Bug Summary

File:home/maarten/src/libreoffice/core/reportdesign/source/ui/report/StartMarker.cxx
Warning:line 150, column 22
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 StartMarker.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 EXCEPTIONS_ON -D LIBO_INTERNAL_ONLY -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/reportdesign/inc -I /home/maarten/src/libreoffice/core/reportdesign/source/inc -I /home/maarten/src/libreoffice/core/reportdesign/source/ui/inc -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/reportdesign/source/ui/report/StartMarker.cxx

/home/maarten/src/libreoffice/core/reportdesign/source/ui/report/StartMarker.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#include <StartMarker.hxx>
20#include <UITools.hxx>
21#include <vcl/image.hxx>
22#include <vcl/svapp.hxx>
23#include <bitmaps.hlst>
24#include <ColorChanger.hxx>
25#include <ReportDefines.hxx>
26#include <SectionWindow.hxx>
27#include <helpids.h>
28#include <vcl/event.hxx>
29#include <vcl/help.hxx>
30#include <vcl/gradient.hxx>
31#include <vcl/lineinfo.hxx>
32#include <vcl/settings.hxx>
33
34#include <unotools/syslocale.hxx>
35#include <unotools/localedatawrapper.hxx>
36
37#define CORNER_SPACE5 5
38
39
40namespace rptui
41{
42
43
44Image* OStartMarker::s_pDefCollapsed = nullptr;
45Image* OStartMarker::s_pDefExpanded = nullptr;
46oslInterlockedCount OStartMarker::s_nImageRefCount = 0;
47
48
49OStartMarker::OStartMarker(OSectionWindow* _pParent,const OUString& _sColorEntry)
50: OColorListener(_pParent,_sColorEntry)
51,m_aVRuler(VclPtr<Ruler>::Create(this,WB_VERT))
52,m_aText(VclPtr<FixedText>::Create(this,WB_HYPHENATION))
53,m_aImage(VclPtr<FixedImage>::Create(this,WB_LEFT|WB_TOP|WB_SCALE))
54,m_pParent(_pParent)
55,m_bShowRuler(true)
56{
57 osl_atomic_increment(&s_nImageRefCount)__sync_add_and_fetch((&s_nImageRefCount), 1);
58 initDefaultNodeImages();
59 ImplInitSettings();
60 m_aText->SetHelpId(HID_RPT_START_TITLE"REPORTDESIGN_HID_RPT_START_TITLE");
61 m_aText->SetPaintTransparent(true);
62 m_aImage->SetHelpId(HID_RPT_START_IMAGE"REPORTDESIGN_HID_RPT_START_IMAGE");
63 m_aText->Show();
64 m_aImage->Show();
65 m_aVRuler->Show();
66 m_aVRuler->Activate();
67 m_aVRuler->SetPagePos();
68 m_aVRuler->SetBorders();
69 m_aVRuler->SetIndents();
70 m_aVRuler->SetMargin1();
71 m_aVRuler->SetMargin2();
72 const MeasurementSystem eSystem = SvtSysLocale().GetLocaleData().getMeasurementSystemEnum();
73 m_aVRuler->SetUnit(MeasurementSystem::Metric == eSystem ? FieldUnit::CM : FieldUnit::INCH);
74 EnableChildTransparentMode();
75 SetParentClipMode( ParentClipMode::NoClip );
76 SetPaintTransparent( true );
77}
78
79OStartMarker::~OStartMarker()
80{
81 disposeOnce();
82}
83
84void OStartMarker::dispose()
85{
86 if ( osl_atomic_decrement(&s_nImageRefCount)__sync_sub_and_fetch((&s_nImageRefCount), 1) == 0 )
87 {
88 delete s_pDefCollapsed;
89 s_pDefCollapsed = nullptr;
90 delete s_pDefExpanded;
91 s_pDefExpanded = nullptr;
92 }
93 m_aVRuler.disposeAndClear();
94 m_aText.disposeAndClear();
95 m_aImage.disposeAndClear();
96 m_pParent.clear();
97 OColorListener::dispose();
98}
99
100sal_Int32 OStartMarker::getMinHeight() const
101{
102 Fraction aExtraWidth(long(2 * REPORT_EXTRA_SPACE10));
103 aExtraWidth *= GetMapMode().GetScaleX();
104 return LogicToPixel(Size(0, m_aText->GetTextHeight())).Height() + long(aExtraWidth);
105}
106
107void OStartMarker::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& /*rRect*/)
108{
109 Size aSize(GetOutputSizePixel());
110 const long nCornerWidth = long(CORNER_SPACE5 * double(GetMapMode().GetScaleX()));
111
112 if (isCollapsed())
1
Assuming the condition is true
2
Taking true branch
113 {
114 rRenderContext.SetClipRegion();
115 }
116 else
117 {
118 const long nVRulerWidth = m_aVRuler->GetSizePixel().Width();
119 long nSize = aSize.Width() - nVRulerWidth;
120 aSize.AdjustWidth(nCornerWidth );
121 rRenderContext.SetClipRegion(vcl::Region(rRenderContext.PixelToLogic(tools::Rectangle(Point(),
122 Size(nSize, aSize.Height())))));
123 }
124
125 tools::Rectangle aWholeRect(Point(), aSize);
126 {
127 const ColorChanger aColors(&rRenderContext, m_nTextBoundaries, m_nColor);
128 tools::PolyPolygon aPoly;
129 aPoly.Insert( tools::Polygon(aWholeRect,nCornerWidth,nCornerWidth));
130
131 Color aStartColor(m_nColor);
132 aStartColor.IncreaseLuminance(10);
133 sal_uInt16 nHue = 0;
134 sal_uInt16 nSat = 0;
135 sal_uInt16 nBri = 0;
136 aStartColor.RGBtoHSB(nHue, nSat, nBri);
137 nSat += 40;
138 Color aEndColor(Color::HSBtoRGB(nHue, nSat, nBri));
139 Gradient aGradient(GradientStyle::Linear,aStartColor,aEndColor);
140 aGradient.SetSteps(static_cast<sal_uInt16>(aSize.Height()));
141
142 rRenderContext.DrawGradient(PixelToLogic(aPoly) ,aGradient);
143 }
3
Calling '~ColorChanger'
14
Returning from '~ColorChanger'
144 if (m_bMarked)
15
Assuming field 'm_bMarked' is true
16
Taking true branch
145 {
146 const long nCornerHeight = long(CORNER_SPACE5 * double(GetMapMode().GetScaleY()));
147 tools::Rectangle aRect(Point(nCornerWidth, nCornerHeight),
148 Size(aSize.Width() - nCornerWidth - nCornerWidth,
149 aSize.Height() - nCornerHeight - nCornerHeight));
150 ColorChanger aColors(&rRenderContext, COL_WHITE, COL_WHITE);
17
Use of memory after it is freed
151 rRenderContext.DrawPolyLine( tools::Polygon(rRenderContext.PixelToLogic(aRect)),
152 LineInfo(LineStyle::Solid, 2));
153 }
154}
155
156void OStartMarker::setColor()
157{
158 const Color aColor(m_nColor);
159 Color aTextColor = GetTextColor();
160 if ( aColor.GetLuminance() < 128 )
161 aTextColor = COL_WHITE;
162 m_aText->SetTextColor(aTextColor);
163 m_aText->SetLineColor(m_nColor);
164}
165
166void OStartMarker::MouseButtonUp( const MouseEvent& rMEvt )
167{
168 if ( !rMEvt.IsLeft() )
169 return;
170
171 Point aPos( rMEvt.GetPosPixel());
172
173 const Size aOutputSize = GetOutputSizePixel();
174 if( aPos.X() > aOutputSize.Width() || aPos.Y() > aOutputSize.Height() )
175 return;
176 tools::Rectangle aRect(m_aImage->GetPosPixel(),m_aImage->GetSizePixel());
177 if ( rMEvt.GetClicks() == 2 || aRect.IsInside( aPos ) )
178 {
179 m_bCollapsed = !m_bCollapsed;
180
181 changeImage();
182
183 m_aVRuler->Show(!m_bCollapsed && m_bShowRuler);
184 m_aCollapsedLink.Call(*this);
185 }
186
187 m_pParent->showProperties();
188}
189
190void OStartMarker::changeImage()
191{
192 Image* pImage = m_bCollapsed ? s_pDefCollapsed : s_pDefExpanded;
193 m_aImage->SetImage(*pImage);
194}
195
196void OStartMarker::initDefaultNodeImages()
197{
198 if ( !s_pDefCollapsed )
199 {
200 s_pDefCollapsed = new Image(StockImage::Yes, RID_BMP_TREENODE_COLLAPSED"res/plus.png");
201 s_pDefExpanded = new Image(StockImage::Yes, RID_BMP_TREENODE_EXPANDED"res/minus.png");
202 }
203
204 Image* pImage = m_bCollapsed ? s_pDefCollapsed : s_pDefExpanded;
205 m_aImage->SetImage(*pImage);
206 m_aImage->SetMouseTransparent(true);
207 m_aImage->SetBackground();
208 m_aText->SetBackground();
209 m_aText->SetMouseTransparent(true);
210}
211
212void OStartMarker::ApplySettings(vcl::RenderContext& rRenderContext)
213{
214 rRenderContext.SetBackground();
215 rRenderContext.SetFillColor(Application::GetSettings().GetStyleSettings().GetDialogColor());
216 setColor();
217}
218
219void OStartMarker::ImplInitSettings()
220{
221 ApplySettings(*this);
222}
223
224void OStartMarker::Resize()
225{
226 const Size aOutputSize( GetOutputSizePixel() );
227 const long nOutputWidth = aOutputSize.Width();
228 const long nOutputHeight = aOutputSize.Height();
229
230 const long nVRulerWidth = m_aVRuler->GetSizePixel().Width();
231 const Point aRulerPos(nOutputWidth - nVRulerWidth,0);
232 m_aVRuler->SetPosSizePixel(aRulerPos,Size(nVRulerWidth,nOutputHeight));
233
234 Size aImageSize = m_aImage->GetImage().GetSizePixel();
235 const MapMode& rMapMode = GetMapMode();
236 aImageSize.setWidth( long(aImageSize.Width() * static_cast<double>(rMapMode.GetScaleX())) );
237 aImageSize.setHeight( long(aImageSize.Height() * static_cast<double>(rMapMode.GetScaleY())) );
238
239 long nExtraWidth = long(REPORT_EXTRA_SPACE10 * rMapMode.GetScaleX());
240
241 Point aPos(aImageSize.Width() + (nExtraWidth * 2), nExtraWidth);
242 const long nHeight = ::std::max<sal_Int32>(nOutputHeight - 2*aPos.Y(),LogicToPixel(Size(0,m_aText->GetTextHeight())).Height());
243 m_aText->SetPosSizePixel(aPos,Size(aRulerPos.X() - aPos.X(),nHeight));
244
245 aPos.setX( nExtraWidth );
246 aPos.AdjustY(static_cast<sal_Int32>((LogicToPixel(Size(0,m_aText->GetTextHeight())).Height() - aImageSize.Height()) * 0.5) ) ;
247 m_aImage->SetPosSizePixel(aPos,aImageSize);
248}
249
250void OStartMarker::setTitle(const OUString& _sTitle)
251{
252 m_aText->SetText(_sTitle);
253}
254
255void OStartMarker::Notify(SfxBroadcaster & rBc, SfxHint const & rHint)
256{
257 OColorListener::Notify(rBc, rHint);
258 if (rHint.GetId() == SfxHintId::ColorsChanged)
259 {
260 setColor();
261 Invalidate(InvalidateFlags::Children);
262 }
263}
264
265void OStartMarker::showRuler(bool _bShow)
266{
267 m_bShowRuler = _bShow;
268 m_aVRuler->Show(!m_bCollapsed && m_bShowRuler);
269}
270
271void OStartMarker::RequestHelp( const HelpEvent& rHEvt )
272{
273 if( m_aText->GetText().isEmpty())
274 return;
275
276 // show help
277 tools::Rectangle aItemRect(rHEvt.GetMousePosPixel(),Size(GetSizePixel().Width(),getMinHeight()));
278 Point aPt = OutputToScreenPixel( aItemRect.TopLeft() );
279 aItemRect.SetLeft( aPt.X() );
280 aItemRect.SetTop( aPt.Y() );
281 aPt = OutputToScreenPixel( aItemRect.BottomRight() );
282 aItemRect.SetRight( aPt.X() );
283 aItemRect.SetBottom( aPt.Y() );
284 if( rHEvt.GetMode() == HelpEventMode::BALLOON )
285 Help::ShowBalloon( this, aItemRect.Center(), aItemRect, m_aText->GetText());
286 else
287 Help::ShowQuickHelp( this, aItemRect, m_aText->GetText() );
288}
289
290void OStartMarker::setCollapsed(bool _bCollapsed)
291{
292 OColorListener::setCollapsed(_bCollapsed);
293 showRuler(_bCollapsed);
294 changeImage();
295}
296
297void OStartMarker::zoom(const Fraction& _aZoom)
298{
299 setZoomFactor(_aZoom,*this);
300 m_aVRuler->SetZoom(_aZoom);
301 setZoomFactor(_aZoom, *m_aText);
302 Resize();
303 Invalidate();
304}
305
306
307}
308
309
310/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

/home/maarten/src/libreoffice/core/reportdesign/source/ui/inc/ColorChanger.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_REPORTDESIGN_SOURCE_UI_INC_COLORCHANGER_HXX
20#define INCLUDED_REPORTDESIGN_SOURCE_UI_INC_COLORCHANGER_HXX
21
22#include <vcl/outdev.hxx>
23
24namespace rptui
25{
26
27 //= ColorChanger
28
29 class ColorChanger final
30 {
31 VclPtr<OutputDevice> m_pDev;
32
33 public:
34 ColorChanger( OutputDevice* _pDev, const Color& _rNewLineColor, const Color& _rNewFillColor )
35 :m_pDev( _pDev )
36 {
37 m_pDev->Push( PushFlags::LINECOLOR | PushFlags::FILLCOLOR );
38 m_pDev->SetLineColor( _rNewLineColor );
39 m_pDev->SetFillColor( _rNewFillColor );
40 }
41
42 ~ColorChanger()
43 {
44 m_pDev->Pop();
45 }
4
Calling implicit destructor for 'VclPtr<OutputDevice>'
5
Calling '~Reference'
12
Returning from '~Reference'
13
Returning from destructor for 'VclPtr<OutputDevice>'
46 };
47}
48#endif // INCLUDED_REPORTDESIGN_SOURCE_UI_INC_COLORCHANGER_HXX
49
50/* 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)
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
5.1
Field 'm_pBody' is non-null
5.1
Field 'm_pBody' is non-null
5.1
Field 'm_pBody' is non-null
5.1
Field 'm_pBody' is non-null
)
6
Taking true branch
113 m_pBody->release();
7
Calling 'VclReferenceBase::release'
11
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;
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)
8
Assuming the condition is true
9
Taking true branch
40 delete this;
10
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