2007-03-22 10:30:00 -07:00
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All 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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* Benjamin Smedberg <benjamin@smedbergs.us>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "prprf.h"
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#include "prmem.h"
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#include "nscore.h"
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#include "nsProxyEventPrivate.h"
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#include "nsIThreadInternal.h"
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#include "nsServiceManagerUtils.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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nsProxyEventObject::nsProxyEventObject(nsProxyObject *aParent,
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nsProxyEventClass* aClass,
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already_AddRefed<nsISomeInterface> aRealInterface,
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nsresult *rv)
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2007-05-25 04:18:18 -07:00
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: mClass(aClass),
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2007-03-22 10:30:00 -07:00
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mProxyObject(aParent),
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mRealInterface(aRealInterface),
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2007-03-22 10:30:00 -07:00
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mNext(nsnull)
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{
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*rv = InitStub(aClass->GetProxiedIID());
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}
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nsProxyEventObject::~nsProxyEventObject()
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{
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2007-08-16 13:51:50 -07:00
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// This destructor must *not* be called within the POM lock
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2007-03-22 10:30:00 -07:00
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// XXX assert this!
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2007-05-25 04:18:18 -07:00
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// mRealInterface must be released before mProxyObject so that the last
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// release of the proxied object is proxied to the correct thread.
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// See bug 337492.
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mRealInterface = nsnull;
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2007-03-22 10:30:00 -07:00
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}
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//
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// nsISupports implementation...
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//
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2007-08-16 13:51:50 -07:00
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NS_IMETHODIMP_(nsrefcnt)
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nsProxyEventObject::AddRef()
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{
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nsAutoLock lock(nsProxyObjectManager::GetInstance()->GetLock());
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return LockedAddRef();
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}
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nsrefcnt
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nsProxyEventObject::LockedAddRef()
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{
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++mRefCnt;
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NS_LOG_ADDREF(this, mRefCnt, "nsProxyEventObject", sizeof(nsProxyEventObject));
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return mRefCnt;
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}
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NS_IMETHODIMP_(nsrefcnt)
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nsProxyEventObject::Release(void)
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{
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{
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nsAutoLock lock(nsProxyObjectManager::GetInstance()->GetLock());
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NS_PRECONDITION(0 != mRefCnt, "dup release");
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--mRefCnt;
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NS_LOG_RELEASE(this, mRefCnt, "nsProxyEventObject");
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if (mRefCnt)
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return mRefCnt;
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mProxyObject->LockedRemove(this);
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}
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// call the destructor outside of the lock so that we aren't holding the
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// lock when we release the object
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NS_DELETEXPCOM(this);
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return 0;
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}
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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(GetClass()->GetProxiedIID()) )
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{
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*aInstancePtr = static_cast<nsISupports*>(mXPTCStub);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return mProxyObject->QueryInterface(aIID, aInstancePtr);
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}
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//
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// nsXPTCStubBase implementation...
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//
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nsresult
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nsProxyEventObject::convertMiniVariantToVariant(const XPTMethodDescriptor *methodInfo,
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nsXPTCMiniVariant * params,
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nsXPTCVariant **fullParam,
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uint8 *outParamCount)
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{
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uint8 paramCount = methodInfo->num_args;
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*outParamCount = paramCount;
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*fullParam = nsnull;
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if (!paramCount) return NS_OK;
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*fullParam = (nsXPTCVariant*)malloc(sizeof(nsXPTCVariant) * paramCount);
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if (*fullParam == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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for (int i = 0; i < paramCount; i++)
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{
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const nsXPTParamInfo& paramInfo = methodInfo->params[i];
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if ((GetProxyType() & NS_PROXY_ASYNC) &&
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(paramInfo.IsOut() || paramInfo.IsDipper()))
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{
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NS_WARNING("Async proxying of out parameters is not supported");
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free(*fullParam);
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return NS_ERROR_PROXY_INVALID_OUT_PARAMETER;
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}
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uint8 flags = paramInfo.IsOut() ? nsXPTCVariant::PTR_IS_DATA : 0;
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(*fullParam)[i].Init(params[i], paramInfo.GetType(), flags);
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}
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return NS_OK;
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}
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class nsProxyThreadFilter : public nsIThreadEventFilter
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSITHREADEVENTFILTER
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};
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NS_IMPL_THREADSAFE_ISUPPORTS1(nsProxyThreadFilter, nsIThreadEventFilter)
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NS_DEFINE_IID(kFilterIID, NS_PROXYEVENT_FILTER_IID);
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NS_IMETHODIMP_(PRBool)
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nsProxyThreadFilter::AcceptEvent(nsIRunnable *event)
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{
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PROXY_LOG(("PROXY(%p): filter event [%p]\n", this, event));
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// If we encounter one of our proxy events that is for a synchronous method
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// call, then we want to put it in our event queue for processing. Else,
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// we want to allow the event to be dispatched to the thread's event queue
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// for processing later once we complete the current sync method call.
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nsRefPtr<nsProxyObjectCallInfo> poci;
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event->QueryInterface(kFilterIID, getter_AddRefs(poci));
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return poci && poci->IsSync();
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}
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NS_IMETHODIMP
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nsProxyEventObject::CallMethod(PRUint16 methodIndex,
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const XPTMethodDescriptor* methodInfo,
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nsXPTCMiniVariant * params)
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{
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NS_ASSERTION(methodIndex > 2,
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"Calling QI/AddRef/Release through CallMethod");
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nsresult rv;
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if (XPT_MD_IS_NOTXPCOM(methodInfo->flags))
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return NS_ERROR_PROXY_INVALID_IN_PARAMETER;
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nsXPTCVariant *fullParam;
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uint8 paramCount;
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rv = convertMiniVariantToVariant(methodInfo, params,
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&fullParam, ¶mCount);
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if (NS_FAILED(rv))
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return rv;
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PRBool callDirectly = PR_FALSE;
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if (GetProxyType() & NS_PROXY_SYNC &&
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NS_SUCCEEDED(GetTarget()->IsOnCurrentThread(&callDirectly)) &&
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callDirectly) {
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// invoke directly using xptc
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rv = NS_InvokeByIndex(mRealInterface, methodIndex,
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paramCount, fullParam);
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if (fullParam)
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free(fullParam);
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return rv;
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}
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nsRefPtr<nsProxyObjectCallInfo> proxyInfo =
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new nsProxyObjectCallInfo(this, methodInfo, methodIndex,
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fullParam, paramCount);
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if (!proxyInfo)
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return NS_ERROR_OUT_OF_MEMORY;
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if (! (GetProxyType() & NS_PROXY_SYNC)) {
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return GetTarget()->Dispatch(proxyInfo, NS_DISPATCH_NORMAL);
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}
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// Post synchronously
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nsIThread *thread = NS_GetCurrentThread();
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nsCOMPtr<nsIThreadInternal> threadInt = do_QueryInterface(thread);
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NS_ENSURE_STATE(threadInt);
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// Install thread filter to limit event processing only to
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// nsProxyObjectCallInfo instances. XXX Add support for sequencing?
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nsRefPtr<nsProxyThreadFilter> filter = new nsProxyThreadFilter();
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if (!filter)
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return NS_ERROR_OUT_OF_MEMORY;
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threadInt->PushEventQueue(filter);
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proxyInfo->SetCallersTarget(thread);
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// Dispatch can fail if the thread is shutting down
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rv = GetTarget()->Dispatch(proxyInfo, NS_DISPATCH_NORMAL);
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if (NS_SUCCEEDED(rv)) {
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while (!proxyInfo->GetCompleted()) {
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if (!NS_ProcessNextEvent(thread)) {
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rv = NS_ERROR_UNEXPECTED;
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break;
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}
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}
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rv = proxyInfo->GetResult();
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} else {
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NS_WARNING("Failed to dispatch nsProxyCallEvent");
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}
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threadInt->PopEventQueue();
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PROXY_LOG(("PROXY(%p): PostAndWait exit [%p %x]\n", this, proxyInfo.get(), rv));
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return rv;
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}
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