433 lines
12 KiB
C++
433 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*/
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#include "prprf.h"
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#include "prmem.h"
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#include "nsProxyEvent.h"
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#include "nsIProxyObjectManager.h"
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#include "nsProxyEventPrivate.h"
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#include "nsHashtable.h"
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#include "nsIInterfaceInfoManager.h"
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#include "xptcall.h"
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#include "nsAutoLock.h"
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static NS_DEFINE_IID(kProxyObject_Identity_Class_IID, NS_PROXYEVENT_IDENTITY_CLASS_IID);
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////////////////////////////////////////////////////////////////////////////////
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class nsProxyEventKey : public nsHashKey
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{
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public:
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nsProxyEventKey(void* rootObjectKey, void* destQueueKey, PRInt32 proxyType)
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: mRootObjectKey(rootObjectKey), mDestQueueKey(destQueueKey), mProxyType(proxyType) {
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}
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PRUint32 HashCode(void) const {
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// XXX what about 64-bit machines?
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return (PRUint32)mRootObjectKey ^ (PRUint32)mDestQueueKey ^ mProxyType;
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}
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PRBool Equals(const nsHashKey *aKey) const {
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const nsProxyEventKey* other = (const nsProxyEventKey*)aKey;
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return mRootObjectKey == other->mRootObjectKey
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&& mDestQueueKey == other->mDestQueueKey
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&& mProxyType == other->mProxyType;
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}
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nsHashKey *Clone() const {
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return new nsProxyEventKey(mRootObjectKey, mDestQueueKey, mProxyType);
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}
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protected:
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void* mRootObjectKey;
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void* mDestQueueKey;
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PRInt32 mProxyType;
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};
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////////////////////////////////////////////////////////////////////////////////
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#ifdef DEBUG_xpcom_proxy
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static PRMonitor* mon = nsnull;
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static PRUint32 totalProxyObjects = 0;
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static PRUint32 outstandingProxyObjects = 0;
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void
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nsProxyEventObject::DebugDump(const char * message, PRUint32 hashKey)
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{
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if (mon == nsnull)
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{
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mon = PR_NewMonitor();
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}
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PR_EnterMonitor(mon);
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if (message)
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{
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printf("\n-=-=-=-=-=-=-=-=-=-=-=-=-\n");
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printf("%s\n", message);
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if(strcmp(message, "Create") == 0)
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{
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totalProxyObjects++;
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outstandingProxyObjects++;
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}
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else if(strcmp(message, "Delete") == 0)
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{
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outstandingProxyObjects--;
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}
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}
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printf("nsProxyEventObject @ %x with mRefCnt = %d\n", this, mRefCnt);
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PRBool isRoot = mRoot == nsnull;
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printf("%s wrapper around @ %x\n", isRoot ? "ROOT":"non-root\n", GetRealObject());
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nsCOMPtr<nsISupports> rootObject = do_QueryInterface(mProxyObject->mRealObject);
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nsCOMPtr<nsISupports> rootQueue = do_QueryInterface(mProxyObject->mDestQueue);
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nsProxyEventKey key(rootObject, rootQueue, mProxyObject->mProxyType);
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printf("Hashkey: %d\n", key.HashCode());
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char* name;
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GetClass()->GetInterfaceInfo()->GetName(&name);
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printf("interface name is %s\n", name);
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if(name)
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nsMemory::Free(name);
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char * iid = GetClass()->GetProxiedIID().ToString();
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printf("IID number is %s\n", iid);
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delete iid;
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printf("nsProxyEventClass @ %x\n", mClass);
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if(mNext)
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{
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if(isRoot)
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{
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printf("Additional wrappers for this object...\n");
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}
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mNext->DebugDump(nsnull, 0);
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}
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printf("[proxyobjects] %d total used in system, %d outstading\n", totalProxyObjects, outstandingProxyObjects);
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if (message)
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printf("-=-=-=-=-=-=-=-=-=-=-=-=-\n");
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PR_ExitMonitor(mon);
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}
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#endif
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//////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// nsProxyEventObject
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//
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//////////////////////////////////////////////////////////////////////////////////////////////////
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nsProxyEventObject*
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nsProxyEventObject::GetNewOrUsedProxy(nsIEventQueue *destQueue,
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PRInt32 proxyType,
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nsISupports *aObj,
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REFNSIID aIID)
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{
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nsCOMPtr<nsProxyEventObject> proxy;
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nsCOMPtr<nsProxyEventObject> root;
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nsProxyEventObject* peo;
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// Get a class for this IID.
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nsCOMPtr<nsProxyEventClass> clazz = getter_AddRefs( nsProxyEventClass::GetNewOrUsedClass(aIID) );
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if(!clazz) return nsnull;
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// make sure that the object pass in is not a proxy.
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nsCOMPtr<nsProxyEventObject> aIdentificationObject;
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if (NS_SUCCEEDED(aObj->QueryInterface(kProxyObject_Identity_Class_IID, getter_AddRefs(aIdentificationObject))))
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{
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// someone is asking us to create a proxy for a proxy. Lets get
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// the real object and build aproxy for that!
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aObj = aIdentificationObject->GetRealObject();
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aIdentificationObject = 0;
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if (aObj == nsnull) return nsnull;
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}
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// always find the native root if the |real| object.
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// this must not be a nsCOMPtr since we need to make sure that we do a QI.
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nsCOMPtr<nsISupports> rootObject;
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if(NS_FAILED(aObj->QueryInterface(NS_GET_IID(nsISupports), getter_AddRefs(rootObject))))
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return nsnull;
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/* get our hash table */
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nsProxyObjectManager *manager = nsProxyObjectManager::GetInstance();
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if (manager == nsnull) return nsnull;
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nsHashtable *realToProxyMap = manager->GetRealObjectToProxyObjectMap();
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if (realToProxyMap == nsnull) return nsnull;
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// we need to do make sure that we addref the passed in object as well as ensure
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// that it is of the requested IID;
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// this must not be a nsCOMPtr since we need to make sure that we do a QI.
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nsCOMPtr<nsISupports> requestedInterface;
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if(NS_FAILED(aObj->QueryInterface(aIID, getter_AddRefs(requestedInterface))))
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return nsnull;
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// this will be our key in the hash table.
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// this must not be a nsCOMPtr since we need to make sure that we do a QI.
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nsCOMPtr<nsISupports> destQRoot;
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nsresult rv;
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destQRoot = do_QueryInterface(destQueue, &rv);
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if (NS_FAILED(rv))
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return nsnull;
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nsProxyEventKey rootkey(rootObject.get(), destQRoot.get(), proxyType);
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// find in our hash table
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root = (nsProxyEventObject*) realToProxyMap->Get(&rootkey);
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if(root)
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{
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proxy = root->Find(aIID);
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if(proxy)
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{
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peo = proxy;
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NS_ADDREF(peo);
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return peo;
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}
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}
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else
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{
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// build the root proxy
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if (aObj == rootObject.get())
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{
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// the root will do double duty as the interface wrapper
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peo = new nsProxyEventObject(destQueue,
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proxyType,
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requestedInterface,
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clazz,
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nsnull);
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proxy = do_QueryInterface(peo);
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if(proxy)
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{
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realToProxyMap->Put(&rootkey, peo);
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peo = proxy;
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NS_ADDREF(peo);
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return peo;
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}
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}
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else
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{
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// just a root proxy
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nsCOMPtr<nsProxyEventClass> rootClazz = getter_AddRefs ( nsProxyEventClass::GetNewOrUsedClass(
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NS_GET_IID(nsISupports)) );
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if (!rootClazz)
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{
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return nsnull;
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}
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peo = new nsProxyEventObject(destQueue,
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proxyType,
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rootObject,
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rootClazz,
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nsnull);
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if(!peo)
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{
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return nsnull;
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}
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root = do_QueryInterface(peo);
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realToProxyMap->Put(&rootkey, peo);
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}
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}
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// at this point we have a root and may need to build the specific proxy
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NS_ASSERTION(root,"bad root");
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NS_ASSERTION(clazz,"bad clazz");
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if(!proxy)
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{
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peo = new nsProxyEventObject(destQueue,
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proxyType,
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requestedInterface,
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clazz,
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root);
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proxy = do_QueryInterface(peo);
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if(!proxy)
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{
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return nsnull;
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}
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}
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proxy->mNext = root->mNext;
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root->mNext = proxy;
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peo = proxy;
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NS_ADDREF(peo);
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return peo;
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}
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nsProxyEventObject::nsProxyEventObject()
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: mNext(nsnull)
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{
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NS_WARNING("This constructor should never be called");
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}
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nsProxyEventObject::nsProxyEventObject(nsIEventQueue *destQueue,
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PRInt32 proxyType,
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nsISupports* aObj,
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nsProxyEventClass* aClass,
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nsProxyEventObject* root)
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: mClass(aClass),
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mRoot(root),
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mNext(nsnull)
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{
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NS_INIT_REFCNT();
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NS_IF_ADDREF(mRoot);
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mProxyObject = new nsProxyObject(destQueue, proxyType, aObj);
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#ifdef DEBUG_xpcom_proxy
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DebugDump("Create", 0);
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#endif
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}
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nsProxyEventObject::~nsProxyEventObject()
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{
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#ifdef DEBUG_xpcom_proxy
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DebugDump("Delete", 0);
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#endif
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if (mRoot != nsnull)
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{
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nsProxyEventObject* cur = mRoot;
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while(1)
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{
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if(cur->mNext == this)
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{
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cur->mNext = mNext;
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break;
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}
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cur = cur->mNext;
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NS_ASSERTION(cur, "failed to find wrapper in its own chain");
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}
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}
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else
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{
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if (! nsProxyObjectManager::IsManagerShutdown())
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{
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nsCOMPtr<nsProxyObjectManager> manager = nsProxyObjectManager::GetInstance();
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nsHashtable *realToProxyMap = manager->GetRealObjectToProxyObjectMap();
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if (realToProxyMap != nsnull)
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{
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nsCOMPtr<nsISupports> rootObject = do_QueryInterface(mProxyObject->mRealObject);
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nsCOMPtr<nsISupports> rootQueue = do_QueryInterface(mProxyObject->mDestQueue);
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nsProxyEventKey key(rootObject, rootQueue, mProxyObject->mProxyType);
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void* value = realToProxyMap->Remove(&key);
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NS_ASSERTION(value, "failed to remove from realToProxyMap");
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}
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}
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}
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// I am worried about ordering.
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// do not remove assignments.
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mProxyObject = 0;
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mClass = 0;
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NS_IF_RELEASE(mRoot);
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}
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NS_IMPL_THREADSAFE_ADDREF(nsProxyEventObject);
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NS_IMPL_THREADSAFE_RELEASE(nsProxyEventObject);
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NS_IMETHODIMP
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nsProxyEventObject::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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if( aIID.Equals(GetIID()) )
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{
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*aInstancePtr = (void*) ( (nsISupports*)this ); //todo should use standard cast.
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return mClass->DelegatedQueryInterface(this, aIID, aInstancePtr);
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}
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nsProxyEventObject*
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nsProxyEventObject::Find(REFNSIID aIID)
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{
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if(aIID.Equals(GetClass()->GetProxiedIID()))
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{
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return this;
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}
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if(aIID.Equals(NS_GET_IID(nsISupports)))
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{
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return this;
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}
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nsProxyEventObject* cur = (mRoot ? mRoot : this);
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do
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{
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if(aIID.Equals(GetClass()->GetProxiedIID()))
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{
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return cur;
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}
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} while(NULL != (cur = cur->mNext));
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return NULL;
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}
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NS_IMETHODIMP
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nsProxyEventObject::GetInterfaceInfo(nsIInterfaceInfo** info)
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{
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NS_ENSURE_ARG_POINTER(info);
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NS_ASSERTION(GetClass(), "proxy without class");
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NS_ASSERTION(GetClass()->GetInterfaceInfo(), "proxy class without interface");
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if(!(*info = GetClass()->GetInterfaceInfo()))
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return NS_ERROR_UNEXPECTED;
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NS_ADDREF(*info);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsProxyEventObject::CallMethod(PRUint16 methodIndex,
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const nsXPTMethodInfo* info,
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nsXPTCMiniVariant * params)
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{
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if (mProxyObject)
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return mProxyObject->Post(methodIndex, (nsXPTMethodInfo*)info, params, GetClass()->GetInterfaceInfo());
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return NS_ERROR_NULL_POINTER;
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}
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