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 WORD 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 0;
 817     }
 818     GET_ARENA_PTR(handle)->lockCount++;
 819
 820     return GlobalHandleToSel(handle);
 821 }
 822
 823
 824 /***********************************************************************
 825  *           GlobalUnfix16   (KERNEL.198)
 826  */
 827 void WINAPI GlobalUnfix16( HGLOBAL16 handle )
 828 {
 829     TRACE(global, "%04x\n", handle );
 830     if (!VALID_HANDLE(handle)) {
 831         WARN(global,"Invalid handle 0x%04x passed to GlobalUnfix16!\n",handle);
 832         return;
 833     }
 834     GET_ARENA_PTR(handle)->lockCount--;
 835 }
 836
 837
 838 /***********************************************************************
 839  *           FarSetOwner   (KERNEL.403)
 840  */
 841 void WINAPI FarSetOwner( HGLOBAL16 handle, HANDLE16 hOwner )
 842 {
 843     if (!VALID_HANDLE(handle)) {
 844         WARN(global,"Invalid handle 0x%04x passed to FarSetOwner!\n",handle);
 845         return;
 846     }
 847     GET_ARENA_PTR(handle)->hOwner = hOwner;
 848 }
 849
 850
 851 /***********************************************************************
 852  *           FarGetOwner   (KERNEL.404)
 853  */
 854 HANDLE16 WINAPI FarGetOwner( HGLOBAL16 handle )
 855 {
 856     if (!VALID_HANDLE(handle)) {
 857         WARN(global,"Invalid handle 0x%04x passed to FarGetOwner!\n",handle);
 858         return 0;
 859     }
 860     return GET_ARENA_PTR(handle)->hOwner;
 861 }
 862
 863
 864 /***********************************************************************
 865  *           GlobalHandleToSel   (TOOLHELP.50)
 866  */
 867 WORD WINAPI GlobalHandleToSel( HGLOBAL16 handle )
 868 {
 869     TRACE(toolhelp, "%04x\n", handle );
 870     if (!handle) return 0;
 871 #ifdef CONFIG_IPC
 872     if (is_dde_handle(handle)) return DDE_GlobalHandleToSel(handle);
 873 #endif
 874     if (!VALID_HANDLE(handle)) {
 875         WARN(global,"Invalid handle 0x%04x passed to GlobalHandleToSel!\n",handle);
 876         return 0;
 877     }
 878     if (!(handle & 7))
 879     {
 880         WARN(global, "Program attempted invalid selector conversion\n" );
 881         return handle - 1;
 882     }
 883     return handle | 7;
 884 }
 885
 886
 887 /***********************************************************************
 888  *           GlobalFirst   (TOOLHELP.51)
 889  */
 890 BOOL16 WINAPI GlobalFirst( GLOBALENTRY *pGlobal, WORD wFlags )
 891 {
 892     if (wFlags == GLOBAL_LRU) return FALSE;
 893     pGlobal->dwNext = 0;
 894     return GlobalNext( pGlobal, wFlags );
 895 }
 896
 897
 898 /***********************************************************************
 899  *           GlobalNext   (TOOLHELP.52)
 900  */
 901 BOOL16 WINAPI GlobalNext( GLOBALENTRY *pGlobal, WORD wFlags)
 902 {
 903     GLOBALARENA *pArena;
 904
 905     if (pGlobal->dwNext >= globalArenaSize) return FALSE;
 906     pArena = pGlobalArena + pGlobal->dwNext;
 907     if (wFlags == GLOBAL_FREE)  /* only free blocks */
 908     {
 909         int i;
 910         for (i = pGlobal->dwNext; i < globalArenaSize; i++, pArena++)
 911             if (pArena->size == 0) break;  /* block is free */
 912         if (i >= globalArenaSize) return FALSE;
 913         pGlobal->dwNext = i;
 914     }
 915
 916     pGlobal->dwAddress    = pArena->base;
 917     pGlobal->dwBlockSize  = pArena->size;
 918     pGlobal->hBlock       = pArena->handle;
 919     pGlobal->wcLock       = pArena->lockCount;
 920     pGlobal->wcPageLock   = pArena->pageLockCount;
 921     pGlobal->wFlags       = (GetCurrentPDB() == pArena->hOwner);
 922     pGlobal->wHeapPresent = FALSE;
 923     pGlobal->hOwner       = pArena->hOwner;
 924     pGlobal->wType        = GT_UNKNOWN;
 925     pGlobal->wData        = 0;
 926     pGlobal->dwNext++;
 927     return TRUE;
 928 }
 929
 930
 931 /***********************************************************************
 932  *           GlobalInfo   (TOOLHELP.53)
 933  */
 934 BOOL16 WINAPI GlobalInfo( GLOBALINFO *pInfo )
 935 {
 936     int i;
 937     GLOBALARENA *pArena;
 938
 939     pInfo->wcItems = globalArenaSize;
 940     pInfo->wcItemsFree = 0;
 941     pInfo->wcItemsLRU = 0;
 942     for (i = 0, pArena = pGlobalArena; i < globalArenaSize; i++, pArena++)
 943         if (pArena->size == 0) pInfo->wcItemsFree++;
 944     return TRUE;
 945 }
 946
 947
 948 /***********************************************************************
 949  *           GlobalEntryHandle   (TOOLHELP.54)
 950  */
 951 BOOL16 WINAPI GlobalEntryHandle( GLOBALENTRY *pGlobal, HGLOBAL16 hItem )
 952 {
 953     GLOBALARENA *pArena = GET_ARENA_PTR(hItem);
 954
 955     pGlobal->dwAddress    = pArena->base;
 956     pGlobal->dwBlockSize  = pArena->size;
 957     pGlobal->hBlock       = pArena->handle;
 958     pGlobal->wcLock       = pArena->lockCount;
 959     pGlobal->wcPageLock   = pArena->pageLockCount;
 960     pGlobal->wFlags       = (GetCurrentPDB() == pArena->hOwner);
 961     pGlobal->wHeapPresent = FALSE;
 962     pGlobal->hOwner       = pArena->hOwner;
 963     pGlobal->wType        = GT_UNKNOWN;
 964     pGlobal->wData        = 0;
 965     pGlobal->dwNext++;
 966     return TRUE;
 967 }
 968
 969
 970 /***********************************************************************
 971  *           GlobalEntryModule   (TOOLHELP.55)
 972  */
 973 BOOL16 WINAPI GlobalEntryModule( GLOBALENTRY *pGlobal, HMODULE16 hModule,
 974                                  WORD wSeg )
 975 {
 976     return FALSE;
 977 }
 978
 979
 980 /***********************************************************************
 981  *           MemManInfo   (TOOLHELP.72)
 982  */
 983 BOOL16 WINAPI MemManInfo( MEMMANINFO *info )
 984 {
 985     MEMORYSTATUS status;
 986
 987     /*
 988      * Not unsurprisingly although the documention says you
 989      * _must_ provide the size in the dwSize field, this function
 990      * (under Windows) always fills the structure and returns true.
 991      */
 992     GlobalMemoryStatus( &status );
 993     info->wPageSize            = VIRTUAL_GetPageSize();
 994     info->dwLargestFreeBlock   = status.dwAvailVirtual;
 995     info->dwMaxPagesAvailable  = info->dwLargestFreeBlock / info->wPageSize;
 996     info->dwMaxPagesLockable   = info->dwMaxPagesAvailable;
 997     info->dwTotalLinearSpace   = status.dwTotalVirtual / info->wPageSize;
 998     info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
 999     info->dwFreePages          = info->dwMaxPagesAvailable;
1000     info->dwTotalPages         = info->dwTotalLinearSpace;
1001     info->dwFreeLinearSpace    = info->dwMaxPagesAvailable;
1002     info->dwSwapFilePages      = status.dwTotalPageFile / info->wPageSize;
1003     return TRUE;
1004 }
1005
1006 /***********************************************************************
1007  *           GetFreeMemInfo   (KERNEL.316)
1008  */
1009 DWORD WINAPI GetFreeMemInfo(void)
1010 {
1011     MEMMANINFO info;
1012     MemManInfo( &info );
1013     return MAKELONG( info.dwTotalLinearSpace, info.dwMaxPagesAvailable );
1014 }
1015
1016 /*
1017  * Win32 Global heap functions (GlobalXXX).
1018  * These functions included in Win32 for compatibility with 16 bit Windows
1019  * Especially the moveable blocks and handles are oldish.
1020  * But the ability to directly allocate memory with GPTR and LPTR is widely
1021  * used.
1022  *
1023  * The handle stuff looks horrible, but it's implemented almost like Win95
1024  * does it.
1025  *
1026  */
1027
1028 #define MAGIC_GLOBAL_USED 0x5342
1029 #define GLOBAL_LOCK_MAX   0xFF
1030 #define HANDLE_TO_INTERN(h)  ((PGLOBAL32_INTERN)(((char *)(h))-2))
1031 #define INTERN_TO_HANDLE(i)  ((HGLOBAL32) &((i)->Pointer))
1032 #define POINTER_TO_HANDLE(p) (*(((HGLOBAL32 *)(p))-1))
1033 #define ISHANDLE(h)          (((DWORD)(h)&2)!=0)
1034 #define ISPOINTER(h)         (((DWORD)(h)&2)==0)
1035
1036 typedef struct __GLOBAL32_INTERN
1037 {
1038    WORD         Magic;
1039    LPVOID       Pointer WINE_PACKED;
1040    BYTE         Flags;
1041    BYTE         LockCount;
1042 } GLOBAL32_INTERN, *PGLOBAL32_INTERN;
1043
1044
1045 /***********************************************************************
1046  *           GlobalAlloc32   (KERNEL32.315)
1047  * RETURNS
1048  *      Handle: Success
1049  *      NULL: Failure
1050  */
1051 HGLOBAL32 WINAPI GlobalAlloc32(
1052                  UINT32 flags, /* [in] Object allocation attributes */
1053                  DWORD size    /* [in] Number of bytes to allocate */
1054 ) {
1055    PGLOBAL32_INTERN     pintern;
1056    DWORD                hpflags;
1057    LPVOID               palloc;
1058
1059    if(flags&GMEM_ZEROINIT)
1060       hpflags=HEAP_ZERO_MEMORY;
1061    else
1062       hpflags=0;
1063
1064    if((flags & GMEM_MOVEABLE)==0) /* POINTER */
1065    {
1066       palloc=HeapAlloc(GetProcessHeap(), hpflags, size);
1067       return (HGLOBAL32) palloc;
1068    }
1069    else  /* HANDLE */
1070    {
1071       /* HeapLock(GetProcessHeap()); */
1072
1073       pintern=HeapAlloc(GetProcessHeap(), 0,  sizeof(GLOBAL32_INTERN));
1074       if(size)
1075       {
1076          palloc=HeapAlloc(GetProcessHeap(), hpflags, size+sizeof(HGLOBAL32));
1077          *(HGLOBAL32 *)palloc=INTERN_TO_HANDLE(pintern);
1078          pintern->Pointer=palloc+sizeof(HGLOBAL32);
1079       }
1080       else
1081          pintern->Pointer=NULL;
1082       pintern->Magic=MAGIC_GLOBAL_USED;
1083       pintern->Flags=flags>>8;
1084       pintern->LockCount=0;
1085
1086       /* HeapUnlock(GetProcessHeap()); */
1087
1088       return INTERN_TO_HANDLE(pintern);
1089    }
1090 }
1091
1092
1093 /***********************************************************************
1094  *           GlobalLock32   (KERNEL32.326)
1095  * RETURNS
1096  *      Pointer to first byte of block
1097  *      NULL: Failure
1098  */
1099 LPVOID WINAPI GlobalLock32(
1100               HGLOBAL32 hmem /* [in] Handle of global memory object */
1101 ) {
1102    PGLOBAL32_INTERN pintern;
1103    LPVOID           palloc;
1104
1105    if(ISPOINTER(hmem))
1106       return (LPVOID) hmem;
1107
1108    /* HeapLock(GetProcessHeap()); */
1109
1110    pintern=HANDLE_TO_INTERN(hmem);
1111    if(pintern->Magic==MAGIC_GLOBAL_USED)
1112    {
1113       if(pintern->LockCount<GLOBAL_LOCK_MAX)
1114          pintern->LockCount++;
1115       palloc=pintern->Pointer;
1116    }
1117    else
1118    {
1119       WARN(global, "invalid handle\n");
1120       palloc=(LPVOID) NULL;
1121    }
1122    /* HeapUnlock(GetProcessHeap()); */;
1123    return palloc;
1124 }
1125
1126
1127 /***********************************************************************
1128  *           GlobalUnlock32   (KERNEL32.332)
1129  * RETURNS
1130  *      TRUE: Object is still locked
1131  *      FALSE: Object is unlocked
1132  */
1133 BOOL32 WINAPI GlobalUnlock32(
1134               HGLOBAL32 hmem /* [in] Handle of global memory object */
1135 ) {
1136    PGLOBAL32_INTERN       pintern;
1137    BOOL32                 locked;
1138
1139    if(ISPOINTER(hmem))
1140       return FALSE;
1141
1142    /* HeapLock(GetProcessHeap()); */
1143    pintern=HANDLE_TO_INTERN(hmem);
1144
1145    if(pintern->Magic==MAGIC_GLOBAL_USED)
1146    {
1147       if((pintern->LockCount<GLOBAL_LOCK_MAX)&&(pintern->LockCount>0))
1148          pintern->LockCount--;
1149
1150       locked=(pintern->LockCount==0) ? FALSE : TRUE;
1151    }
1152    else
1153    {
1154       WARN(global, "invalid handle\n");
1155       locked=FALSE;
1156    }
1157    /* HeapUnlock(GetProcessHeap()); */
1158    return locked;
1159 }
1160
1161
1162 /***********************************************************************
1163  *           GlobalHandle32   (KERNEL32.325)
1164  * Returns the handle associated with the specified pointer.
1165  *
1166  * NOTES
1167  *      Since there in only one goto, can it be removed and the return
1168  *      be put 'inline'?
1169  *
1170  * RETURNS
1171  *      Handle: Success
1172  *      NULL: Failure
1173  */
1174 HGLOBAL32 WINAPI GlobalHandle32(
1175                  LPCVOID pmem /* [in] Pointer to global memory block */
1176 ) {
1177     HGLOBAL32 handle;
1178
1179     if (!HEAP_IsInsideHeap( GetProcessHeap(), 0, pmem )) goto error;
1180     handle = POINTER_TO_HANDLE(pmem);
1181     if (HEAP_IsInsideHeap( GetProcessHeap(), 0, (LPCVOID)handle ))
1182     {
1183         if (HANDLE_TO_INTERN(handle)->Magic == MAGIC_GLOBAL_USED)
1184             return handle;  /* valid moveable block */
1185     }
1186     /* maybe FIXED block */
1187     if (HeapValidate( GetProcessHeap(), 0, pmem ))
1188         return (HGLOBAL32)pmem;  /* valid fixed block */
1189
1190 error:
1191     SetLastError( ERROR_INVALID_HANDLE );
1192     return 0;
1193 }
1194
1195
1196 /***********************************************************************
1197  *           GlobalReAlloc32   (KERNEL32.328)
1198  * RETURNS
1199  *      Handle: Success
1200  *      NULL: Failure
1201  */
1202 HGLOBAL32 WINAPI GlobalReAlloc32(
1203                  HGLOBAL32 hmem, /* [in] Handle of global memory object */
1204                  DWORD size,     /* [in] New size of block */
1205                  UINT32 flags    /* [in] How to reallocate object */
1206 ) {
1207    LPVOID               palloc;
1208    HGLOBAL32            hnew;
1209    PGLOBAL32_INTERN     pintern;
1210
1211    hnew = 0;
1212    /* HeapLock(GetProcessHeap()); */
1213    if(flags & GMEM_MODIFY) /* modify flags */
1214    {
1215       if( ISPOINTER(hmem) && (flags & GMEM_MOVEABLE))
1216       {
1217          /* make a fixed block moveable
1218           * actually only NT is able to do this. But it's soo simple
1219           */
1220          if (hmem == 0)
1221          {
1222              ERR(global, "GlobalReAlloc32 with null handle!\n");
1223              SetLastError( ERROR_INVALID_ACCESS_TO_MEM );
1224              return 0;
1225          }
1226          size=HeapSize(GetProcessHeap(), 0, (LPVOID) hmem);
1227          hnew=GlobalAlloc32( flags, size);
1228          palloc=GlobalLock32(hnew);
1229          memcpy(palloc, (LPVOID) hmem, size);
1230          GlobalUnlock32(hnew);
1231          GlobalFree32(hmem);
1232       }
1233       else if( ISPOINTER(hmem) &&(flags & GMEM_DISCARDABLE))
1234       {
1235          /* change the flags to make our block "discardable" */
1236          pintern=HANDLE_TO_INTERN(hmem);
1237          pintern->Flags = pintern->Flags | (GMEM_DISCARDABLE >> 8);
1238          hnew=hmem;
1239       }
1240       else
1241       {
1242          SetLastError(ERROR_INVALID_PARAMETER);
1243          hnew = 0;
1244       }
1245    }
1246    else
1247    {
1248       if(ISPOINTER(hmem))
1249       {
1250          /* reallocate fixed memory */
1251          hnew=(HGLOBAL32)HeapReAlloc(GetProcessHeap(), 0, (LPVOID) hmem, size);
1252       }
1253       else
1254       {
1255          /* reallocate a moveable block */
1256          pintern=HANDLE_TO_INTERN(hmem);
1257          if(pintern->LockCount>1) {
1258             ERR(global,"handle 0x%08lx is still locked, cannot realloc!\n",(DWORD)hmem);
1259             SetLastError(ERROR_INVALID_HANDLE);
1260          } else if(size!=0)
1261          {
1262             hnew=hmem;
1263             if(pintern->Pointer)
1264             {
1265                palloc=HeapReAlloc(GetProcessHeap(), 0,
1266                                   pintern->Pointer-sizeof(HGLOBAL32),
1267                                   size+sizeof(HGLOBAL32) );
1268                pintern->Pointer=palloc+sizeof(HGLOBAL32);
1269             }
1270             else
1271             {
1272                palloc=HeapAlloc(GetProcessHeap(), 0, size+sizeof(HGLOBAL32));
1273                *(HGLOBAL32 *)palloc=hmem;
1274                pintern->Pointer=palloc+sizeof(HGLOBAL32);
1275             }
1276          }
1277          else
1278          {
1279             if(pintern->Pointer)
1280             {
1281                HeapFree(GetProcessHeap(), 0, pintern->Pointer-sizeof(HGLOBAL32));
1282                pintern->Pointer=NULL;
1283             }
1284          }
1285       }
1286    }
1287    /* HeapUnlock(GetProcessHeap()); */
1288    return hnew;
1289 }
1290
1291
1292 /***********************************************************************
1293  *           GlobalFree32   (KERNEL32.322)
1294  * RETURNS
1295  *      NULL: Success
1296  *      Handle: Failure
1297  */
1298 HGLOBAL32 WINAPI GlobalFree32(
1299                  HGLOBAL32 hmem /* [in] Handle of global memory object */
1300 ) {
1301    PGLOBAL32_INTERN pintern;
1302    HGLOBAL32        hreturned = 0;
1303
1304    if(ISPOINTER(hmem)) /* POINTER */
1305    {
1306       if(!HeapFree(GetProcessHeap(), 0, (LPVOID) hmem)) hmem = 0;
1307    }
1308    else  /* HANDLE */
1309    {
1310       /* HeapLock(GetProcessHeap()); */
1311       pintern=HANDLE_TO_INTERN(hmem);
1312
1313       if(pintern->Magic==MAGIC_GLOBAL_USED)
1314       {
1315          if(pintern->LockCount!=0)
1316             SetLastError(ERROR_INVALID_HANDLE);
1317          if(pintern->Pointer)
1318             if(!HeapFree(GetProcessHeap(), 0,
1319                          (char *)(pintern->Pointer)-sizeof(HGLOBAL32)))
1320                hreturned=hmem;
1321          if(!HeapFree(GetProcessHeap(), 0, pintern))
1322             hreturned=hmem;
1323       }
1324       /* HeapUnlock(GetProcessHeap()); */
1325    }
1326    return hreturned;
1327 }
1328
1329
1330 /***********************************************************************
1331  *           GlobalSize32   (KERNEL32.329)
1332  * RETURNS
1333  *      Size in bytes of the global memory object
1334  *      0: Failure
1335  */
1336 DWORD WINAPI GlobalSize32(
1337              HGLOBAL32 hmem /* [in] Handle of global memory object */
1338 ) {
1339    DWORD                retval;
1340    PGLOBAL32_INTERN     pintern;
1341
1342    if(ISPOINTER(hmem))
1343    {
1344       retval=HeapSize(GetProcessHeap(), 0,  (LPVOID) hmem);
1345    }
1346    else
1347    {
1348       /* HeapLock(GetProcessHeap()); */
1349       pintern=HANDLE_TO_INTERN(hmem);
1350
1351       if(pintern->Magic==MAGIC_GLOBAL_USED)
1352       {
1353          retval=HeapSize(GetProcessHeap(), 0,
1354                          (char *)(pintern->Pointer)-sizeof(HGLOBAL32))-4;
1355       }
1356       else
1357       {
1358          WARN(global, "invalid handle\n");
1359          retval=0;
1360       }
1361       /* HeapUnlock(GetProcessHeap()); */
1362    }
1363    return retval;
1364 }
1365
1366
1367 /***********************************************************************
1368  *           GlobalWire32   (KERNEL32.333)
1369  */
1370 LPVOID WINAPI GlobalWire32(HGLOBAL32 hmem)
1371 {
1372    return GlobalLock32( hmem );
1373 }
1374
1375
1376 /***********************************************************************
1377  *           GlobalUnWire32   (KERNEL32.330)
1378  */
1379 BOOL32 WINAPI GlobalUnWire32(HGLOBAL32 hmem)
1380 {
1381    return GlobalUnlock32( hmem);
1382 }
1383
1384
1385 /***********************************************************************
1386  *           GlobalFix32   (KERNEL32.320)
1387  */
1388 VOID WINAPI GlobalFix32(HGLOBAL32 hmem)
1389 {
1390     GlobalLock32( hmem );
1391 }
1392
1393
1394 /***********************************************************************
1395  *           GlobalUnfix32   (KERNEL32.331)
1396  */
1397 VOID WINAPI GlobalUnfix32(HGLOBAL32 hmem)
1398 {
1399    GlobalUnlock32( hmem);
1400 }
1401
1402
1403 /***********************************************************************
1404  *           GlobalFlags32   (KERNEL32.321)
1405  * Returns information about the specified global memory object
1406  *
1407  * NOTES
1408  *      Should this return GMEM_INVALID_HANDLE on invalid handle?
1409  *
1410  * RETURNS
1411  *      Value specifying allocation flags and lock count
1412  *      GMEM_INVALID_HANDLE: Failure
1413  */
1414 UINT32 WINAPI GlobalFlags32(
1415               HGLOBAL32 hmem /* [in] Handle to global memory object */
1416 ) {
1417    DWORD                retval;
1418    PGLOBAL32_INTERN     pintern;
1419
1420    if(ISPOINTER(hmem))
1421    {
1422       retval=0;
1423    }
1424    else
1425    {
1426       /* HeapLock(GetProcessHeap()); */
1427       pintern=HANDLE_TO_INTERN(hmem);
1428       if(pintern->Magic==MAGIC_GLOBAL_USED)
1429       {
1430          retval=pintern->LockCount + (pintern->Flags<<8);
1431          if(pintern->Pointer==0)
1432             retval|= GMEM_DISCARDED;
1433       }
1434       else
1435       {
1436          WARN(global,"Invalid handle: %04x", hmem);
1437          retval=0;
1438       }
1439       /* HeapUnlock(GetProcessHeap()); */
1440    }
1441    return retval;
1442 }
1443
1444
1445 /***********************************************************************
1446  *           GlobalCompact32   (KERNEL32.316)
1447  */
1448 DWORD WINAPI GlobalCompact32( DWORD minfree )
1449 {
1450     return 0;  /* GlobalCompact does nothing in Win32 */
1451 }
1452
1453
1454 /***********************************************************************
1455  *           GlobalMemoryStatus   (KERNEL32.327)
1456  * RETURNS
1457  *      None
1458  */
1459 VOID WINAPI GlobalMemoryStatus(
1460             LPMEMORYSTATUS lpmem
1461 ) {
1462 #ifdef linux
1463     FILE *f = fopen( "/proc/meminfo", "r" );
1464     if (f)
1465     {
1466         char buffer[256];
1467         int total, used, free;
1468
1469         lpmem->dwTotalPhys = lpmem->dwAvailPhys = 0;
1470         lpmem->dwTotalPageFile = lpmem->dwAvailPageFile = 0;
1471         while (fgets( buffer, sizeof(buffer), f ))
1472         {
1473             /* old style /proc/meminfo ... */
1474             if (sscanf( buffer, "Mem: %d %d %d", &total, &used, &free ))
1475             {
1476                 lpmem->dwTotalPhys += total;
1477                 lpmem->dwAvailPhys += free;
1478             }
1479             if (sscanf( buffer, "Swap: %d %d %d", &total, &used, &free ))
1480             {
1481                 lpmem->dwTotalPageFile += total;
1482                 lpmem->dwAvailPageFile += free;
1483             }
1484
1485             /* new style /proc/meminfo ... */
1486             if (sscanf(buffer, "MemTotal: %d", &total))
1487                 lpmem->dwTotalPhys = total*1024;
1488             if (sscanf(buffer, "MemFree: %d", &free))
1489                 lpmem->dwAvailPhys = free*1024;
1490             if (sscanf(buffer, "SwapTotal: %d", &total))
1491                 lpmem->dwTotalPageFile = total*1024;
1492             if (sscanf(buffer, "SwapFree: %d", &free))
1493                 lpmem->dwAvailPageFile = free*1024;
1494         }
1495         fclose( f );
1496
1497         if (lpmem->dwTotalPhys)
1498         {
1499             lpmem->dwTotalVirtual = lpmem->dwTotalPhys+lpmem->dwTotalPageFile;
1500             lpmem->dwAvailVirtual = lpmem->dwAvailPhys+lpmem->dwAvailPageFile;
1501             lpmem->dwMemoryLoad = (lpmem->dwTotalVirtual-lpmem->dwAvailVirtual)
1502                                       / (lpmem->dwTotalVirtual / 100);
1503             return;
1504         }
1505     }
1506 #endif
1507     /* FIXME: should do something for other systems */
1508     lpmem->dwMemoryLoad    = 0;
1509     lpmem->dwTotalPhys     = 16*1024*1024;
1510     lpmem->dwAvailPhys     = 16*1024*1024;
1511     lpmem->dwTotalPageFile = 16*1024*1024;
1512     lpmem->dwAvailPageFile = 16*1024*1024;
1513     lpmem->dwTotalVirtual  = 32*1024*1024;
1514     lpmem->dwAvailVirtual  = 32*1024*1024;
1515 }
1516
1517
1518 /**********************************************************************
1519  *           WOWGlobalAllocLock (KERNEL32.62)
1520  *
1521  * Combined GlobalAlloc and GlobalLock.
1522  */
1523 SEGPTR WINAPI WOWGlobalAllocLock16(DWORD flags,DWORD cb,HGLOBAL16 *hmem)
1524 {
1525     HGLOBAL16 xhmem;
1526     xhmem = GlobalAlloc16(flags,cb);
1527     if (hmem) *hmem = xhmem;
1528     return WIN16_GlobalLock16(xhmem);
1529 }
1530
1531
1532 /**********************************************************************
1533  *           WOWGlobalUnlockFree (KERNEL32.64)
1534  *
1535  * Combined GlobalUnlock and GlobalFree.
1536  */
1537 WORD WINAPI WOWGlobalUnlockFree16(DWORD vpmem) {
1538     if (!GlobalUnlock16(HIWORD(vpmem)))
1539         return 0;
1540     return GlobalFree16(HIWORD(vpmem));
1541 }