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 iframe.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 -isystem /usr/include/libxml2 -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 SFX2_DLLIMPLEMENTATION -D ENABLE_CUPS -D SYSTEM_LIBXML -D EXCEPTIONS_ON -D LIBO_INTERNAL_ONLY -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/liborcus/include -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/liborcus/include -I /home/maarten/src/libreoffice/core/external/boost/include -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/boost -I /home/maarten/src/libreoffice/core/sfx2/inc -I /home/maarten/src/libreoffice/core/sfx2/source/inc -I /home/maarten/src/libreoffice/core/workdir/SdiTarget/sfx2/sdi -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 -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/sfx2/source/doc/iframe.cxx

/home/maarten/src/libreoffice/core/sfx2/source/doc/iframe.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 <sal/config.h>
21
22#include <com/sun/star/awt/XWindowPeer.hpp>
23#include <com/sun/star/frame/XDispatch.hpp>
24#include <com/sun/star/frame/Frame.hpp>
25#include <com/sun/star/frame/XFrame2.hpp>
26#include <com/sun/star/frame/XSynchronousFrameLoader.hpp>
27#include <com/sun/star/util/URLTransformer.hpp>
28#include <com/sun/star/util/XURLTransformer.hpp>
29#include <com/sun/star/util/XCloseable.hpp>
30#include <com/sun/star/lang/XEventListener.hpp>
31#include <com/sun/star/lang/XServiceInfo.hpp>
32#include <com/sun/star/beans/XPropertySet.hpp>
33#include <com/sun/star/ui/dialogs/XExecutableDialog.hpp>
34#include <com/sun/star/embed/XEmbeddedObject.hpp>
35
36#include <cppuhelper/implbase.hxx>
37#include <cppuhelper/supportsservice.hxx>
38#include <svtools/miscopt.hxx>
39#include <svl/itemprop.hxx>
40#include <sfx2/frmdescr.hxx>
41#include <sfx2/sfxdlg.hxx>
42#include <toolkit/helper/vclunohelper.hxx>
43#include <vcl/window.hxx>
44#include <tools/debug.hxx>
45
46using namespace ::com::sun::star;
47
48namespace {
49
50class IFrameObject : public ::cppu::WeakImplHelper <
51 css::util::XCloseable,
52 css::lang::XEventListener,
53 css::frame::XSynchronousFrameLoader,
54 css::ui::dialogs::XExecutableDialog,
55 css::lang::XServiceInfo,
56 css::beans::XPropertySet >
57{
58 css::uno::Reference < css::uno::XComponentContext > mxContext;
59 css::uno::Reference < css::frame::XFrame2 > mxFrame;
60 css::uno::Reference < css::embed::XEmbeddedObject > mxObj;
61 SfxItemPropertyMap maPropMap;
62 SfxFrameDescriptor maFrmDescr;
63
64public:
65 /// @throws css::uno::Exception
66 /// @throws css::uno::RuntimeException
67 IFrameObject(const css::uno::Reference < css::uno::XComponentContext>& rxContext, const css::uno::Sequence< css::uno::Any >& aArguments);
68
69 virtual OUString SAL_CALL getImplementationName() override
70 {
71 return "com.sun.star.comp.sfx2.IFrameObject";
72 }
73
74 virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override
75 {
76 return cppu::supportsService(this, ServiceName);
77 }
78
79 virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override
80 {
81 css::uno::Sequence< OUString > aSeq { "com.sun.star.frame.SpecialEmbeddedObject" };
82 return aSeq;
83 }
84
85 virtual sal_Bool SAL_CALL load( const css::uno::Sequence < css::beans::PropertyValue >& lDescriptor,
86 const css::uno::Reference < css::frame::XFrame >& xFrame ) override;
87 virtual void SAL_CALL cancel() override;
88 virtual void SAL_CALL close( sal_Bool bDeliverOwnership ) override;
89 virtual void SAL_CALL addCloseListener( const css::uno::Reference < css::util::XCloseListener >& xListener ) override;
90 virtual void SAL_CALL removeCloseListener( const css::uno::Reference < css::util::XCloseListener >& xListener ) override;
91 virtual void SAL_CALL disposing( const css::lang::EventObject& aEvent ) override ;
92 virtual void SAL_CALL setTitle( const OUString& aTitle ) override;
93 virtual ::sal_Int16 SAL_CALL execute( ) override;
94 virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL getPropertySetInfo() override;
95 virtual void SAL_CALL addPropertyChangeListener(const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener > & aListener) override;
96 virtual void SAL_CALL removePropertyChangeListener(const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener > & aListener) override;
97 virtual void SAL_CALL addVetoableChangeListener(const OUString& aPropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener > & aListener) override;
98 virtual void SAL_CALL removeVetoableChangeListener(const OUString& aPropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener > & aListener) override;
99 virtual void SAL_CALL setPropertyValue( const OUString& aPropertyName, const css::uno::Any& aValue ) override;
100 virtual css::uno::Any SAL_CALL getPropertyValue( const OUString& PropertyName ) override;
101};
102
103class IFrameWindow_Impl : public vcl::Window
104{
105public:
106 IFrameWindow_Impl( vcl::Window *pParent, bool bHasBorder );
107};
108
109IFrameWindow_Impl::IFrameWindow_Impl( vcl::Window *pParent, bool bHasBorder )
110 : Window( pParent, WB_CLIPCHILDREN | WB_NODIALOGCONTROL )
111{
112 if ( !bHasBorder )
113 SetBorderStyle( WindowBorderStyle::NOBORDER );
114 else
115 SetBorderStyle( WindowBorderStyle::NORMAL );
116}
117
118#define PROPERTY_UNBOUND0 0
119
120#define WID_FRAME_URL1 1
121#define WID_FRAME_NAME2 2
122#define WID_FRAME_IS_AUTO_SCROLL3 3
123#define WID_FRAME_IS_SCROLLING_MODE4 4
124#define WID_FRAME_IS_BORDER5 5
125#define WID_FRAME_IS_AUTO_BORDER6 6
126#define WID_FRAME_MARGIN_WIDTH7 7
127#define WID_FRAME_MARGIN_HEIGHT8 8
128
129const SfxItemPropertyMapEntry* lcl_GetIFramePropertyMap_Impl()
130{
131 static const SfxItemPropertyMapEntry aIFramePropertyMap_Impl[] =
132 {
133 { u"FrameIsAutoBorder", WID_FRAME_IS_AUTO_BORDER6, cppu::UnoType<bool>::get(), PROPERTY_UNBOUND0, 0 },
134 { u"FrameIsAutoScroll", WID_FRAME_IS_AUTO_SCROLL3, cppu::UnoType<bool>::get(), PROPERTY_UNBOUND0, 0 },
135 { u"FrameIsBorder", WID_FRAME_IS_BORDER5, cppu::UnoType<bool>::get(), PROPERTY_UNBOUND0, 0 },
136 { u"FrameIsScrollingMode", WID_FRAME_IS_SCROLLING_MODE4,cppu::UnoType<bool>::get(), PROPERTY_UNBOUND0, 0 },
137 { u"FrameMarginHeight", WID_FRAME_MARGIN_HEIGHT8, cppu::UnoType<sal_Int32>::get(), PROPERTY_UNBOUND0, 0 },
138 { u"FrameMarginWidth", WID_FRAME_MARGIN_WIDTH7, cppu::UnoType<sal_Int32>::get(), PROPERTY_UNBOUND0, 0 },
139 { u"FrameName", WID_FRAME_NAME2, cppu::UnoType<OUString>::get(), PROPERTY_UNBOUND0, 0 },
140 { u"FrameURL", WID_FRAME_URL1, cppu::UnoType<OUString>::get(), PROPERTY_UNBOUND0, 0 },
141 { u"", 0, css::uno::Type(), 0, 0 }
142 };
143 return aIFramePropertyMap_Impl;
144}
145
146IFrameObject::IFrameObject(const uno::Reference < uno::XComponentContext >& rxContext, const css::uno::Sequence< css::uno::Any >& aArguments)
147 : mxContext( rxContext )
148 , maPropMap( lcl_GetIFramePropertyMap_Impl() )
149{
150 if ( aArguments.hasElements() )
151 aArguments[0] >>= mxObj;
152}
153
154sal_Bool SAL_CALL IFrameObject::load(
155 const uno::Sequence < css::beans::PropertyValue >& /*lDescriptor*/,
156 const uno::Reference < frame::XFrame >& xFrame )
157{
158 if ( SvtMiscOptions().IsPluginsEnabled() )
159 {
160 DBG_ASSERT( !mxFrame.is(), "Frame already existing!" )do { if (true && (!(!mxFrame.is()))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.tools"), ("/home/maarten/src/libreoffice/core/sfx2/source/doc/iframe.cxx"
":" "160" ": "), "%s", "Frame already existing!"); } } while
(false);
161 VclPtr<vcl::Window> pParent = VCLUnoHelper::GetWindow( xFrame->getContainerWindow() );
162 VclPtr<IFrameWindow_Impl> pWin = VclPtr<IFrameWindow_Impl>::Create( pParent, maFrmDescr.IsFrameBorderOn() );
163 pWin->SetSizePixel( pParent->GetOutputSizePixel() );
164 pWin->SetBackground();
165 pWin->Show();
166
167 uno::Reference < awt::XWindow > xWindow( pWin->GetComponentInterface(), uno::UNO_QUERY );
168 xFrame->setComponent( xWindow, uno::Reference < frame::XController >() );
169
170 // we must destroy the IFrame before the parent is destroyed
171 xWindow->addEventListener( this );
172
173 mxFrame = frame::Frame::create( mxContext );
174 uno::Reference < awt::XWindow > xWin( pWin->GetComponentInterface(), uno::UNO_QUERY );
175 mxFrame->initialize( xWin );
176 mxFrame->setName( maFrmDescr.GetName() );
177
178 uno::Reference < frame::XFramesSupplier > xFramesSupplier( xFrame, uno::UNO_QUERY );
179 if ( xFramesSupplier.is() )
180 mxFrame->setCreator( xFramesSupplier );
181
182 util::URL aTargetURL;
183 aTargetURL.Complete = maFrmDescr.GetURL().GetMainURL( INetURLObject::DecodeMechanism::NONE );
184 uno::Reference < util::XURLTransformer > xTrans( util::URLTransformer::create( mxContext ) );
185 xTrans->parseStrict( aTargetURL );
186
187 uno::Sequence < beans::PropertyValue > aProps(2);
188 aProps[0].Name = "PluginMode";
189 aProps[0].Value <<= sal_Int16(2);
190 aProps[1].Name = "ReadOnly";
191 aProps[1].Value <<= true;
192 uno::Reference < frame::XDispatch > xDisp = mxFrame->queryDispatch( aTargetURL, "_self", 0 );
193 if ( xDisp.is() )
194 xDisp->dispatch( aTargetURL, aProps );
195
196 return true;
197 }
198
199 return false;
200}
201
202void SAL_CALL IFrameObject::cancel()
203{
204 try
205 {
206 uno::Reference < util::XCloseable > xClose( mxFrame, uno::UNO_QUERY );
207 if ( xClose.is() )
208 xClose->close( true );
209 mxFrame = nullptr;
210 }
211 catch (const uno::Exception&)
212 {
213 }
214}
215
216void SAL_CALL IFrameObject::close( sal_Bool /*bDeliverOwnership*/ )
217{
218}
219
220void SAL_CALL IFrameObject::addCloseListener( const css::uno::Reference < css::util::XCloseListener >& )
221{
222}
223
224void SAL_CALL IFrameObject::removeCloseListener( const css::uno::Reference < css::util::XCloseListener >& )
225{
226}
227
228void SAL_CALL IFrameObject::disposing( const css::lang::EventObject& )
229{
230 cancel();
231}
232
233uno::Reference< beans::XPropertySetInfo > SAL_CALL IFrameObject::getPropertySetInfo()
234{
235 static uno::Reference< beans::XPropertySetInfo > xInfo = new SfxItemPropertySetInfo( maPropMap );
236 return xInfo;
237}
238
239void SAL_CALL IFrameObject::setPropertyValue(const OUString& aPropertyName, const uno::Any& aAny)
240{
241 const SfxItemPropertySimpleEntry* pEntry = maPropMap.getByName( aPropertyName );
242 if( !pEntry )
243 throw beans::UnknownPropertyException(aPropertyName);
244 switch( pEntry->nWID )
245 {
246 case WID_FRAME_URL1:
247 {
248 OUString aURL;
249 aAny >>= aURL;
250 maFrmDescr.SetURL( aURL );
251 }
252 break;
253 case WID_FRAME_NAME2:
254 {
255 OUString aName;
256 if ( aAny >>= aName )
257 maFrmDescr.SetName( aName );
258 }
259 break;
260 case WID_FRAME_IS_AUTO_SCROLL3:
261 {
262 bool bIsAutoScroll;
263 if ( (aAny >>= bIsAutoScroll) && bIsAutoScroll )
264 maFrmDescr.SetScrollingMode( ScrollingMode::Auto );
265 }
266 break;
267 case WID_FRAME_IS_SCROLLING_MODE4:
268 {
269 bool bIsScroll;
270 if ( aAny >>= bIsScroll )
271 maFrmDescr.SetScrollingMode( bIsScroll ? ScrollingMode::Yes : ScrollingMode::No );
272 }
273 break;
274 case WID_FRAME_IS_BORDER5:
275 {
276 bool bIsBorder;
277 if ( aAny >>= bIsBorder )
278 maFrmDescr.SetFrameBorder( bIsBorder );
279 }
280 break;
281 case WID_FRAME_IS_AUTO_BORDER6:
282 {
283 bool bIsAutoBorder;
284 if ( aAny >>= bIsAutoBorder )
285 {
286 bool bBorder = maFrmDescr.IsFrameBorderOn();
287 maFrmDescr.ResetBorder();
288 if ( bIsAutoBorder )
289 maFrmDescr.SetFrameBorder( bBorder );
290 }
291 }
292 break;
293 case WID_FRAME_MARGIN_WIDTH7:
294 {
295 sal_Int32 nMargin = 0;
296 Size aSize = maFrmDescr.GetMargin();
297 if ( aAny >>= nMargin )
298 {
299 aSize.setWidth( nMargin );
300 maFrmDescr.SetMargin( aSize );
301 }
302 }
303 break;
304 case WID_FRAME_MARGIN_HEIGHT8:
305 {
306 sal_Int32 nMargin = 0;
307 Size aSize = maFrmDescr.GetMargin();
308 if ( aAny >>= nMargin )
309 {
310 aSize.setHeight( nMargin );
311 maFrmDescr.SetMargin( aSize );
312 }
313 }
314 break;
315 default: ;
316 }
317}
318
319uno::Any SAL_CALL IFrameObject::getPropertyValue(const OUString& aPropertyName)
320{
321 const SfxItemPropertySimpleEntry* pEntry = maPropMap.getByName( aPropertyName );
322 if( !pEntry )
323 throw beans::UnknownPropertyException(aPropertyName);
324 uno::Any aAny;
325 switch( pEntry->nWID )
326 {
327 case WID_FRAME_URL1:
328 {
329 aAny <<= maFrmDescr.GetURL().GetMainURL( INetURLObject::DecodeMechanism::NONE );
330 }
331 break;
332 case WID_FRAME_NAME2:
333 {
334 aAny <<= maFrmDescr.GetName();
335 }
336 break;
337 case WID_FRAME_IS_AUTO_SCROLL3:
338 {
339 bool bIsAutoScroll = ( maFrmDescr.GetScrollingMode() == ScrollingMode::Auto );
340 aAny <<= bIsAutoScroll;
341 }
342 break;
343 case WID_FRAME_IS_SCROLLING_MODE4:
344 {
345 bool bIsScroll = ( maFrmDescr.GetScrollingMode() == ScrollingMode::Yes );
346 aAny <<= bIsScroll;
347 }
348 break;
349 case WID_FRAME_IS_BORDER5:
350 {
351 bool bIsBorder = maFrmDescr.IsFrameBorderOn();
352 aAny <<= bIsBorder;
353 }
354 break;
355 case WID_FRAME_IS_AUTO_BORDER6:
356 {
357 bool bIsAutoBorder = !maFrmDescr.IsFrameBorderSet();
358 aAny <<= bIsAutoBorder;
359 }
360 break;
361 case WID_FRAME_MARGIN_WIDTH7:
362 {
363 aAny <<= static_cast<sal_Int32>(maFrmDescr.GetMargin().Width());
364 }
365 break;
366 case WID_FRAME_MARGIN_HEIGHT8:
367 {
368 aAny <<= static_cast<sal_Int32>(maFrmDescr.GetMargin().Height());
369 }
370 break;
371 default: ;
372 }
373 return aAny;
374}
375
376void SAL_CALL IFrameObject::addPropertyChangeListener(const OUString&, const css::uno::Reference< css::beans::XPropertyChangeListener > & )
377{
378}
379
380void SAL_CALL IFrameObject::removePropertyChangeListener(const OUString&, const css::uno::Reference< css::beans::XPropertyChangeListener > & )
381{
382}
383
384void SAL_CALL IFrameObject::addVetoableChangeListener(const OUString&, const css::uno::Reference< css::beans::XVetoableChangeListener > & )
385{
386}
387
388void SAL_CALL IFrameObject::removeVetoableChangeListener(const OUString&, const css::uno::Reference< css::beans::XVetoableChangeListener > & )
389{
390}
391
392::sal_Int16 SAL_CALL IFrameObject::execute()
393{
394 SfxAbstractDialogFactory* pFact = SfxAbstractDialogFactory::Create();
395 //we really should set a parent here
396 ScopedVclPtr<VclAbstractDialog> pDlg(pFact->CreateEditObjectDialog(nullptr, ".uno:InsertObjectFloatingFrame", mxObj));
1
Calling constructor for 'ScopedVclPtr<VclAbstractDialog>'
→
8
←
Returning from constructor for 'ScopedVclPtr<VclAbstractDialog>'
→
9
←
Calling implicit destructor for 'VclPtr<VclAbstractDialog>'
→
10
←
Calling '~Reference'
→
17
←
Returning from '~Reference'
→
18
←
Returning from destructor for 'VclPtr<VclAbstractDialog>'
→
397 pDlg->Execute();
19
←
Calling 'VclPtr::operator->'
→
398 return 0;
399}
400
401void SAL_CALL IFrameObject::setTitle( const OUString& )
402{
403}
404
405}
406
407extern "C" SAL_DLLPUBLIC_EXPORT__attribute__ ((visibility("default"))) css::uno::XInterface *
408com_sun_star_comp_sfx2_IFrameObject_get_implementation(
409 css::uno::XComponentContext *context,
410 css::uno::Sequence<css::uno::Any> const &arguments)
411{
412 return cppu::acquire(new IFrameObject(context, arguments));
413}
414
415/* 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)
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();
20
←
Calling 'Reference::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;
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)
2
←
Calling implicit copy constructor for 'VclPtr<VclAbstractDialog>'
→
3
←
Calling copy constructor for 'Reference<VclAbstractDialog>'
→
6
←
Returning from copy constructor for 'Reference<VclAbstractDialog>'
→
7
←
Returning from copy constructor for 'VclPtr<VclAbstractDialog>'
→
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)
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)
4
←
Assuming field 'm_pBody' is non-null
→
5
←
Taking true branch
→
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
10.1
Field 'm_pBody' is non-null
10.1
Field 'm_pBody' is non-null
10.1
Field 'm_pBody' is non-null
10.1
Field 'm_pBody' is non-null
)
11
←
Taking true branch
→
113 m_pBody->release();
12
←
Calling 'VclReferenceBase::release'
→
16
←
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;
21
←
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)
13
←
Assuming the condition is true
→
14
←
Taking true branch
→
40 delete this;
15
←
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