author | hgs |
Tue, 20 Jul 2010 18:12:15 +0100 | |
changeset 50 | afebdb533a85 |
parent 22 | 592244873960 |
child 70 | b564fb5fd78b |
permissions | -rw-r--r-- |
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// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// |
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/** |
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@file |
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@internalComponent |
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*/ |
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#include <e32base.h> |
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#include <cfshared.h> |
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#include "sd_log.h" |
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#include "sd_roles.h" |
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#include "sd_msgs.h" |
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#include "sd_std.h" |
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#include "sd_errors.h" |
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|
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#ifdef _DEBUG |
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// Panic category for "absolutely impossible!" vanilla ASSERT()-type panics from this module |
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// (if it could happen through user error then you should give it an explicit, documented, category + code) |
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_LIT(KSpecAssert_ElemSvrDenPlayrC, "ElemSvrDenPlayrC"); |
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#endif |
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using namespace Den; |
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using namespace CommsFW; |
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|
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// |
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// CSockSessionProxy |
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// |
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EXPORT_C CCommonSessionProxy::CCommonSessionProxy(CWorkerSession* aSession, CCommonPlayer& aPlayer) |
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: iSession(aSession), |
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iPlayer(aPlayer), |
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iNumSubSessClosing(ELivingSession), |
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iSubSessionCloseThrottle(*this) |
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{ |
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//COMMONLOG((WorkerId(),KECommonBootingTag, _L8("CSockSessionProxy %08x:\tCSockSessionProxy(), iSockSession %08x"), this, iSession) ); |
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} |
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EXPORT_C CCommonSessionProxy::~CCommonSessionProxy() |
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{ |
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//LOG(ESockLog::Printf(KESockSessDetailTag, _L8("CSockSessionProxy %08x:\t~CSockSessionProxy(), iSockSession %08x"), this, iSockSession) ); |
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if(iLink.iNext) |
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{ |
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iLink.Deque(); |
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} |
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} |
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void CCommonSessionProxy::BeginSessionClose() |
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{ |
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COMMONLOG((Player().WorkerId(),KECommonBootingTag, _L8("CCommonSessionProxy %08x:\tBeginSessionClose(), iSockSession %08x"), this, iSession) ); |
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/* Only do something if the message is within the deadline and we're sure |
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the session pointer is safe to use */ |
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CCommonWorkerThread& worker = iPlayer.WorkerThread(); |
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worker.IncProlongBindingLife(); |
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__ASSERT_DEBUG(!IsClosing(), User::Panic(KSpecAssert_ElemSvrDenPlayrC, 1)); |
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iNumSubSessClosing = 1; // dummy subsession to prevent premature suicide during this close loop |
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DeleteSubSessionsWithThrottling(); |
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} |
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void CCommonSessionProxy::DeleteSubSessionsWithThrottling() |
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{ |
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// Why Throttle? The original scenario is a process which opens a large number of sockets (100 in the |
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// original case) and terminates without closing them, leaving BeginSessionClose() to clean them up. |
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// In addition, the worker in question (pdummy1) synchronously deletes subsessions (1) and uses a shared |
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// shared heap configuration (i.e. limited memory). As each deletion results in a message being sent |
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// (to an SCPR), and there is no opportunity to drain these due to the synchronous deletion, the transport |
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// queue overflows and cannot be grown resulting in a panic. So use a (*low* priority) active object to |
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// delete a limited number of subsessions per RunL(). |
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// |
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// (1) a call to DeleteMe() results in an immediate upcall to NotifySubSessionDestroyed(). |
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TInt count = KSubSessionThrottleSize; |
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// The object container is stored as a packed array, so working backwards through it avoids invalidating |
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// the iterator when removing entries (and as a bonus is more efficient) |
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CCommonPlayer::TSubSessionContainer& subSessions(iPlayer.SubSessions()); |
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for(TInt i = subSessions.Count() - 1; i >= 0; --i) |
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{ |
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CWorkerSubSession* subSession = subSessions[i]; |
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if(subSession->Session() == iSession) |
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{ |
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++iNumSubSessClosing; |
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if(!subSession->IsClosing()) |
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{ |
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subSession->DeleteMe(); |
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// Throttle the deletions as appropriate |
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if (--count <= 0) |
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{ |
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COMMONLOG((Player().WorkerId(),KECommonBootingTag, _L8("CCommonSessionProxy %08x:\tDeleteSubSessionBunch(): throttled subsession deletion"), this) ); |
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// Re-prime the one shot |
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iSubSessionCloseThrottle.Call(); |
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return; |
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} |
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} |
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} |
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} |
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NotifySubSessionDestroyed(); // all, done, remove the dummy subsession |
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} |
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EXPORT_C void CCommonSessionProxy::NotifySubSessionDestroyed() |
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{ |
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//COMMONLOG((Player().WorkerId(),KECommonBootintgTag, _L8("CCommonSessionProxy %08x:\tNotifySubSessionDestroyed(), iSockSession %08x"), this, iSession) ); |
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if(IsClosing() &&--iNumSubSessClosing <= 0) |
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{ |
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__ASSERT_DEBUG(iNumSubSessClosing == 0, User::Panic(KSpecAssert_ElemSvrDenPlayrC, 2)); |
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CCommonWorkerThread& worker = iPlayer.WorkerThread(); |
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worker.CompleteSessionClose(iSession); |
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delete this; |
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} |
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} |
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// |
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// CCommonSessionProxy::CSubSessionCloseThrottle |
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// |
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||
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CCommonSessionProxy::CSubSessionCloseThrottle::CSubSessionCloseThrottle(CCommonSessionProxy& aProxy) |
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: CAsyncOneShot(EPriorityLow), iProxy(aProxy) // This must be low priority! |
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{ |
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} |
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void CCommonSessionProxy::CSubSessionCloseThrottle::RunL() |
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{ |
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// Delete some more subsessions |
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iProxy.DeleteSubSessionsWithThrottling(); |
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} |
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// |
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// CCommonPlayer |
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// |
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/** |
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The Player destructor doesn't have much to do as a lot of the cleanup is done during the |
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normal shutdown routines. Here the Player merely deletes all sub-sessions it owns. |
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*/ |
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EXPORT_C CCommonPlayer::~CCommonPlayer() |
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{ |
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// The object container is stored as a packed array, so working backwards through it avoids invalidating |
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// the iterator when removing entries (and as a bonus is more efficient) |
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COMMONLOG((WorkerId(),KECommonBootingTag, _L8("CCommonPlayer::~CCommonPlayer()"))); |
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156 |
|
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for(TInt i = iSubSessions.Count() - 1; i >= 0; --i) |
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158 |
{ |
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CWorkerSubSession* subSession = iSubSessions[i]; |
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COMMONLOG((WorkerId(),KECommonBootingTag, _L8("-- destroying %08x"), subSession)); |
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subSession->DeleteMe(); |
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} |
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163 |
|
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// Subsessions belong to sessions and get removed when those close. The only time a Player should be going down |
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// with leftover subsessions is an immediate shutdown, else either a session wasn't destroyed properly or a subsession |
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// got leaked off it. We do this after the cleanup loop above so the ptrs are helpfully listed |
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__ASSERT_DEBUG((iSubSessions.Count() == 0 || PitBoss().TestImmediateShutdownPresent()), User::Panic(KSpecAssert_ElemSvrDenPlayrC, 3)); |
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168 |
|
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iSubSessions.ResetAndDestroy(); |
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} |
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171 |
|
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EXPORT_C CCommonPlayer::CCommonPlayer(CCommonWorkerThread* aOwnerThread, TPlayerRole aPlayerRole) |
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: iOwnerThread(aOwnerThread), |
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iPlayerRole(aPlayerRole) |
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{ |
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COMMONLOG((WorkerId(),KECommonBootingTag, _L8("CCommonPlayer::CCommonPlayer()"))); |
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iSessionProxies.SetOffset(CCommonSessionProxy::GetLinkOffset()); |
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} |
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179 |
|
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/** |
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MultiTool function to return the current session proxy for a session, but also to create it |
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if it doesn't exist. This avoids having the same pattern in multiple places where we first check |
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to see if it exists then creates it if not. |
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184 |
*/ |
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EXPORT_C CCommonSessionProxy* CCommonPlayer::CurrentSessionProxyL() |
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186 |
{ |
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if(!iCurrentSessionProxy) |
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188 |
{ |
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iCurrentSessionProxy = FindOrCreateSessionProxyL(Session()); |
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190 |
} |
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return iCurrentSessionProxy; |
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} |
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|
193 |
|
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CCommonSessionProxy* CCommonPlayer::FindOrCreateSessionProxyL(CWorkerSession* aSession) |
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195 |
{ |
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CCommonSessionProxy* proxy = FindSessionProxy(aSession); |
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if(proxy==NULL) |
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198 |
{ |
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// No existing proxy; create a new one and append to list |
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proxy = DoCreateSessionProxyL(aSession); |
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iSessionProxies.AddLast(*proxy); |
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202 |
} |
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return proxy; |
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204 |
} |
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205 |
|
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206 |
CCommonSessionProxy* CCommonPlayer::FindSessionProxy(CWorkerSession* aSession) |
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207 |
{ |
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TDblQueIter<CCommonSessionProxy> iter(iSessionProxies); |
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CCommonSessionProxy* proxy; |
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while((proxy = iter++) != NULL) |
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211 |
{ |
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if(proxy->Session() == aSession) |
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213 |
{ |
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break; |
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215 |
} |
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216 |
} |
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217 |
return proxy; |
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218 |
} |
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219 |
|
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220 |
/** |
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221 |
The Player can unbind from another worker thread if it doesn't have any sub-sessions |
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222 |
belonging to a session in the peer's Dealer and there are no interface cookies left registered |
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223 |
at all |
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224 |
*/ |
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TBool CCommonPlayer::CanUnbindFromWorker(TWorkerId aWorker) |
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226 |
{ |
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COMMONLOG((WorkerId(), KECommonBootingTag, _L8("CCommonPlayer::CanUnbindFromWorker(%d): %d subsess"), aWorker, iSubSessions.Count())); |
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228 |
|
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TInt regItfCount = WorkerThread().Transport()->RegisteredCount(); |
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TInt persistentItfCount = Messages::TlsGlobals::Get().PersistentItfCount(); |
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if(regItfCount > persistentItfCount) |
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232 |
{ |
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COMMONLOG((WorkerId(), KECommonBootingTag, _L8("-- can't; %d interfaces still registered (%d transient)"), regItfCount, regItfCount - persistentItfCount) ); |
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return EFalse; |
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} |
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236 |
|
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for(TInt idx = iSubSessions.Count() - 1; idx >= 0; --idx) |
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238 |
{ |
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const CWorkerSubSession* ss = iSubSessions[idx]; |
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COMMONLOG((WorkerId(),KECommonBootingTag, _L8("-- subsess %08x worker=%d"), ss, ss->Session()->WorkerId())); |
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if(ss->Session()->WorkerId() == aWorker) |
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242 |
{ |
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COMMONLOG((WorkerId(),KECommonBootingTag, _L8("-- can't; subsess %08x belongs to this peer"), ss) ); |
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return EFalse; |
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} |
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246 |
} |
22
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diff
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247 |
|
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248 |
if (!iSessionProxies.IsEmpty()) |
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249 |
{ |
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250 |
COMMONLOG((WorkerId(), KECommonBootingTag, _L8("-- can't; session proxies still present"))); |
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251 |
return EFalse; |
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252 |
} |
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diff
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|
253 |
|
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diff
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|
254 |
|
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255 |
return ETrue; |
0
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} |
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EXPORT_C void CCommonPlayer::MaybeSetPlayerShutdownComplete(TBool aForceShutdownNow) |
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{ |
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//A forced shutdown trumps all other considerations |
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TBool shutdownComplete = aForceShutdownNow |
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|| (SubSessions().Count() == 0 && iSessionProxies.IsEmpty() && IsPlayerShutdownComplete()); |
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COMMONLOG((WorkerId(), KECommonBootingTag, _L8("CPlayer::MaybeSetPlayerShutdownComplete(), shutdownComplete = %d [forced=%d, #subSess=%d]"), |
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shutdownComplete, aForceShutdownNow, SubSessions().Count())); |
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WorkerThread().SetPlayerShutdownComplete(shutdownComplete); |
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} |
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EXPORT_C CWorkerSubSession* CCommonPlayer::SubSession(const TSubSessionUniqueId& aSubSessionUniqueId) const |
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{ |
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__ASSERT_DEBUG(aSubSessionUniqueId!=0, User::Panic(KDenFaultPanic, ECommonBadSubSessionUniqueId)); |
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CWorkerSubSession* ss = NULL; |
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for (TInt i = iSubSessions.Count() - 1; i>=0 && ss==NULL ; i--) |
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{ |
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if (iSubSessions[i]->UniqueId()==aSubSessionUniqueId) |
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{ |
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ss = iSubSessions[i]; |
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} |
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} |
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return ss; |
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} |
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EXPORT_C void CCommonPlayer::ProcessMessageL(const RSafeMessage& aMessage, CWorkerSubSession* aSubSession) |
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{ |
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SetSession(static_cast<CWorkerSession*>(aMessage.Session())); |
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iCurrentSessionProxy = NULL; |
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Reset(); |
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iCurrentMessage = &aMessage; |
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DoProcessMessageL(aMessage,aSubSession); |
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} |
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|
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/** |
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Panic the client in response to an operation on an existing subsession, after |
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which the request mustn't be completed |
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*/ |
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void CCommonPlayer::PanicClient(CWorkerSubSession& /*aSubSession*/, TInt aPanic) |
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{ |
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SafeMessage().PanicClient(KDenFaultPanic, aPanic); |
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DontCompleteCurrentRequest(); |
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} |
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|
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/** |
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Panic the client in response to an operation on an existing subsession, after |
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which the request mustn't be completed |
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|
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This version allows panic categories to be passed in to support expected legacy |
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behaviour. |
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*/ |
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void CCommonPlayer::PanicClient(CWorkerSubSession& /*aSubSession*/, const TDesC &aCategory, TInt aPanic) |
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{ |
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SafeMessage().PanicClient(aCategory, aPanic); |
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DontCompleteCurrentRequest(); |
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} |
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|
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EXPORT_C void CCommonPlayer::PanicClient(TInt aPanic) |
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{ |
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SafeMessage().PanicClient(KDenFaultPanic, aPanic); |
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DontCompleteCurrentRequest(); |
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} |
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|
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EXPORT_C void CCommonPlayer::PanicClient(const TDesC& aCategory, TInt aPanic) |
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{ |
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SafeMessage().PanicClient(aCategory, aPanic); |
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DontCompleteCurrentRequest(); |
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} |
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|
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EXPORT_C void CCommonPlayer::DontCompleteCurrentRequest() |
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{ |
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iComplete=EFalse; |
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} |
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|
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EXPORT_C TBool CCommonPlayer::ShouldCompleteCurrentRequest() const |
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{ |
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return iComplete; |
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} |
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|
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EXPORT_C void CCommonPlayer::SetReturn(TInt aReturn/*, TInt anError, TUid anOwner*/) |
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{ |
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iReturn=aReturn; |
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|
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} |
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|
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/** |
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Remove all subsessions belonging to sessions of the nominated worker. No locks required; only the |
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Player accesses the object container. |
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@see TWorkerMsg::ECleanupDeadPeer |
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*/ |
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EXPORT_C void CCommonPlayer::CleanupDeadWorker(TWorkerId aWorkerId) |
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{ |
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(void)aWorkerId; |
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//TBDAA - it's in ss_glob.h ASSERT_HOME_THREAD; |
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|
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// The object container is stored as a packed array, so working backwards through it avoids invalidating |
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// the iterator when removing entries (and as a bonus is more efficient) |
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for(TInt i = iSubSessions.Count() - 1; i >= 0; --i) |
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{ |
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iSubSessions[i]->CleanupDeadWorker(aWorkerId); |
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} |
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} |
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/** |
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If an incoming shutdown request is of type EImmediate, informs the |
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Worker Thread that Player shutdown is complete, otherwise do nothing here. |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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*/ |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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void CCommonPlayer::ProcessShutdownRequest(TCFShutdownType aType) |
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{ |
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COMMONLOG((WorkerId(),KECommonBootingTag, _L8("CPlayer::ProcessShutdownRequest(%d)"), aType)); |
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WorkerThread().SetPlayerShutdownComplete(aType == CommsFW::EImmediate); |
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} |
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371 |
|
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/** |
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Walk through all of the subsessions, telling each to complete all blocked requests |
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with KErrServerAbort. We don't attempt to free them - although with a shared |
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Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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heap this could reduce the amount of leakage it seems likely that the more we do |
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with these data structures, the greater the risk that the contagion spreads to |
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other users of the heap. Clients that attempt almost any further operation after KErrAbort |
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will get panicked by the Dealer in the usual bad handle way - this is harsh but fair, and |
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better than simply leaving them hung. |
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*/ |
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TInt CCommonPlayer::PostMortemCleanup() |
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{ |
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// No locks are required - we're only here because the owner has died |
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for(TInt i = 0; i < iSubSessions.Count(); ++i) |
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{ |
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CWorkerSubSession* subSession = static_cast<CWorkerSubSession*>((iSubSessions[i])); |
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subSession->FinalCompleteAllBlockedMessages(KErrAbort); |
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} |
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return KErrNone; |
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} |
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391 |