cppuhelper/source/implbase.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <cppuhelper/compbase_ex.hxx>
  21 #include <cppuhelper/exc_hlp.hxx>
  22 #include <osl/diagnose.h>
  23 #include <sal/log.hxx>
  24
  25 #include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
  26 #include <com/sun/star/uno/RuntimeException.hpp>
  27
  28 using namespace ::osl;
  29 using namespace ::com::sun::star;
  30 using namespace ::com::sun::star::uno;
  31
  32
  33 namespace cppu
  34 {
  35
  36 // WeakComponentImplHelperBase
  37
  38 WeakComponentImplHelperBase::WeakComponentImplHelperBase( Mutex & rMutex )
  39     : rBHelper( rMutex )
  40 {
  41 }
  42
  43 WeakComponentImplHelperBase::~WeakComponentImplHelperBase()
  44 {
  45 }
  46
  47 void WeakComponentImplHelperBase::disposing()
  48 {
  49 }
  50
  51 Any WeakComponentImplHelperBase::queryInterface( Type const & rType )
  52 {
  53     if (rType == cppu::UnoType<lang::XComponent>::get())
  54     {
  55         void * p = static_cast< lang::XComponent * >( this );
  56         return Any( &p, rType );
  57     }
  58     return OWeakObject::queryInterface( rType );
  59 }
  60
  61 void WeakComponentImplHelperBase::acquire()
  62     noexcept
  63 {
  64     OWeakObject::acquire();
  65 }
  66
  67 void WeakComponentImplHelperBase::release()
  68     noexcept
  69 {
  70     if (osl_atomic_decrement( &m_refCount ) != 0)
  71         return;
  72
  73     // ensure no other references are created, via the weak connection point, from now on
  74     disposeWeakConnectionPoint();
  75     // restore reference count:
  76     osl_atomic_increment( &m_refCount );
  77     if (! rBHelper.bDisposed) {
  78         try {
  79             dispose();
  80         }
  81         catch (RuntimeException const& exc) { // don't break throw ()
  82             SAL_WARN( "cppuhelper", exc );
  83         }
  84         OSL_ASSERT( rBHelper.bDisposed );
  85     }
  86     OWeakObject::release();
  87 }
  88
  89 void WeakComponentImplHelperBase::dispose()
  90 {
  91     ClearableMutexGuard aGuard( rBHelper.rMutex );
  92     if (rBHelper.bDisposed || rBHelper.bInDispose)
  93         return;
  94
  95     rBHelper.bInDispose = true;
  96     aGuard.clear();
  97     try
  98     {
  99         // side effect: keeping a reference to this
 100         lang::EventObject aEvt( static_cast< OWeakObject * >( this ) );
 101         try
 102         {
 103             rBHelper.aLC.disposeAndClear( aEvt );
 104             disposing();
 105         }
 106         catch (...)
 107         {
 108             MutexGuard aGuard2( rBHelper.rMutex );
 109             // bDisposed and bInDispose must be set in this order:
 110             rBHelper.bDisposed = true;
 111             rBHelper.bInDispose = false;
 112             throw;
 113         }
 114         MutexGuard aGuard2( rBHelper.rMutex );
 115         // bDisposed and bInDispose must be set in this order:
 116         rBHelper.bDisposed = true;
 117         rBHelper.bInDispose = false;
 118     }
 119     catch (RuntimeException &)
 120     {
 121         throw;
 122     }
 123     catch (Exception & exc)
 124     {
 125         css::uno::Any anyEx = cppu::getCaughtException();
 126         throw lang::WrappedTargetRuntimeException(
 127             "unexpected UNO exception caught: " + exc.Message,
 128             nullptr, anyEx );
 129     }
 130 }
 131
 132 void WeakComponentImplHelperBase::addEventListener(
 133     Reference< lang::XEventListener > const & xListener )
 134 {
 135     ClearableMutexGuard aGuard( rBHelper.rMutex );
 136     if (rBHelper.bDisposed || rBHelper.bInDispose)
 137     {
 138         aGuard.clear();
 139         lang::EventObject aEvt( static_cast< OWeakObject * >( this ) );
 140         xListener->disposing( aEvt );
 141     }
 142     else
 143     {
 144         rBHelper.addListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
 145     }
 146 }
 147
 148 void WeakComponentImplHelperBase::removeEventListener(
 149     Reference< lang::XEventListener > const & xListener )
 150 {
 151     rBHelper.removeListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
 152 }
 153
 154 // WeakAggComponentImplHelperBase
 155
 156 WeakAggComponentImplHelperBase::WeakAggComponentImplHelperBase( Mutex & rMutex )
 157     : rBHelper( rMutex )
 158 {
 159 }
 160
 161 WeakAggComponentImplHelperBase::~WeakAggComponentImplHelperBase()
 162 {
 163 }
 164
 165 void WeakAggComponentImplHelperBase::disposing()
 166 {
 167 }
 168
 169 Any WeakAggComponentImplHelperBase::queryInterface( Type const & rType )
 170 {
 171     return OWeakAggObject::queryInterface( rType );
 172 }
 173
 174 Any WeakAggComponentImplHelperBase::queryAggregation( Type const & rType )
 175 {
 176     if (rType == cppu::UnoType<lang::XComponent>::get())
 177     {
 178         void * p = static_cast< lang::XComponent * >( this );
 179         return Any( &p, rType );
 180     }
 181     return OWeakAggObject::queryAggregation( rType );
 182 }
 183
 184 void WeakAggComponentImplHelperBase::acquire()
 185     noexcept
 186 {
 187     OWeakAggObject::acquire();
 188 }
 189
 190 void WeakAggComponentImplHelperBase::release()
 191     noexcept
 192 {
 193     Reference<XInterface> const xDelegator_(xDelegator);
 194     if (xDelegator_.is()) {
 195         OWeakAggObject::release();
 196     }
 197     else if (osl_atomic_decrement( &m_refCount ) == 0) {
 198         // ensure no other references are created, via the weak connection point, from now on
 199         disposeWeakConnectionPoint();
 200         // restore reference count:
 201         osl_atomic_increment( &m_refCount );
 202         if (! rBHelper.bDisposed) {
 203             try {
 204                 dispose();
 205             }
 206             catch (RuntimeException const& exc) { // don't break throw ()
 207                 SAL_WARN( "cppuhelper", exc );
 208             }
 209             OSL_ASSERT( rBHelper.bDisposed );
 210         }
 211         OWeakAggObject::release();
 212     }
 213 }
 214
 215 void WeakAggComponentImplHelperBase::dispose()
 216 {
 217     ClearableMutexGuard aGuard( rBHelper.rMutex );
 218     if (rBHelper.bDisposed || rBHelper.bInDispose)
 219         return;
 220
 221     rBHelper.bInDispose = true;
 222     aGuard.clear();
 223     try
 224     {
 225         // side effect: keeping a reference to this
 226         lang::EventObject aEvt( static_cast< OWeakObject * >( this ) );
 227         try
 228         {
 229             rBHelper.aLC.disposeAndClear( aEvt );
 230             disposing();
 231         }
 232         catch (...)
 233         {
 234             MutexGuard aGuard2( rBHelper.rMutex );
 235             // bDisposed and bInDispose must be set in this order:
 236             rBHelper.bDisposed = true;
 237             rBHelper.bInDispose = false;
 238             throw;
 239         }
 240         MutexGuard aGuard2( rBHelper.rMutex );
 241         // bDisposed and bInDispose must be set in this order:
 242         rBHelper.bDisposed = true;
 243         rBHelper.bInDispose = false;
 244     }
 245     catch (RuntimeException &)
 246     {
 247         throw;
 248     }
 249     catch (Exception & exc)
 250     {
 251         css::uno::Any anyEx = cppu::getCaughtException();
 252         throw lang::WrappedTargetRuntimeException(
 253             "unexpected UNO exception caught: " + exc.Message,
 254             nullptr, anyEx );
 255     }
 256 }
 257
 258 void WeakAggComponentImplHelperBase::addEventListener(
 259     Reference< lang::XEventListener > const & xListener )
 260 {
 261     ClearableMutexGuard aGuard( rBHelper.rMutex );
 262     if (rBHelper.bDisposed || rBHelper.bInDispose)
 263     {
 264         aGuard.clear();
 265         lang::EventObject aEvt( static_cast< OWeakObject * >( this ) );
 266         xListener->disposing( aEvt );
 267     }
 268     else
 269     {
 270         rBHelper.addListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
 271     }
 272 }
 273
 274 void WeakAggComponentImplHelperBase::removeEventListener(
 275     Reference< lang::XEventListener > const & xListener )
 276 {
 277     // if we have disposed, then we have cleared the list already
 278     MutexGuard aGuard( rBHelper.rMutex );
 279     if (!rBHelper.bDisposed)
 280         rBHelper.removeListener( cppu::UnoType<decltype(xListener)>::get(), xListener );
 281 }
 282
 283 }
 284
 285 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */