4 * Copyright 1996 Alexandre Julliard
5 * Copyright 1998 Ulrich Weigand
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #include "wine/winbase16.h"
34 #include "wine/unicode.h"
35 #include "selectors.h"
39 #include "wine/debug.h"
41 WINE_DEFAULT_DEBUG_CHANNEL(heap);
43 /* address where we try to map the system heap */
44 #define SYSTEM_HEAP_BASE ((void*)0x65430000)
45 #define SYSTEM_HEAP_SIZE 0x100000 /* Default heap size = 1Mb */
48 #define HTABLE_SIZE 0x10000
49 #define HTABLE_PAGESIZE 0x1000
50 #define HTABLE_NPAGES (HTABLE_SIZE / HTABLE_PAGESIZE)
53 typedef struct _LOCAL32HEADER
55 WORD freeListFirst[HTABLE_NPAGES];
56 WORD freeListSize[HTABLE_NPAGES];
57 WORD freeListLast[HTABLE_NPAGES];
59 DWORD selectorTableOffset;
60 WORD selectorTableSize;
75 #define LOCAL32_MAGIC ((DWORD)('L' | ('H'<<8) | ('3'<<16) | ('2'<<24)))
77 static HANDLE systemHeap; /* globally shared heap */
79 /***********************************************************************
80 * HEAP_CreateSystemHeap
82 * Create the system heap.
84 inline static HANDLE HEAP_CreateSystemHeap(void)
89 UNICODE_STRING event_name;
90 OBJECT_ATTRIBUTES event_attr;
92 if (!(map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE,
93 0, SYSTEM_HEAP_SIZE, "__SystemHeap" ))) return 0;
94 created = (GetLastError() != ERROR_ALREADY_EXISTS);
96 if (!(base = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, SYSTEM_HEAP_BASE )))
98 /* pre-defined address not available */
99 ERR( "system heap base address %p not available\n", SYSTEM_HEAP_BASE );
103 /* create the system heap event */
104 RtlCreateUnicodeStringFromAsciiz( &event_name, "__SystemHeapEvent" );
105 event_attr.Length = sizeof(event_attr);
106 event_attr.RootDirectory = 0;
107 event_attr.ObjectName = &event_name;
108 event_attr.Attributes = 0;
109 event_attr.SecurityDescriptor = NULL;
110 event_attr.SecurityQualityOfService = NULL;
111 NtCreateEvent( &event, EVENT_ALL_ACCESS, &event_attr, TRUE, FALSE );
113 if (created) /* newly created heap */
115 systemHeap = RtlCreateHeap( HEAP_SHARED, base, SYSTEM_HEAP_SIZE,
116 SYSTEM_HEAP_SIZE, NULL, NULL );
117 NtSetEvent( event, NULL );
121 /* wait for the heap to be initialized */
122 WaitForSingleObject( event, INFINITE );
123 systemHeap = (HANDLE)base;
130 /***********************************************************************
131 * HeapCreate (KERNEL32.@)
133 * Handle of heap: Success
136 HANDLE WINAPI HeapCreate(
137 DWORD flags, /* [in] Heap allocation flag */
138 SIZE_T initialSize, /* [in] Initial heap size */
139 SIZE_T maxSize /* [in] Maximum heap size */
143 if ( flags & HEAP_SHARED )
145 if (!systemHeap) HEAP_CreateSystemHeap();
146 else WARN( "Shared Heap requested, returning system heap.\n" );
151 ret = RtlCreateHeap( flags, NULL, maxSize, initialSize, NULL, NULL );
152 if (!ret) SetLastError( ERROR_NOT_ENOUGH_MEMORY );
157 /***********************************************************************
158 * HeapDestroy (KERNEL32.@)
163 BOOL WINAPI HeapDestroy( HANDLE heap /* [in] Handle of heap */ )
165 if (heap == systemHeap)
167 WARN( "attempt to destroy system heap, returning TRUE!\n" );
170 if (!RtlDestroyHeap( heap )) return TRUE;
171 SetLastError( ERROR_INVALID_HANDLE );
176 /***********************************************************************
177 * HeapCompact (KERNEL32.@)
179 SIZE_T WINAPI HeapCompact( HANDLE heap, DWORD flags )
181 return RtlCompactHeap( heap, flags );
185 /***********************************************************************
186 * HeapLock (KERNEL32.@)
187 * Attempts to acquire the critical section object for a specified heap.
193 BOOL WINAPI HeapLock(
194 HANDLE heap /* [in] Handle of heap to lock for exclusive access */
196 return RtlLockHeap( heap );
200 /***********************************************************************
201 * HeapUnlock (KERNEL32.@)
202 * Releases ownership of the critical section object.
208 BOOL WINAPI HeapUnlock(
209 HANDLE heap /* [in] Handle to the heap to unlock */
211 return RtlUnlockHeap( heap );
215 /***********************************************************************
216 * HeapValidate (KERNEL32.@)
217 * Validates a specified heap.
226 BOOL WINAPI HeapValidate(
227 HANDLE heap, /* [in] Handle to the heap */
228 DWORD flags, /* [in] Bit flags that control access during operation */
229 LPCVOID block /* [in] Optional pointer to memory block to validate */
231 return RtlValidateHeap( heap, flags, block );
235 /***********************************************************************
236 * HeapWalk (KERNEL32.@)
237 * Enumerates the memory blocks in a specified heap.
240 * - handling of PROCESS_HEAP_ENTRY_MOVEABLE and
241 * PROCESS_HEAP_ENTRY_DDESHARE (needs heap.c support)
247 BOOL WINAPI HeapWalk(
248 HANDLE heap, /* [in] Handle to heap to enumerate */
249 LPPROCESS_HEAP_ENTRY entry /* [out] Pointer to structure of enumeration info */
251 NTSTATUS ret = RtlWalkHeap( heap, entry );
252 if (ret) SetLastError( RtlNtStatusToDosError(ret) );
257 /***********************************************************************
258 * GetProcessHeap (KERNEL32.@)
260 HANDLE WINAPI GetProcessHeap(void)
262 HANDLE *pdb = (HANDLE *)NtCurrentTeb()->process;
263 return pdb[0x18 / sizeof(HANDLE)]; /* get dword at offset 0x18 in pdb */
267 /***********************************************************************
268 * GetProcessHeaps (KERNEL32.@)
270 DWORD WINAPI GetProcessHeaps( DWORD count, HANDLE *heaps )
272 return RtlGetProcessHeaps( count, heaps );
276 /***********************************************************************
277 * 32-bit local heap functions (Win95; undocumented)
280 /***********************************************************************
283 HANDLE WINAPI Local32Init16( WORD segment, DWORD tableSize,
284 DWORD heapSize, DWORD flags )
286 DWORD totSize, segSize = 0;
288 LOCAL32HEADER *header;
291 WORD selectorEven, selectorOdd;
294 /* Determine new heap size */
298 if ( (segSize = GetSelectorLimit16( segment )) == 0 )
304 if ( heapSize == -1L )
305 heapSize = 1024L*1024L; /* FIXME */
307 heapSize = (heapSize + 0xffff) & 0xffff0000;
308 segSize = (segSize + 0x0fff) & 0xfffff000;
309 totSize = segSize + HTABLE_SIZE + heapSize;
312 /* Allocate memory and initialize heap */
314 if ( !(base = VirtualAlloc( NULL, totSize, MEM_RESERVE, PAGE_READWRITE )) )
317 if ( !VirtualAlloc( base, segSize + HTABLE_PAGESIZE,
318 MEM_COMMIT, PAGE_READWRITE ) )
320 VirtualFree( base, 0, MEM_RELEASE );
324 if (!(heap = RtlCreateHeap( 0, base + segSize + HTABLE_SIZE, heapSize, 0x10000, NULL, NULL )))
326 VirtualFree( base, 0, MEM_RELEASE );
331 /* Set up header and handle table */
333 header = (LOCAL32HEADER *)(base + segSize);
335 header->limit = HTABLE_PAGESIZE-1;
337 header->magic = LOCAL32_MAGIC;
340 header->freeListFirst[0] = sizeof(LOCAL32HEADER);
341 header->freeListLast[0] = HTABLE_PAGESIZE - 4;
342 header->freeListSize[0] = (HTABLE_PAGESIZE - sizeof(LOCAL32HEADER)) / 4;
344 for (i = header->freeListFirst[0]; i < header->freeListLast[0]; i += 4)
345 *(DWORD *)((LPBYTE)header + i) = i+4;
347 header->freeListFirst[1] = 0xffff;
350 /* Set up selector table */
352 nrBlocks = (totSize + 0x7fff) >> 15;
353 selectorTable = (LPWORD) HeapAlloc( header->heap, 0, nrBlocks * 2 );
354 selectorEven = SELECTOR_AllocBlock( base, totSize, WINE_LDT_FLAGS_DATA );
355 selectorOdd = SELECTOR_AllocBlock( base + 0x8000, totSize - 0x8000, WINE_LDT_FLAGS_DATA );
356 if ( !selectorTable || !selectorEven || !selectorOdd )
358 if ( selectorTable ) HeapFree( header->heap, 0, selectorTable );
359 if ( selectorEven ) SELECTOR_FreeBlock( selectorEven );
360 if ( selectorOdd ) SELECTOR_FreeBlock( selectorOdd );
361 HeapDestroy( header->heap );
362 VirtualFree( base, 0, MEM_RELEASE );
366 header->selectorTableOffset = (LPBYTE)selectorTable - header->base;
367 header->selectorTableSize = nrBlocks * 4; /* ??? Win95 does it this way! */
368 header->selectorDelta = selectorEven - selectorOdd;
369 header->segment = segment? segment : selectorEven;
371 for (i = 0; i < nrBlocks; i++)
372 selectorTable[i] = (i & 1)? selectorOdd + ((i >> 1) << __AHSHIFT)
373 : selectorEven + ((i >> 1) << __AHSHIFT);
375 /* Move old segment */
379 /* FIXME: This is somewhat ugly and relies on implementation
380 details about 16-bit global memory handles ... */
382 LPBYTE oldBase = (LPBYTE)GetSelectorBase( segment );
383 memcpy( base, oldBase, segSize );
384 GLOBAL_MoveBlock( segment, base, totSize );
385 HeapFree( GetProcessHeap(), 0, oldBase );
388 return (HANDLE)header;
391 /***********************************************************************
392 * Local32_SearchHandle
394 static LPDWORD Local32_SearchHandle( LOCAL32HEADER *header, DWORD addr )
398 for ( handle = (LPDWORD)((LPBYTE)header + sizeof(LOCAL32HEADER));
399 handle < (LPDWORD)((LPBYTE)header + header->limit);
409 /***********************************************************************
412 static VOID Local32_ToHandle( LOCAL32HEADER *header, INT16 type,
413 DWORD addr, LPDWORD *handle, LPBYTE *ptr )
420 case -2: /* 16:16 pointer, no handles */
421 *ptr = MapSL( addr );
422 *handle = (LPDWORD)*ptr;
425 case -1: /* 32-bit offset, no handles */
426 *ptr = header->base + addr;
427 *handle = (LPDWORD)*ptr;
431 if ( addr >= sizeof(LOCAL32HEADER)
432 && addr < header->limit && !(addr & 3)
433 && *(LPDWORD)((LPBYTE)header + addr) >= HTABLE_SIZE )
435 *handle = (LPDWORD)((LPBYTE)header + addr);
436 *ptr = header->base + **handle;
440 case 1: /* 16:16 pointer */
441 *ptr = MapSL( addr );
442 *handle = Local32_SearchHandle( header, *ptr - header->base );
445 case 2: /* 32-bit offset */
446 *ptr = header->base + addr;
447 *handle = Local32_SearchHandle( header, *ptr - header->base );
452 /***********************************************************************
455 static VOID Local32_FromHandle( LOCAL32HEADER *header, INT16 type,
456 DWORD *addr, LPDWORD handle, LPBYTE ptr )
460 case -2: /* 16:16 pointer */
463 WORD *selTable = (LPWORD)(header->base + header->selectorTableOffset);
464 DWORD offset = (LPBYTE)ptr - header->base;
465 *addr = MAKELONG( offset & 0x7fff, selTable[offset >> 15] );
469 case -1: /* 32-bit offset */
471 *addr = ptr - header->base;
475 *addr = (LPBYTE)handle - (LPBYTE)header;
480 /***********************************************************************
483 DWORD WINAPI Local32Alloc16( HANDLE heap, DWORD size, INT16 type, DWORD flags )
485 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
490 /* Allocate memory */
491 ptr = HeapAlloc( header->heap,
492 (flags & LMEM_MOVEABLE)? HEAP_ZERO_MEMORY : 0, size );
496 /* Allocate handle if requested */
501 /* Find first page of handle table with free slots */
502 for (page = 0; page < HTABLE_NPAGES; page++)
503 if (header->freeListFirst[page] != 0)
505 if (page == HTABLE_NPAGES)
507 WARN("Out of handles!\n" );
508 HeapFree( header->heap, 0, ptr );
512 /* If virgin page, initialize it */
513 if (header->freeListFirst[page] == 0xffff)
515 if ( !VirtualAlloc( (LPBYTE)header + (page << 12),
516 0x1000, MEM_COMMIT, PAGE_READWRITE ) )
518 WARN("Cannot grow handle table!\n" );
519 HeapFree( header->heap, 0, ptr );
523 header->limit += HTABLE_PAGESIZE;
525 header->freeListFirst[page] = 0;
526 header->freeListLast[page] = HTABLE_PAGESIZE - 4;
527 header->freeListSize[page] = HTABLE_PAGESIZE / 4;
529 for (i = 0; i < HTABLE_PAGESIZE; i += 4)
530 *(DWORD *)((LPBYTE)header + i) = i+4;
532 if (page < HTABLE_NPAGES-1)
533 header->freeListFirst[page+1] = 0xffff;
536 /* Allocate handle slot from page */
537 handle = (LPDWORD)((LPBYTE)header + header->freeListFirst[page]);
538 if (--header->freeListSize[page] == 0)
539 header->freeListFirst[page] = header->freeListLast[page] = 0;
541 header->freeListFirst[page] = *handle;
543 /* Store 32-bit offset in handle slot */
544 *handle = ptr - header->base;
548 handle = (LPDWORD)ptr;
553 /* Convert handle to requested output type */
554 Local32_FromHandle( header, type, &addr, handle, ptr );
558 /***********************************************************************
561 DWORD WINAPI Local32ReAlloc16( HANDLE heap, DWORD addr, INT16 type,
562 DWORD size, DWORD flags )
564 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
569 return Local32Alloc16( heap, size, type, flags );
571 /* Retrieve handle and pointer */
572 Local32_ToHandle( header, type, addr, &handle, &ptr );
573 if (!handle) return FALSE;
575 /* Reallocate memory block */
576 ptr = HeapReAlloc( header->heap,
577 (flags & LMEM_MOVEABLE)? HEAP_ZERO_MEMORY : 0,
583 *handle = ptr - header->base;
585 handle = (LPDWORD)ptr;
587 /* Convert handle to requested output type */
588 Local32_FromHandle( header, type, &addr, handle, ptr );
592 /***********************************************************************
595 BOOL WINAPI Local32Free16( HANDLE heap, DWORD addr, INT16 type )
597 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
601 /* Retrieve handle and pointer */
602 Local32_ToHandle( header, type, addr, &handle, &ptr );
603 if (!handle) return FALSE;
605 /* Free handle if necessary */
608 int offset = (LPBYTE)handle - (LPBYTE)header;
609 int page = offset >> 12;
611 /* Return handle slot to page free list */
612 if (header->freeListSize[page]++ == 0)
613 header->freeListFirst[page] = header->freeListLast[page] = offset;
615 *(LPDWORD)((LPBYTE)header + header->freeListLast[page]) = offset,
616 header->freeListLast[page] = offset;
620 /* Shrink handle table when possible */
621 while (page > 0 && header->freeListSize[page] == HTABLE_PAGESIZE / 4)
623 if ( VirtualFree( (LPBYTE)header +
624 (header->limit & ~(HTABLE_PAGESIZE-1)),
625 HTABLE_PAGESIZE, MEM_DECOMMIT ) )
628 header->limit -= HTABLE_PAGESIZE;
629 header->freeListFirst[page] = 0xffff;
635 return HeapFree( header->heap, 0, ptr );
638 /***********************************************************************
641 DWORD WINAPI Local32Translate16( HANDLE heap, DWORD addr, INT16 type1, INT16 type2 )
643 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
647 Local32_ToHandle( header, type1, addr, &handle, &ptr );
648 if (!handle) return 0;
650 Local32_FromHandle( header, type2, &addr, handle, ptr );
654 /***********************************************************************
657 DWORD WINAPI Local32Size16( HANDLE heap, DWORD addr, INT16 type )
659 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
663 Local32_ToHandle( header, type, addr, &handle, &ptr );
664 if (!handle) return 0;
666 return HeapSize( header->heap, 0, ptr );
669 /***********************************************************************
672 BOOL WINAPI Local32ValidHandle16( HANDLE heap, WORD addr )
674 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
678 Local32_ToHandle( header, 0, addr, &handle, &ptr );
679 return handle != NULL;
682 /***********************************************************************
685 WORD WINAPI Local32GetSegment16( HANDLE heap )
687 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
688 return header->segment;
691 /***********************************************************************
694 static LOCAL32HEADER *Local32_GetHeap( HGLOBAL16 handle )
696 WORD selector = GlobalHandleToSel16( handle );
697 DWORD base = GetSelectorBase( selector );
698 DWORD limit = GetSelectorLimit16( selector );
700 /* Hmmm. This is a somewhat stupid heuristic, but Windows 95 does
703 if ( limit > 0x10000 && ((LOCAL32HEADER *)base)->magic == LOCAL32_MAGIC )
704 return (LOCAL32HEADER *)base;
709 if ( limit > 0x10000 && ((LOCAL32HEADER *)base)->magic == LOCAL32_MAGIC )
710 return (LOCAL32HEADER *)base;
715 /***********************************************************************
716 * Local32Info (KERNEL.444)
717 * Local32Info (TOOLHELP.84)
719 BOOL16 WINAPI Local32Info16( LOCAL32INFO *pLocal32Info, HGLOBAL16 handle )
721 PROCESS_HEAP_ENTRY entry;
724 LOCAL32HEADER *header = Local32_GetHeap( handle );
725 if ( !header ) return FALSE;
727 if ( !pLocal32Info || pLocal32Info->dwSize < sizeof(LOCAL32INFO) )
730 pLocal32Info->dwMemReserved = 0;
731 pLocal32Info->dwMemCommitted = 0;
732 pLocal32Info->dwTotalFree = 0;
733 pLocal32Info->dwLargestFreeBlock = 0;
735 while (HeapWalk( header->heap, &entry ))
737 if (entry.wFlags & PROCESS_HEAP_REGION)
739 pLocal32Info->dwMemReserved += entry.u.Region.dwCommittedSize
740 + entry.u.Region.dwUnCommittedSize;
741 pLocal32Info->dwMemCommitted = entry.u.Region.dwCommittedSize;
743 else if (!(entry.wFlags & PROCESS_HEAP_ENTRY_BUSY))
745 DWORD size = entry.cbData + entry.cbOverhead;
746 pLocal32Info->dwTotalFree += size;
747 if (size > pLocal32Info->dwLargestFreeBlock) pLocal32Info->dwLargestFreeBlock = size;
751 pLocal32Info->dwcFreeHandles = 0;
752 for ( i = 0; i < HTABLE_NPAGES; i++ )
754 if ( header->freeListFirst[i] == 0xffff ) break;
755 pLocal32Info->dwcFreeHandles += header->freeListSize[i];
757 pLocal32Info->dwcFreeHandles += (HTABLE_NPAGES - i) * HTABLE_PAGESIZE/4;
762 /***********************************************************************
763 * Local32First (KERNEL.445)
764 * Local32First (TOOLHELP.85)
766 BOOL16 WINAPI Local32First16( LOCAL32ENTRY *pLocal32Entry, HGLOBAL16 handle )
768 FIXME("(%p, %04X): stub!\n", pLocal32Entry, handle );
772 /***********************************************************************
773 * Local32Next (KERNEL.446)
774 * Local32Next (TOOLHELP.86)
776 BOOL16 WINAPI Local32Next16( LOCAL32ENTRY *pLocal32Entry )
778 FIXME("(%p): stub!\n", pLocal32Entry );
783 /* FIXME: these functions are needed for dlls that aren't properly separated yet */
785 LPVOID WINAPI HeapAlloc( HANDLE heap, DWORD flags, SIZE_T size )
787 return RtlAllocateHeap( heap, flags, size );
790 BOOL WINAPI HeapFree( HANDLE heap, DWORD flags, LPVOID ptr )
792 return RtlFreeHeap( heap, flags, ptr );
795 LPVOID WINAPI HeapReAlloc( HANDLE heap, DWORD flags, LPVOID ptr, SIZE_T size )
797 return RtlReAllocateHeap( heap, flags, ptr, size );
800 SIZE_T WINAPI HeapSize( HANDLE heap, DWORD flags, LPVOID ptr )
802 return RtlSizeHeap( heap, flags, ptr );
805 void WINAPI EnterCriticalSection( CRITICAL_SECTION *crit )
807 RtlEnterCriticalSection( crit );
810 BOOL WINAPI TryEnterCriticalSection( CRITICAL_SECTION *crit )
812 return RtlTryEnterCriticalSection( crit );
815 void WINAPI DeleteCriticalSection( CRITICAL_SECTION *crit )
817 RtlDeleteCriticalSection( crit );
820 void WINAPI LeaveCriticalSection( CRITICAL_SECTION *crit )
822 RtlLeaveCriticalSection( crit );