Sweden-Number/dlls/ole32/ifs.c

570 lines
15 KiB
C

/*
* basic interfaces
*
* Copyright 1997 Marcus Meissner
*
* 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 <ctype.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "ole2.h"
#include "winerror.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(olemalloc);
/******************************************************************************
* IMalloc32 implementation
*
* NOTES
* For supporting CoRegisterMallocSpy the IMalloc implementation must know if
* a given memory block was allocated with a spy active.
*
*****************************************************************************/
/* set the vtable later */
static const IMallocVtbl VT_IMalloc32;
struct allocator
{
IMalloc IMalloc_iface;
IMallocSpy * pSpy; /* the spy when active */
DWORD SpyedAllocationsLeft; /* number of spyed allocations left */
BOOL SpyReleasePending; /* CoRevokeMallocSpy called with spyed allocations left*/
LPVOID * SpyedBlocks; /* root of the table */
DWORD SpyedBlockTableLength;/* size of the table*/
};
static struct allocator Malloc32 = { .IMalloc_iface.lpVtbl = &VT_IMalloc32 };
/* with a spy active all calls from pre to post methods are threadsafe */
static CRITICAL_SECTION IMalloc32_SpyCS;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &IMalloc32_SpyCS,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": IMalloc32_SpyCS") }
};
static CRITICAL_SECTION IMalloc32_SpyCS = { &critsect_debug, -1, 0, 0, 0, 0 };
/* resize the old table */
static BOOL SetSpyedBlockTableLength ( DWORD NewLength )
{
LPVOID *NewSpyedBlocks;
if (!Malloc32.SpyedBlocks) NewSpyedBlocks = LocalAlloc(LMEM_ZEROINIT, NewLength * sizeof(PVOID));
else NewSpyedBlocks = LocalReAlloc(Malloc32.SpyedBlocks, NewLength * sizeof(PVOID), LMEM_ZEROINIT | LMEM_MOVEABLE);
if (NewSpyedBlocks) {
Malloc32.SpyedBlocks = NewSpyedBlocks;
Malloc32.SpyedBlockTableLength = NewLength;
}
return NewSpyedBlocks != NULL;
}
/* add a location to the table */
static BOOL AddMemoryLocation(LPVOID * pMem)
{
LPVOID * Current;
/* allocate the table if not already allocated */
if (!Malloc32.SpyedBlockTableLength && !SetSpyedBlockTableLength(0x1000))
return FALSE;
/* find a free location */
Current = Malloc32.SpyedBlocks;
while (*Current) {
Current++;
if (Current >= Malloc32.SpyedBlocks + Malloc32.SpyedBlockTableLength) {
/* no more space in table, grow it */
DWORD old_length = Malloc32.SpyedBlockTableLength;
if (!SetSpyedBlockTableLength( Malloc32.SpyedBlockTableLength + 0x1000))
return FALSE;
Current = Malloc32.SpyedBlocks + old_length;
}
};
/* put the location in our table */
*Current = pMem;
Malloc32.SpyedAllocationsLeft++;
/*TRACE("%lu\n",Malloc32.SpyedAllocationsLeft);*/
return TRUE;
}
static void** mallocspy_is_allocation_spyed(const void *mem)
{
void **current = Malloc32.SpyedBlocks;
while (*current != mem)
{
current++;
if (current >= Malloc32.SpyedBlocks + Malloc32.SpyedBlockTableLength)
return NULL;
}
return current;
}
static BOOL mallocspy_remove_spyed_memory(const void *mem)
{
void **current;
if (!Malloc32.SpyedBlockTableLength)
return FALSE;
if (!(current = mallocspy_is_allocation_spyed(mem)))
return FALSE;
Malloc32.SpyedAllocationsLeft--;
*current = NULL;
return TRUE;
}
/******************************************************************************
* IMalloc32_QueryInterface [VTABLE]
*/
static HRESULT WINAPI IMalloc_fnQueryInterface(IMalloc *iface, REFIID refiid, void **obj)
{
TRACE("(%s,%p)\n",debugstr_guid(refiid),obj);
if (IsEqualIID(&IID_IUnknown,refiid) || IsEqualIID(&IID_IMalloc,refiid)) {
*obj = &Malloc32;
return S_OK;
}
return E_NOINTERFACE;
}
/******************************************************************************
* IMalloc32_AddRefRelease [VTABLE]
*/
static ULONG WINAPI IMalloc_fnAddRefRelease(IMalloc *iface)
{
return 1;
}
/******************************************************************************
* IMalloc32_Alloc [VTABLE]
*/
static void * WINAPI IMalloc_fnAlloc(IMalloc *iface, SIZE_T cb)
{
void *addr;
TRACE("(%ld)\n",cb);
if(Malloc32.pSpy) {
SIZE_T preAllocResult;
EnterCriticalSection(&IMalloc32_SpyCS);
preAllocResult = IMallocSpy_PreAlloc(Malloc32.pSpy, cb);
if ((cb != 0) && (preAllocResult == 0)) {
/* PreAlloc can force Alloc to fail, but not if cb == 0 */
TRACE("returning null\n");
LeaveCriticalSection(&IMalloc32_SpyCS);
return NULL;
}
}
addr = HeapAlloc(GetProcessHeap(),0,cb);
if(Malloc32.pSpy) {
addr = IMallocSpy_PostAlloc(Malloc32.pSpy, addr);
if (addr) AddMemoryLocation(addr);
LeaveCriticalSection(&IMalloc32_SpyCS);
}
TRACE("--(%p)\n",addr);
return addr;
}
/******************************************************************************
* IMalloc32_Realloc [VTABLE]
*/
static void * WINAPI IMalloc_fnRealloc(IMalloc *iface, void *pv, SIZE_T cb)
{
void *pNewMemory;
TRACE("(%p,%ld)\n",pv,cb);
if(Malloc32.pSpy) {
void *pRealMemory;
BOOL fSpyed;
EnterCriticalSection(&IMalloc32_SpyCS);
fSpyed = mallocspy_remove_spyed_memory(pv);
cb = IMallocSpy_PreRealloc(Malloc32.pSpy, pv, cb, &pRealMemory, fSpyed);
/* check if can release the spy */
if(Malloc32.SpyReleasePending && !Malloc32.SpyedAllocationsLeft) {
IMallocSpy_Release(Malloc32.pSpy);
Malloc32.SpyReleasePending = FALSE;
Malloc32.pSpy = NULL;
LeaveCriticalSection(&IMalloc32_SpyCS);
}
if (0==cb) {
/* PreRealloc can force Realloc to fail */
if (Malloc32.pSpy)
LeaveCriticalSection(&IMalloc32_SpyCS);
return NULL;
}
pv = pRealMemory;
}
if (!pv) pNewMemory = HeapAlloc(GetProcessHeap(),0,cb);
else if (cb) pNewMemory = HeapReAlloc(GetProcessHeap(),0,pv,cb);
else {
HeapFree(GetProcessHeap(),0,pv);
pNewMemory = NULL;
}
if(Malloc32.pSpy) {
pNewMemory = IMallocSpy_PostRealloc(Malloc32.pSpy, pNewMemory, TRUE);
if (pNewMemory) AddMemoryLocation(pNewMemory);
LeaveCriticalSection(&IMalloc32_SpyCS);
}
TRACE("--(%p)\n",pNewMemory);
return pNewMemory;
}
/******************************************************************************
* IMalloc32_Free [VTABLE]
*/
static void WINAPI IMalloc_fnFree(IMalloc *iface, void *mem)
{
BOOL spyed_block = FALSE, spy_active = FALSE;
TRACE("(%p)\n", mem);
if (!mem)
return;
if (Malloc32.pSpy)
{
EnterCriticalSection(&IMalloc32_SpyCS);
spyed_block = mallocspy_remove_spyed_memory(mem);
spy_active = TRUE;
mem = IMallocSpy_PreFree(Malloc32.pSpy, mem, spyed_block);
}
HeapFree(GetProcessHeap(), 0, mem);
if (spy_active)
{
IMallocSpy_PostFree(Malloc32.pSpy, spyed_block);
/* check if can release the spy */
if (Malloc32.SpyReleasePending && !Malloc32.SpyedAllocationsLeft)
{
IMallocSpy_Release(Malloc32.pSpy);
Malloc32.SpyReleasePending = FALSE;
Malloc32.pSpy = NULL;
}
LeaveCriticalSection(&IMalloc32_SpyCS);
}
}
/******************************************************************************
* IMalloc32_GetSize [VTABLE]
*
* NOTES
* FIXME returns:
* win95: size allocated (4 byte boundaries)
* win2k: size originally requested !!! (allocated on 8 byte boundaries)
*/
static SIZE_T WINAPI IMalloc_fnGetSize(IMalloc *iface, void *mem)
{
BOOL spyed_block = FALSE, spy_active = FALSE;
SIZE_T size;
TRACE("(%p)\n", mem);
if (!mem)
return (SIZE_T)-1;
if (Malloc32.pSpy)
{
EnterCriticalSection(&IMalloc32_SpyCS);
spyed_block = !!mallocspy_is_allocation_spyed(mem);
spy_active = TRUE;
mem = IMallocSpy_PreGetSize(Malloc32.pSpy, mem, spyed_block);
}
size = HeapSize(GetProcessHeap(), 0, mem);
if (spy_active)
{
size = IMallocSpy_PostGetSize(Malloc32.pSpy, size, spyed_block);
LeaveCriticalSection(&IMalloc32_SpyCS);
}
return size;
}
/******************************************************************************
* IMalloc32_DidAlloc [VTABLE]
*/
static INT WINAPI IMalloc_fnDidAlloc(IMalloc *iface, void *mem)
{
BOOL spyed_block = FALSE, spy_active = FALSE;
int did_alloc;
TRACE("(%p)\n", mem);
if (!mem)
return -1;
if (Malloc32.pSpy)
{
EnterCriticalSection(&IMalloc32_SpyCS);
spyed_block = !!mallocspy_is_allocation_spyed(mem);
spy_active = TRUE;
mem = IMallocSpy_PreDidAlloc(Malloc32.pSpy, mem, spyed_block);
}
did_alloc = HeapValidate(GetProcessHeap(), 0, mem);
if (spy_active)
{
did_alloc = IMallocSpy_PostDidAlloc(Malloc32.pSpy, mem, spyed_block, did_alloc);
LeaveCriticalSection(&IMalloc32_SpyCS);
}
return did_alloc;
}
/******************************************************************************
* IMalloc32_HeapMinimize [VTABLE]
*/
static void WINAPI IMalloc_fnHeapMinimize(IMalloc *iface)
{
BOOL spy_active = FALSE;
TRACE("()\n");
if (Malloc32.pSpy)
{
EnterCriticalSection(&IMalloc32_SpyCS);
spy_active = TRUE;
IMallocSpy_PreHeapMinimize(Malloc32.pSpy);
}
if (spy_active)
{
IMallocSpy_PostHeapMinimize(Malloc32.pSpy);
LeaveCriticalSection(&IMalloc32_SpyCS);
}
}
static const IMallocVtbl VT_IMalloc32 =
{
IMalloc_fnQueryInterface,
IMalloc_fnAddRefRelease,
IMalloc_fnAddRefRelease,
IMalloc_fnAlloc,
IMalloc_fnRealloc,
IMalloc_fnFree,
IMalloc_fnGetSize,
IMalloc_fnDidAlloc,
IMalloc_fnHeapMinimize
};
/******************************************************************************
* CoGetMalloc [OLE32.@]
*
* Retrieves the current IMalloc interface for the process.
*
* PARAMS
* context [I] Should always be MEMCTX_TASK.
* imalloc [O] Address where memory allocator object will be stored.
*
* RETURNS
* Success: S_OK.
* Failure: HRESULT code.
*/
HRESULT WINAPI CoGetMalloc(DWORD context, IMalloc **imalloc)
{
if (context != MEMCTX_TASK) {
*imalloc = NULL;
return E_INVALIDARG;
}
*imalloc = &Malloc32.IMalloc_iface;
return S_OK;
}
/***********************************************************************
* CoTaskMemAlloc [OLE32.@]
*
* Allocates memory using the current process memory allocator.
*
* PARAMS
* size [I] Size of the memory block to allocate.
*
* RETURNS
* Success: Pointer to newly allocated memory block.
* Failure: NULL.
*/
LPVOID WINAPI CoTaskMemAlloc(SIZE_T size)
{
return IMalloc_Alloc(&Malloc32.IMalloc_iface,size);
}
/***********************************************************************
* CoTaskMemFree [OLE32.@]
*
* Frees memory allocated from the current process memory allocator.
*
* PARAMS
* ptr [I] Memory block to free.
*
* RETURNS
* Nothing.
*/
VOID WINAPI CoTaskMemFree(LPVOID ptr)
{
IMalloc_Free(&Malloc32.IMalloc_iface, ptr);
}
/***********************************************************************
* CoTaskMemRealloc [OLE32.@]
*
* Allocates memory using the current process memory allocator.
*
* PARAMS
* pvOld [I] Pointer to old memory block.
* size [I] Size of the new memory block.
*
* RETURNS
* Success: Pointer to newly allocated memory block.
* Failure: NULL.
*/
LPVOID WINAPI CoTaskMemRealloc(LPVOID pvOld, SIZE_T size)
{
return IMalloc_Realloc(&Malloc32.IMalloc_iface, pvOld, size);
}
/***********************************************************************
* CoRegisterMallocSpy [OLE32.@]
*
* Registers an object that receives notifications on memory allocations and
* frees.
*
* PARAMS
* pMallocSpy [I] New spy object.
*
* RETURNS
* Success: S_OK.
* Failure: HRESULT code.
*
* NOTES
* if a mallocspy is already registered, we can't do it again since
* only the spy knows, how to free a memory block
*/
HRESULT WINAPI CoRegisterMallocSpy(LPMALLOCSPY pMallocSpy)
{
IMallocSpy* pSpy;
HRESULT hres = E_INVALIDARG;
TRACE("%p\n", pMallocSpy);
if(!pMallocSpy) return E_INVALIDARG;
EnterCriticalSection(&IMalloc32_SpyCS);
if (Malloc32.pSpy)
hres = CO_E_OBJISREG;
else if (SUCCEEDED(IMallocSpy_QueryInterface(pMallocSpy, &IID_IMallocSpy, (void**)&pSpy))) {
Malloc32.pSpy = pSpy;
hres = S_OK;
}
LeaveCriticalSection(&IMalloc32_SpyCS);
return hres;
}
/***********************************************************************
* CoRevokeMallocSpy [OLE32.@]
*
* Revokes a previously registered object that receives notifications on memory
* allocations and frees.
*
* PARAMS
* pMallocSpy [I] New spy object.
*
* RETURNS
* Success: S_OK.
* Failure: HRESULT code.
*
* NOTES
* we can't revoke a malloc spy as long as memory blocks allocated with
* the spy are active since only the spy knows how to free them
*/
HRESULT WINAPI CoRevokeMallocSpy(void)
{
HRESULT hres = S_OK;
TRACE("\n");
EnterCriticalSection(&IMalloc32_SpyCS);
if (!Malloc32.pSpy)
hres = CO_E_OBJNOTREG;
else if (Malloc32.SpyedAllocationsLeft) {
TRACE("SpyReleasePending with %u allocations left\n", Malloc32.SpyedAllocationsLeft);
Malloc32.SpyReleasePending = TRUE;
hres = E_ACCESSDENIED;
} else {
IMallocSpy_Release(Malloc32.pSpy);
Malloc32.pSpy = NULL;
}
LeaveCriticalSection(&IMalloc32_SpyCS);
return hres;
}
/******************************************************************************
* IsValidInterface [OLE32.@]
*
* Determines whether a pointer is a valid interface.
*
* PARAMS
* punk [I] Interface to be tested.
*
* RETURNS
* TRUE, if the passed pointer is a valid interface, or FALSE otherwise.
*/
BOOL WINAPI IsValidInterface(LPUNKNOWN punk)
{
return !(
IsBadReadPtr(punk,4) ||
IsBadReadPtr(punk->lpVtbl,4) ||
IsBadReadPtr(punk->lpVtbl->QueryInterface,9) ||
IsBadCodePtr((FARPROC)punk->lpVtbl->QueryInterface)
);
}