1 files changed, 444 insertions, 0 deletions
diff --git a/chart2/source/tools/LifeTime.cxx b/chart2/source/tools/LifeTime.cxx
new file mode 100644
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+++ b/chart2/source/tools/LifeTime.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <LifeTime.hxx>
+#include <osl/diagnose.h>
+
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/util/CloseVetoException.hpp>
+#include <com/sun/star/util/XCloseListener.hpp>
+#include <com/sun/star/util/XCloseable.hpp>
+#include <tools/diagnose_ex.h>
+#include <sal/log.hxx>
+
+using namespace ::com::sun::star;
+
+namespace apphelper
+{
+
+LifeTimeManager::LifeTimeManager( lang::XComponent* pComponent )
+    : m_aListenerContainer( m_aAccessMutex )
+    , m_pComponent(pComponent)
+{
+    m_bDisposed = false;
+    m_bInDispose = false;
+    m_nAccessCount = 0;
+    m_nLongLastingCallCount = 0;
+    m_aNoAccessCountCondition.set();
+    m_aNoLongLastingCallCountCondition.set();
+}
+
+LifeTimeManager::~LifeTimeManager()
+{
+}
+
+bool LifeTimeManager::impl_isDisposed( bool bAssert )
+{
+    if( m_bDisposed || m_bInDispose )
+    {
+        if( bAssert )
+        {
+            OSL_FAIL( "This component is already disposed " );
+        }
+        return true;
+    }
+    return false;
+}
+
+bool LifeTimeManager::impl_canStartApiCall()
+{
+    if( impl_isDisposed() )
+        return false; //behave passive if already disposed
+
+    //mutex is acquired
+    return true;
+}
+
+void LifeTimeManager::impl_registerApiCall(bool bLongLastingCall)
+{
+    //only allowed if not disposed
+    //do not acquire the mutex here because it will be acquired already
+    m_nAccessCount++;
+    if(m_nAccessCount==1)
+        //@todo? is it ok to wake some threads here while we have acquired the mutex?
+        m_aNoAccessCountCondition.reset();
+
+    if(bLongLastingCall)
+        m_nLongLastingCallCount++;
+    if(m_nLongLastingCallCount==1)
+        m_aNoLongLastingCallCountCondition.reset();
+}
+
+void LifeTimeManager::impl_unregisterApiCall(bool bLongLastingCall)
+{
+    //Mutex needs to be acquired exactly once
+    //mutex may be released inbetween in special case of impl_apiCallCountReachedNull()
+
+    OSL_ENSURE( m_nAccessCount>0, "access count mismatch" );
+    m_nAccessCount--;
+    if(bLongLastingCall)
+        m_nLongLastingCallCount--;
+    if( m_nLongLastingCallCount==0 )
+    {
+        m_aNoLongLastingCallCountCondition.set();
+    }
+    if( m_nAccessCount== 0)
+    {
+        m_aNoAccessCountCondition.set();
+        impl_apiCallCountReachedNull();
+
+    }
+}
+
+bool LifeTimeManager::dispose()
+{
+    //hold no mutex
+    {
+        osl::MutexGuard aGuard( m_aAccessMutex );
+
+        if( m_bDisposed || m_bInDispose )
+        {
+            SAL_WARN("chart2",  "This component is already disposed " );
+            return false; //behave passive if already disposed
+        }
+
+        m_bInDispose = true;
+        //adding any listener is not allowed anymore
+        //new calls will not be accepted
+        //still running calls have the freedom to finish their work without crash
+    }
+    //no mutex is acquired
+
+    //--do the disposing of listeners after calling this method
+    {
+        uno::Reference< lang::XComponent > xComponent(m_pComponent);
+        if(xComponent.is())
+        {
+            // notify XCLoseListeners
+            lang::EventObject aEvent( xComponent );
+            m_aListenerContainer.disposeAndClear( aEvent );
+        }
+    }
+
+    //no mutex is acquired
+    {
+        osl::MutexGuard aGuard( m_aAccessMutex );
+        OSL_ENSURE( !m_bDisposed, "dispose was called already" );
+        m_bDisposed = true;
+    }
+    //no mutex is acquired
+
+    //wait until all still running calls have finished
+    //the accessCount cannot grow anymore, because all calls will return after checking m_bDisposed
+    m_aNoAccessCountCondition.wait();
+
+    //we are the only ones working on our data now
+
+    return true;
+    //--release all resources and references after calling this method successful
+}
+
+CloseableLifeTimeManager::CloseableLifeTimeManager( css::util::XCloseable* pCloseable
+        , css::lang::XComponent* pComponent )
+        : LifeTimeManager( pComponent )
+        , m_pCloseable(pCloseable)
+{
+    m_bClosed = false;
+    m_bInTryClose = false;
+    m_bOwnership = false;
+    m_aEndTryClosingCondition.set();
+}
+
+CloseableLifeTimeManager::~CloseableLifeTimeManager()
+{
+}
+
+bool CloseableLifeTimeManager::impl_isDisposedOrClosed( bool bAssert )
+{
+    if( impl_isDisposed( bAssert ) )
+        return true;
+
+    if( m_bClosed )
+    {
+        if( bAssert )
+        {
+            OSL_FAIL( "This object is already closed" );
+        }
+        return true;
+    }
+    return false;
+}
+
+bool CloseableLifeTimeManager::g_close_startTryClose(bool bDeliverOwnership)
+{
+    //no mutex is allowed to be acquired
+    {
+        osl::MutexGuard aGuard( m_aAccessMutex );
+        if( impl_isDisposedOrClosed(false) )
+            return false;
+
+        //Mutex needs to be acquired exactly once; will be released inbetween
+        if( !impl_canStartApiCall() )
+            return false;
+        //mutex is acquired
+
+        //not closed already -> we try to close again
+        m_bInTryClose = true;
+        m_aEndTryClosingCondition.reset();
+
+        impl_registerApiCall(false);
+    }
+
+    //no mutex is acquired
+
+    //only remove listener calls will be worked on until end of tryclose
+    //all other new calls will wait till end of try close // @todo? is that really ok
+
+    //?? still running calls have the freedom to finish their work without crash
+
+    try
+    {
+        uno::Reference< util::XCloseable > xCloseable(m_pCloseable);
+        if(xCloseable.is())
+        {
+            //--call queryClosing on all registered close listeners
+            ::cppu::OInterfaceContainerHelper* pIC = m_aListenerContainer.getContainer(
+                        cppu::UnoType<util::XCloseListener>::get());
+            if( pIC )
+            {
+                lang::EventObject aEvent( xCloseable );
+                ::cppu::OInterfaceIteratorHelper aIt( *pIC );
+                while( aIt.hasMoreElements() )
+                {
+                    uno::Reference< util::XCloseListener > xCloseListener( aIt.next(), uno::UNO_QUERY );
+                    if(xCloseListener.is())
+                        xCloseListener->queryClosing( aEvent, bDeliverOwnership );
+                }
+            }
+        }
+    }
+    catch( const uno::Exception& )
+    {
+        //no mutex is acquired
+        g_close_endTryClose(bDeliverOwnership);
+        throw;
+    }
+    return true;
+}
+
+void CloseableLifeTimeManager::g_close_endTryClose(bool bDeliverOwnership )
+{
+    //this method is called, if the try to close was not successful
+    osl::MutexGuard aGuard( m_aAccessMutex );
+    impl_setOwnership( bDeliverOwnership, false );
+
+    m_bInTryClose = false;
+    m_aEndTryClosingCondition.set();
+
+    //Mutex needs to be acquired exactly once
+    //mutex may be released inbetween in special case of impl_apiCallCountReachedNull()
+    impl_unregisterApiCall(false);
+}
+
+void CloseableLifeTimeManager::g_close_isNeedToCancelLongLastingCalls( bool bDeliverOwnership, util::CloseVetoException const & ex )
+{
+    //this method is called when no closelistener has had a veto during queryclosing
+    //the method returns false, if nothing stands against closing anymore
+    //it returns true, if some longlasting calls are running, which might be cancelled
+    //it throws the given exception, if long calls are running but not cancelable
+
+    osl::MutexGuard aGuard( m_aAccessMutex );
+    //this count cannot grow after try of close has started, because we wait in all those methods for end of try closing
+    if( !m_nLongLastingCallCount )
+        return;
+
+    impl_setOwnership( bDeliverOwnership, true );
+
+    m_bInTryClose = false;
+    m_aEndTryClosingCondition.set();
+
+    //Mutex needs to be acquired exactly once
+    //mutex may be released inbetween in special case of impl_apiCallCountReachedNull()
+    impl_unregisterApiCall(false);
+
+    throw ex;
+}
+
+void CloseableLifeTimeManager::g_close_endTryClose_doClose()
+{
+    //this method is called, if the try to close was successful
+    osl::MutexGuard aGuard( m_aAccessMutex );
+
+    m_bInTryClose       = false;
+    m_aEndTryClosingCondition.set();
+
+    //Mutex needs to be acquired exactly once
+    //mutex may be released inbetween in special case of impl_apiCallCountReachedNull()
+    impl_unregisterApiCall(false);
+    impl_doClose();
+}
+
+void CloseableLifeTimeManager::impl_setOwnership( bool bDeliverOwnership, bool bMyVeto )
+{
+    m_bOwnership            = bDeliverOwnership && bMyVeto;
+}
+
+void CloseableLifeTimeManager::impl_apiCallCountReachedNull()
+{
+    //Mutex needs to be acquired exactly once
+    //mutex will be released inbetween in impl_doClose()
+    if( m_pCloseable && m_bOwnership )
+        impl_doClose();
+}
+
+void CloseableLifeTimeManager::impl_doClose()
+{
+    //Mutex needs to be acquired exactly once before calling impl_doClose()
+
+    if(m_bClosed)
+        return; //behave as passive as possible, if disposed or closed already
+    if( m_bDisposed || m_bInDispose )
+        return; //behave as passive as possible, if disposed or closed already
+
+    m_bClosed = true;
+
+    NegativeGuard< osl::Mutex > aNegativeGuard( m_aAccessMutex );
+    //mutex is not acquired, mutex will be reacquired at the end of this method automatically
+
+    uno::Reference< util::XCloseable > xCloseable;
+    try
+    {
+        xCloseable.set(m_pCloseable);
+        if(xCloseable.is())
+        {
+            //--call notifyClosing on all registered close listeners
+            ::cppu::OInterfaceContainerHelper* pIC = m_aListenerContainer.getContainer(
+                        cppu::UnoType<util::XCloseListener>::get());
+            if( pIC )
+            {
+                lang::EventObject aEvent( xCloseable );
+                ::cppu::OInterfaceIteratorHelper aIt( *pIC );
+                while( aIt.hasMoreElements() )
+                {
+                    uno::Reference< util::XCloseListener > xListener( aIt.next(), uno::UNO_QUERY );
+                    if( xListener.is() )
+                        xListener->notifyClosing( aEvent );
+                }
+            }
+        }
+    }
+    catch( const uno::Exception& )
+    {
+        DBG_UNHANDLED_EXCEPTION("chart2");
+    }
+
+    if(xCloseable.is())
+    {
+        uno::Reference< lang::XComponent > xComponent( xCloseable, uno::UNO_QUERY );
+        if(xComponent.is())
+        {
+            OSL_ENSURE( m_bClosed, "a not closed component will be disposed " );
+            xComponent->dispose();
+        }
+    }
+    //mutex will be reacquired in destructor of aNegativeGuard
+}
+
+void CloseableLifeTimeManager::g_addCloseListener( const uno::Reference< util::XCloseListener > & xListener )
+{
+    osl::MutexGuard aGuard( m_aAccessMutex );
+    //Mutex needs to be acquired exactly once; will be released inbetween
+    if( !impl_canStartApiCall() )
+        return;
+    //mutex is acquired
+
+    m_aListenerContainer.addInterface( cppu::UnoType<util::XCloseListener>::get(),xListener );
+    m_bOwnership = false;
+}
+
+bool CloseableLifeTimeManager::impl_canStartApiCall()
+{
+    //Mutex needs to be acquired exactly once before calling this method
+    //the mutex will be released inbetween and reacquired
+
+    if( impl_isDisposed() )
+        return false; //behave passive if already disposed
+    if( m_bClosed )
+        return false; //behave passive if closing is already done
+
+    //during try-close most calls need to wait for the decision
+    while( m_bInTryClose )
+    {
+        //if someone tries to close this object at the moment
+        //we need to wait for his end because the result of the preceding call
+        //is relevant for our behaviour here
+
+        m_aAccessMutex.release();
+        m_aEndTryClosingCondition.wait(); //@todo??? this may block??? try closing
+        m_aAccessMutex.acquire();
+        if( m_bDisposed || m_bInDispose || m_bClosed )
+            return false; //return if closed already
+    }
+    //mutex is acquired
+    return true;
+}
+
+bool LifeTimeGuard::startApiCall(bool bLongLastingCall)
+{
+    //Mutex needs to be acquired exactly once; will be released inbetween
+    //mutex is required due to constructor of LifeTimeGuard
+
+    OSL_ENSURE( !m_bCallRegistered, "this method is only allowed ones" );
+    if(m_bCallRegistered)
+        return false;
+
+    //Mutex needs to be acquired exactly once; will be released inbetween
+    if( !m_rManager.impl_canStartApiCall() )
+        return false;
+    //mutex is acquired
+
+    m_bCallRegistered = true;
+    m_bLongLastingCallRegistered = bLongLastingCall;
+    m_rManager.impl_registerApiCall(bLongLastingCall);
+    return true;
+}
+
+LifeTimeGuard::~LifeTimeGuard()
+{
+    try
+    {
+        //do acquire the mutex if it was cleared before
+        osl::MutexGuard g(m_rManager.m_aAccessMutex);
+        if(m_bCallRegistered)
+        {
+            //Mutex needs to be acquired exactly once
+            //mutex may be released inbetween in special case of impl_apiCallCountReachedNull()
+            m_rManager.impl_unregisterApiCall(m_bLongLastingCallRegistered);
+        }
+    }
+    catch( uno::Exception& ex )
+    {
+        //@todo ? allow a uno::RuntimeException from dispose to travel through??
+        ex.Context.is(); //to avoid compilation warnings
+    }
+}
+
+}//end namespace apphelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */