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Sweden-Number/dlls/kernel32/heap.c

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/*
* Win32 heap functions
*
* Copyright 1995, 1996 Alexandre Julliard
* Copyright 1996 Huw Davies
* Copyright 1998 Ulrich Weigand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include <limits.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winnt.h"
#include "winternl.h"
#include "wine/exception.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(globalmem);
/* address where we try to map the system heap */
#define SYSTEM_HEAP_BASE ((void*)0x80000000)
#define SYSTEM_HEAP_SIZE 0x1000000 /* Default heap size = 16Mb */
static HANDLE systemHeap; /* globally shared heap */
/***********************************************************************
* HEAP_CreateSystemHeap
*
* Create the system heap.
*/
static inline HANDLE HEAP_CreateSystemHeap(void)
{
int created;
void *base;
HANDLE map, event;
/* create the system heap event first */
event = CreateEventA( NULL, TRUE, FALSE, "__wine_system_heap_event" );
if (!(map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE,
0, SYSTEM_HEAP_SIZE, "__wine_system_heap" ))) return 0;
created = (GetLastError() != ERROR_ALREADY_EXISTS);
if (!(base = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, SYSTEM_HEAP_BASE )))
{
/* pre-defined address not available */
ERR( "system heap base address %p not available\n", SYSTEM_HEAP_BASE );
return 0;
}
if (created) /* newly created heap */
{
systemHeap = RtlCreateHeap( HEAP_SHARED, base, SYSTEM_HEAP_SIZE,
SYSTEM_HEAP_SIZE, NULL, NULL );
SetEvent( event );
}
else
{
/* wait for the heap to be initialized */
WaitForSingleObject( event, INFINITE );
systemHeap = base;
}
CloseHandle( map );
return systemHeap;
}
/***********************************************************************
* HeapCreate (KERNEL32.@)
*
* Create a heap object.
*
* RETURNS
* Handle of heap: Success
* NULL: Failure
*/
HANDLE WINAPI HeapCreate(
DWORD flags, /* [in] Heap allocation flag */
SIZE_T initialSize, /* [in] Initial heap size */
SIZE_T maxSize /* [in] Maximum heap size */
) {
HANDLE ret;
if ( flags & HEAP_SHARED )
{
if (!systemHeap) HEAP_CreateSystemHeap();
else WARN( "Shared Heap requested, returning system heap.\n" );
ret = systemHeap;
}
else
{
ret = RtlCreateHeap( flags, NULL, maxSize, initialSize, NULL, NULL );
if (!ret) SetLastError( ERROR_NOT_ENOUGH_MEMORY );
}
return ret;
}
/***********************************************************************
* HeapDestroy (KERNEL32.@)
*
* Destroy a heap object.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapDestroy( HANDLE heap /* [in] Handle of heap */ )
{
if (heap == systemHeap)
{
WARN( "attempt to destroy system heap, returning TRUE!\n" );
return TRUE;
}
if (!RtlDestroyHeap( heap )) return TRUE;
SetLastError( ERROR_INVALID_HANDLE );
return FALSE;
}
/*
* Win32 Global heap functions (GlobalXXX).
* These functions included in Win32 for compatibility with 16 bit Windows
* Especially the moveable blocks and handles are oldish.
* But the ability to directly allocate memory with GPTR and LPTR is widely
* used.
*
* The handle stuff looks horrible, but it's implemented almost like Win95
* does it.
*
*/
#define MAGIC_GLOBAL_USED 0x5342
#define HANDLE_TO_INTERN(h) ((PGLOBAL32_INTERN)(((char *)(h))-2))
#define INTERN_TO_HANDLE(i) (&((i)->Pointer))
#define POINTER_TO_HANDLE(p) (*(((const HGLOBAL *)(p))-2))
#define ISHANDLE(h) (((ULONG_PTR)(h)&2)!=0)
#define ISPOINTER(h) (((ULONG_PTR)(h)&2)==0)
/* align the storage needed for the HGLOBAL on an 8byte boundary thus
* GlobalAlloc/GlobalReAlloc'ing with GMEM_MOVEABLE of memory with
* size = 8*k, where k=1,2,3,... alloc's exactly the given size.
* The Minolta DiMAGE Image Viewer heavily relies on this, corrupting
* the output jpeg's > 1 MB if not */
#define HGLOBAL_STORAGE (sizeof(HGLOBAL)*2)
#include "pshpack1.h"
typedef struct __GLOBAL32_INTERN
{
WORD Magic;
LPVOID Pointer;
BYTE Flags;
BYTE LockCount;
} GLOBAL32_INTERN, *PGLOBAL32_INTERN;
#include "poppack.h"
/***********************************************************************
* GlobalLock (KERNEL32.@)
*
* Lock a global memory object and return a pointer to first byte of the memory
*
* PARAMS
* hmem [I] Handle of the global memory object
*
* RETURNS
* Success: Pointer to first byte of the memory block
* Failure: NULL
*
* NOTES
* When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
*
*/
LPVOID WINAPI GlobalLock(HGLOBAL hmem)
{
return LocalLock( hmem );
}
/***********************************************************************
* GlobalUnlock (KERNEL32.@)
*
* Unlock a global memory object.
*
* PARAMS
* hmem [I] Handle of the global memory object
*
* RETURNS
* Success: Object is still locked
* Failure: FALSE (The Object is unlocked)
*
* NOTES
* When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
*
*/
BOOL WINAPI GlobalUnlock(HGLOBAL hmem)
{
if (ISPOINTER( hmem )) return TRUE;
return LocalUnlock( hmem );
}
/***********************************************************************
* GlobalHandle (KERNEL32.@)
*
* Get the handle associated with the pointer to a global memory block.
*
* RETURNS
* Handle: Success
* NULL: Failure
*/
HGLOBAL WINAPI GlobalHandle(
LPCVOID pmem /* [in] Pointer to global memory block */
) {
HGLOBAL handle;
PGLOBAL32_INTERN maybe_intern;
LPCVOID test;
if (!pmem)
{
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
RtlLockHeap(GetProcessHeap());
__TRY
{
handle = 0;
/* note that if pmem is a pointer to a block allocated by */
/* GlobalAlloc with GMEM_MOVEABLE then magic test in HeapValidate */
/* will fail. */
if (ISPOINTER(pmem)) {
if (HeapValidate( GetProcessHeap(), HEAP_NO_SERIALIZE, pmem )) {
handle = (HGLOBAL)pmem; /* valid fixed block */
break;
}
handle = POINTER_TO_HANDLE(pmem);
} else
handle = (HGLOBAL)pmem;
/* Now test handle either passed in or retrieved from pointer */
maybe_intern = HANDLE_TO_INTERN( handle );
if (maybe_intern->Magic == MAGIC_GLOBAL_USED) {
test = maybe_intern->Pointer;
if (HeapValidate( GetProcessHeap(), HEAP_NO_SERIALIZE, (const char *)test - HGLOBAL_STORAGE ) && /* obj(-handle) valid arena? */
HeapValidate( GetProcessHeap(), HEAP_NO_SERIALIZE, maybe_intern )) /* intern valid arena? */
break; /* valid moveable block */
}
handle = 0;
SetLastError( ERROR_INVALID_HANDLE );
}
__EXCEPT_PAGE_FAULT
{
SetLastError( ERROR_INVALID_HANDLE );
handle = 0;
}
__ENDTRY
RtlUnlockHeap(GetProcessHeap());
return handle;
}
/***********************************************************************
* GlobalReAlloc (KERNEL32.@)
*
* Change the size or attributes of a global memory object.
*
* RETURNS
* Handle: Success
* NULL: Failure
*/
HGLOBAL WINAPI GlobalReAlloc( HGLOBAL hmem, SIZE_T size, UINT flags )
{
return LocalReAlloc( hmem, size, flags );
}
/***********************************************************************
* GlobalSize (KERNEL32.@)
*
* Get the size of a global memory object.
*
* PARAMS
* hmem [I] Handle of the global memory object
*
* RETURNS
* Failure: 0
* Success: Size in Bytes of the global memory object
*
* NOTES
* When the handle is invalid, last error is set to ERROR_INVALID_HANDLE
*
*/
SIZE_T WINAPI GlobalSize(HGLOBAL hmem)
{
SIZE_T retval;
PGLOBAL32_INTERN pintern;
if (!((ULONG_PTR)hmem >> 16))
{
SetLastError(ERROR_INVALID_HANDLE);
return 0;
}
if(ISPOINTER(hmem))
{
retval=HeapSize(GetProcessHeap(), 0, hmem);
if (retval == ~(SIZE_T)0) /* It might be a GMEM_MOVEABLE data pointer */
{
retval = HeapSize(GetProcessHeap(), 0, (char*)hmem - HGLOBAL_STORAGE);
if (retval != ~(SIZE_T)0) retval -= HGLOBAL_STORAGE;
}
}
else
{
RtlLockHeap(GetProcessHeap());
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->Magic==MAGIC_GLOBAL_USED)
{
if (!pintern->Pointer) /* handle case of GlobalAlloc( ??,0) */
retval = 0;
else
{
retval = HeapSize(GetProcessHeap(), 0, (char *)pintern->Pointer - HGLOBAL_STORAGE );
if (retval != ~(SIZE_T)0) retval -= HGLOBAL_STORAGE;
}
}
else
{
WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
SetLastError(ERROR_INVALID_HANDLE);
retval=0;
}
RtlUnlockHeap(GetProcessHeap());
}
if (retval == ~(SIZE_T)0) retval = 0;
return retval;
}
/***********************************************************************
* GlobalWire (KERNEL32.@)
*/
LPVOID WINAPI GlobalWire(HGLOBAL hmem)
{
return GlobalLock( hmem );
}
/***********************************************************************
* GlobalUnWire (KERNEL32.@)
*/
BOOL WINAPI GlobalUnWire(HGLOBAL hmem)
{
return GlobalUnlock( hmem);
}
/***********************************************************************
* GlobalFix (KERNEL32.@)
*/
VOID WINAPI GlobalFix(HGLOBAL hmem)
{
GlobalLock( hmem );
}
/***********************************************************************
* GlobalUnfix (KERNEL32.@)
*/
VOID WINAPI GlobalUnfix(HGLOBAL hmem)
{
GlobalUnlock( hmem);
}
/***********************************************************************
* GlobalFlags (KERNEL32.@)
*
* Get information about a global memory object.
*
* PARAMS
* hmem [I] Handle of the global memory object
*
* RETURNS
* Failure: GMEM_INVALID_HANDLE, when the provided handle is invalid
* Success: Value specifying allocation flags and lock count
*
*/
UINT WINAPI GlobalFlags(HGLOBAL hmem)
{
DWORD retval;
PGLOBAL32_INTERN pintern;
if(ISPOINTER(hmem))
{
retval=0;
}
else
{
RtlLockHeap(GetProcessHeap());
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->Magic==MAGIC_GLOBAL_USED)
{
retval=pintern->LockCount + (pintern->Flags<<8);
if(pintern->Pointer==0)
retval|= GMEM_DISCARDED;
}
else
{
WARN("invalid handle %p (Magic: 0x%04x)\n", hmem, pintern->Magic);
SetLastError(ERROR_INVALID_HANDLE);
retval = GMEM_INVALID_HANDLE;
}
RtlUnlockHeap(GetProcessHeap());
}
return retval;
}
/***********************************************************************
* GlobalCompact (KERNEL32.@)
*/
SIZE_T WINAPI GlobalCompact( DWORD minfree )
{
return 0; /* GlobalCompact does nothing in Win32 */
}
/***********************************************************************
* LocalCompact (KERNEL32.@)
*/
SIZE_T WINAPI LocalCompact( UINT minfree )
{
return 0; /* LocalCompact does nothing in Win32 */
}
/***********************************************************************
* LocalFlags (KERNEL32.@)
*
* Get information about a local memory object.
*
* RETURNS
* Value specifying allocation flags and lock count.
* LMEM_INVALID_HANDLE: Failure
*
* NOTES
* Windows memory management does not provide a separate local heap
* and global heap.
*/
UINT WINAPI LocalFlags(
HLOCAL handle /* [in] Handle of memory object */
) {
return GlobalFlags( handle );
}
/***********************************************************************
* LocalHandle (KERNEL32.@)
*
* Get the handle associated with the pointer to a local memory block.
*
* RETURNS
* Handle: Success
* NULL: Failure
*
* NOTES
* Windows memory management does not provide a separate local heap
* and global heap.
*/
HLOCAL WINAPI LocalHandle(
LPCVOID ptr /* [in] Address of local memory block */
) {
return GlobalHandle( ptr );
}
/***********************************************************************
* LocalShrink (KERNEL32.@)
*/
SIZE_T WINAPI LocalShrink( HGLOBAL handle, UINT newsize )
{
return 0; /* LocalShrink does nothing in Win32 */
}
/***********************************************************************
* LocalSize (KERNEL32.@)
*
* Get the size of a local memory object.
*
* RETURNS
* Size: Success
* 0: Failure
*
* NOTES
* Windows memory management does not provide a separate local heap
* and global heap.
*/
SIZE_T WINAPI LocalSize(
HLOCAL handle /* [in] Handle of memory object */
) {
return GlobalSize( handle );
}
/***********************************************************************
* GlobalMemoryStatus (KERNEL32.@)
* Provides information about the status of the memory, so apps can tell
* roughly how much they are able to allocate
*
* RETURNS
* None
*/
VOID WINAPI GlobalMemoryStatus( LPMEMORYSTATUS lpBuffer )
{
MEMORYSTATUSEX memstatus;
OSVERSIONINFOW osver;
IMAGE_NT_HEADERS *nt = RtlImageNtHeader( GetModuleHandleW(0) );
/* Because GlobalMemoryStatus is identical to GlobalMemoryStatusEX save
for one extra field in the struct, and the lack of a bug, we simply
call GlobalMemoryStatusEx and copy the values across. */
memstatus.dwLength = sizeof(memstatus);
GlobalMemoryStatusEx(&memstatus);
lpBuffer->dwLength = sizeof(*lpBuffer);
lpBuffer->dwMemoryLoad = memstatus.dwMemoryLoad;
/* Windows 2000 and later report -1 when values are greater than 4 Gb.
* NT reports values modulo 4 Gb.
*/
osver.dwOSVersionInfoSize = sizeof(osver);
GetVersionExW(&osver);
if ( osver.dwMajorVersion >= 5 || osver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS )
{
lpBuffer->dwTotalPhys = min( memstatus.ullTotalPhys, MAXDWORD );
lpBuffer->dwAvailPhys = min( memstatus.ullAvailPhys, MAXDWORD );
/* Limit value for apps that do not expect so much memory. Remove last 512 kb to make Sacrifice demo happy. */
lpBuffer->dwTotalPageFile = min( memstatus.ullTotalPageFile, 0xfff7ffff );
lpBuffer->dwAvailPageFile = min( memstatus.ullAvailPageFile, MAXDWORD );
lpBuffer->dwTotalVirtual = min( memstatus.ullTotalVirtual, MAXDWORD );
lpBuffer->dwAvailVirtual = min( memstatus.ullAvailVirtual, MAXDWORD );
}
else /* duplicate NT bug */
{
lpBuffer->dwTotalPhys = memstatus.ullTotalPhys;
lpBuffer->dwAvailPhys = memstatus.ullAvailPhys;
lpBuffer->dwTotalPageFile = memstatus.ullTotalPageFile;
lpBuffer->dwAvailPageFile = memstatus.ullAvailPageFile;
lpBuffer->dwTotalVirtual = memstatus.ullTotalVirtual;
lpBuffer->dwAvailVirtual = memstatus.ullAvailVirtual;
}
/* values are limited to 2Gb unless the app has the IMAGE_FILE_LARGE_ADDRESS_AWARE flag */
/* page file sizes are not limited (Adobe Illustrator 8 depends on this) */
if (!(nt->FileHeader.Characteristics & IMAGE_FILE_LARGE_ADDRESS_AWARE))
{
if (lpBuffer->dwTotalPhys > MAXLONG) lpBuffer->dwTotalPhys = MAXLONG;
if (lpBuffer->dwAvailPhys > MAXLONG) lpBuffer->dwAvailPhys = MAXLONG;
if (lpBuffer->dwTotalVirtual > MAXLONG) lpBuffer->dwTotalVirtual = MAXLONG;
if (lpBuffer->dwAvailVirtual > MAXLONG) lpBuffer->dwAvailVirtual = MAXLONG;
}
/* work around for broken photoshop 4 installer */
if ( lpBuffer->dwAvailPhys + lpBuffer->dwAvailPageFile >= 2U*1024*1024*1024)
lpBuffer->dwAvailPageFile = 2U*1024*1024*1024 - lpBuffer->dwAvailPhys - 1;
/* limit page file size for really old binaries */
if (nt->OptionalHeader.MajorSubsystemVersion < 4 ||
nt->OptionalHeader.MajorOperatingSystemVersion < 4)
{
if (lpBuffer->dwTotalPageFile > MAXLONG) lpBuffer->dwTotalPageFile = MAXLONG;
if (lpBuffer->dwAvailPageFile > MAXLONG) lpBuffer->dwAvailPageFile = MAXLONG;
}
TRACE("Length %u, MemoryLoad %u, TotalPhys %lx, AvailPhys %lx,"
" TotalPageFile %lx, AvailPageFile %lx, TotalVirtual %lx, AvailVirtual %lx\n",
lpBuffer->dwLength, lpBuffer->dwMemoryLoad, lpBuffer->dwTotalPhys,
lpBuffer->dwAvailPhys, lpBuffer->dwTotalPageFile, lpBuffer->dwAvailPageFile,
lpBuffer->dwTotalVirtual, lpBuffer->dwAvailVirtual );
}
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