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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 .
*/
#ifndef INCLUDED_COMPHELPER_COMPONENTBASE_HXX
#define INCLUDED_COMPHELPER_COMPONENTBASE_HXX
#include <comphelper/comphelperdllapi.h>
#include <cppuhelper/interfacecontainer.hxx>
namespace comphelper
{
//= ComponentBase
class COMPHELPER_DLLPUBLIC ComponentBase
{
protected:
/** creates a ComponentBase instance
The instance is not initialized. As a consequence, every ComponentMethodGuard instantiated for
this component will throw a css::lang::NotInitializedException,
until ->setInitialized() is called.
*/
ComponentBase( ::cppu::OBroadcastHelper& _rBHelper )
:m_rBHelper( _rBHelper )
,m_bInitialized( false )
{
}
struct NoInitializationNeeded { };
/** creates a ComponentBase instance
The instance is already initialized, so there's no need to call setInitialized later on. Use this
constructor for component implementations which do not require explicit initialization.
*/
ComponentBase( ::cppu::OBroadcastHelper& _rBHelper, NoInitializationNeeded )
:m_rBHelper( _rBHelper )
,m_bInitialized( true )
{
}
~ComponentBase() {}
/** marks the instance as initialized
Subsequent instantiations of a ComponentMethodGuard won't throw the NotInitializedException now.
*/
void setInitialized() { m_bInitialized = true; }
public:
/// helper struct to grant access to selected public methods to the ComponentMethodGuard class
struct GuardAccess { friend class ComponentMethodGuard; private: GuardAccess() { } };
/// retrieves the component's mutex
::osl::Mutex& getMutex( GuardAccess ) { return getMutex(); }
/// checks whether the component is already disposed, throws a DisposedException if so.
void checkDisposed( GuardAccess ) const;
/// checks whether the component is already initialized, throws a NotInitializedException if not.
void checkInitialized( GuardAccess ) const;
protected:
/// retrieves the component's broadcast helper
::cppu::OBroadcastHelper& getBroadcastHelper() { return m_rBHelper; }
/// retrieves the component's mutex
::osl::Mutex& getMutex() { return m_rBHelper.rMutex; }
/// determines whether the instance is already disposed
bool impl_isDisposed() const { return m_rBHelper.bDisposed; }
/// determines whether the component is already initialized
bool
impl_isInitialized_nothrow() const { return m_bInitialized; }
/** returns the context to be used when throwing exceptions
The default implementation returns <NULL/>.
*/
static css::uno::Reference< css::uno::XInterface >
getComponent();
private:
::cppu::OBroadcastHelper& m_rBHelper;
bool m_bInitialized;
};
class ComponentMethodGuard
{
public:
enum class MethodType
{
/// allow the method to be called only when being initialized and not being disposed
Default,
/// allow the method to be called without being initialized
WithoutInit
};
ComponentMethodGuard( ComponentBase& _rComponent, const MethodType _eType = MethodType::Default )
:m_aMutexGuard( _rComponent.getMutex( ComponentBase::GuardAccess() ) )
{
if ( _eType != MethodType::WithoutInit )
_rComponent.checkInitialized( ComponentBase::GuardAccess() );
_rComponent.checkDisposed( ComponentBase::GuardAccess() );
}
void clear()
{
m_aMutexGuard.clear();
}
private:
::osl::ResettableMutexGuard m_aMutexGuard;
};
} // namespace ComponentBase
#endif // INCLUDED_COMPHELPER_COMPONENTBASE_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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