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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 .
+ */
+#pragma once
+
+#include <osl/mutex.hxx>
+#include <osl/conditn.hxx>
+#include <comphelper/multicontainer2.hxx>
+#include "charttoolsdllapi.hxx"
+
+namespace com::sun::star::lang { class XComponent; }
+namespace com::sun::star::util { class CloseVetoException; }
+namespace com::sun::star::util { class XCloseListener; }
+namespace com::sun::star::util { class XCloseable; }
+
+namespace apphelper
+{
+
+class OOO_DLLPUBLIC_CHARTTOOLS LifeTimeManager
+{
+friend class LifeTimeGuard;
+protected:
+ mutable ::osl::Mutex m_aAccessMutex;
+public:
+ LifeTimeManager( css::lang::XComponent* pComponent );
+ virtual ~LifeTimeManager();
+
+ bool impl_isDisposed( bool bAssert=true );
+ /// @throws css::uno::RuntimeException
+ bool dispose();
+
+public:
+ ::comphelper::OMultiTypeInterfaceContainerHelper2 m_aListenerContainer;
+
+protected:
+ SAL_DLLPRIVATE virtual bool impl_canStartApiCall();
+ SAL_DLLPRIVATE virtual void impl_apiCallCountReachedNull(){}
+
+ SAL_DLLPRIVATE void impl_registerApiCall(bool bLongLastingCall);
+ SAL_DLLPRIVATE void impl_unregisterApiCall(bool bLongLastingCall);
+
+protected:
+ css::lang::XComponent* m_pComponent;
+
+ ::osl::Condition m_aNoAccessCountCondition;
+ sal_Int32 m_nAccessCount;
+
+ bool volatile m_bDisposed;
+ bool volatile m_bInDispose;
+
+ ::osl::Condition m_aNoLongLastingCallCountCondition;
+ sal_Int32 m_nLongLastingCallCount;
+};
+
+class CloseableLifeTimeManager final : public LifeTimeManager
+{
+ css::util::XCloseable* m_pCloseable;
+
+ ::osl::Condition m_aEndTryClosingCondition;
+ bool volatile m_bClosed;
+ bool volatile m_bInTryClose;
+ //the ownership between model and controller is not clear at first
+ //each controller might consider him as owner of the model first
+ //at start the model is not considered as owner of itself
+ bool volatile m_bOwnership;
+
+public:
+ CloseableLifeTimeManager( css::util::XCloseable* pCloseable
+ , css::lang::XComponent* pComponent );
+ virtual ~CloseableLifeTimeManager() override;
+
+ bool impl_isDisposedOrClosed( bool bAssert=true );
+/// @throws css::uno::Exception
+ bool g_close_startTryClose(bool bDeliverOwnership);
+/// @throws css::util::CloseVetoException
+ void g_close_isNeedToCancelLongLastingCalls( bool bDeliverOwnership, css::util::CloseVetoException const & ex );
+ void g_close_endTryClose(bool bDeliverOwnership );
+ void g_close_endTryClose_doClose();
+/// @throws css::uno::RuntimeException
+ void g_addCloseListener( const css::uno::Reference< css::util::XCloseListener > & xListener );
+
+private:
+ virtual bool impl_canStartApiCall() override;
+ virtual void impl_apiCallCountReachedNull() override;
+
+ void impl_setOwnership( bool bDeliverOwnership, bool bMyVeto );
+ void impl_doClose();
+};
+
+/*
+Use this Guard in your ApiCalls to protect access on resources
+which will be released in dispose.
+It's guaranteed that the release of resources only starts if your
+guarded call has finished.
+! It's only partly guaranteed that this resources will not change during the call.
+See the example for details.
+
+This class is to be used as described in the example.
+
+If this guard is used in all api calls of an XCloseable object
+it's guaranteed that the closeable will close itself after finishing the last call
+if it should do so.
+
+ ::ApiCall
+{
+ //hold no mutex!!!
+ LifeTimeGuard aLifeTimeGuard(m_aLifeTimeManager);
+
+ //mutex is acquired; call is not registered
+
+ if(!aLifeTimeGuard.startApiCall())
+ return ; //behave as passive as possible, if disposed or closed
+
+ //mutex is acquired, call is registered
+ {
+ //you might access some private members here
+ //but then you need to protect access to these members always like this
+ //never call to the outside here
+ }
+
+ aLifeTimeGuard.clear(); //!!!
+
+ //Mutex is released, the running call is still registered
+ //this call will finish before the 'release-section' in dispose is allowed to start
+
+ {
+ //you might access some private members here guarded with your own mutex
+ //but release your mutex at the end of this block
+ }
+
+ //you can call to the outside (without holding the mutex) without becoming disposed
+
+ //End of method -> ~LifeTimeGuard
+ //-> call is unregistered
+ //-> this object might be disposed now
+}
+
+your XComponent::dispose method has to be implemented in the following way:
+
+ ::dispose()
+{
+ //hold no mutex!!!
+ if( !m_aLifeTimeManager.dispose() )
+ return;
+
+ //--release all resources and references
+
+}
+
+*/
+
+class LifeTimeGuard
+{
+
+public:
+ LifeTimeGuard( LifeTimeManager& rManager )
+ : m_guard( rManager.m_aAccessMutex )
+ , m_rManager(rManager)
+ , m_bCallRegistered(false)
+ , m_bLongLastingCallRegistered(false)
+ {
+
+ }
+ bool startApiCall(bool bLongLastingCall=false);
+ ~LifeTimeGuard();
+ void clear() { m_guard.clear(); }
+
+private:
+ osl::ClearableMutexGuard m_guard;
+ LifeTimeManager& m_rManager;
+ bool m_bCallRegistered;
+ bool m_bLongLastingCallRegistered;
+
+private:
+ LifeTimeGuard( const LifeTimeGuard& ) = delete;
+ LifeTimeGuard& operator= ( const LifeTimeGuard& ) = delete;
+};
+
+template<class T>
+class NegativeGuard final
+{
+ T * m_pT;
+public:
+
+ NegativeGuard(T & t) : m_pT(&t)
+ {
+ m_pT->release();
+ }
+
+ ~NegativeGuard()
+ {
+ m_pT->acquire();
+ }
+};
+
+}//end namespace apphelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */