Bug Summary

File:home/maarten/src/libreoffice/core/include/rtl/ref.hxx
Warning:line 192, column 9
Use of memory after it is freed

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name statusbarcontroller.cxx -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -mframe-pointer=all -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib64/clang/11.0.0 -D BOOST_ERROR_CODE_HEADER_ONLY -D BOOST_SYSTEM_NO_DEPRECATED -D CPPU_ENV=gcc3 -D LINUX -D OSL_DEBUG_LEVEL=1 -D SAL_LOG_INFO -D SAL_LOG_WARN -D UNIX -D UNX -D X86_64 -D _PTHREADS -D _REENTRANT -D SVT_DLLIMPLEMENTATION -D EXCEPTIONS_ON -D LIBO_INTERNAL_ONLY -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/icu/source -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/icu/source/i18n -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/icu/source/common -I /home/maarten/src/libreoffice/core/external/boost/include -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/boost -I /home/maarten/src/libreoffice/core/include -I /usr/lib/jvm/java-11-openjdk-11.0.9.10-0.0.ea.fc33.x86_64/include -I /usr/lib/jvm/java-11-openjdk-11.0.9.10-0.0.ea.fc33.x86_64/include/linux -I /home/maarten/src/libreoffice/core/config_host -I /home/maarten/src/libreoffice/core/workdir/CustomTarget/officecfg/registry -I /home/maarten/src/libreoffice/core/workdir/UnoApiHeadersTarget/udkapi/normal -I /home/maarten/src/libreoffice/core/workdir/UnoApiHeadersTarget/offapi/normal -I /home/maarten/src/libreoffice/core/svtools/source/inc -I /home/maarten/src/libreoffice/core/svtools/inc -internal-isystem /usr/bin/../lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10 -internal-isystem /usr/bin/../lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10/x86_64-redhat-linux -internal-isystem /usr/bin/../lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib64/clang/11.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O0 -Wno-missing-braces -std=c++17 -fdeprecated-macro -fdebug-compilation-dir /home/maarten/src/libreoffice/core -ferror-limit 19 -fvisibility hidden -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -debug-info-kind=constructor -analyzer-output=html -faddrsig -o /home/maarten/tmp/wis/scan-build-libreoffice/output/report/2020-10-07-141433-9725-1 -x c++ /home/maarten/src/libreoffice/core/svtools/source/uno/statusbarcontroller.cxx

/home/maarten/src/libreoffice/core/svtools/source/uno/statusbarcontroller.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 <svtools/statusbarcontroller.hxx>
21#include <com/sun/star/beans/PropertyValue.hpp>
22#include <com/sun/star/frame/XDispatchProvider.hpp>
23#include <com/sun/star/frame/XFrame.hpp>
24#include <com/sun/star/lang/DisposedException.hpp>
25#include <com/sun/star/lang/XMultiServiceFactory.hpp>
26#include <com/sun/star/util/URLTransformer.hpp>
27#include <com/sun/star/ui/XStatusbarItem.hpp>
28#include <cppuhelper/queryinterface.hxx>
29#include <vcl/svapp.hxx>
30#include <vcl/window.hxx>
31#include <vcl/status.hxx>
32#include <toolkit/helper/vclunohelper.hxx>
33#include <comphelper/processfactory.hxx>
34
35using namespace ::cppu;
36using namespace css::awt;
37using namespace css::uno;
38using namespace css::util;
39using namespace css::beans;
40using namespace css::lang;
41using namespace css::frame;
42
43namespace svt
44{
45
46StatusbarController::StatusbarController(
47 const Reference< XComponentContext >& rxContext,
48 const Reference< XFrame >& xFrame,
49 const OUString& aCommandURL,
50 unsigned short nID ) :
51 OWeakObject()
52 , m_bInitialized( false )
53 , m_bDisposed( false )
54 , m_nID( nID )
55 , m_xFrame( xFrame )
56 , m_xContext( rxContext )
57 , m_aCommandURL( aCommandURL )
58 , m_aListenerContainer( m_aMutex )
59{
60}
61
62StatusbarController::StatusbarController() :
63 OWeakObject()
64 , m_bInitialized( false )
65 , m_bDisposed( false )
66 , m_nID( 0 )
67 , m_aListenerContainer( m_aMutex )
68{
69}
70
71StatusbarController::~StatusbarController()
72{
73}
74
75Reference< XFrame > StatusbarController::getFrameInterface() const
76{
77 SolarMutexGuard aSolarMutexGuard;
78 return m_xFrame;
79}
80
81Reference< XURLTransformer > StatusbarController::getURLTransformer() const
82{
83 SolarMutexGuard aSolarMutexGuard;
84 if ( !m_xURLTransformer.is() && m_xContext.is() )
85 {
86 m_xURLTransformer = css::util::URLTransformer::create( m_xContext );
87 }
88
89 return m_xURLTransformer;
90}
91
92// XInterface
93Any SAL_CALL StatusbarController::queryInterface( const Type& rType )
94{
95 Any a = ::cppu::queryInterface(
96 rType ,
97 static_cast< XStatusbarController* >( this ),
98 static_cast< XStatusListener* >( this ),
99 static_cast< XEventListener* >( this ),
100 static_cast< XInitialization* >( this ),
101 static_cast< XComponent* >( this ),
102 static_cast< XUpdatable* >( this ));
103
104 if ( a.hasValue() )
105 return a;
106
107 return OWeakObject::queryInterface( rType );
108}
109
110void SAL_CALL StatusbarController::acquire() throw ()
111{
112 OWeakObject::acquire();
113}
114
115void SAL_CALL StatusbarController::release() throw ()
116{
117 OWeakObject::release();
118}
119
120void SAL_CALL StatusbarController::initialize( const Sequence< Any >& aArguments )
121{
122 bool bInitialized( true );
123
124 {
125 SolarMutexGuard aSolarMutexGuard;
126
127 if ( m_bDisposed )
128 throw DisposedException();
129
130 bInitialized = m_bInitialized;
131 }
132
133 if ( bInitialized )
134 return;
135
136 SolarMutexGuard aSolarMutexGuard;
137 m_bInitialized = true;
138
139 PropertyValue aPropValue;
140 for ( const auto& rArgument : aArguments )
141 {
142 if ( rArgument >>= aPropValue )
143 {
144 if ( aPropValue.Name == "Frame" )
145 aPropValue.Value >>= m_xFrame;
146 else if ( aPropValue.Name == "CommandURL" )
147 aPropValue.Value >>= m_aCommandURL;
148 else if ( aPropValue.Name == "ServiceManager" )
149 {
150 Reference<XMultiServiceFactory> xMSF;
151 aPropValue.Value >>= xMSF;
152 if( xMSF.is() )
153 m_xContext = comphelper::getComponentContext(xMSF);
154 }
155 else if ( aPropValue.Name == "ParentWindow" )
156 aPropValue.Value >>= m_xParentWindow;
157 else if ( aPropValue.Name == "Identifier" )
158 aPropValue.Value >>= m_nID;
159 else if ( aPropValue.Name == "StatusbarItem" )
160 aPropValue.Value >>= m_xStatusbarItem;
161 }
162 }
163
164 if ( !m_aCommandURL.isEmpty() )
165 m_aListenerMap.emplace( m_aCommandURL, Reference< XDispatch >() );
166}
167
168void SAL_CALL StatusbarController::update()
169{
170 {
171 SolarMutexGuard aSolarMutexGuard;
172 if ( m_bDisposed )
173 throw DisposedException();
174 }
175
176 // Bind all registered listeners to their dispatch objects
177 bindListener();
178}
179
180// XComponent
181void SAL_CALL StatusbarController::dispose()
182{
183 Reference< XComponent > xThis = this;
184
185 {
186 SolarMutexGuard aSolarMutexGuard;
187 if ( m_bDisposed )
188 throw DisposedException();
189 }
190
191 css::lang::EventObject aEvent( xThis );
192 m_aListenerContainer.disposeAndClear( aEvent );
193
194 SolarMutexGuard aSolarMutexGuard;
195 Reference< XStatusListener > xStatusListener = this;
196 Reference< XURLTransformer > xURLTransformer = getURLTransformer();
197 css::util::URL aTargetURL;
198 for (auto const& listener : m_aListenerMap)
199 {
200 try
201 {
202 Reference< XDispatch > xDispatch(listener.second);
203 aTargetURL.Complete = listener.first;
204 xURLTransformer->parseStrict( aTargetURL );
205
206 if ( xDispatch.is() && xStatusListener.is() )
207 xDispatch->removeStatusListener( xStatusListener, aTargetURL );
208 }
209 catch ( Exception& )
210 {
211 }
212 }
213
214 // clear hash map
215 m_aListenerMap.clear();
216
217 // release references
218 m_xURLTransformer.clear();
219 m_xContext.clear();
220 m_xFrame.clear();
221 m_xParentWindow.clear();
222 m_xStatusbarItem.clear();
223
224 m_bDisposed = true;
225}
226
227void SAL_CALL StatusbarController::addEventListener( const Reference< XEventListener >& xListener )
228{
229 m_aListenerContainer.addInterface( cppu::UnoType<XEventListener>::get(), xListener );
230}
231
232void SAL_CALL StatusbarController::removeEventListener( const Reference< XEventListener >& aListener )
233{
234 m_aListenerContainer.removeInterface( cppu::UnoType<XEventListener>::get(), aListener );
235}
236
237// XEventListener
238void SAL_CALL StatusbarController::disposing( const EventObject& Source )
239{
240 SolarMutexGuard aSolarMutexGuard;
241
242 if ( m_bDisposed )
243 return;
244
245 Reference< XFrame > xFrame( Source.Source, UNO_QUERY );
246 if ( xFrame.is() )
247 {
248 if ( xFrame == m_xFrame )
249 m_xFrame.clear();
250 return;
251 }
252
253 Reference< XDispatch > xDispatch( Source.Source, UNO_QUERY );
254 if ( !xDispatch.is() )
255 return;
256
257 for (auto & listener : m_aListenerMap)
258 {
259 // Compare references and release dispatch references if they are equal.
260 if ( xDispatch == listener.second )
261 listener.second.clear();
262 }
263}
264
265// XStatusListener
266void SAL_CALL StatusbarController::statusChanged( const FeatureStateEvent& Event )
267{
268 SolarMutexGuard aSolarMutexGuard;
269
270 if ( m_bDisposed )
271 return;
272
273 VclPtr<vcl::Window> pWindow = VCLUnoHelper::GetWindow( m_xParentWindow );
274 if ( pWindow && pWindow->GetType() == WindowType::STATUSBAR && m_nID != 0 )
275 {
276 OUString aStrValue;
277 StatusBar* pStatusBar = static_cast<StatusBar *>(pWindow.get());
278
279 if ( Event.State >>= aStrValue )
280 pStatusBar->SetItemText( m_nID, aStrValue );
281 else if ( !Event.State.hasValue() )
282 pStatusBar->SetItemText( m_nID, "" );
283 }
284}
285
286// XStatusbarController
287sal_Bool SAL_CALL StatusbarController::mouseButtonDown(
288 const css::awt::MouseEvent& )
289{
290 return false;
291}
292
293sal_Bool SAL_CALL StatusbarController::mouseMove(
294 const css::awt::MouseEvent& )
295{
296 return false;
297}
298
299sal_Bool SAL_CALL StatusbarController::mouseButtonUp(
300 const css::awt::MouseEvent& )
301{
302 return false;
303}
304
305void SAL_CALL StatusbarController::command(
306 const css::awt::Point&,
307 ::sal_Int32,
308 sal_Bool,
309 const css::uno::Any& )
310{
311}
312
313void SAL_CALL StatusbarController::paint(
314 const css::uno::Reference< css::awt::XGraphics >&,
315 const css::awt::Rectangle&,
316 ::sal_Int32 )
317{
318}
319
320void SAL_CALL StatusbarController::click( const css::awt::Point& )
321{
322}
323
324void SAL_CALL StatusbarController::doubleClick( const css::awt::Point& )
325{
326 SolarMutexGuard aSolarMutexGuard;
327
328 if ( m_bDisposed )
329 return;
330
331 Sequence< PropertyValue > aArgs;
332 execute( aArgs );
333}
334
335void StatusbarController::addStatusListener( const OUString& aCommandURL )
336{
337 Reference< XDispatch > xDispatch;
338 Reference< XStatusListener > xStatusListener;
339 css::util::URL aTargetURL;
340
341 {
342 SolarMutexGuard aSolarMutexGuard;
343 URLToDispatchMap::iterator pIter = m_aListenerMap.find( aCommandURL );
344
345 // Already in the list of status listener. Do nothing.
346 if ( pIter != m_aListenerMap.end() )
347 return;
348
349 // Check if we are already initialized. Implementation starts adding itself as status listener when
350 // initialize is called.
351 if ( !m_bInitialized )
352 {
353 // Put into the unordered_map of status listener. Will be activated when initialized is called
354 m_aListenerMap.emplace( aCommandURL, Reference< XDispatch >() );
355 return;
356 }
357 else
358 {
359 // Add status listener directly as initialize has already been called.
360 Reference< XDispatchProvider > xDispatchProvider( m_xFrame, UNO_QUERY );
361 if ( m_xContext.is() && xDispatchProvider.is() )
362 {
363 Reference< XURLTransformer > xURLTransformer = getURLTransformer();
364 aTargetURL.Complete = aCommandURL;
365 xURLTransformer->parseStrict( aTargetURL );
366 xDispatch = xDispatchProvider->queryDispatch( aTargetURL, OUString(), 0 );
367
368 xStatusListener = this;
369 URLToDispatchMap::iterator aIter = m_aListenerMap.find( aCommandURL );
370 if ( aIter != m_aListenerMap.end() )
371 {
372 Reference< XDispatch > xOldDispatch( aIter->second );
373 aIter->second = xDispatch;
374
375 try
376 {
377 if ( xOldDispatch.is() )
378 xOldDispatch->removeStatusListener( xStatusListener, aTargetURL );
379 }
380 catch ( Exception& )
381 {
382 }
383 }
384 else
385 m_aListenerMap.emplace( aCommandURL, xDispatch );
386 }
387 }
388 }
389
390 // Call without locked mutex as we are called back from dispatch implementation
391 try
392 {
393 if ( xDispatch.is() )
394 xDispatch->addStatusListener( xStatusListener, aTargetURL );
395 }
396 catch ( Exception& )
397 {
398 }
399}
400
401void StatusbarController::bindListener()
402{
403 std::vector< Listener > aDispatchVector;
404 Reference< XStatusListener > xStatusListener;
405
406 {
407 SolarMutexGuard aSolarMutexGuard;
408
409 if ( !m_bInitialized )
410 return;
411
412 // Collect all registered command URL's and store them temporary
413 Reference< XDispatchProvider > xDispatchProvider( m_xFrame, UNO_QUERY );
414 if ( m_xContext.is() && xDispatchProvider.is() )
415 {
416 xStatusListener = this;
417 for (auto & listener : m_aListenerMap)
418 {
419 Reference< XURLTransformer > xURLTransformer = getURLTransformer();
420 css::util::URL aTargetURL;
421 aTargetURL.Complete = listener.first;
422 xURLTransformer->parseStrict( aTargetURL );
423
424 Reference< XDispatch > xDispatch(listener.second);
425 if ( xDispatch.is() )
426 {
427 // We already have a dispatch object => we have to requery.
428 // Release old dispatch object and remove it as listener
429 try
430 {
431 xDispatch->removeStatusListener( xStatusListener, aTargetURL );
432 }
433 catch ( Exception& )
434 {
435 }
436 }
437
438 listener.second.clear();
439 xDispatch.clear();
440
441 // Query for dispatch object. Old dispatch will be released with this, too.
442 try
443 {
444 xDispatch = xDispatchProvider->queryDispatch( aTargetURL, OUString(), 0 );
445 }
446 catch ( Exception& )
447 {
448 }
449 listener.second = xDispatch;
450
451 Listener aListener( aTargetURL, xDispatch );
452 aDispatchVector.push_back( aListener );
453 }
454 }
455 }
456
457 // Call without locked mutex as we are called back from dispatch implementation
458 if ( !xStatusListener.is() )
459 return;
460
461 for (Listener & rListener : aDispatchVector)
462 {
463 try
464 {
465 if ( rListener.xDispatch.is() )
466 rListener.xDispatch->addStatusListener( xStatusListener, rListener.aURL );
467 else if ( rListener.aURL.Complete == m_aCommandURL )
468 {
469 // Send status changed for the main URL, if we cannot get a valid dispatch object.
470 // UI disables the button. Catch exception as we release our mutex, it is possible
471 // that someone else already disposed this instance!
472 FeatureStateEvent aFeatureStateEvent;
473 aFeatureStateEvent.IsEnabled = false;
474 aFeatureStateEvent.FeatureURL = rListener.aURL;
475 aFeatureStateEvent.State = Any();
476 xStatusListener->statusChanged( aFeatureStateEvent );
477 }
478 }
479 catch ( ... ){}
480 }
481}
482
483::tools::Rectangle StatusbarController::getControlRect() const
484{
485 ::tools::Rectangle aRect;
486
487 {
488 SolarMutexGuard aSolarMutexGuard;
489
490 if ( m_bDisposed )
1
Assuming field 'm_bDisposed' is false
→
2
←
Taking false branch
→
491 throw DisposedException();
492
493 if ( m_xParentWindow.is() )
3
←
Taking true branch
→
494 {
495 VclPtr< StatusBar > pStatusBar = dynamic_cast< StatusBar* >( VCLUnoHelper::GetWindow( m_xParentWindow ).get() );
4
←
Calling constructor for 'VclPtr<StatusBar>'
→
9
←
Returning from constructor for 'VclPtr<StatusBar>'
→
10
←
Calling implicit destructor for 'VclPtr<vcl::Window>'
→
11
←
Calling '~Reference'
→
18
←
Returning from '~Reference'
→
19
←
Returning from destructor for 'VclPtr<vcl::Window>'
→
496 if ( pStatusBar && pStatusBar->GetType() == WindowType::STATUSBAR )
20
←
Calling 'VclPtr::operator bool'
→
497 aRect = pStatusBar->GetItemRect( m_nID );
498 }
499 }
500
501 return aRect;
502}
503
504void StatusbarController::execute( const css::uno::Sequence< css::beans::PropertyValue >& aArgs )
505{
506 Reference< XDispatch > xDispatch;
507 Reference< XURLTransformer > xURLTransformer;
508 OUString aCommandURL;
509
510 {
511 SolarMutexGuard aSolarMutexGuard;
512
513 if ( m_bDisposed )
514 throw DisposedException();
515
516 if ( m_bInitialized &&
517 m_xFrame.is() &&
518 m_xContext.is() &&
519 !m_aCommandURL.isEmpty() )
520 {
521 xURLTransformer = getURLTransformer();
522 aCommandURL = m_aCommandURL;
523 URLToDispatchMap::iterator pIter = m_aListenerMap.find( m_aCommandURL );
524 if ( pIter != m_aListenerMap.end() )
525 xDispatch = pIter->second;
526 }
527 }
528
529 if ( !(xDispatch.is() && xURLTransformer.is()) )
530 return;
531
532 try
533 {
534 css::util::URL aTargetURL;
535
536 aTargetURL.Complete = aCommandURL;
537 xURLTransformer->parseStrict( aTargetURL );
538 xDispatch->dispatch( aTargetURL, aArgs );
539 }
540 catch ( DisposedException& )
541 {
542 }
543}
544
545void StatusbarController::execute(
546 const OUString& aCommandURL,
547 const Sequence< css::beans::PropertyValue >& aArgs )
548{
549 Reference< XDispatch > xDispatch;
550 css::util::URL aTargetURL;
551
552 {
553 SolarMutexGuard aSolarMutexGuard;
554
555 if ( m_bDisposed )
556 throw DisposedException();
557
558 if ( m_bInitialized &&
559 m_xFrame.is() &&
560 m_xContext.is() &&
561 !m_aCommandURL.isEmpty() )
562 {
563 Reference< XURLTransformer > xURLTransformer( getURLTransformer() );
564 aTargetURL.Complete = aCommandURL;
565 xURLTransformer->parseStrict( aTargetURL );
566
567 URLToDispatchMap::iterator pIter = m_aListenerMap.find( aCommandURL );
568 if ( pIter != m_aListenerMap.end() )
569 xDispatch = pIter->second;
570 else
571 {
572 Reference< css::frame::XDispatchProvider > xDispatchProvider(
573 m_xFrame->getController(), UNO_QUERY );
574 if ( xDispatchProvider.is() )
575 xDispatch = xDispatchProvider->queryDispatch( aTargetURL, OUString(), 0 );
576 }
577 }
578 }
579
580 if ( xDispatch.is() )
581 {
582 try
583 {
584 xDispatch->dispatch( aTargetURL, aArgs );
585 }
586 catch ( DisposedException& )
587 {
588 }
589 }
590}
591
592} // svt
593
594/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
←

/home/maarten/src/libreoffice/core/include/vcl/vclptr.hxx

→
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#ifndef INCLUDED_VCL_PTR_HXX
21#define INCLUDED_VCL_PTR_HXX
22
23#include <sal/config.h>
24
25#include <rtl/ref.hxx>
26
27#include <utility>
28#include <type_traits>
29
30#ifdef DBG_UTIL
31#ifndef _WIN32
32#include <vcl/vclmain.hxx>
33#endif
34#endif
35
36class VclReferenceBase;
37
38namespace vcl::detail {
39
40template<typename>
41constexpr bool isIncompleteOrDerivedFromVclReferenceBase(...) { return true; }
42
43template<typename T> constexpr bool isIncompleteOrDerivedFromVclReferenceBase(
44 int (*)[sizeof(T)])
45{ return std::is_base_of<VclReferenceBase, T>::value; }
46
47} // namespace vcl::detail
48
49/**
50 * A thin wrapper around rtl::Reference to implement the acquire and dispose semantics we want for references to vcl::Window subclasses.
51 *
52 * For more details on the design please see vcl/README.lifecycle
53 *
54 * @param reference_type must be a subclass of vcl::Window
55 */
56template <class reference_type>
57class VclPtr
58{
59 static_assert(
60 vcl::detail::isIncompleteOrDerivedFromVclReferenceBase<reference_type>(
61 nullptr),
62 "template argument type must be derived from VclReferenceBase");
63
64 ::rtl::Reference<reference_type> m_rInnerRef;
65
66public:
67 /** Constructor...
68 */
69 VclPtr()
70 : m_rInnerRef()
71 {}
72
73 /** Constructor...
74 */
75 VclPtr (reference_type * pBody)
76 : m_rInnerRef(pBody)
5
←
Calling constructor for 'Reference<StatusBar>'
→
8
←
Returning from constructor for 'Reference<StatusBar>'
→
77 {}
78
79 /** Constructor... that doesn't take a ref.
80 */
81 VclPtr (reference_type * pBody, __sal_NoAcquire)
82 : m_rInnerRef(pBody, SAL_NO_ACQUIRE)
83 {}
84
85 /** Up-casting conversion constructor: Copies interface reference.
86
87 Does not work for up-casts to ambiguous bases. For the special case of
88 up-casting to Reference< XInterface >, see the corresponding conversion
89 operator.
90
91 @param rRef another reference
92 */
93 template< class derived_type >
94 VclPtr(
95 const VclPtr< derived_type > & rRef,
96 typename std::enable_if<
97 std::is_base_of<reference_type, derived_type>::value, int>::type
98 = 0 )
99 : m_rInnerRef( static_cast<reference_type*>(rRef) )
100 {
101 }
102
103#if defined(DBG_UTIL) && !defined(_WIN32)
104 virtual ~VclPtr()
105 {
106 assert(m_rInnerRef.get() == nullptr || vclmain::isAlive())(static_cast <bool> (m_rInnerRef.get() == nullptr || vclmain
::isAlive()) ? void (0) : __assert_fail ("m_rInnerRef.get() == nullptr || vclmain::isAlive()"
, "/home/maarten/src/libreoffice/core/include/vcl/vclptr.hxx"
, 106, __extension__ __PRETTY_FUNCTION__));
107 // We can be one of the intermediate counts, but if we are the last
108 // VclPtr keeping this object alive, then something forgot to call dispose().
109 assert((!m_rInnerRef.get() || m_rInnerRef->isDisposed() || m_rInnerRef->getRefCount() > 1)(static_cast <bool> ((!m_rInnerRef.get() || m_rInnerRef
->isDisposed() || m_rInnerRef->getRefCount() > 1) &&
"someone forgot to call dispose()") ? void (0) : __assert_fail
("(!m_rInnerRef.get() || m_rInnerRef->isDisposed() || m_rInnerRef->getRefCount() > 1) && \"someone forgot to call dispose()\""
, "/home/maarten/src/libreoffice/core/include/vcl/vclptr.hxx"
, 110, __extension__ __PRETTY_FUNCTION__))
110 && "someone forgot to call dispose()")(static_cast <bool> ((!m_rInnerRef.get() || m_rInnerRef
->isDisposed() || m_rInnerRef->getRefCount() > 1) &&
"someone forgot to call dispose()") ? void (0) : __assert_fail
("(!m_rInnerRef.get() || m_rInnerRef->isDisposed() || m_rInnerRef->getRefCount() > 1) && \"someone forgot to call dispose()\""
, "/home/maarten/src/libreoffice/core/include/vcl/vclptr.hxx"
, 110, __extension__ __PRETTY_FUNCTION__));
111 }
112 VclPtr(VclPtr const &) = default;
113 VclPtr(VclPtr &&) = default;
114 VclPtr & operator =(VclPtr const &) = default;
115 VclPtr & operator =(VclPtr &&) = default;
116#endif
117
118 /**
119 * A construction helper for VclPtr. Since VclPtr types are created
120 * with a reference-count of one - to help fit into the existing
121 * code-flow; this helps us to construct them easily.
122 *
123 * For more details on the design please see vcl/README.lifecycle
124 *
125 * @tparam reference_type must be a subclass of vcl::Window
126 */
127 template<typename... Arg> [[nodiscard]] static VclPtr< reference_type > Create(Arg &&... arg)
128 {
129 return VclPtr< reference_type >( new reference_type(std::forward<Arg>(arg)...), SAL_NO_ACQUIRE );
130 }
131
132 /** Probably most common used: handle->someBodyOp().
133 */
134 reference_type * operator->() const
135 {
136 return m_rInnerRef.get();
137 }
138
139 /** Get the body. Can be used instead of operator->().
140 I.e. handle->someBodyOp() and handle.get()->someBodyOp()
141 are the same.
142 */
143 reference_type * get() const
144 {
145 return m_rInnerRef.get();
146 }
147
148 void set(reference_type *pBody)
149 {
150 m_rInnerRef.set(pBody);
151 }
152
153 void reset(reference_type *pBody)
154 {
155 m_rInnerRef.set(pBody);
156 }
157
158 /** Up-casting copy assignment operator.
159
160 Does not work for up-casts to ambiguous bases.
161
162 @param rRef another reference
163 */
164 template<typename derived_type>
165 typename std::enable_if<
166 std::is_base_of<reference_type, derived_type>::value,
167 VclPtr &>::type
168 operator =(VclPtr<derived_type> const & rRef)
169 {
170 m_rInnerRef.set(rRef.get());
171 return *this;
172 }
173
174 VclPtr & operator =(reference_type * pBody)
175 {
176 m_rInnerRef.set(pBody);
177 return *this;
178 }
179
180 operator reference_type * () const
181 {
182 return m_rInnerRef.get();
183 }
184
185 explicit operator bool () const
186 {
187 return m_rInnerRef.get() != nullptr;
21
←
Calling 'Reference::get'
→
188 }
189
190 void clear()
191 {
192 m_rInnerRef.clear();
193 }
194
195 void reset()
196 {
197 m_rInnerRef.clear();
198 }
199
200 void disposeAndClear()
201 {
202 // hold it alive for the lifetime of this method
203 ::rtl::Reference<reference_type> aTmp(m_rInnerRef);
204 m_rInnerRef.clear(); // we should use some 'swap' method ideally ;-)
205 if (aTmp.get()) {
206 aTmp->disposeOnce();
207 }
208 }
209
210 /** Needed to place VclPtr's into STL collection.
211 */
212 bool operator< (const VclPtr<reference_type> & handle) const
213 {
214 return (m_rInnerRef < handle.m_rInnerRef);
215 }
216}; // class VclPtr
217
218template<typename T1, typename T2>
219inline bool operator ==(VclPtr<T1> const & p1, VclPtr<T2> const & p2) {
220 return p1.get() == p2.get();
221}
222
223template<typename T> inline bool operator ==(VclPtr<T> const & p1, T const * p2)
224{
225 return p1.get() == p2;
226}
227
228template<typename T> inline bool operator ==(VclPtr<T> const & p1, T * p2) {
229 return p1.get() == p2;
230}
231
232template<typename T> inline bool operator ==(T const * p1, VclPtr<T> const & p2)
233{
234 return p1 == p2.get();
235}
236
237template<typename T> inline bool operator ==(T * p1, VclPtr<T> const & p2) {
238 return p1 == p2.get();
239}
240
241template<typename T1, typename T2>
242inline bool operator !=(VclPtr<T1> const & p1, VclPtr<T2> const & p2) {
243 return !(p1 == p2);
244}
245
246template<typename T> inline bool operator !=(VclPtr<T> const & p1, T const * p2)
247{
248 return !(p1 == p2);
249}
250
251template<typename T> inline bool operator !=(VclPtr<T> const & p1, T * p2) {
252 return !(p1 == p2);
253}
254
255template<typename T> inline bool operator !=(T const * p1, VclPtr<T> const & p2)
256{
257 return !(p1 == p2);
258}
259
260template<typename T> inline bool operator !=(T * p1, VclPtr<T> const & p2) {
261 return !(p1 == p2);
262}
263
264/**
265 * A construction helper for a temporary VclPtr. Since VclPtr types
266 * are created with a reference-count of one - to help fit into
267 * the existing code-flow; this helps us to construct them easily.
268 * see also VclPtr::Create and ScopedVclPtr
269 *
270 * For more details on the design please see vcl/README.lifecycle
271 *
272 * @param reference_type must be a subclass of vcl::Window
273 */
274template <class reference_type>
275class SAL_WARN_UNUSED__attribute__((warn_unused)) VclPtrInstance final : public VclPtr<reference_type>
276{
277public:
278 template<typename... Arg> VclPtrInstance(Arg &&... arg)
279 : VclPtr<reference_type>( new reference_type(std::forward<Arg>(arg)...), SAL_NO_ACQUIRE )
280 {
281 }
282
283 /**
284 * Override and disallow this, to prevent people accidentally calling it and actually
285 * getting VclPtr::Create and getting a naked VclPtr<> instance
286 */
287 template<typename... Arg> static VclPtrInstance< reference_type > Create(Arg &&... ) = delete;
288};
289
290template <class reference_type>
291class ScopedVclPtr : public VclPtr<reference_type>
292{
293public:
294 /** Constructor...
295 */
296 ScopedVclPtr()
297 : VclPtr<reference_type>()
298 {}
299
300 /** Constructor
301 */
302 ScopedVclPtr (reference_type * pBody)
303 : VclPtr<reference_type>(pBody)
304 {}
305
306 /** Copy constructor...
307 */
308 ScopedVclPtr (const VclPtr<reference_type> & handle)
309 : VclPtr<reference_type>(handle)
310 {}
311
312 /**
313 Assignment that releases the last reference.
314 */
315 void disposeAndReset(reference_type *pBody)
316 {
317 if (pBody != this->get()) {
318 VclPtr<reference_type>::disposeAndClear();
319 VclPtr<reference_type>::set(pBody);
320 }
321 }
322
323 /**
324 Assignment that releases the last reference.
325 */
326 ScopedVclPtr<reference_type>& operator = (reference_type * pBody)
327 {
328 disposeAndReset(pBody);
329 return *this;
330 }
331
332 /** Up-casting conversion constructor: Copies interface reference.
333
334 Does not work for up-casts to ambiguous bases. For the special case of
335 up-casting to Reference< XInterface >, see the corresponding conversion
336 operator.
337
338 @param rRef another reference
339 */
340 template< class derived_type >
341 ScopedVclPtr(
342 const VclPtr< derived_type > & rRef,
343 typename std::enable_if<
344 std::is_base_of<reference_type, derived_type>::value, int>::type
345 = 0 )
346 : VclPtr<reference_type>( rRef )
347 {
348 }
349
350 /** Up-casting assignment operator.
351
352 Does not work for up-casts to ambiguous bases.
353
354 @param rRef another VclPtr
355 */
356 template<typename derived_type>
357 typename std::enable_if<
358 std::is_base_of<reference_type, derived_type>::value,
359 ScopedVclPtr &>::type
360 operator =(VclPtr<derived_type> const & rRef)
361 {
362 disposeAndReset(rRef.get());
363 return *this;
364 }
365
366 /**
367 * Override and disallow this, to prevent people accidentally calling it and actually
368 * getting VclPtr::Create and getting a naked VclPtr<> instance
369 */
370 template<typename... Arg> static ScopedVclPtr< reference_type > Create(Arg &&... ) = delete;
371
372 ~ScopedVclPtr()
373 {
374 VclPtr<reference_type>::disposeAndClear();
375 assert(VclPtr<reference_type>::get() == nullptr)(static_cast <bool> (VclPtr<reference_type>::get(
) == nullptr) ? void (0) : __assert_fail ("VclPtr<reference_type>::get() == nullptr"
, "/home/maarten/src/libreoffice/core/include/vcl/vclptr.hxx"
, 375, __extension__ __PRETTY_FUNCTION__)); // make sure there are no lingering references
376 }
377
378private:
379 // Most likely we don't want this default copy-constructor.
380 ScopedVclPtr (const ScopedVclPtr<reference_type> &) = delete;
381 // And certainly we don't want a default assignment operator.
382 ScopedVclPtr<reference_type>& operator = (const ScopedVclPtr<reference_type> &) = delete;
383 // And disallow reset as that doesn't call disposeAndClear on the original reference
384 void reset() = delete;
385 void reset(reference_type *pBody) = delete;
386
387protected:
388 ScopedVclPtr (reference_type * pBody, __sal_NoAcquire)
389 : VclPtr<reference_type>(pBody, SAL_NO_ACQUIRE)
390 {}
391};
392
393/**
394 * A construction helper for ScopedVclPtr. Since VclPtr types are created
395 * with a reference-count of one - to help fit into the existing
396 * code-flow; this helps us to construct them easily.
397 *
398 * For more details on the design please see vcl/README.lifecycle
399 *
400 * @param reference_type must be a subclass of vcl::Window
401 */
402#if defined _MSC_VER
403#pragma warning(push)
404#pragma warning(disable: 4521) // " multiple copy constructors specified"
405#endif
406template <class reference_type>
407class SAL_WARN_UNUSED__attribute__((warn_unused)) ScopedVclPtrInstance final : public ScopedVclPtr<reference_type>
408{
409public:
410 template<typename... Arg> ScopedVclPtrInstance(Arg &&... arg)
411 : ScopedVclPtr<reference_type>( new reference_type(std::forward<Arg>(arg)...), SAL_NO_ACQUIRE )
412 {
413 }
414
415 /**
416 * Override and disallow this, to prevent people accidentally calling it and actually
417 * getting VclPtr::Create and getting a naked VclPtr<> instance
418 */
419 template<typename... Arg> static ScopedVclPtrInstance< reference_type > Create(Arg &&...) = delete;
420
421private:
422 // Prevent the above perfect forwarding ctor from hijacking (accidental)
423 // attempts at ScopedVclPtrInstance copy construction (where the hijacking
424 // would typically lead to somewhat obscure error messages); both non-const
425 // and const variants are needed here, as the ScopedVclPtr base class has a
426 // const--variant copy ctor, so the implicitly declared copy ctor for
427 // ScopedVclPtrInstance would also be the const variant, so non-const copy
428 // construction attempts would be hijacked by the perfect forwarding ctor;
429 // but if we only declared a non-const variant here, the const variant would
430 // no longer be implicitly declared (as there would already be an explicitly
431 // declared copy ctor), so const copy construction attempts would then be
432 // hijacked by the perfect forwarding ctor:
433 ScopedVclPtrInstance(ScopedVclPtrInstance &) = delete;
434 ScopedVclPtrInstance(ScopedVclPtrInstance const &) = delete;
435};
436#if defined _MSC_VER
437#pragma warning(pop)
438#endif
439
440#endif // INCLUDED_VCL_PTR_HXX
441
442/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
←

/home/maarten/src/libreoffice/core/include/rtl/ref.hxx

→
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#ifndef INCLUDED_RTL_REF_HXX
21#define INCLUDED_RTL_REF_HXX
22
23#include "sal/config.h"
24
25#include <cassert>
26#include <cstddef>
27#include <functional>
28#ifdef LIBO_INTERNAL_ONLY1
29#include <type_traits>
30#endif
31
32#include "sal/types.h"
33
34namespace rtl
35{
36
37/** Template reference class for reference type.
38*/
39template <class reference_type>
40class Reference
41{
42 /** The <b>reference_type</b> body pointer.
43 */
44 reference_type * m_pBody;
45
46
47public:
48 /** Constructor...
49 */
50 Reference()
51 : m_pBody (NULL__null)
52 {}
53
54
55 /** Constructor...
56 */
57 Reference (reference_type * pBody, __sal_NoAcquire)
58 : m_pBody (pBody)
59 {
60 }
61
62 /** Constructor...
63 */
64 Reference (reference_type * pBody)
65 : m_pBody (pBody)
66 {
67 if (m_pBody)
6
←
Assuming field 'm_pBody' is non-null
→
7
←
Taking true branch
→
68 m_pBody->acquire();
69 }
70
71 /** Copy constructor...
72 */
73 Reference (const Reference<reference_type> & handle)
74 : m_pBody (handle.m_pBody)
75 {
76 if (m_pBody)
77 m_pBody->acquire();
78 }
79
80#ifdef LIBO_INTERNAL_ONLY1
81 /** Move constructor...
82 */
83 Reference (Reference<reference_type> && handle) noexcept
84 : m_pBody (handle.m_pBody)
85 {
86 handle.m_pBody = nullptr;
87 }
88#endif
89
90#if defined LIBO_INTERNAL_ONLY1
91 /** Up-casting conversion constructor: Copies interface reference.
92
93 Does not work for up-casts to ambiguous bases.
94
95 @param rRef another reference
96 */
97 template< class derived_type >
98 inline Reference(
99 const Reference< derived_type > & rRef,
100 std::enable_if_t<std::is_base_of_v<reference_type, derived_type>, int> = 0 )
101 : m_pBody (rRef.get())
102 {
103 if (m_pBody)
104 m_pBody->acquire();
105 }
106#endif
107
108 /** Destructor...
109 */
110 ~Reference() COVERITY_NOEXCEPT_FALSE
111 {
112 if (m_pBody
11.1
Field 'm_pBody' is non-null
11.1
Field 'm_pBody' is non-null
11.1
Field 'm_pBody' is non-null
11.1
Field 'm_pBody' is non-null
)
12
←
Taking true branch
→
113 m_pBody->release();
13
←
Calling 'VclReferenceBase::release'
→
17
←
Returning; memory was released
→
114 }
115
116 /** Set...
117 Similar to assignment.
118 */
119 Reference<reference_type> &
120 SAL_CALL set (reference_type * pBody)
121 {
122 if (pBody)
123 pBody->acquire();
124 reference_type * const pOld = m_pBody;
125 m_pBody = pBody;
126 if (pOld)
127 pOld->release();
128 return *this;
129 }
130
131 /** Assignment.
132 Unbinds this instance from its body (if bound) and
133 bind it to the body represented by the handle.
134 */
135 Reference<reference_type> &
136 SAL_CALL operator= (const Reference<reference_type> & handle)
137 {
138 return set( handle.m_pBody );
139 }
140
141#ifdef LIBO_INTERNAL_ONLY1
142 /** Assignment.
143 * Unbinds this instance from its body (if bound),
144 * bind it to the body represented by the handle, and
145 * set the body represented by the handle to nullptr.
146 */
147 Reference<reference_type> &
148 operator= (Reference<reference_type> && handle)
149 {
150 // self-movement guts ourself
151 if (m_pBody)
152 m_pBody->release();
153 m_pBody = handle.m_pBody;
154 handle.m_pBody = nullptr;
155 return *this;
156 }
157#endif
158
159 /** Assignment...
160 */
161 Reference<reference_type> &
162 SAL_CALL operator= (reference_type * pBody)
163 {
164 return set( pBody );
165 }
166
167 /** Unbind the body from this handle.
168 Note that for a handle representing a large body,
169 "handle.clear().set(new body());" _might_
170 perform a little bit better than "handle.set(new body());",
171 since in the second case two large objects exist in memory
172 (the old body and the new body).
173 */
174 Reference<reference_type> & SAL_CALL clear()
175 {
176 if (m_pBody)
177 {
178 reference_type * const pOld = m_pBody;
179 m_pBody = NULL__null;
180 pOld->release();
181 }
182 return *this;
183 }
184
185
186 /** Get the body. Can be used instead of operator->().
187 I.e. handle->someBodyOp() and handle.get()->someBodyOp()
188 are the same.
189 */
190 reference_type * SAL_CALL get() const
191 {
192 return m_pBody;
22
←
Use of memory after it is freed
193 }
194
195
196 /** Probably most common used: handle->someBodyOp().
197 */
198 reference_type * SAL_CALL operator->() const
199 {
200 assert(m_pBody != NULL)(static_cast <bool> (m_pBody != __null) ? void (0) : __assert_fail
("m_pBody != NULL", "/home/maarten/src/libreoffice/core/include/rtl/ref.hxx"
, 200, __extension__ __PRETTY_FUNCTION__));
201 return m_pBody;
202 }
203
204
205 /** Allows (*handle).someBodyOp().
206 */
207 reference_type & SAL_CALL operator*() const
208 {
209 assert(m_pBody != NULL)(static_cast <bool> (m_pBody != __null) ? void (0) : __assert_fail
("m_pBody != NULL", "/home/maarten/src/libreoffice/core/include/rtl/ref.hxx"
, 209, __extension__ __PRETTY_FUNCTION__));
210 return *m_pBody;
211 }
212
213
214 /** Returns True if the handle does point to a valid body.
215 */
216 bool SAL_CALL is() const
217 {
218 return (m_pBody != NULL__null);
219 }
220
221#if defined LIBO_INTERNAL_ONLY1
222 /** Returns True if the handle does point to a valid body.
223 */
224 explicit operator bool() const
225 {
226 return is();
227 }
228#endif
229
230 /** Returns True if this points to pBody.
231 */
232 bool SAL_CALL operator== (const reference_type * pBody) const
233 {
234 return (m_pBody == pBody);
235 }
236
237
238 /** Returns True if handle points to the same body.
239 */
240 bool
241 SAL_CALL operator== (const Reference<reference_type> & handle) const
242 {
243 return (m_pBody == handle.m_pBody);
244 }
245
246
247 /** Needed to place References into STL collection.
248 */
249 bool
250 SAL_CALL operator!= (const Reference<reference_type> & handle) const
251 {
252 return (m_pBody != handle.m_pBody);
253 }
254
255
256 /** Needed to place References into STL collection.
257 */
258 bool
259 SAL_CALL operator< (const Reference<reference_type> & handle) const
260 {
261 return (m_pBody < handle.m_pBody);
262 }
263
264
265 /** Needed to place References into STL collection.
266 */
267 bool
268 SAL_CALL operator> (const Reference<reference_type> & handle) const
269 {
270 return (m_pBody > handle.m_pBody);
271 }
272};
273
274} // namespace rtl
275
276#if defined LIBO_INTERNAL_ONLY1
277namespace std
278{
279
280/// @cond INTERNAL
281/**
282 Make rtl::Reference hashable by default for use in STL containers.
283
284 @since LibreOffice 6.3
285*/
286template<typename T>
287struct hash<::rtl::Reference<T>>
288{
289 std::size_t operator()(::rtl::Reference<T> const & s) const
290 { return std::size_t(s.get()); }
291};
292/// @endcond
293
294}
295
296#endif
297
298#endif /* ! INCLUDED_RTL_REF_HXX */
299
300/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
←

/home/maarten/src/libreoffice/core/include/vcl/vclreferencebase.hxx

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#ifndef INCLUDED_VCL_Reference_HXX
20#define INCLUDED_VCL_Reference_HXX
21
22#include <vcl/dllapi.h>
23#include <osl/interlck.h>
24
25class VCL_DLLPUBLIC__attribute__ ((visibility("default"))) VclReferenceBase
26{
27 mutable oslInterlockedCount mnRefCnt;
28
29 template<typename T> friend class VclPtr;
30
31public:
32 void acquire() const
33 {
34 osl_atomic_increment(&mnRefCnt)__sync_add_and_fetch((&mnRefCnt), 1);
35 }
36
37 void release() const
38 {
39 if (osl_atomic_decrement(&mnRefCnt)__sync_sub_and_fetch((&mnRefCnt), 1) == 0)
14
←
Assuming the condition is true
→
15
←
Taking true branch
→
40 delete this;
16
←
Memory is released
→
41 }
42#ifdef DBG_UTIL
43#ifndef _WIN32
44 sal_Int32 getRefCount() const { return mnRefCnt; }
45#endif
46#endif
47
48
49private:
50 VclReferenceBase(const VclReferenceBase&) = delete;
51 VclReferenceBase& operator=(const VclReferenceBase&) = delete;
52
53 bool mbDisposed : 1;
54
55protected:
56 VclReferenceBase();
57protected:
58 virtual ~VclReferenceBase();
59
60protected:
61 virtual void dispose();
62
63public:
64 void disposeOnce();
65 bool isDisposed() const { return mbDisposed; }
66
67};
68#endif