Sweden-Number/dlls/ole32/stubmanager.c

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/*
* A stub manager is an object that controls interface stubs. It is
* identified by an OID (object identifier) and acts as the network
* identity of the object. There can be many stub managers in a
* process or apartment.
*
* Copyright 2002 Marcus Meissner
* Copyright 2004 Mike Hearn for CodeWeavers
*
* 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
*/
#define COBJMACROS
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include <assert.h>
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "objbase.h"
#include "ole2.h"
#include "ole2ver.h"
#include "rpc.h"
#include "wine/debug.h"
#include "compobj_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(ole);
struct stub_manager *new_stub_manager(APARTMENT *apt, IUnknown *object)
{
struct stub_manager *sm;
assert( apt );
sm = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(struct stub_manager));
if (!sm) return NULL;
list_init(&sm->ifstubs);
InitializeCriticalSection(&sm->lock);
IUnknown_AddRef(object);
sm->object = object;
sm->apt = apt;
EnterCriticalSection(&apt->cs);
sm->oid = apt->oidc++;
LeaveCriticalSection(&apt->cs);
/* yes, that's right, this starts at zero. that's zero EXTERNAL
* refs, ie nobody has unmarshalled anything yet. we can't have
* negative refs because the stub manager cannot be explicitly
* killed, it has to die by somebody unmarshalling then releasing
* the marshalled ifptr.
*/
sm->refcount = 0;
EnterCriticalSection(&apt->cs);
list_add_head(&apt->stubmgrs, &sm->entry);
LeaveCriticalSection(&apt->cs);
TRACE("Created new stub manager (oid=%s) at %p for object with IUnknown %p\n", wine_dbgstr_longlong(sm->oid), sm, object);
return sm;
}
struct stub_manager *get_stub_manager_from_object(OXID oxid, void *object)
{
struct stub_manager *result = NULL;
struct list *cursor;
APARTMENT *apt;
if (!(apt = COM_ApartmentFromOXID(oxid, TRUE)))
{
WARN("Could not map OXID %s to apartment object\n", wine_dbgstr_longlong(oxid));
return NULL;
}
EnterCriticalSection(&apt->cs);
LIST_FOR_EACH( cursor, &apt->stubmgrs )
{
struct stub_manager *m = LIST_ENTRY( cursor, struct stub_manager, entry );
if (m->object == object)
{
result = m;
break;
}
}
LeaveCriticalSection(&apt->cs);
COM_ApartmentRelease(apt);
TRACE("found %p from object %p\n", result, object);
return result;
}
struct stub_manager *get_stub_manager(OXID oxid, OID oid)
{
struct stub_manager *result = NULL;
struct list *cursor;
APARTMENT *apt;
if (!(apt = COM_ApartmentFromOXID(oxid, TRUE)))
{
WARN("Could not map OXID %s to apartment object\n", wine_dbgstr_longlong(oxid));
return NULL;
}
EnterCriticalSection(&apt->cs);
LIST_FOR_EACH( cursor, &apt->stubmgrs )
{
struct stub_manager *m = LIST_ENTRY( cursor, struct stub_manager, entry );
if (m->oid == oid)
{
result = m;
break;
}
}
LeaveCriticalSection(&apt->cs);
COM_ApartmentRelease(apt);
TRACE("found %p from oid %s\n", result, wine_dbgstr_longlong(oid));
return result;
}
/* add some external references (ie from a client that demarshalled an ifptr) */
int stub_manager_ref(struct stub_manager *m, int refs)
{
int rc = InterlockedExchangeAdd(&m->refcount, refs) + refs;
TRACE("added %d refs to %p (oid %s), rc is now %d\n", refs, m, wine_dbgstr_longlong(m->oid), rc);
return rc;
}
/* remove some external references */
int stub_manager_unref(struct stub_manager *m, int refs)
{
int rc = InterlockedExchangeAdd(&m->refcount, -refs) - refs;
TRACE("removed %d refs from %p (oid %s), rc is now %d\n", refs, m, wine_dbgstr_longlong(m->oid), rc);
if (rc == 0)
{
TRACE("destroying %p (oid=%s)\n", m, wine_dbgstr_longlong(m->oid));
EnterCriticalSection(&m->apt->cs);
list_remove(&m->entry);
LeaveCriticalSection(&m->apt->cs);
/* table strong and normal marshals have a ref on us, so we
* can't die while they are outstanding unless the app does
* something weird like explicitly killing us (how?)
*/
EnterCriticalSection(&m->lock);
if (!list_empty(&m->ifstubs))
{
ERR("PANIC: Stub manager %s is being destroyed with outstanding interface stubs\n", wine_dbgstr_longlong(m->oid));
/* assert( FALSE ); */
/* fixme: this will happen sometimes until we do proper lifecycle management via IRemUnknown */
}
/* fixme: the lifecycle of table-weak marshals is not
* currently understood. results of testing against dcom98
* appear to contradict Essential COM -m
*/
LeaveCriticalSection(&m->lock);
IUnknown_Release(m->object);
HeapFree(GetProcessHeap(), 0, m);
}
return refs;
}
static struct ifstub *stub_manager_ipid_to_ifstub(struct stub_manager *m, IPID *ipid)
{
struct list *cursor;
struct ifstub *result = NULL;
EnterCriticalSection(&m->lock);
LIST_FOR_EACH( cursor, &m->ifstubs )
{
struct ifstub *ifstub = LIST_ENTRY( cursor, struct ifstub, entry );
if (IsEqualGUID(ipid, &ifstub->ipid))
{
result = ifstub;
break;
}
}
LeaveCriticalSection(&m->lock);
return result;
}
IRpcStubBuffer *stub_manager_ipid_to_stubbuffer(struct stub_manager *m, IPID *ipid)
{
struct ifstub *ifstub = stub_manager_ipid_to_ifstub(m, ipid);
return ifstub ? ifstub->stubbuffer : NULL;
}
/* registers a new interface stub COM object with the stub manager and returns registration record */
struct ifstub *stub_manager_new_ifstub(struct stub_manager *m, IRpcStubBuffer *sb, IUnknown *iptr, REFIID iid, BOOL tablemarshal)
{
struct ifstub *stub;
TRACE("oid=%s, stubbuffer=%p, iptr=%p, iid=%s, tablemarshal=%s\n",
wine_dbgstr_longlong(m->oid), sb, iptr, debugstr_guid(iid), tablemarshal ? "TRUE" : "FALSE");
stub = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(struct ifstub));
if (!stub) return NULL;
stub->stubbuffer = sb;
IUnknown_AddRef(sb);
/* no need to ref this, same object as sb */
stub->iface = iptr;
stub->table = tablemarshal;
stub->iid = *iid;
stub->ipid = *iid; /* FIXME: should be globally unique */
EnterCriticalSection(&m->lock);
list_add_head(&m->ifstubs, &stub->entry);
LeaveCriticalSection(&m->lock);
return stub;
}
/* fixme: should ifstubs be refcounted? iid should be ipid */
void stub_manager_delete_ifstub(struct stub_manager *m, IPID *ipid)
{
struct ifstub *ifstub;
TRACE("m=%p, m->oid=%s, ipid=%s\n", m, wine_dbgstr_longlong(m->oid), debugstr_guid(ipid));
EnterCriticalSection(&m->lock);
if ((ifstub = stub_manager_ipid_to_ifstub(m, ipid)))
{
list_remove(&ifstub->entry);
IUnknown_Release(ifstub->stubbuffer);
IUnknown_Release(ifstub->iface);
HeapFree(GetProcessHeap(), 0, ifstub);
}
else
{
WARN("could not map ipid %s to ifstub\n", debugstr_guid(ipid));
}
LeaveCriticalSection(&m->lock);
}