316 lines
9.4 KiB
C++
316 lines
9.4 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): Doug Turner <dougt@netscape.com> (Original Author)
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* Judson Valeski <valeski@netscape.com>
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* Dan Matejka <danm@netscape.com>
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* Scott Collins <scc@netscape.com>
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* Heikki Toivonen <heiki@citec.fi>
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* Patrick Beard <beard@netscape.com>
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* Pierre Phaneuf <pp@ludusdesign.com>
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* Warren Harris <warren@netscape.com>
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* Chris Seawood <cls@seawood.org>
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* Chris Waterson <waterson@netscape.com>
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* Dan Mosedale <dmose@netscape.com>
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*/
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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 "nsIProxyCreateInstance.h"
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#include "nsRepository.h"
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#include "nsIServiceManager.h"
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#include "nsCOMPtr.h"
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#include "nsIEventQueueService.h"
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#include "nsIThread.h"
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static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
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/***************************************************************************/
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/* nsProxyCreateInstance */
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/* This private class will allow us to create Instances on another thread */
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/***************************************************************************/
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class nsProxyCreateInstance : public nsIProxyCreateInstance
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{
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NS_DECL_ISUPPORTS
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NS_IMETHOD CreateInstanceByIID(const nsIID & cid, nsISupports *aOuter, const nsIID & iid, void * *result);
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NS_IMETHOD CreateInstanceByContractID(const char *aContractID, nsISupports *aOuter, const nsIID & iid, void * *result);
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nsProxyCreateInstance();
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virtual ~nsProxyCreateInstance();
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};
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nsProxyCreateInstance::nsProxyCreateInstance()
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{
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NS_INIT_REFCNT();
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NS_ADDREF_THIS();
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}
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nsProxyCreateInstance::~nsProxyCreateInstance()
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{
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}
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NS_IMPL_ISUPPORTS1(nsProxyCreateInstance, nsIProxyCreateInstance)
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NS_IMETHODIMP nsProxyCreateInstance::CreateInstanceByIID(const nsIID & cid, nsISupports *aOuter, const nsIID & iid, void * *result)
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{
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return nsComponentManager::CreateInstance( cid,
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aOuter,
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iid,
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result);
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}
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NS_IMETHODIMP nsProxyCreateInstance::CreateInstanceByContractID(const char *aContractID, nsISupports *aOuter, const nsIID & iid, void * *result)
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{
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return nsComponentManager::CreateInstance( aContractID,
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aOuter,
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iid,
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result);
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}
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/////////////////////////////////////////////////////////////////////////
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// nsProxyObjectManager
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/////////////////////////////////////////////////////////////////////////
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nsProxyObjectManager* nsProxyObjectManager::mInstance = nsnull;
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NS_IMPL_THREADSAFE_ISUPPORTS1(nsProxyObjectManager, nsIProxyObjectManager)
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nsProxyObjectManager::nsProxyObjectManager()
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{
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NS_INIT_REFCNT();
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mProxyClassMap = new nsHashtable(256, PR_TRUE);
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mProxyObjectMap = new nsHashtable(256, PR_TRUE);
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mProxyCreationMonitor = PR_NewMonitor();
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}
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static PRBool PurgeProxyClasses(nsHashKey *aKey, void *aData, void* closure)
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{
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nsProxyEventClass* ptr = NS_REINTERPRET_CAST(nsProxyEventClass*, aData);
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NS_RELEASE(ptr);
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return PR_TRUE;
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}
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nsProxyObjectManager::~nsProxyObjectManager()
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{
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if (mProxyClassMap)
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{
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mProxyClassMap->Reset((nsHashtableEnumFunc)PurgeProxyClasses, nsnull);
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delete mProxyClassMap;
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}
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delete mProxyObjectMap;
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if (mProxyCreationMonitor) {
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PR_DestroyMonitor(mProxyCreationMonitor);
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}
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nsProxyObjectManager::mInstance = nsnull;
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}
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PRBool
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nsProxyObjectManager::IsManagerShutdown()
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{
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if (mInstance)
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return PR_FALSE;
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return PR_TRUE;
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}
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nsProxyObjectManager *
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nsProxyObjectManager::GetInstance()
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{
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if (! mInstance)
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{
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mInstance = new nsProxyObjectManager();
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}
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return mInstance;
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}
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// Helpers
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NS_IMETHODIMP
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nsProxyObjectManager::Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr)
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{
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nsProxyObjectManager *proxyObjectManager = GetInstance();
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if (proxyObjectManager == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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return proxyObjectManager->QueryInterface(aIID, aInstancePtr);
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}
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NS_IMETHODIMP
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nsProxyObjectManager::GetProxyForObject(nsIEventQueue *destQueue,
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REFNSIID aIID,
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nsISupports* aObj,
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PRInt32 proxyType,
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void** aProxyObject)
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{
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if (!aObj) return NS_ERROR_NULL_POINTER;
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if (!aProxyObject) return NS_ERROR_NULL_POINTER;
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nsresult rv;
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nsCOMPtr<nsIEventQueue> postQ;
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*aProxyObject = nsnull;
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// check to see if the destination Q is a special case.
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nsCOMPtr<nsIEventQueueService> eventQService =
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do_GetService(kEventQueueServiceCID, &rv);
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if (NS_FAILED(rv))
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return rv;
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rv = eventQService->ResolveEventQueue(destQueue, getter_AddRefs(postQ));
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if (NS_FAILED(rv))
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return rv;
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// check to see if the eventQ is on our thread. If so, just return the real object.
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if (postQ && !(proxyType & PROXY_ASYNC) && !(proxyType & PROXY_ALWAYS))
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{
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PRBool aResult;
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postQ->IsQueueOnCurrentThread(&aResult);
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if (aResult)
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{
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return aObj->QueryInterface(aIID, aProxyObject);
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}
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}
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// check to see if proxy is there or not.
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*aProxyObject = nsProxyEventObject::GetNewOrUsedProxy(postQ, proxyType, aObj, aIID);
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if (*aProxyObject == nsnull)
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return NS_ERROR_NO_INTERFACE; //fix error code?
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return NS_OK;
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}
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NS_IMETHODIMP
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nsProxyObjectManager::GetProxy( nsIEventQueue *destQueue,
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const nsCID &aClass,
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nsISupports *aDelegate,
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const nsIID &aIID,
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PRInt32 proxyType,
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void** aProxyObject)
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{
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if (!aProxyObject) return NS_ERROR_NULL_POINTER;
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*aProxyObject = nsnull;
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// 1. Create a proxy for creating an instance on another thread.
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nsIProxyCreateInstance* ciProxy = nsnull;
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nsProxyCreateInstance* ciObject = new nsProxyCreateInstance();
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if (ciObject == nsnull)
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return NS_ERROR_NULL_POINTER;
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nsresult rv = GetProxyForObject(destQueue,
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NS_GET_IID(nsIProxyCreateInstance),
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ciObject,
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PROXY_SYNC,
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(void**)&ciProxy);
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if (NS_FAILED(rv))
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{
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delete ciObject;
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return rv;
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}
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// 2. now create a new instance of the request object via our proxy.
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nsISupports* aObj;
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rv = ciProxy->CreateInstanceByIID(aClass,
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aDelegate,
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aIID,
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(void**)&aObj);
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// 3. Delete the create instance proxy and its real object.
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NS_RELEASE(ciProxy);
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delete ciObject;
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ciObject = nsnull;
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// 4. Check to see if creating the requested instance failed.
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if ( NS_FAILED(rv))
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{
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return rv;
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}
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// 5. Now create a proxy object for the requested object.
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rv = GetProxyForObject(destQueue, aIID, aObj, proxyType, aProxyObject);
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// 6. release ownership of aObj so that aProxyObject owns it.
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NS_RELEASE(aObj);
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// 7. return the error returned from GetProxyForObject. Either way, we our out of here.
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return rv;
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}
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/**
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* Helper function for code that already has a link-time dependency on
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* libxpcom and needs to get proxies in a bunch of different places.
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* This way, the caller isn't forced to get the proxy object manager
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* themselves every single time, thus making the calling code more
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* readable.
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*/
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NS_COM nsresult
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NS_GetProxyForObject(nsIEventQueue *destQueue,
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REFNSIID aIID,
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nsISupports* aObj,
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PRInt32 proxyType,
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void** aProxyObject)
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{
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static NS_DEFINE_CID(proxyObjMgrCID, NS_PROXYEVENT_MANAGER_CID);
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nsresult rv; // temp for return value
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// get the proxy object manager
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//
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nsCOMPtr<nsIProxyObjectManager> proxyObjMgr =
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do_GetService(proxyObjMgrCID, &rv);
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if (NS_FAILED(rv))
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return NS_ERROR_FAILURE;
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// and try to get the proxy object
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//
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return proxyObjMgr->GetProxyForObject(destQueue, aIID, aObj,
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proxyType, aProxyObject);
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}
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