275 lines
8.0 KiB
C
275 lines
8.0 KiB
C
/*
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* A stub manager is an object that controls interface stubs. It is
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* identified by an OID (object identifier) and acts as the network
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* identity of the object. There can be many stub managers in a
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* process or apartment.
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*
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* Copyright 2002 Marcus Meissner
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* Copyright 2004 Mike Hearn for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define COBJMACROS
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#define NONAMELESSUNION
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#define NONAMELESSSTRUCT
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#include <assert.h>
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winuser.h"
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#include "objbase.h"
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#include "ole2.h"
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#include "ole2ver.h"
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#include "rpc.h"
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#include "wine/debug.h"
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#include "compobj_private.h"
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WINE_DEFAULT_DEBUG_CHANNEL(ole);
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struct stub_manager *new_stub_manager(APARTMENT *apt, IUnknown *object)
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{
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struct stub_manager *sm;
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assert( apt );
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sm = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(struct stub_manager));
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if (!sm) return NULL;
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list_init(&sm->ifstubs);
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InitializeCriticalSection(&sm->lock);
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IUnknown_AddRef(object);
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sm->object = object;
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sm->apt = apt;
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EnterCriticalSection(&apt->cs);
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sm->oid = apt->oidc++;
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LeaveCriticalSection(&apt->cs);
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/* yes, that's right, this starts at zero. that's zero EXTERNAL
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* refs, ie nobody has unmarshalled anything yet. we can't have
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* negative refs because the stub manager cannot be explicitly
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* killed, it has to die by somebody unmarshalling then releasing
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* the marshalled ifptr.
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*/
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sm->refcount = 0;
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EnterCriticalSection(&apt->cs);
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list_add_head(&apt->stubmgrs, &sm->entry);
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LeaveCriticalSection(&apt->cs);
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TRACE("Created new stub manager (oid=%s) at %p for object with IUnknown %p\n", wine_dbgstr_longlong(sm->oid), sm, object);
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return sm;
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}
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struct stub_manager *get_stub_manager_from_object(OXID oxid, void *object)
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{
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struct stub_manager *result = NULL;
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struct list *cursor;
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APARTMENT *apt;
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if (!(apt = COM_ApartmentFromOXID(oxid, TRUE)))
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{
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WARN("Could not map OXID %s to apartment object\n", wine_dbgstr_longlong(oxid));
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return NULL;
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}
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EnterCriticalSection(&apt->cs);
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LIST_FOR_EACH( cursor, &apt->stubmgrs )
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{
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struct stub_manager *m = LIST_ENTRY( cursor, struct stub_manager, entry );
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if (m->object == object)
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{
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result = m;
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break;
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}
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}
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LeaveCriticalSection(&apt->cs);
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COM_ApartmentRelease(apt);
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TRACE("found %p from object %p\n", result, object);
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return result;
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}
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struct stub_manager *get_stub_manager(OXID oxid, OID oid)
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{
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struct stub_manager *result = NULL;
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struct list *cursor;
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APARTMENT *apt;
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if (!(apt = COM_ApartmentFromOXID(oxid, TRUE)))
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{
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WARN("Could not map OXID %s to apartment object\n", wine_dbgstr_longlong(oxid));
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return NULL;
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}
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EnterCriticalSection(&apt->cs);
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LIST_FOR_EACH( cursor, &apt->stubmgrs )
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{
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struct stub_manager *m = LIST_ENTRY( cursor, struct stub_manager, entry );
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if (m->oid == oid)
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{
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result = m;
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break;
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}
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}
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LeaveCriticalSection(&apt->cs);
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COM_ApartmentRelease(apt);
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TRACE("found %p from oid %s\n", result, wine_dbgstr_longlong(oid));
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return result;
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}
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/* add some external references (ie from a client that demarshalled an ifptr) */
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int stub_manager_ref(struct stub_manager *m, int refs)
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{
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int rc = InterlockedExchangeAdd(&m->refcount, refs) + refs;
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TRACE("added %d refs to %p (oid %s), rc is now %d\n", refs, m, wine_dbgstr_longlong(m->oid), rc);
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return rc;
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}
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/* remove some external references */
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int stub_manager_unref(struct stub_manager *m, int refs)
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{
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int rc = InterlockedExchangeAdd(&m->refcount, -refs) - refs;
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TRACE("removed %d refs from %p (oid %s), rc is now %d\n", refs, m, wine_dbgstr_longlong(m->oid), rc);
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if (rc == 0)
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{
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TRACE("destroying %p (oid=%s)\n", m, wine_dbgstr_longlong(m->oid));
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EnterCriticalSection(&m->apt->cs);
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list_remove(&m->entry);
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LeaveCriticalSection(&m->apt->cs);
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/* table strong and normal marshals have a ref on us, so we
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* can't die while they are outstanding unless the app does
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* something weird like explicitly killing us (how?)
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*/
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EnterCriticalSection(&m->lock);
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if (!list_empty(&m->ifstubs))
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{
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ERR("PANIC: Stub manager %s is being destroyed with outstanding interface stubs\n", wine_dbgstr_longlong(m->oid));
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/* assert( FALSE ); */
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/* fixme: this will happen sometimes until we do proper lifecycle management via IRemUnknown */
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}
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/* fixme: the lifecycle of table-weak marshals is not
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* currently understood. results of testing against dcom98
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* appear to contradict Essential COM -m
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*/
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LeaveCriticalSection(&m->lock);
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IUnknown_Release(m->object);
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HeapFree(GetProcessHeap(), 0, m);
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}
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return refs;
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}
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static struct ifstub *stub_manager_ipid_to_ifstub(struct stub_manager *m, IPID *ipid)
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{
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struct list *cursor;
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struct ifstub *result = NULL;
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EnterCriticalSection(&m->lock);
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LIST_FOR_EACH( cursor, &m->ifstubs )
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{
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struct ifstub *ifstub = LIST_ENTRY( cursor, struct ifstub, entry );
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if (IsEqualGUID(ipid, &ifstub->ipid))
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{
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result = ifstub;
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break;
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}
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}
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LeaveCriticalSection(&m->lock);
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return result;
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}
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IRpcStubBuffer *stub_manager_ipid_to_stubbuffer(struct stub_manager *m, IPID *ipid)
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{
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struct ifstub *ifstub = stub_manager_ipid_to_ifstub(m, ipid);
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return ifstub ? ifstub->stubbuffer : NULL;
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}
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/* registers a new interface stub COM object with the stub manager and returns registration record */
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struct ifstub *stub_manager_new_ifstub(struct stub_manager *m, IRpcStubBuffer *sb, IUnknown *iptr, REFIID iid, BOOL tablemarshal)
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{
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struct ifstub *stub;
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TRACE("oid=%s, stubbuffer=%p, iptr=%p, iid=%s, tablemarshal=%s\n",
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wine_dbgstr_longlong(m->oid), sb, iptr, debugstr_guid(iid), tablemarshal ? "TRUE" : "FALSE");
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stub = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(struct ifstub));
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if (!stub) return NULL;
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stub->stubbuffer = sb;
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IUnknown_AddRef(sb);
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/* no need to ref this, same object as sb */
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stub->iface = iptr;
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stub->table = tablemarshal;
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stub->iid = *iid;
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stub->ipid = *iid; /* FIXME: should be globally unique */
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EnterCriticalSection(&m->lock);
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list_add_head(&m->ifstubs, &stub->entry);
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LeaveCriticalSection(&m->lock);
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return stub;
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}
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/* fixme: should ifstubs be refcounted? iid should be ipid */
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void stub_manager_delete_ifstub(struct stub_manager *m, IPID *ipid)
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{
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struct ifstub *ifstub;
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TRACE("m=%p, m->oid=%s, ipid=%s\n", m, wine_dbgstr_longlong(m->oid), debugstr_guid(ipid));
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EnterCriticalSection(&m->lock);
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if ((ifstub = stub_manager_ipid_to_ifstub(m, ipid)))
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{
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list_remove(&ifstub->entry);
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IUnknown_Release(ifstub->stubbuffer);
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IUnknown_Release(ifstub->iface);
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HeapFree(GetProcessHeap(), 0, ifstub);
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}
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else
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{
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WARN("could not map ipid %s to ifstub\n", debugstr_guid(ipid));
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}
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LeaveCriticalSection(&m->lock);
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}
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