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Sweden-Number/dlls/rpcrt4/cproxy.c

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/*
* COM proxy implementation
*
* Copyright 2001 Ove Kåven, TransGaming Technologies
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* TODO: Handle non-i386 architectures
* Get rid of #if 0'ed code.
*/
#include <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "objbase.h"
#include "rpcproxy.h"
#include "cpsf.h"
#include "ndr_misc.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(ole);
struct StublessThunk;
/* I don't know what MS's std proxy structure looks like,
so this probably doesn't match, but that shouldn't matter */
typedef struct {
const IRpcProxyBufferVtbl *lpVtbl;
LPVOID *PVtbl;
DWORD RefCount;
const MIDL_STUBLESS_PROXY_INFO *stubless;
const IID* piid;
LPUNKNOWN pUnkOuter;
PCInterfaceName name;
LPPSFACTORYBUFFER pPSFactory;
LPRPCCHANNELBUFFER pChannel;
struct StublessThunk *thunks;
} StdProxyImpl;
static const IRpcProxyBufferVtbl StdProxy_Vtbl;
#define ICOM_THIS_MULTI(impl,field,iface) impl* const This=(impl*)((char*)(iface) - offsetof(impl,field))
/* How the Windows stubless proxy thunks work is explained at
* http://msdn.microsoft.com/library/en-us/dnmsj99/html/com0199.asp,
* but I'll use a slightly different method, to make life easier */
#if defined(__i386__)
#include "pshpack1.h"
struct StublessThunk {
BYTE push;
DWORD index;
BYTE call;
LONG handler;
BYTE ret;
WORD bytes;
BYTE pad[3];
};
#include "poppack.h"
/* adjust the stack size since we don't use Windows's method */
#define STACK_ADJUST sizeof(DWORD)
#define FILL_STUBLESS(x,idx,stk) \
x->push = 0x68; /* pushl [immediate] */ \
x->index = (idx); \
x->call = 0xe8; /* call [near] */ \
x->handler = (char*)ObjectStubless - (char*)&x->ret; \
x->ret = 0xc2; /* ret [immediate] */ \
x->bytes = stk; \
x->pad[0] = 0x8d; /* leal (%esi),%esi */ \
x->pad[1] = 0x76; \
x->pad[2] = 0x00;
static HRESULT WINAPI ObjectStubless(DWORD index)
{
char *args = (char*)(&index + 2);
LPVOID iface = *(LPVOID*)args;
ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
PFORMAT_STRING fs = This->stubless->ProcFormatString + This->stubless->FormatStringOffset[index];
unsigned bytes = *(const WORD*)(fs+8) - STACK_ADJUST;
TRACE("(%p)->(%ld)([%d bytes]) ret=%08lx\n", iface, index, bytes, *(DWORD*)(args+bytes));
return NdrClientCall2(This->stubless->pStubDesc, fs, args);
}
#else /* __i386__ */
/* can't do that on this arch */
struct StublessThunk { int dummy; };
#define FILL_STUBLESS(x,idx,stk) \
ERR("stubless proxies are not supported on this architecture\n");
#define STACK_ADJUST 0
#endif /* __i386__ */
HRESULT WINAPI StdProxy_Construct(REFIID riid,
LPUNKNOWN pUnkOuter,
const ProxyFileInfo *ProxyInfo,
int Index,
LPPSFACTORYBUFFER pPSFactory,
LPRPCPROXYBUFFER *ppProxy,
LPVOID *ppvObj)
{
StdProxyImpl *This;
const MIDL_STUBLESS_PROXY_INFO *stubless = NULL;
PCInterfaceName name = ProxyInfo->pNamesArray[Index];
CInterfaceProxyVtbl *vtbl = ProxyInfo->pProxyVtblList[Index];
TRACE("(%p,%p,%p,%p,%p) %s\n", pUnkOuter, vtbl, pPSFactory, ppProxy, ppvObj, name);
/* TableVersion = 2 means it is the stubless version of CInterfaceProxyVtbl */
if (ProxyInfo->TableVersion > 1) {
stubless = *(const void **)vtbl;
vtbl = (CInterfaceProxyVtbl *)((const void **)vtbl + 1);
TRACE("stubless=%p\n", stubless);
}
TRACE("iid=%s\n", debugstr_guid(vtbl->header.piid));
TRACE("vtbl=%p\n", vtbl->Vtbl);
if (!IsEqualGUID(vtbl->header.piid, riid)) {
ERR("IID mismatch during proxy creation\n");
return RPC_E_UNEXPECTED;
}
This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(StdProxyImpl));
if (!This) return E_OUTOFMEMORY;
if (stubless) {
CInterfaceStubVtbl *svtbl = ProxyInfo->pStubVtblList[Index];
unsigned long i, count = svtbl->header.DispatchTableCount;
/* Maybe the original vtbl is just modified directly to point at
* ObjectStublessClientXXX thunks in real Windows, but I don't like it
*/
TRACE("stubless thunks: count=%ld\n", count);
This->thunks = HeapAlloc(GetProcessHeap(),0,sizeof(struct StublessThunk)*count);
This->PVtbl = HeapAlloc(GetProcessHeap(),0,sizeof(LPVOID)*count);
for (i=0; i<count; i++) {
struct StublessThunk *thunk = &This->thunks[i];
if (vtbl->Vtbl[i] == (LPVOID)-1) {
PFORMAT_STRING fs = stubless->ProcFormatString + stubless->FormatStringOffset[i];
unsigned bytes = *(const WORD*)(fs+8) - STACK_ADJUST;
TRACE("method %ld: stacksize=%d\n", i, bytes);
FILL_STUBLESS(thunk, i, bytes)
This->PVtbl[i] = thunk;
}
else {
memset(thunk, 0, sizeof(struct StublessThunk));
This->PVtbl[i] = vtbl->Vtbl[i];
}
}
}
else
This->PVtbl = vtbl->Vtbl;
This->lpVtbl = &StdProxy_Vtbl;
/* one reference for the proxy */
This->RefCount = 1;
This->stubless = stubless;
This->piid = vtbl->header.piid;
This->pUnkOuter = pUnkOuter;
This->name = name;
This->pPSFactory = pPSFactory;
This->pChannel = NULL;
*ppProxy = (LPRPCPROXYBUFFER)&This->lpVtbl;
*ppvObj = &This->PVtbl;
/* if there is no outer unknown then the caller will control the lifetime
* of the proxy object through the proxy buffer, so no need to increment the
* ref count of the proxy object */
if (pUnkOuter)
IUnknown_AddRef((IUnknown *)*ppvObj);
IPSFactoryBuffer_AddRef(pPSFactory);
return S_OK;
}
static void WINAPI StdProxy_Destruct(LPRPCPROXYBUFFER iface)
{
ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
if (This->pChannel)
IRpcProxyBuffer_Disconnect(iface);
IPSFactoryBuffer_Release(This->pPSFactory);
if (This->thunks) {
HeapFree(GetProcessHeap(),0,This->PVtbl);
HeapFree(GetProcessHeap(),0,This->thunks);
}
HeapFree(GetProcessHeap(),0,This);
}
static HRESULT WINAPI StdProxy_QueryInterface(LPRPCPROXYBUFFER iface,
REFIID riid,
LPVOID *obj)
{
ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
if (IsEqualGUID(&IID_IUnknown,riid) ||
IsEqualGUID(This->piid,riid)) {
*obj = &This->PVtbl;
This->RefCount++;
return S_OK;
}
if (IsEqualGUID(&IID_IRpcProxyBuffer,riid)) {
*obj = &This->lpVtbl;
This->RefCount++;
return S_OK;
}
return E_NOINTERFACE;
}
static ULONG WINAPI StdProxy_AddRef(LPRPCPROXYBUFFER iface)
{
ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
TRACE("(%p)->AddRef()\n",This);
return ++(This->RefCount);
}
static ULONG WINAPI StdProxy_Release(LPRPCPROXYBUFFER iface)
{
ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
TRACE("(%p)->Release()\n",This);
if (!--(This->RefCount)) {
StdProxy_Destruct((LPRPCPROXYBUFFER)&This->lpVtbl);
return 0;
}
return This->RefCount;
}
static HRESULT WINAPI StdProxy_Connect(LPRPCPROXYBUFFER iface,
LPRPCCHANNELBUFFER pChannel)
{
ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
TRACE("(%p)->Connect(%p)\n",This,pChannel);
This->pChannel = pChannel;
IRpcChannelBuffer_AddRef(pChannel);
return S_OK;
}
static VOID WINAPI StdProxy_Disconnect(LPRPCPROXYBUFFER iface)
{
ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
TRACE("(%p)->Disconnect()\n",This);
IRpcChannelBuffer_Release(This->pChannel);
This->pChannel = NULL;
}
static const IRpcProxyBufferVtbl StdProxy_Vtbl =
{
StdProxy_QueryInterface,
StdProxy_AddRef,
StdProxy_Release,
StdProxy_Connect,
StdProxy_Disconnect
};
HRESULT WINAPI StdProxy_GetChannel(LPVOID iface,
LPRPCCHANNELBUFFER *ppChannel)
{
ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
TRACE("(%p)->GetChannel(%p) %s\n",This,ppChannel,This->name);
*ppChannel = This->pChannel;
return S_OK;
}
HRESULT WINAPI StdProxy_GetIID(LPVOID iface,
const IID **ppiid)
{
ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
TRACE("(%p)->GetIID(%p) %s\n",This,ppiid,This->name);
*ppiid = This->piid;
return S_OK;
}
HRESULT WINAPI IUnknown_QueryInterface_Proxy(LPUNKNOWN iface,
REFIID riid,
LPVOID *ppvObj)
{
ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
TRACE("(%p)->QueryInterface(%s,%p) %s\n",This,debugstr_guid(riid),ppvObj,This->name);
return IUnknown_QueryInterface(This->pUnkOuter,riid,ppvObj);
}
ULONG WINAPI IUnknown_AddRef_Proxy(LPUNKNOWN iface)
{
ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
TRACE("(%p)->AddRef() %s\n",This,This->name);
#if 0 /* interface refcounting */
return ++(This->RefCount);
#else /* object refcounting */
return IUnknown_AddRef(This->pUnkOuter);
#endif
}
ULONG WINAPI IUnknown_Release_Proxy(LPUNKNOWN iface)
{
ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
TRACE("(%p)->Release() %s\n",This,This->name);
#if 0 /* interface refcounting */
if (!--(This->RefCount)) {
StdProxy_Destruct((LPRPCPROXYBUFFER)&This->lpVtbl);
return 0;
}
return This->RefCount;
#else /* object refcounting */
return IUnknown_Release(This->pUnkOuter);
#endif
}
HRESULT WINAPI
CreateProxyFromTypeInfo( LPTYPEINFO pTypeInfo, LPUNKNOWN pUnkOuter, REFIID riid,
LPRPCPROXYBUFFER *ppProxy, LPVOID *ppv )
{
FIXME("%p %p %s %p %p\n", pTypeInfo, pUnkOuter, debugstr_guid(riid), ppProxy, ppv);
return E_NOTIMPL;
}
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