBuffer->dwAvailPageFile >= 2U*1024*1024*1024)
1436          lpBuffer->dwAvailPageFile = 2U*1024*1024*1024 -  lpBuffer->dwAvailPhys - 1;
1437
1438     /* limit page file size for really old binaries */
1439     if (nt->OptionalHeader.MajorSubsystemVersion < 4)
1440     {
1441         if (lpBuffer->dwTotalPageFile > MAXLONG) lpBuffer->dwTotalPageFile = MAXLONG;
1442         if (lpBuffer->dwAvailPageFile > MAXLONG) lpBuffer->dwAvailPageFile = MAXLONG;
1443     }
1444
1445     TRACE_(globalmem)("Length %u, MemoryLoad %u, TotalPhys %lx, AvailPhys %lx,"
1446           " TotalPageFile %lx, AvailPageFile %lx, TotalVirtual %lx, AvailVirtual %lx\n",
1447           lpBuffer->dwLength, lpBuffer->dwMemoryLoad, lpBuffer->dwTotalPhys,
1448           lpBuffer->dwAvailPhys, lpBuffer->dwTotalPageFile, lpBuffer->dwAvailPageFile,
1449           lpBuffer->dwTotalVirtual, lpBuffer->dwAvailVirtual );
1450 }
1451
1452 BOOL WINAPI GetSystemFileCacheSize(PSIZE_T mincache, PSIZE_T maxcache, PDWORD flags)
1453 {
1454     FIXME("stub: %p %p %p\n", mincache, maxcache, flags);
1455     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1456     return FALSE;
1457 }
1458
1459 BOOL WINAPI SetSystemFileCacheSize(SIZE_T mincache, SIZE_T maxcache, DWORD flags)
1460 {
1461     FIXME("stub: %ld %ld %d\n", mincache, maxcache, flags);
1462     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1463     return FALSE;
1464 }