memory/global.c

   1 /*
   2  * Global heap functions
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6 /* 0xffff sometimes seems to mean: CURRENT_DS */
   7
   8 #include <sys/types.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <string.h>
  12
  13 #include "windows.h"
  14 #include "global.h"
  15 #include "heap.h"
  16 #include "toolhelp.h"
  17 #include "selectors.h"
  18 #include "miscemu.h"
  19 #include "dde_mem.h"
  20 #include "stackframe.h"
  21 #include "module.h"
  22 #include "debug.h"
  23 #include "winerror.h"
  24
  25   /* Global arena block */
  26 typedef struct
  27 {
  28     DWORD     base;          /* Base address (0 if discarded) */
  29     DWORD     size;          /* Size in bytes (0 indicates a free block) */
  30     HGLOBAL16 handle;        /* Handle for this block */
  31     HGLOBAL16 hOwner;        /* Owner of this block */
  32     BYTE      lockCount;     /* Count of GlobalFix() calls */
  33     BYTE      pageLockCount; /* Count of GlobalPageLock() calls */
  34     BYTE      flags;         /* Allocation flags */
  35     BYTE      selCount;      /* Number of selectors allocated for this block */
  36 #ifdef CONFIG_IPC
  37     int       shmid;
  38 #endif
  39 } GLOBALARENA;
  40
  41   /* Flags definitions */
  42 #define GA_MOVEABLE     0x02  /* same as GMEM_MOVEABLE */
  43 #define GA_DGROUP       0x04
  44 #define GA_DISCARDABLE  0x08
  45 #define GA_IPCSHARE     0x10  /* same as GMEM_DDESHARE */
  46
  47   /* Arena array */
  48 static GLOBALARENA *pGlobalArena = NULL;
  49 static int globalArenaSize = 0;
  50
  51 #define GLOBAL_MAX_ALLOC_SIZE 0x00ff0000  /* Largest allocation is 16M - 64K */
  52
  53 #define VALID_HANDLE(handle) (((handle)>>__AHSHIFT)<globalArenaSize)
  54 #define GET_ARENA_PTR(handle)  (pGlobalArena + ((handle) >> __AHSHIFT))
  55
  56 /***********************************************************************
  57  *           GLOBAL_GetArena
  58  *
  59  * Return the arena for a given selector, growing the arena array if needed.
  60  */
  61 static GLOBALARENA *GLOBAL_GetArena( WORD sel, WORD selcount )
  62 {
  63     if (((sel >> __AHSHIFT) + selcount) > globalArenaSize)
  64     {
  65         int newsize = ((sel >> __AHSHIFT) + selcount + 0xff) & ~0xff;
  66         GLOBALARENA *pNewArena = realloc( pGlobalArena,
  67                                           newsize * sizeof(GLOBALARENA) );
  68         if (!pNewArena) return 0;
  69         pGlobalArena = pNewArena;
  70         memset( pGlobalArena + globalArenaSize, 0,
  71                 (newsize - globalArenaSize) * sizeof(GLOBALARENA) );
  72         globalArenaSize = newsize;
  73     }
  74     return pGlobalArena + (sel >> __AHSHIFT);
  75 }
  76
  77
  78 void debug_handles()
  79 {
  80     int printed=0;
  81     int i;
  82     for (i = globalArenaSize-1 ; i>=0 ; i--) {
  83         if (pGlobalArena[i].size!=0 && (pGlobalArena[i].handle & 0x8000)){
  84             printed=1;
  85             DUMP("0x%08x, ",pGlobalArena[i].handle);
  86         }
  87     }
  88     if (printed)
  89         DUMP("\n");
  90 }
  91
  92
  93 /***********************************************************************
  94  *           GLOBAL_CreateBlock
  95  *
  96  * Create a global heap block for a fixed range of linear memory.
  97  */
  98 HGLOBAL16 GLOBAL_CreateBlock( WORD flags, const void *ptr, DWORD size,
  99                               HGLOBAL16 hOwner, BOOL16 isCode,
 100                               BOOL16 is32Bit, BOOL16 isReadOnly,
 101                               SHMDATA *shmdata  )
 102 {
 103     WORD sel, selcount;
 104     GLOBALARENA *pArena;
 105
 106       /* Allocate the selector(s) */
 107
 108     sel = SELECTOR_AllocBlock( ptr, size,
 109                               isCode ? SEGMENT_CODE : SEGMENT_DATA,
 110                               is32Bit, isReadOnly );
 111
 112     if (!sel) return 0;
 113     selcount = (size + 0xffff) / 0x10000;
 114
 115     if (!(pArena = GLOBAL_GetArena( sel, selcount )))
 116     {
 117         SELECTOR_FreeBlock( sel, selcount );
 118         return 0;
 119     }
 120
 121       /* Fill the arena block */
 122
 123     pArena->base = (DWORD)ptr;
 124     pArena->size = GET_SEL_LIMIT(sel) + 1;
 125
 126 #ifdef CONFIG_IPC
 127     if (flags & GMEM_DDESHARE)
 128     {
 129         pArena->handle = shmdata->handle;
 130         pArena->shmid  = shmdata->shmid;
 131         shmdata->sel   = sel;
 132     }
 133     else
 134     {
 135         pArena->handle = (flags & GMEM_MOVEABLE) ? sel - 1 : sel;
 136         pArena->shmid  = 0;
 137     }
 138 #else
 139     pArena->handle = (flags & GMEM_MOVEABLE) ? sel - 1 : sel;
 140 #endif
 141     pArena->hOwner = hOwner;
 142     pArena->lockCount = 0;
 143     pArena->pageLockCount = 0;
 144     pArena->flags = flags & GA_MOVEABLE;
 145     if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
 146     if (flags & GMEM_DDESHARE) pArena->flags |= GA_IPCSHARE;
 147     if (!isCode) pArena->flags |= GA_DGROUP;
 148     pArena->selCount = selcount;
 149     if (selcount > 1)  /* clear the next arena blocks */
 150         memset( pArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
 151
 152     return pArena->handle;
 153 }
 154
 155
 156 /***********************************************************************
 157  *           GLOBAL_FreeBlock
 158  *
 159  * Free a block allocated by GLOBAL_CreateBlock, without touching
 160  * the associated linear memory range.
 161  */
 162 BOOL16 GLOBAL_FreeBlock( HGLOBAL16 handle )
 163 {
 164     WORD sel;
 165     GLOBALARENA *pArena;
 166
 167     if (!handle) return TRUE;
 168     sel = GlobalHandleToSel( handle );
 169     if (!VALID_HANDLE(sel))
 170         return FALSE;
 171     pArena = GET_ARENA_PTR(sel);
 172     SELECTOR_FreeBlock( sel, (pArena->size + 0xffff) / 0x10000 );
 173     memset( pArena, 0, sizeof(GLOBALARENA) );
 174     return TRUE;
 175 }
 176
 177 /***********************************************************************
 178  *           GLOBAL_MoveBlock
 179  */
 180 BOOL16 GLOBAL_MoveBlock( HGLOBAL16 handle, const void *ptr, DWORD size )
 181 {
 182     WORD sel;
 183     GLOBALARENA *pArena;
 184
 185     if (!handle) return TRUE;
 186     sel = GlobalHandleToSel( handle );
 187     if (!VALID_HANDLE(sel))
 188         return FALSE;
 189     pArena = GET_ARENA_PTR(sel);
 190     if (pArena->selCount != 1)
 191         return FALSE;
 192
 193     pArena->base = (DWORD)ptr;
 194     pArena->size = size;
 195
 196     SELECTOR_MoveBlock( sel, ptr );
 197     SetSelectorLimit( sel, size-1 );
 198
 199     return TRUE;
 200 }
 201
 202 /***********************************************************************
 203  *           GLOBAL_Alloc
 204  *
 205  * Implementation of GlobalAlloc16()
 206  */
 207 HGLOBAL16 GLOBAL_Alloc( UINT16 flags, DWORD size, HGLOBAL16 hOwner,
 208                         BOOL16 isCode, BOOL16 is32Bit, BOOL16 isReadOnly )
 209 {
 210     void *ptr;
 211     HGLOBAL16 handle;
 212     SHMDATA shmdata;
 213
 214     TRACE(global, "%ld flags=%04x\n", size, flags );
 215
 216     /* If size is 0, create a discarded block */
 217
 218     if (size == 0) return GLOBAL_CreateBlock( flags, NULL, 1, hOwner, isCode,
 219                                               is32Bit, isReadOnly, NULL );
 220
 221     /* Fixup the size */
 222
 223     if (size >= GLOBAL_MAX_ALLOC_SIZE - 0x1f) return 0;
 224     size = (size + 0x1f) & ~0x1f;
 225
 226       /* Allocate the linear memory */
 227
 228 #ifdef CONFIG_IPC
 229     if (flags & GMEM_DDESHARE)
 230         ptr = DDE_malloc(flags, size, &shmdata);
 231     else
 232 #endif  /* CONFIG_IPC */
 233     {
 234         ptr = HeapAlloc( SystemHeap, 0, size );
 235     }
 236       /* FIXME: free discardable blocks and try again? */
 237     if (!ptr) return 0;
 238
 239       /* Allocate the selector(s) */
 240
 241     handle = GLOBAL_CreateBlock( flags, ptr, size, hOwner,
 242                                 isCode, is32Bit, isReadOnly, &shmdata);
 243     if (!handle)
 244     {
 245         HeapFree( SystemHeap, 0, ptr );
 246         return 0;
 247     }
 248
 249     if (flags & GMEM_ZEROINIT) memset( ptr, 0, size );
 250     return handle;
 251 }
 252
 253
 254 #ifdef CONFIG_IPC
 255 /***********************************************************************
 256  *           GLOBAL_FindArena
 257  *
 258  * Find the arena  for a given handle
 259  * (when handle is not serial - e.g. DDE)
 260  */
 261 static GLOBALARENA *GLOBAL_FindArena( HGLOBAL16 handle)
 262 {
 263     int i;
 264     for (i = globalArenaSize-1 ; i>=0 ; i--) {
 265         if (pGlobalArena[i].size!=0 && pGlobalArena[i].handle == handle)
 266             return ( &pGlobalArena[i] );
 267     }
 268     return NULL;
 269 }
 270
 271
 272 /***********************************************************************
 273  *           DDE_GlobalHandleToSel
 274  */
 275
 276 WORD DDE_GlobalHandleToSel( HGLOBAL16 handle )
 277 {
 278     GLOBALARENA *pArena;
 279     SEGPTR segptr;
 280
 281     pArena= GLOBAL_FindArena(handle);
 282     if (pArena) {
 283         int ArenaIdx = pArena - pGlobalArena;
 284
 285         /* See if synchronized to the shared memory  */
 286         return DDE_SyncHandle(handle, ( ArenaIdx << __AHSHIFT) | 7);
 287     }
 288
 289     /* attach the block */
 290     DDE_AttachHandle(handle, &segptr);
 291
 292     return SELECTOROF( segptr );
 293 }
 294 #endif  /* CONFIG_IPC */
 295
 296
 297 /***********************************************************************
 298  *           GlobalAlloc16   (KERNEL.15)
 299  * RETURNS
 300  *      Handle: Success
 301  *      NULL: Failure
 302  */
 303 HGLOBAL16 WINAPI GlobalAlloc16(
 304                  UINT16 flags, /* [in] Object allocation attributes */
 305                  DWORD size    /* [in] Number of bytes to allocate */
 306 ) {
 307     HANDLE16 owner = GetCurrentPDB();
 308
 309     if (flags & GMEM_DDESHARE)
 310         owner = GetExePtr(owner);  /* Make it a module handle */
 311     return GLOBAL_Alloc( flags, size, owner, FALSE, FALSE, FALSE );
 312 }
 313
 314
 315 /***********************************************************************
 316  *           GlobalReAlloc16   (KERNEL.16)
 317  * RETURNS
 318  *      Handle: Success
 319  *      NULL: Failure
 320  */
 321 HGLOBAL16 WINAPI GlobalReAlloc16(
 322                  HGLOBAL16 handle, /* [in] Handle of global memory object */
 323                  DWORD size,       /* [in] New size of block */
 324                  UINT16 flags      /* [in] How to reallocate object */
 325 ) {
 326     WORD selcount;
 327     DWORD oldsize;
 328     void *ptr;
 329     GLOBALARENA *pArena, *pNewArena;
 330     WORD sel = GlobalHandleToSel( handle );
 331
 332     TRACE(global, "%04x %ld flags=%04x\n",
 333                     handle, size, flags );
 334     if (!handle) return 0;
 335
 336 #ifdef CONFIG_IPC
 337     if (flags & GMEM_DDESHARE || is_dde_handle(handle))
 338     {
 339         FIXME(global, "shared memory reallocating unimplemented\n");
 340         return 0;
 341     }
 342 #endif  /* CONFIG_IPC */
 343
 344     if (!VALID_HANDLE(handle)) {
 345         WARN(global, "Invalid handle 0x%04x!\n", handle);
 346         return 0;
 347     }
 348     pArena = GET_ARENA_PTR( handle );
 349
 350       /* Discard the block if requested */
 351
 352     if ((size == 0) && (flags & GMEM_MOVEABLE) && !(flags & GMEM_MODIFY))
 353     {
 354         if (!(pArena->flags & GA_MOVEABLE) ||
 355             !(pArena->flags & GA_DISCARDABLE) ||
 356             (pArena->lockCount > 0) || (pArena->pageLockCount > 0)) return 0;
 357         HeapFree( SystemHeap, 0, (void *)pArena->base );
 358         pArena->base = 0;
 359
 360         /* Note: we rely on the fact that SELECTOR_ReallocBlock won't
 361          * change the selector if we are shrinking the block.
 362          * FIXME: shouldn't we keep selectors until the block is deleted?
 363          */
 364         SELECTOR_ReallocBlock( sel, 0, 1, SEGMENT_DATA, 0, 0 );
 365         return handle;
 366     }
 367
 368       /* Fixup the size */
 369
 370     if (size > GLOBAL_MAX_ALLOC_SIZE - 0x20) return 0;
 371     if (size == 0) size = 0x20;
 372     else size = (size + 0x1f) & ~0x1f;
 373
 374       /* Change the flags */
 375
 376     if (flags & GMEM_MODIFY)
 377     {
 378           /* Change the flags, leaving GA_DGROUP alone */
 379         pArena->flags = (pArena->flags & GA_DGROUP) | (flags & GA_MOVEABLE);
 380         if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
 381         return handle;
 382     }
 383
 384       /* Reallocate the linear memory */
 385
 386     ptr = (void *)pArena->base;
 387     oldsize = pArena->size;
 388     TRACE(global,"oldsize %08lx\n",oldsize);
 389     if (ptr && (size == oldsize)) return handle;  /* Nothing to do */
 390
 391     ptr = HeapReAlloc( SystemHeap, 0, ptr, size );
 392     if (!ptr)
 393     {
 394         SELECTOR_FreeBlock( sel, (oldsize + 0xffff) / 0x10000 );
 395         memset( pArena, 0, sizeof(GLOBALARENA) );
 396         return 0;
 397     }
 398
 399       /* Reallocate the selector(s) */
 400
 401     sel = SELECTOR_ReallocBlock( sel, ptr, size, SEGMENT_DATA, 0, 0 );
 402     if (!sel)
 403     {
 404         HeapFree( SystemHeap, 0, ptr );
 405         memset( pArena, 0, sizeof(GLOBALARENA) );
 406         return 0;
 407     }
 408     selcount = (size + 0xffff) / 0x10000;
 409
 410     if (!(pNewArena = GLOBAL_GetArena( sel, selcount )))
 411     {
 412         HeapFree( SystemHeap, 0, ptr );
 413         SELECTOR_FreeBlock( sel, selcount );
 414         return 0;
 415     }
 416
 417       /* Fill the new arena block */
 418
 419     if (pNewArena != pArena) memcpy( pNewArena, pArena, sizeof(GLOBALARENA) );
 420     pNewArena->base = (DWORD)ptr;
 421     pNewArena->size = GET_SEL_LIMIT(sel) + 1;
 422     pNewArena->selCount = selcount;
 423     pNewArena->handle = (pNewArena->flags & GA_MOVEABLE) ? sel - 1 : sel;
 424
 425     if (selcount > 1)  /* clear the next arena blocks */
 426         memset( pNewArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
 427
 428     if ((oldsize < size) && (flags & GMEM_ZEROINIT))
 429         memset( (char *)ptr + oldsize, 0, size - oldsize );
 430     return pNewArena->handle;
 431 }
 432
 433
 434 /***********************************************************************
 435  *           GlobalFree16   (KERNEL.17)
 436  * RETURNS
 437  *      NULL: Success
 438  *      Handle: Failure
 439  */
 440 HGLOBAL16 WINAPI GlobalFree16(
 441                  HGLOBAL16 handle /* [in] Handle of global memory object */
 442 ) {
 443     void *ptr;
 444
 445     if (!VALID_HANDLE(handle)) {
 446         WARN(global,"Invalid handle 0x%04x passed to GlobalFree16!\n",handle);
 447         return 0;
 448     }
 449     ptr = (void *)GET_ARENA_PTR(handle)->base;
 450
 451     TRACE(global, "%04x\n", handle );
 452     if (!GLOBAL_FreeBlock( handle )) return handle;  /* failed */
 453 #ifdef CONFIG_IPC
 454     if (is_dde_handle(handle)) return DDE_GlobalFree(handle);
 455 #endif  /* CONFIG_IPC */
 456     if (ptr) HeapFree( SystemHeap, 0, ptr );
 457     return 0;
 458 }
 459
 460
 461 /***********************************************************************
 462  *           WIN16_GlobalLock16   (KERNEL.18)
 463  *
 464  * This is the GlobalLock16() function used by 16-bit code.
 465  */
 466 SEGPTR WINAPI WIN16_GlobalLock16( HGLOBAL16 handle )
 467 {
 468     TRACE(global, "(%04x) -> %08lx\n",
 469                     handle, MAKELONG( 0, GlobalHandleToSel(handle)) );
 470     if (handle)
 471     {
 472         if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
 473
 474 #ifdef CONFIG_IPC
 475         if (is_dde_handle(handle))
 476             return PTR_SEG_OFF_TO_SEGPTR( DDE_GlobalHandleToSel(handle), 0 );
 477 #endif  /* CONFIG_IPC */
 478
 479         if (!VALID_HANDLE(handle)) {
 480             WARN(global,"Invalid handle 0x%04x passed to WIN16_GlobalLock16!\n",handle);
 481             return (SEGPTR)0;
 482         }
 483         if (!GET_ARENA_PTR(handle)->base) return (SEGPTR)0;
 484         GET_ARENA_PTR(handle)->lockCount++;
 485         return PTR_SEG_OFF_TO_SEGPTR( GlobalHandleToSel(handle), 0 );
 486         /* FIXME: put segment value in CX as well */
 487     }
 488     return (SEGPTR)0;
 489 }
 490
 491
 492 /***********************************************************************
 493  *           GlobalLock16   (KERNEL.18)
 494  *
 495  * This is the GlobalLock16() function used by 32-bit code.
 496  *
 497  * RETURNS
 498  *      Pointer to first byte of memory block
 499  *      NULL: Failure
 500  */
 501 LPVOID WINAPI GlobalLock16(
 502               HGLOBAL16 handle /* [in] Handle of global memory object */
 503 ) {
 504     if (!handle) return 0;
 505     if (!VALID_HANDLE(handle))
 506         return (LPVOID)0;
 507     GET_ARENA_PTR(handle)->lockCount++;
 508 #ifdef CONFIG_IPC
 509     if (is_dde_handle(handle)) return DDE_AttachHandle(handle, NULL);
 510 #endif
 511     return (LPVOID)GET_ARENA_PTR(handle)->base;
 512 }
 513
 514
 515 /***********************************************************************
 516  *           GlobalUnlock16   (KERNEL.19)
 517  * NOTES
 518  *      Should the return values be cast to booleans?
 519  *
 520  * RETURNS
 521  *      TRUE: Object is still locked
 522  *      FALSE: Object is unlocked
 523  */
 524 BOOL16 WINAPI GlobalUnlock16(
 525               HGLOBAL16 handle /* [in] Handle of global memory object */
 526 ) {
 527     GLOBALARENA *pArena = GET_ARENA_PTR(handle);
 528     if (!VALID_HANDLE(handle)) {
 529         WARN(global,"Invalid handle 0x%04x passed to GlobalUnlock16!\n",handle);
 530         return 0;
 531     }
 532     TRACE(global, "%04x\n", handle );
 533     if (pArena->lockCount) pArena->lockCount--;
 534     return pArena->lockCount;
 535 }
 536
 537
 538 /***********************************************************************
 539  *           GlobalSize16   (KERNEL.20)
 540  * RETURNS
 541  *      Size in bytes of object
 542  *      0: Failure
 543  */
 544 DWORD WINAPI GlobalSize16(
 545              HGLOBAL16 handle /* [in] Handle of global memory object */
 546 ) {
 547     TRACE(global, "%04x\n", handle );
 548     if (!handle) return 0;
 549     if (!VALID_HANDLE(handle))
 550         return 0;
 551     return GET_ARENA_PTR(handle)->size;
 552 }
 553
 554
 555 /***********************************************************************
 556  *           GlobalHandle16   (KERNEL.21)
 557  * NOTES
 558  *      Why is GlobalHandleToSel used here with the sel as input?
 559  *
 560  * RETURNS
 561  *      Handle: Success
 562  *      NULL: Failure
 563  */
 564 DWORD WINAPI GlobalHandle16(
 565              WORD sel /* [in] Address of global memory block */
 566 ) {
 567     TRACE(global, "%04x\n", sel );
 568     if (!VALID_HANDLE(sel)) {
 569         WARN(global,"Invalid handle 0x%04x passed to GlobalHandle16!\n",sel);
 570         return 0;
 571     }
 572     return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel(sel) );
 573 }
 574
 575 /***********************************************************************
 576  *           GlobalHandleNoRIP   (KERNEL.159)
 577  */
 578 DWORD WINAPI GlobalHandleNoRIP( WORD sel )
 579 {
 580     int i;
 581     for (i = globalArenaSize-1 ; i>=0 ; i--) {
 582         if (pGlobalArena[i].size!=0 && pGlobalArena[i].handle == sel)
 583                 return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel(sel) );
 584     }
 585     return 0;
 586 }
 587
 588
 589 /***********************************************************************
 590  *           GlobalFlags16   (KERNEL.22)
 591  * NOTES
 592  *      Should this return GMEM_INVALID_HANDLE instead of 0 on invalid
 593  *      handle?
 594  *
 595  * RETURNS
 596  *      Value specifying flags and lock count
 597  *      GMEM_INVALID_HANDLE: Invalid handle
 598  */
 599 UINT16 WINAPI GlobalFlags16(
 600               HGLOBAL16 handle /* [in] Handle of global memory object */
 601 ) {
 602     GLOBALARENA *pArena;
 603
 604     TRACE(global, "%04x\n", handle );
 605     if (!VALID_HANDLE(handle)) {
 606         WARN(global,"Invalid handle 0x%04x passed to GlobalFlags16!\n",handle);
 607         return 0;
 608     }
 609     pArena = GET_ARENA_PTR(handle);
 610     return pArena->lockCount |
 611            ((pArena->flags & GA_DISCARDABLE) ? GMEM_DISCARDABLE : 0) |
 612            ((pArena->base == 0) ? GMEM_DISCARDED : 0);
 613 }
 614
 615
 616 /***********************************************************************
 617  *           LockSegment16   (KERNEL.23)
 618  */
 619 HGLOBAL16 WINAPI LockSegment16( HGLOBAL16 handle )
 620 {
 621     TRACE(global, "%04x\n", handle );
 622     if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
 623     if (!VALID_HANDLE(handle)) {
 624         WARN(global,"Invalid handle 0x%04x passed to LockSegment16!\n",handle);
 625         return 0;
 626     }
 627     GET_ARENA_PTR(handle)->lockCount++;
 628     return handle;
 629 }
 630
 631
 632 /***********************************************************************
 633  *           UnlockSegment16   (KERNEL.24)
 634  */
 635 void WINAPI UnlockSegment16( HGLOBAL16 handle )
 636 {
 637     TRACE(global, "%04x\n", handle );
 638     if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
 639     if (!VALID_HANDLE(handle)) {
 640         WARN(global,"Invalid handle 0x%04x passed to UnlockSegment16!\n",handle);
 641         return;
 642     }
 643     GET_ARENA_PTR(handle)->lockCount--;
 644     /* FIXME: this ought to return the lock count in CX (go figure...) */
 645 }
 646
 647
 648 /***********************************************************************
 649  *           GlobalCompact16   (KERNEL.25)
 650  */
 651 DWORD WINAPI GlobalCompact16( DWORD desired )
 652 {
 653     return GLOBAL_MAX_ALLOC_SIZE;
 654 }
 655
 656
 657 /***********************************************************************
 658  *           GlobalFreeAll   (KERNEL.26)
 659  */
 660 void WINAPI GlobalFreeAll( HGLOBAL16 owner )
 661 {
 662     DWORD i;
 663     GLOBALARENA *pArena;
 664
 665     pArena = pGlobalArena;
 666     for (i = 0; i < globalArenaSize; i++, pArena++)
 667     {
 668         if ((pArena->size != 0) && (pArena->hOwner == owner))
 669             GlobalFree16( pArena->handle );
 670     }
 671 }
 672
 673
 674 /***********************************************************************
 675  *           GlobalWire16   (KERNEL.111)
 676  */
 677 SEGPTR WINAPI GlobalWire16( HGLOBAL16 handle )
 678 {
 679     return WIN16_GlobalLock16( handle );
 680 }
 681
 682
 683 /***********************************************************************
 684  *           GlobalUnWire16   (KERNEL.112)
 685  */
 686 BOOL16 WINAPI GlobalUnWire16( HGLOBAL16 handle )
 687 {
 688     return !GlobalUnlock16( handle );
 689 }
 690
 691
 692 /***********************************************************************
 693  *           SetSwapAreaSize16   (KERNEL.106)
 694  */
 695 LONG WINAPI SetSwapAreaSize16( WORD size )
 696 {
 697     FIXME(global, "(%d) - stub!\n", size );
 698     return MAKELONG( size, 0xffff );
 699 }
 700
 701
 702 /***********************************************************************
 703  *           GlobalLRUOldest   (KERNEL.163)
 704  */
 705 HGLOBAL16 WINAPI GlobalLRUOldest( HGLOBAL16 handle )
 706 {
 707     TRACE(global, "%04x\n", handle );
 708     if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
 709     return handle;
 710 }
 711
 712
 713 /***********************************************************************
 714  *           GlobalLRUNewest   (KERNEL.164)
 715  */
 716 HGLOBAL16 WINAPI GlobalLRUNewest( HGLOBAL16 handle )
 717 {
 718     TRACE(global, "%04x\n", handle );
 719     if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
 720     return handle;
 721 }
 722
 723
 724 /***********************************************************************
 725  *           GetFreeSpace16   (KERNEL.169)
 726  */
 727 DWORD WINAPI GetFreeSpace16( UINT16 wFlags )
 728 {
 729     MEMORYSTATUS ms;
 730     GlobalMemoryStatus( &ms );
 731     return ms.dwAvailVirtual;
 732 }
 733
 734 /***********************************************************************
 735  *           GlobalDOSAlloc   (KERNEL.184)
 736  * RETURNS
 737  *      Address (HW=Paragraph segment; LW=Selector)
 738  */
 739 DWORD WINAPI GlobalDOSAlloc(
 740              DWORD size /* [in] Number of bytes to be allocated */
 741 ) {
 742    UINT16    uParagraph;
 743    LPVOID    lpBlock = DOSMEM_GetBlock( 0, size, &uParagraph );
 744
 745    if( lpBlock )
 746    {
 747        HMODULE16 hModule = GetModuleHandle16("KERNEL");
 748        WORD      wSelector;
 749
 750        wSelector = GLOBAL_CreateBlock(GMEM_FIXED, lpBlock, size,
 751                                       hModule, 0, 0, 0, NULL );
 752        return MAKELONG(wSelector,uParagraph);
 753    }
 754    return 0;
 755 }
 756
 757
 758 /***********************************************************************
 759  *           GlobalDOSFree      (KERNEL.185)
 760  * RETURNS
 761  *      NULL: Success
 762  *      sel: Failure
 763  */
 764 WORD WINAPI GlobalDOSFree(
 765             WORD sel /* [in] Selector */
 766 ) {
 767    DWORD   block = GetSelectorBase(sel);
 768
 769    if( block && block < 0x100000 )
 770    {
 771        LPVOID lpBlock = DOSMEM_MapDosToLinear( block );
 772        if( DOSMEM_FreeBlock( 0, lpBlock ) )
 773            GLOBAL_FreeBlock( sel );
 774        sel = 0;
 775    }
 776    return sel;
 777 }
 778
 779
 780 /***********************************************************************
 781  *           GlobalPageLock   (KERNEL.191)
 782  */
 783 WORD WINAPI GlobalPageLock( HGLOBAL16 handle )
 784 {
 785     TRACE(global, "%04x\n", handle );
 786     if (!VALID_HANDLE(handle)) {
 787         WARN(global,"Invalid handle 0x%04x passed to GlobalPageLock!\n",handle);
 788         return 0;
 789     }
 790     return ++(GET_ARENA_PTR(handle)->pageLockCount);
 791 }
 792
 793
 794 /***********************************************************************
 795  *           GlobalPageUnlock   (KERNEL.192)
 796  */
 797 WORD WINAPI GlobalPageUnlock( HGLOBAL16 handle )
 798 {
 799     TRACE(global, "%04x\n", handle );
 800     if (!VALID_HANDLE(handle)) {
 801         WARN(global,"Invalid handle 0x%04x passed to GlobalPageUnlock!\n",handle);
 802         return 0;
 803     }
 804     return --(GET_ARENA_PTR(handle)->pageLockCount);
 805 }
 806
 807
 808 /***********************************************************************
 809  *           GlobalFix16   (KERNEL.197)
 810  */
 811 void WINAPI GlobalFix16( HGLOBAL16 handle )
 812 {
 813     TRACE(global, "%04x\n", handle );
 814     if (!VALID_HANDLE(handle)) {
 815         WARN(global,"Invalid handle 0x%04x passed to GlobalFix16!\n",handle);
 816         return;
 817     }
 818     GET_ARENA_PTR(handle)->lockCount++;
 819 }
 820
 821
 822 /***********************************************************************
 823  *           GlobalUnfix16   (KERNEL.198)
 824  */
 825 void WINAPI GlobalUnfix16( HGLOBAL16 handle )
 826 {
 827     TRACE(global, "%04x\n", handle );
 828     if (!VALID_HANDLE(handle)) {
 829         WARN(global,"Invalid handle 0x%04x passed to GlobalUnfix16!\n",handle);
 830         return;
 831     }
 832     GET_ARENA_PTR(handle)->lockCount--;
 833 }
 834
 835
 836 /***********************************************************************
 837  *           FarSetOwner   (KERNEL.403)
 838  */
 839 void WINAPI FarSetOwner( HGLOBAL16 handle, HANDLE16 hOwner )
 840 {
 841     if (!VALID_HANDLE(handle)) {
 842         WARN(global,"Invalid handle 0x%04x passed to FarSetOwner!\n",handle);
 843         return;
 844     }
 845     GET_ARENA_PTR(handle)->hOwner = hOwner;
 846 }
 847
 848
 849 /***********************************************************************
 850  *           FarGetOwner   (KERNEL.404)
 851  */
 852 HANDLE16 WINAPI FarGetOwner( HGLOBAL16 handle )
 853 {
 854     if (!VALID_HANDLE(handle)) {
 855         WARN(global,"Invalid handle 0x%04x passed to FarGetOwner!\n",handle);
 856         return 0;
 857     }
 858     return GET_ARENA_PTR(handle)->hOwner;
 859 }
 860
 861
 862 /***********************************************************************
 863  *           GlobalHandleToSel   (TOOLHELP.50)
 864  */
 865 WORD WINAPI GlobalHandleToSel( HGLOBAL16 handle )
 866 {
 867     TRACE(toolhelp, "%04x\n", handle );
 868     if (!handle) return 0;
 869 #ifdef CONFIG_IPC
 870     if (is_dde_handle(handle)) return DDE_GlobalHandleToSel(handle);
 871 #endif
 872     if (!VALID_HANDLE(handle)) {
 873         WARN(global,"Invalid handle 0x%04x passed to GlobalHandleToSel!\n",handle);
 874         return 0;
 875     }
 876     if (!(handle & 7))
 877     {
 878         WARN(global, "Program attempted invalid selector conversion\n" );
 879         return handle - 1;
 880     }
 881     return handle | 7;
 882 }
 883
 884
 885 /***********************************************************************
 886  *           GlobalFirst   (TOOLHELP.51)
 887  */
 888 BOOL16 WINAPI GlobalFirst( GLOBALENTRY *pGlobal, WORD wFlags )
 889 {
 890     if (wFlags == GLOBAL_LRU) return FALSE;
 891     pGlobal->dwNext = 0;
 892     return GlobalNext( pGlobal, wFlags );
 893 }
 894
 895
 896 /***********************************************************************
 897  *           GlobalNext   (TOOLHELP.52)
 898  */
 899 BOOL16 WINAPI GlobalNext( GLOBALENTRY *pGlobal, WORD wFlags)
 900 {
 901     GLOBALARENA *pArena;
 902
 903     if (pGlobal->dwNext >= globalArenaSize) return FALSE;
 904     pArena = pGlobalArena + pGlobal->dwNext;
 905     if (wFlags == GLOBAL_FREE)  /* only free blocks */
 906     {
 907         int i;
 908         for (i = pGlobal->dwNext; i < globalArenaSize; i++, pArena++)
 909             if (pArena->size == 0) break;  /* block is free */
 910         if (i >= globalArenaSize) return FALSE;
 911         pGlobal->dwNext = i;
 912     }
 913
 914     pGlobal->dwAddress    = pArena->base;
 915     pGlobal->dwBlockSize  = pArena->size;
 916     pGlobal->hBlock       = pArena->handle;
 917     pGlobal->wcLock       = pArena->lockCount;
 918     pGlobal->wcPageLock   = pArena->pageLockCount;
 919     pGlobal->wFlags       = (GetCurrentPDB() == pArena->hOwner);
 920     pGlobal->wHeapPresent = FALSE;
 921     pGlobal->hOwner       = pArena->hOwner;
 922     pGlobal->wType        = GT_UNKNOWN;
 923     pGlobal->wData        = 0;
 924     pGlobal->dwNext++;
 925     return TRUE;
 926 }
 927
 928
 929 /***********************************************************************
 930  *           GlobalInfo   (TOOLHELP.53)
 931  */
 932 BOOL16 WINAPI GlobalInfo( GLOBALINFO *pInfo )
 933 {
 934     int i;
 935     GLOBALARENA *pArena;
 936
 937     pInfo->wcItems = globalArenaSize;
 938     pInfo->wcItemsFree = 0;
 939     pInfo->wcItemsLRU = 0;
 940     for (i = 0, pArena = pGlobalArena; i < globalArenaSize; i++, pArena++)
 941         if (pArena->size == 0) pInfo->wcItemsFree++;
 942     return TRUE;
 943 }
 944
 945
 946 /***********************************************************************
 947  *           GlobalEntryHandle   (TOOLHELP.54)
 948  */
 949 BOOL16 WINAPI GlobalEntryHandle( GLOBALENTRY *pGlobal, HGLOBAL16 hItem )
 950 {
 951     GLOBALARENA *pArena = GET_ARENA_PTR(hItem);
 952
 953     pGlobal->dwAddress    = pArena->base;
 954     pGlobal->dwBlockSize  = pArena->size;
 955     pGlobal->hBlock       = pArena->handle;
 956     pGlobal->wcLock       = pArena->lockCount;
 957     pGlobal->wcPageLock   = pArena->pageLockCount;
 958     pGlobal->wFlags       = (GetCurrentPDB() == pArena->hOwner);
 959     pGlobal->wHeapPresent = FALSE;
 960     pGlobal->hOwner       = pArena->hOwner;
 961     pGlobal->wType        = GT_UNKNOWN;
 962     pGlobal->wData        = 0;
 963     pGlobal->dwNext++;
 964     return TRUE;
 965 }
 966
 967
 968 /***********************************************************************
 969  *           GlobalEntryModule   (TOOLHELP.55)
 970  */
 971 BOOL16 WINAPI GlobalEntryModule( GLOBALENTRY *pGlobal, HMODULE16 hModule,
 972                                  WORD wSeg )
 973 {
 974     return FALSE;
 975 }
 976
 977
 978 /***********************************************************************
 979  *           MemManInfo   (TOOLHELP.72)
 980  */
 981 BOOL16 WINAPI MemManInfo( MEMMANINFO *info )
 982 {
 983     MEMORYSTATUS status;
 984
 985     /*
 986      * Not unsurprisingly although the documention says you
 987      * _must_ provide the size in the dwSize field, this function
 988      * (under Windows) always fills the structure and returns true.
 989      */
 990     GlobalMemoryStatus( &status );
 991     info->wPageSize            = VIRTUAL_GetPageSize();
 992     info->dwLargestFreeBlock   = status.dwAvailVirtual;
 993     info->dwMaxPagesAvailable  = info->dwLargestFreeBlock / info->wPageSize;
 994     info->dwMaxPagesLockable   = info->dwMaxPagesAvailable;
 995     info->dwTotalLinearSpace   = status.dwTotalVirtual / info->wPageSize;
 996     info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
 997     info->dwFreePages          = info->dwMaxPagesAvailable;
 998     info->dwTotalPages         = info->dwTotalLinearSpace;
 999     info->dwFreeLinearSpace    = info->dwMaxPagesAvailable;
1000     info->dwSwapFilePages      = status.dwTotalPageFile / info->wPageSize;
1001     return TRUE;
1002 }
1003
1004 /***********************************************************************
1005  *           GetFreeMemInfo   (KERNEL.316)
1006  */
1007 DWORD WINAPI GetFreeMemInfo(void)
1008 {
1009     MEMMANINFO info;
1010     MemManInfo( &info );
1011     return MAKELONG( info.dwTotalLinearSpace, info.dwMaxPagesAvailable );
1012 }
1013
1014 /*
1015  * Win32 Global heap functions (GlobalXXX).
1016  * These functions included in Win32 for compatibility with 16 bit Windows
1017  * Especially the moveable blocks and handles are oldish.
1018  * But the ability to directly allocate memory with GPTR and LPTR is widely
1019  * used.
1020  *
1021  * The handle stuff looks horrible, but it's implemented almost like Win95
1022  * does it.
1023  *
1024  */
1025
1026 #define MAGIC_GLOBAL_USED 0x5342
1027 #define GLOBAL_LOCK_MAX   0xFF
1028 #define HANDLE_TO_INTERN(h)  ((PGLOBAL32_INTERN)(((char *)(h))-2))
1029 #define INTERN_TO_HANDLE(i)  ((HGLOBAL32) &((i)->Pointer))
1030 #define POINTER_TO_HANDLE(p) (*(((HGLOBAL32 *)(p))-1))
1031 #define ISHANDLE(h)          (((DWORD)(h)&2)!=0)
1032 #define ISPOINTER(h)         (((DWORD)(h)&2)==0)
1033
1034 typedef struct __GLOBAL32_INTERN
1035 {
1036    WORD         Magic;
1037    LPVOID       Pointer WINE_PACKED;
1038    BYTE         Flags;
1039    BYTE         LockCount;
1040 } GLOBAL32_INTERN, *PGLOBAL32_INTERN;
1041
1042
1043 /***********************************************************************
1044  *           GlobalAlloc32   (KERNEL32.315)
1045  * RETURNS
1046  *      Handle: Success
1047  *      NULL: Failure
1048  */
1049 HGLOBAL32 WINAPI GlobalAlloc32(
1050                  UINT32 flags, /* [in] Object allocation attributes */
1051                  DWORD size    /* [in] Number of bytes to allocate */
1052 ) {
1053    PGLOBAL32_INTERN     pintern;
1054    DWORD                hpflags;
1055    LPVOID               palloc;
1056
1057    if(flags&GMEM_ZEROINIT)
1058       hpflags=HEAP_ZERO_MEMORY;
1059    else
1060       hpflags=0;
1061
1062    if((flags & GMEM_MOVEABLE)==0) /* POINTER */
1063    {
1064       palloc=HeapAlloc(GetProcessHeap(), hpflags, size);
1065       return (HGLOBAL32) palloc;
1066    }
1067    else  /* HANDLE */
1068    {
1069       /* HeapLock(GetProcessHeap()); */
1070
1071       pintern=HeapAlloc(GetProcessHeap(), 0,  sizeof(GLOBAL32_INTERN));
1072       if(size)
1073       {
1074          palloc=HeapAlloc(GetProcessHeap(), hpflags, size+sizeof(HGLOBAL32));
1075          *(HGLOBAL32 *)palloc=INTERN_TO_HANDLE(pintern);
1076          pintern->Pointer=palloc+sizeof(HGLOBAL32);
1077       }
1078       else
1079          pintern->Pointer=NULL;
1080       pintern->Magic=MAGIC_GLOBAL_USED;
1081       pintern->Flags=flags>>8;
1082       pintern->LockCount=0;
1083
1084       /* HeapUnlock(GetProcessHeap()); */
1085
1086       return INTERN_TO_HANDLE(pintern);
1087    }
1088 }
1089
1090
1091 /***********************************************************************
1092  *           GlobalLock32   (KERNEL32.326)
1093  * RETURNS
1094  *      Pointer to first byte of block
1095  *      NULL: Failure
1096  */
1097 LPVOID WINAPI GlobalLock32(
1098               HGLOBAL32 hmem /* [in] Handle of global memory object */
1099 ) {
1100    PGLOBAL32_INTERN pintern;
1101    LPVOID           palloc;
1102
1103    if(ISPOINTER(hmem))
1104       return (LPVOID) hmem;
1105
1106    /* HeapLock(GetProcessHeap()); */
1107
1108    pintern=HANDLE_TO_INTERN(hmem);
1109    if(pintern->Magic==MAGIC_GLOBAL_USED)
1110    {
1111       if(pintern->LockCount<GLOBAL_LOCK_MAX)
1112          pintern->LockCount++;
1113       palloc=pintern->Pointer;
1114    }
1115    else
1116    {
1117       WARN(global, "invalid handle\n");
1118       palloc=(LPVOID) NULL;
1119    }
1120    /* HeapUnlock(GetProcessHeap()); */;
1121    return palloc;
1122 }
1123
1124
1125 /***********************************************************************
1126  *           GlobalUnlock32   (KERNEL32.332)
1127  * RETURNS
1128  *      TRUE: Object is still locked
1129  *      FALSE: Object is unlocked
1130  */
1131 BOOL32 WINAPI GlobalUnlock32(
1132               HGLOBAL32 hmem /* [in] Handle of global memory object */
1133 ) {
1134    PGLOBAL32_INTERN       pintern;
1135    BOOL32                 locked;
1136
1137    if(ISPOINTER(hmem))
1138       return FALSE;
1139
1140    /* HeapLock(GetProcessHeap()); */
1141    pintern=HANDLE_TO_INTERN(hmem);
1142
1143    if(pintern->Magic==MAGIC_GLOBAL_USED)
1144    {
1145       if((pintern->LockCount<GLOBAL_LOCK_MAX)&&(pintern->LockCount>0))
1146          pintern->LockCount--;
1147
1148       locked=(pintern->LockCount==0) ? FALSE : TRUE;
1149    }
1150    else
1151    {
1152       WARN(global, "invalid handle\n");
1153       locked=FALSE;
1154    }
1155    /* HeapUnlock(GetProcessHeap()); */
1156    return locked;
1157 }
1158
1159
1160 /***********************************************************************
1161  *           GlobalHandle32   (KERNEL32.325)
1162  * Returns the handle associated with the specified pointer.
1163  *
1164  * NOTES
1165  *      Since there in only one goto, can it be removed and the return
1166  *      be put 'inline'?
1167  *
1168  * RETURNS
1169  *      Handle: Success
1170  *      NULL: Failure
1171  */
1172 HGLOBAL32 WINAPI GlobalHandle32(
1173                  LPCVOID pmem /* [in] Pointer to global memory block */
1174 ) {
1175     HGLOBAL32 handle;
1176
1177     if (!HEAP_IsInsideHeap( GetProcessHeap(), 0, pmem )) goto error;
1178     handle = POINTER_TO_HANDLE(pmem);
1179     if (HEAP_IsInsideHeap( GetProcessHeap(), 0, (LPCVOID)handle ))
1180     {
1181         if (HANDLE_TO_INTERN(handle)->Magic == MAGIC_GLOBAL_USED)
1182             return handle;  /* valid moveable block */
1183     }
1184     /* maybe FIXED block */
1185     if (HeapValidate( GetProcessHeap(), 0, pmem ))
1186         return (HGLOBAL32)pmem;  /* valid fixed block */
1187
1188 error:
1189     SetLastError( ERROR_INVALID_HANDLE );
1190     return 0;
1191 }
1192
1193
1194 /***********************************************************************
1195  *           GlobalReAlloc32   (KERNEL32.328)
1196  * RETURNS
1197  *      Handle: Success
1198  *      NULL: Failure
1199  */
1200 HGLOBAL32 WINAPI GlobalReAlloc32(
1201                  HGLOBAL32 hmem, /* [in] Handle of global memory object */
1202                  DWORD size,     /* [in] New size of block */
1203                  UINT32 flags    /* [in] How to reallocate object */
1204 ) {
1205    LPVOID               palloc;
1206    HGLOBAL32            hnew;
1207    PGLOBAL32_INTERN     pintern;
1208
1209    hnew = 0;
1210    /* HeapLock(GetProcessHeap()); */
1211    if(flags & GMEM_MODIFY) /* modify flags */
1212    {
1213       if( ISPOINTER(hmem) && (flags & GMEM_MOVEABLE))
1214       {
1215          /* make a fixed block moveable
1216           * actually only NT is able to do this. But it's soo simple
1217           */
1218          if (hmem == 0)
1219          {
1220              ERR(global, "GlobalReAlloc32 with null handle!\n");
1221              SetLastError( ERROR_INVALID_ACCESS_TO_MEM );
1222              return 0;
1223          }
1224          size=HeapSize(GetProcessHeap(), 0, (LPVOID) hmem);
1225          hnew=GlobalAlloc32( flags, size);
1226          palloc=GlobalLock32(hnew);
1227          memcpy(palloc, (LPVOID) hmem, size);
1228          GlobalUnlock32(hnew);
1229          GlobalFree32(hmem);
1230       }
1231       else if( ISPOINTER(hmem) &&(flags & GMEM_DISCARDABLE))
1232       {
1233          /* change the flags to make our block "discardable" */
1234          pintern=HANDLE_TO_INTERN(hmem);
1235          pintern->Flags = pintern->Flags | (GMEM_DISCARDABLE >> 8);
1236          hnew=hmem;
1237       }
1238       else
1239       {
1240          SetLastError(ERROR_INVALID_PARAMETER);
1241          hnew = 0;
1242       }
1243    }
1244    else
1245    {
1246       if(ISPOINTER(hmem))
1247       {
1248          /* reallocate fixed memory */
1249          hnew=(HGLOBAL32)HeapReAlloc(GetProcessHeap(), 0, (LPVOID) hmem, size);
1250       }
1251       else
1252       {
1253          /* reallocate a moveable block */
1254          pintern=HANDLE_TO_INTERN(hmem);
1255          if(pintern->LockCount>1) {
1256             ERR(global,"handle 0x%08lx is still locked, cannot realloc!\n",(DWORD)hmem);
1257             SetLastError(ERROR_INVALID_HANDLE);
1258          } else if(size!=0)
1259          {
1260             hnew=hmem;
1261             if(pintern->Pointer)
1262             {
1263                palloc=HeapReAlloc(GetProcessHeap(), 0,
1264                                   pintern->Pointer-sizeof(HGLOBAL32),
1265                                   size+sizeof(HGLOBAL32) );
1266                pintern->Pointer=palloc+sizeof(HGLOBAL32);
1267             }
1268             else
1269             {
1270                palloc=HeapAlloc(GetProcessHeap(), 0, size+sizeof(HGLOBAL32));
1271                *(HGLOBAL32 *)palloc=hmem;
1272                pintern->Pointer=palloc+sizeof(HGLOBAL32);
1273             }
1274          }
1275          else
1276          {
1277             if(pintern->Pointer)
1278             {
1279                HeapFree(GetProcessHeap(), 0, pintern->Pointer-sizeof(HGLOBAL32));
1280                pintern->Pointer=NULL;
1281             }
1282          }
1283       }
1284    }
1285    /* HeapUnlock(GetProcessHeap()); */
1286    return hnew;
1287 }
1288
1289
1290 /***********************************************************************
1291  *           GlobalFree32   (KERNEL32.322)
1292  * RETURNS
1293  *      NULL: Success
1294  *      Handle: Failure
1295  */
1296 HGLOBAL32 WINAPI GlobalFree32(
1297                  HGLOBAL32 hmem /* [in] Handle of global memory object */
1298 ) {
1299    PGLOBAL32_INTERN pintern;
1300    HGLOBAL32        hreturned = 0;
1301
1302    if(ISPOINTER(hmem)) /* POINTER */
1303    {
1304       if(!HeapFree(GetProcessHeap(), 0, (LPVOID) hmem)) hmem = 0;
1305    }
1306    else  /* HANDLE */
1307    {
1308       /* HeapLock(GetProcessHeap()); */
1309       pintern=HANDLE_TO_INTERN(hmem);
1310
1311       if(pintern->Magic==MAGIC_GLOBAL_USED)
1312       {
1313          if(pintern->LockCount!=0)
1314             SetLastError(ERROR_INVALID_HANDLE);
1315          if(pintern->Pointer)
1316             if(!HeapFree(GetProcessHeap(), 0,
1317                          (char *)(pintern->Pointer)-sizeof(HGLOBAL32)))
1318                hreturned=hmem;
1319          if(!HeapFree(GetProcessHeap(), 0, pintern))
1320             hreturned=hmem;
1321       }
1322       /* HeapUnlock(GetProcessHeap()); */
1323    }
1324    return hreturned;
1325 }
1326
1327
1328 /***********************************************************************
1329  *           GlobalSize32   (KERNEL32.329)
1330  * RETURNS
1331  *      Size in bytes of the global memory object
1332  *      0: Failure
1333  */
1334 DWORD WINAPI GlobalSize32(
1335              HGLOBAL32 hmem /* [in] Handle of global memory object */
1336 ) {
1337    DWORD                retval;
1338    PGLOBAL32_INTERN     pintern;
1339
1340    if(ISPOINTER(hmem))
1341    {
1342       retval=HeapSize(GetProcessHeap(), 0,  (LPVOID) hmem);
1343    }
1344    else
1345    {
1346       /* HeapLock(GetProcessHeap()); */
1347       pintern=HANDLE_TO_INTERN(hmem);
1348
1349       if(pintern->Magic==MAGIC_GLOBAL_USED)
1350       {
1351          retval=HeapSize(GetProcessHeap(), 0,
1352                          (char *)(pintern->Pointer)-sizeof(HGLOBAL32))-4;
1353       }
1354       else
1355       {
1356          WARN(global, "invalid handle\n");
1357          retval=0;
1358       }
1359       /* HeapUnlock(GetProcessHeap()); */
1360    }
1361    return retval;
1362 }
1363
1364
1365 /***********************************************************************
1366  *           GlobalWire32   (KERNEL32.333)
1367  */
1368 LPVOID WINAPI GlobalWire32(HGLOBAL32 hmem)
1369 {
1370    return GlobalLock32( hmem );
1371 }
1372
1373
1374 /***********************************************************************
1375  *           GlobalUnWire32   (KERNEL32.330)
1376  */
1377 BOOL32 WINAPI GlobalUnWire32(HGLOBAL32 hmem)
1378 {
1379    return GlobalUnlock32( hmem);
1380 }
1381
1382
1383 /***********************************************************************
1384  *           GlobalFix32   (KERNEL32.320)
1385  */
1386 VOID WINAPI GlobalFix32(HGLOBAL32 hmem)
1387 {
1388     GlobalLock32( hmem );
1389 }
1390
1391
1392 /***********************************************************************
1393  *           GlobalUnfix32   (KERNEL32.331)
1394  */
1395 VOID WINAPI GlobalUnfix32(HGLOBAL32 hmem)
1396 {
1397    GlobalUnlock32( hmem);
1398 }
1399
1400
1401 /***********************************************************************
1402  *           GlobalFlags32   (KERNEL32.321)
1403  * Returns information about the specified global memory object
1404  *
1405  * NOTES
1406  *      Should this return GMEM_INVALID_HANDLE on invalid handle?
1407  *
1408  * RETURNS
1409  *      Value specifying allocation flags and lock count
1410  *      GMEM_INVALID_HANDLE: Failure
1411  */
1412 UINT32 WINAPI GlobalFlags32(
1413               HGLOBAL32 hmem /* [in] Handle to global memory object */
1414 ) {
1415    DWORD                retval;
1416    PGLOBAL32_INTERN     pintern;
1417
1418    if(ISPOINTER(hmem))
1419    {
1420       retval=0;
1421    }
1422    else
1423    {
1424       /* HeapLock(GetProcessHeap()); */
1425       pintern=HANDLE_TO_INTERN(hmem);
1426       if(pintern->Magic==MAGIC_GLOBAL_USED)
1427       {
1428          retval=pintern->LockCount + (pintern->Flags<<8);
1429          if(pintern->Pointer==0)
1430             retval|= GMEM_DISCARDED;
1431       }
1432       else
1433       {
1434          WARN(global,"Invalid handle: %04x", hmem);
1435          retval=0;
1436       }
1437       /* HeapUnlock(GetProcessHeap()); */
1438    }
1439    return retval;
1440 }
1441
1442
1443 /***********************************************************************
1444  *           GlobalCompact32   (KERNEL32.316)
1445  */
1446 DWORD WINAPI GlobalCompact32( DWORD minfree )
1447 {
1448     return 0;  /* GlobalCompact does nothing in Win32 */
1449 }
1450
1451
1452 /***********************************************************************
1453  *           GlobalMemoryStatus   (KERNEL32.327)
1454  * RETURNS
1455  *      None
1456  */
1457 VOID WINAPI GlobalMemoryStatus(
1458             LPMEMORYSTATUS lpmem
1459 ) {
1460 #ifdef linux
1461     FILE *f = fopen( "/proc/meminfo", "r" );
1462     if (f)
1463     {
1464         char buffer[256];
1465         int total, used, free;
1466
1467         lpmem->dwTotalPhys = lpmem->dwAvailPhys = 0;
1468         lpmem->dwTotalPageFile = lpmem->dwAvailPageFile = 0;
1469         while (fgets( buffer, sizeof(buffer), f ))
1470         {
1471             /* old style /proc/meminfo ... */
1472             if (sscanf( buffer, "Mem: %d %d %d", &total, &used, &free ))
1473             {
1474                 lpmem->dwTotalPhys += total;
1475                 lpmem->dwAvailPhys += free;
1476             }
1477             if (sscanf( buffer, "Swap: %d %d %d", &total, &used, &free ))
1478             {
1479                 lpmem->dwTotalPageFile += total;
1480                 lpmem->dwAvailPageFile += free;
1481             }
1482
1483             /* new style /proc/meminfo ... */
1484             if (sscanf(buffer, "MemTotal: %d", &total))
1485                 lpmem->dwTotalPhys = total*1024;
1486             if (sscanf(buffer, "MemFree: %d", &free))
1487                 lpmem->dwAvailPhys = free*1024;
1488             if (sscanf(buffer, "SwapTotal: %d", &total))
1489                 lpmem->dwTotalPageFile = total*1024;
1490             if (sscanf(buffer, "SwapFree: %d", &free))
1491                 lpmem->dwAvailPageFile = free*1024;
1492         }
1493         fclose( f );
1494
1495         if (lpmem->dwTotalPhys)
1496         {
1497             lpmem->dwTotalVirtual = lpmem->dwTotalPhys+lpmem->dwTotalPageFile;
1498             lpmem->dwAvailVirtual = lpmem->dwAvailPhys+lpmem->dwAvailPageFile;
1499             lpmem->dwMemoryLoad = (lpmem->dwTotalVirtual-lpmem->dwAvailVirtual)
1500                                       / (lpmem->dwTotalVirtual / 100);
1501             return;
1502         }
1503     }
1504 #endif
1505     /* FIXME: should do something for other systems */
1506     lpmem->dwMemoryLoad    = 0;
1507     lpmem->dwTotalPhys     = 16*1024*1024;
1508     lpmem->dwAvailPhys     = 16*1024*1024;
1509     lpmem->dwTotalPageFile = 16*1024*1024;
1510     lpmem->dwAvailPageFile = 16*1024*1024;
1511     lpmem->dwTotalVirtual  = 32*1024*1024;
1512     lpmem->dwAvailVirtual  = 32*1024*1024;
1513 }
1514
1515
1516 /**********************************************************************
1517  *           WOWGlobalAllocLock (KERNEL32.62)
1518  *
1519  * Combined GlobalAlloc and GlobalLock.
1520  */
1521 SEGPTR WINAPI WOWGlobalAllocLock16(DWORD flags,DWORD cb,HGLOBAL16 *hmem)
1522 {
1523     HGLOBAL16 xhmem;
1524     xhmem = GlobalAlloc16(flags,cb);
1525     if (hmem) *hmem = xhmem;
1526     return WIN16_GlobalLock16(xhmem);
1527 }
1528
1529
1530 /**********************************************************************
1531  *           WOWGlobalUnlockFree (KERNEL32.64)
1532  *
1533  * Combined GlobalUnlock and GlobalFree.
1534  */
1535 WORD WINAPI WOWGlobalUnlockFree16(DWORD vpmem) {
1536     if (!GlobalUnlock16(HIWORD(vpmem)))
1537         return 0;
1538     return GlobalFree16(HIWORD(vpmem));
1539 }