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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 <rtl/string.hxx>
#include <osl/diagnose.h>
#include <cppuhelper/component.hxx>
#include <cppuhelper/queryinterface.hxx>
#include <cppuhelper/typeprovider.hxx>
#include <com/sun/star/uno/RuntimeException.hpp>
using namespace osl;
using namespace com::sun::star;
using namespace com::sun::star::uno;
using namespace com::sun::star::lang;
using ::rtl::OString;
using ::rtl::OUStringToOString;
namespace cppu
{
// class OComponentHelper
OComponentHelper::OComponentHelper( Mutex & rMutex )
: rBHelper( rMutex )
{
}
OComponentHelper::~OComponentHelper()
{
}
Any OComponentHelper::queryInterface( Type const & rType )
{
return OWeakAggObject::queryInterface( rType );
}
Any OComponentHelper::queryAggregation( Type const & rType )
{
if (rType == cppu::UnoType<lang::XComponent>::get())
{
void * p = static_cast< lang::XComponent * >( this );
return Any( &p, rType );
}
if (rType == cppu::UnoType<lang::XTypeProvider>::get())
{
void * p = static_cast< lang::XTypeProvider * >( this );
return Any( &p, rType );
}
return OWeakAggObject::queryAggregation( rType );
}
void OComponentHelper::acquire() throw ()
{
OWeakAggObject::acquire();
}
void OComponentHelper::release() throw()
{
Reference<XInterface > x( xDelegator );
if (! x.is())
{
if (osl_atomic_decrement( &m_refCount ) == 0)
{
if (! rBHelper.bDisposed)
{
// *before* again incrementing our ref count, ensure that our weak connection point
// will not create references to us anymore (via XAdapter::queryAdapted)
disposeWeakConnectionPoint();
Reference<XInterface > xHoldAlive( *this );
// First dispose
try
{
dispose();
}
catch (css::uno::RuntimeException & exc)
{
// release should not throw exceptions
#if OSL_DEBUG_LEVEL > 0
OString msg( OUStringToOString( exc.Message, RTL_TEXTENCODING_ASCII_US ) );
OSL_FAIL( msg.getStr() );
#else
(void) exc; // avoid warning about unused variable
#endif
}
// only the alive ref holds the object
assert( m_refCount == 1 );
// destroy the object if xHoldAlive decrement the refcount to 0
return;
}
}
// restore the reference count
osl_atomic_increment( &m_refCount );
}
OWeakAggObject::release();
}
Sequence< Type > OComponentHelper::getTypes()
{
static OTypeCollection * s_pTypes = nullptr;
if (! s_pTypes)
{
MutexGuard aGuard( Mutex::getGlobalMutex() );
if (! s_pTypes)
{
static OTypeCollection s_aTypes(
cppu::UnoType<lang::XComponent>::get(),
cppu::UnoType<lang::XTypeProvider>::get(),
cppu::UnoType<XAggregation>::get(),
cppu::UnoType<XWeak>::get() );
s_pTypes = &s_aTypes;
}
}
return s_pTypes->getTypes();
}
// XComponent
void OComponentHelper::disposing()
{
}
// XComponent
void OComponentHelper::dispose()
{
// An frequently programming error is to release the last
// reference to this object in the disposing message.
// Make it robust, hold a self Reference.
Reference<XComponent > xSelf( this );
// Guard dispose against multiple threading
// Remark: It is an error to call dispose more than once
bool bDoDispose = false;
{
MutexGuard aGuard( rBHelper.rMutex );
if( !rBHelper.bDisposed && !rBHelper.bInDispose )
{
// only one call go into this section
rBHelper.bInDispose = true;
bDoDispose = true;
}
}
// Do not hold the mutex because we are broadcasting
if( bDoDispose )
{
// Create an event with this as sender
try
{
try
{
Reference<XInterface > xSource(
Reference<XInterface >::query( static_cast<XComponent *>(this) ) );
EventObject aEvt;
aEvt.Source = xSource;
// inform all listeners to release this object
// The listener container are automatically cleared
rBHelper.aLC.disposeAndClear( aEvt );
// notify subclasses to do their dispose
disposing();
}
catch (...)
{
MutexGuard aGuard( rBHelper.rMutex );
// bDispose and bInDisposing must be set in this order:
rBHelper.bDisposed = true;
rBHelper.bInDispose = false;
throw;
}
MutexGuard aGuard( rBHelper.rMutex );
// bDispose and bInDisposing must be set in this order:
rBHelper.bDisposed = true;
rBHelper.bInDispose = false;
}
catch (RuntimeException &)
{
throw;
}
catch (Exception & exc)
{
throw RuntimeException(
"unexpected UNO exception caught: " + exc.Message );
}
}
else
{
// in a multithreaded environment, it can't be avoided
// that dispose is called twice.
// However this condition is traced, because it MAY indicate an error.
SAL_WARN("cppuhelper", "OComponentHelper::dispose() - dispose called twice" );
}
}
// XComponent
void OComponentHelper::addEventListener(
const Reference<XEventListener > & rxListener )
{
ClearableMutexGuard aGuard( rBHelper.rMutex );
if (rBHelper.bDisposed || rBHelper.bInDispose)
{
aGuard.clear();
Reference< XInterface > x( static_cast<XComponent *>(this), UNO_QUERY );
rxListener->disposing( EventObject( x ) );
}
else
{
rBHelper.addListener( cppu::UnoType<decltype(rxListener)>::get(), rxListener );
}
}
// XComponent
void OComponentHelper::removeEventListener(
const Reference<XEventListener > & rxListener )
{
rBHelper.removeListener( cppu::UnoType<decltype(rxListener)>::get(), rxListener );
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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