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 SlsLayeredDevice.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 -isystem /usr/include/dbus-1.0 -isystem /usr/lib64/dbus-1.0/include -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 SD_DLLIMPLEMENTATION -D SDUI_DLL_NAME="libsduilo.so" -D SYSTEM_LIBXML -D ENABLE_SDREMOTE -D ENABLE_SDREMOTE_BLUETOOTH -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/external/bluez_bluetooth/inc -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/sd/inc -I /home/maarten/src/libreoffice/core/sd/source/ui/inc -I /home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/inc -I /home/maarten/src/libreoffice/core/workdir/SdiTarget/sd/sdi -I /home/maarten/src/libreoffice/core/workdir/CustomTarget/officecfg/registry -I /home/maarten/src/libreoffice/core/workdir/CustomTarget/oox/generated -I /home/maarten/src/libreoffice/core/workdir/UnoApiHeadersTarget/udkapi/normal -I /home/maarten/src/libreoffice/core/workdir/UnoApiHeadersTarget/offapi/normal -I /usr/include/glib-2.0 -I /usr/lib64/glib-2.0/include -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/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx

/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.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 "SlsLayeredDevice.hxx"
21#include <Window.hxx>
22
23#include <vcl/virdev.hxx>
24#include <sal/log.hxx>
25#include <o3tl/safeint.hxx>
26#include <osl/diagnose.h>
27
28#include <tools/gen.hxx>
29#include <tools/fract.hxx>
30
31#include <functional>
32
33namespace sd::slidesorter::view {
34
35namespace {
36const sal_Int32 gnMaximumLayerCount = 8;
37
38class LayerInvalidator : public ILayerInvalidator
39{
40public:
41 LayerInvalidator (
42 const std::shared_ptr<LayeredDevice>& rpLayeredDevice,
43 sd::Window *pTargetWindow,
44 const int nLayer)
45 : mpLayeredDevice(rpLayeredDevice),
46 mpTargetWindow(pTargetWindow),
47 mnLayer(nLayer)
48 {
49 }
50
51 virtual void Invalidate (const ::tools::Rectangle& rInvalidationBox) override
52 {
53 mpLayeredDevice->Invalidate(rInvalidationBox, mnLayer);
54 mpTargetWindow->Invalidate(rInvalidationBox);
55 }
56
57private:
58 const std::shared_ptr<LayeredDevice> mpLayeredDevice;
59 VclPtr<sd::Window> mpTargetWindow;
60 const int mnLayer;
61};
62
63void DeviceCopy (
64 vcl::RenderContext& rTargetDevice,
65 vcl::RenderContext const & rSourceDevice,
66 const ::tools::Rectangle& rBox)
67{
68 rTargetDevice.DrawOutDev(
69 rBox.TopLeft(),
70 rBox.GetSize(),
71 rBox.TopLeft(),
72 rBox.GetSize(),
73 rSourceDevice);
74}
75
76void ForAllRectangles (const vcl::Region& rRegion, const std::function<void (const ::tools::Rectangle&)>& aFunction)
77{
78 OSL_ASSERT(aFunction)do { if (true && (!(aFunction))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "78" ": "), "OSL_ASSERT: %s", "aFunction"); } } while (false
);
79 RectangleVector aRectangles;
80 rRegion.GetRegionRectangles(aRectangles);
81
82 if(aRectangles.empty())
83 {
84 aFunction(::tools::Rectangle());
85 }
86 else
87 {
88 for(const auto& rRect : aRectangles)
89 {
90 aFunction(rRect);
91 }
92
93 //Region aMutableRegionCopy (rRegion);
94 //RegionHandle aHandle(aMutableRegionCopy.BeginEnumRects());
95 //Rectangle aBox;
96 //while (aMutableRegionCopy.GetEnumRects(aHandle, aBox))
97 // aFunction(aBox);
98 //aMutableRegionCopy.EndEnumRects(aHandle);
99 }
100}
101
102class Layer
103{
104public:
105 Layer();
106 Layer(const Layer&) = delete;
107 Layer& operator=(const Layer&) = delete;
108
109 void Initialize (sd::Window *pTargetWindow);
110 void InvalidateRectangle (const ::tools::Rectangle& rInvalidationBox);
111 void InvalidateRegion (const vcl::Region& rInvalidationRegion);
112 void Validate (const MapMode& rMapMode);
113 void Repaint (
114 OutputDevice& rTargetDevice,
115 const ::tools::Rectangle& rRepaintRectangle);
116 void Resize (const Size& rSize);
117 void AddPainter (const SharedILayerPainter& rpPainter);
118 void RemovePainter (const SharedILayerPainter& rpPainter);
119 bool HasPainter() const;
120 void Dispose();
121
122private:
123 ScopedVclPtr<VirtualDevice> mpLayerDevice;
124 ::std::vector<SharedILayerPainter> maPainters;
125 vcl::Region maInvalidationRegion;
126
127 void ValidateRectangle (const ::tools::Rectangle& rBox);
128};
129typedef std::shared_ptr<Layer> SharedLayer;
130
131} // end of anonymous namespace
132
133class LayeredDevice::LayerContainer
134{
135public:
136 LayerContainer() : mvLayers() {}
137
138 bool empty() const { return mvLayers.empty(); }
139
140 size_t size() const { return mvLayers.size(); }
141
142 const SharedLayer& back() const { return mvLayers.back(); }
143
144 ::std::vector<SharedLayer>::const_iterator begin() const { return mvLayers.begin(); }
145 ::std::vector<SharedLayer>::const_iterator end() const { return mvLayers.end(); }
146
147 void clear() { mvLayers.clear(); }
148
149 void pop_back() { mvLayers.pop_back(); }
150
151 void resize(size_t n) { mvLayers.resize(n); }
152
153 SharedLayer& operator[](size_t i) { return mvLayers[i]; }
154
155private:
156 ::std::vector<SharedLayer> mvLayers;
157};
158
159//===== LayeredDevice =========================================================
160
161LayeredDevice::LayeredDevice (const VclPtr<sd::Window>& pTargetWindow)
162 : mpTargetWindow(pTargetWindow),
163 mpLayers(new LayerContainer()),
164 mpBackBuffer(VclPtr<VirtualDevice>::Create(*mpTargetWindow)),
165 maSavedMapMode(pTargetWindow->GetMapMode())
166{
167 mpBackBuffer->SetOutputSizePixel(mpTargetWindow->GetSizePixel());
168}
169
170LayeredDevice::~LayeredDevice()
171{
172}
1
Calling '~ScopedVclPtr'
→
173
174void LayeredDevice::Invalidate (
175 const ::tools::Rectangle& rInvalidationArea,
176 const sal_Int32 nLayer)
177{
178 if (nLayer<0 || o3tl::make_unsigned(nLayer)>=mpLayers->size())
179 {
180 OSL_ASSERT(nLayer>=0 && o3tl::make_unsigned(nLayer)<mpLayers->size())do { if (true && (!(nLayer>=0 && o3tl::make_unsigned
(nLayer)<mpLayers->size()))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "180" ": "), "OSL_ASSERT: %s", "nLayer>=0 && o3tl::make_unsigned(nLayer)<mpLayers->size()"
); } } while (false);
181 return;
182 }
183
184 (*mpLayers)[nLayer]->InvalidateRectangle(rInvalidationArea);
185}
186
187void LayeredDevice::InvalidateAllLayers (const ::tools::Rectangle& rInvalidationArea)
188{
189 for (size_t nLayer=0; nLayer<mpLayers->size(); ++nLayer)
190 (*mpLayers)[nLayer]->InvalidateRectangle(rInvalidationArea);
191}
192
193void LayeredDevice::InvalidateAllLayers (const vcl::Region& rInvalidationRegion)
194{
195 for (size_t nLayer=0; nLayer<mpLayers->size(); ++nLayer)
196 (*mpLayers)[nLayer]->InvalidateRegion(rInvalidationRegion);
197}
198
199void LayeredDevice::RegisterPainter (
200 const SharedILayerPainter& rpPainter,
201 const sal_Int32 nLayer)
202{
203 OSL_ASSERT(mpLayers)do { if (true && (!(mpLayers))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "203" ": "), "OSL_ASSERT: %s", "mpLayers"); } } while (false
);
204 if ( ! rpPainter)
205 {
206 OSL_ASSERT(rpPainter)do { if (true && (!(rpPainter))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "206" ": "), "OSL_ASSERT: %s", "rpPainter"); } } while (
false);
207 return;
208 }
209 if (nLayer<0 || nLayer>=gnMaximumLayerCount)
210 {
211 OSL_ASSERT(nLayer>=0 && nLayer<gnMaximumLayerCount)do { if (true && (!(nLayer>=0 && nLayer<
gnMaximumLayerCount))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "211" ": "), "OSL_ASSERT: %s", "nLayer>=0 && nLayer<gnMaximumLayerCount"
); } } while (false);
212 return;
213 }
214
215 // Provide the layers.
216 if (o3tl::make_unsigned(nLayer) >= mpLayers->size())
217 {
218 const sal_Int32 nOldLayerCount (mpLayers->size());
219 mpLayers->resize(nLayer+1);
220
221 for (size_t nIndex=nOldLayerCount; nIndex<mpLayers->size(); ++nIndex)
222 (*mpLayers)[nIndex] = std::make_shared<Layer>();
223 }
224
225 (*mpLayers)[nLayer]->AddPainter(rpPainter);
226 if (nLayer == 0)
227 (*mpLayers)[nLayer]->Initialize(mpTargetWindow);
228
229 rpPainter->SetLayerInvalidator(
230 std::make_shared<LayerInvalidator>(shared_from_this(),mpTargetWindow,nLayer));
231}
232
233void LayeredDevice::RemovePainter (
234 const SharedILayerPainter& rpPainter,
235 const sal_Int32 nLayer)
236{
237 if ( ! rpPainter)
238 {
239 OSL_ASSERT(rpPainter)do { if (true && (!(rpPainter))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "239" ": "), "OSL_ASSERT: %s", "rpPainter"); } } while (
false);
240 return;
241 }
242 if (nLayer<0 || o3tl::make_unsigned(nLayer)>=mpLayers->size())
243 {
244 OSL_ASSERT(nLayer>=0 && o3tl::make_unsigned(nLayer)<mpLayers->size())do { if (true && (!(nLayer>=0 && o3tl::make_unsigned
(nLayer)<mpLayers->size()))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "244" ": "), "OSL_ASSERT: %s", "nLayer>=0 && o3tl::make_unsigned(nLayer)<mpLayers->size()"
); } } while (false);
245 return;
246 }
247
248 rpPainter->SetLayerInvalidator(SharedILayerInvalidator());
249
250 (*mpLayers)[nLayer]->RemovePainter(rpPainter);
251
252 // Remove top most layers that do not contain any painters.
253 while ( ! mpLayers->empty() && ! mpLayers->back()->HasPainter())
254 mpLayers->pop_back();
255}
256
257void LayeredDevice::Repaint (const vcl::Region& rRepaintRegion)
258{
259 // Validate the contents of all layers (that have their own devices.)
260 for (auto const& it : *mpLayers)
261 {
262 it->Validate(mpTargetWindow->GetMapMode());
263 }
264
265 ForAllRectangles(rRepaintRegion,
266 [this] (::tools::Rectangle const& r) { this->RepaintRectangle(r); });
267}
268
269void LayeredDevice::RepaintRectangle (const ::tools::Rectangle& rRepaintRectangle)
270{
271 if (mpLayers->empty())
272 return;
273 else if (mpLayers->size() == 1)
274 {
275 // Just copy the main layer into the target device.
276 (*mpLayers)[0]->Repaint(*mpTargetWindow, rRepaintRectangle);
277 }
278 else
279 {
280 // Paint all layers first into the back buffer (to avoid flickering
281 // due to synchronous paints) and then copy that into the target
282 // device.
283 mpBackBuffer->SetMapMode(mpTargetWindow->GetMapMode());
284 for (auto const& it : *mpLayers)
285 {
286 it->Repaint(*mpBackBuffer, rRepaintRectangle);
287 }
288 DeviceCopy(*mpTargetWindow, *mpBackBuffer, rRepaintRectangle);
289 }
290}
291
292void LayeredDevice::Resize()
293{
294 const Size aSize (mpTargetWindow->GetSizePixel());
295 mpBackBuffer->SetOutputSizePixel(aSize);
296 for (auto const& it : *mpLayers)
297 {
298 it->Resize(aSize);
299 }
300}
301
302void LayeredDevice::Dispose()
303{
304 for (auto const& it : *mpLayers)
305 {
306 it->Dispose();
307 }
308 mpLayers->clear();
309}
310
311bool LayeredDevice::HandleMapModeChange()
312{
313 const MapMode& rMapMode (mpTargetWindow->GetMapMode());
314 if (maSavedMapMode == rMapMode)
315 return false;
316
317 const ::tools::Rectangle aLogicWindowBox (
318 mpTargetWindow->PixelToLogic(::tools::Rectangle(Point(0,0), mpTargetWindow->GetSizePixel())));
319 if (maSavedMapMode.GetScaleX() != rMapMode.GetScaleX()
320 || maSavedMapMode.GetScaleY() != rMapMode.GetScaleY()
321 || maSavedMapMode.GetMapUnit() != rMapMode.GetMapUnit())
322 {
323 // When the scale has changed then we have to paint everything.
324 InvalidateAllLayers(aLogicWindowBox);
325 }
326 else if (maSavedMapMode.GetOrigin() != rMapMode.GetOrigin())
327 {
328 // Window has been scrolled. Adapt contents of backbuffers and
329 // layer devices.
330 const Point aDelta (rMapMode.GetOrigin() - maSavedMapMode.GetOrigin());
331 mpBackBuffer->CopyArea(
332 aLogicWindowBox.TopLeft(),
333 mpTargetWindow->PixelToLogic(Point(0,0), maSavedMapMode),
334 aLogicWindowBox.GetSize());
335
336 // Invalidate the area(s) that have been exposed.
337 const ::tools::Rectangle aWindowBox (Point(0,0), mpTargetWindow->GetSizePixel());
338 if (aDelta.Y() < 0)
339 InvalidateAllLayers(mpTargetWindow->PixelToLogic(::tools::Rectangle(
340 aWindowBox.Left(),
341 aWindowBox.Bottom()+aDelta.Y(),
342 aWindowBox.Right(),
343 aWindowBox.Bottom())));
344 else if (aDelta.Y() > 0)
345 InvalidateAllLayers(mpTargetWindow->PixelToLogic(::tools::Rectangle(
346 aWindowBox.Left(),
347 aWindowBox.Top(),
348 aWindowBox.Right(),
349 aWindowBox.Top()+aDelta.Y())));
350 if (aDelta.X() < 0)
351 InvalidateAllLayers(mpTargetWindow->PixelToLogic(::tools::Rectangle(
352 aWindowBox.Right()+aDelta.X(),
353 aWindowBox.Top(),
354 aWindowBox.Right(),
355 aWindowBox.Bottom())));
356 else if (aDelta.X() > 0)
357 InvalidateAllLayers(mpTargetWindow->PixelToLogic(::tools::Rectangle(
358 aWindowBox.Left(),
359 aWindowBox.Top(),
360 aWindowBox.Left()+aDelta.X(),
361 aWindowBox.Bottom())));
362 }
363 else
364 {
365 // Can this happen? Lets trigger a warning when it does.
366 OSL_ASSERT(false)do { if (true && (!(false))) { sal_detail_logFormat((
SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "366" ": "), "OSL_ASSERT: %s", "false"); } } while (false
);
367 }
368
369 maSavedMapMode = rMapMode;
370
371 return true;
372}
373
374//===== Layer =================================================================
375
376Layer::Layer()
377 : mpLayerDevice(),
378 maPainters(),
379 maInvalidationRegion()
380{
381}
382
383void Layer::Initialize (sd::Window *pTargetWindow)
384{
385#if 0
386 (void)pTargetWindow;
387#else
388 if ( ! mpLayerDevice)
389 {
390 mpLayerDevice.disposeAndReset(VclPtr<VirtualDevice>::Create(*pTargetWindow));
391 mpLayerDevice->SetOutputSizePixel(pTargetWindow->GetSizePixel());
392 }
393#endif
394}
395
396void Layer::InvalidateRectangle (const ::tools::Rectangle& rInvalidationBox)
397{
398 maInvalidationRegion.Union(rInvalidationBox);
399}
400
401void Layer::InvalidateRegion (const vcl::Region& rInvalidationRegion)
402{
403 maInvalidationRegion.Union(rInvalidationRegion);
404}
405
406void Layer::Validate (const MapMode& rMapMode)
407{
408 if (mpLayerDevice && ! maInvalidationRegion.IsEmpty())
409 {
410 vcl::Region aRegion (maInvalidationRegion);
411 maInvalidationRegion.SetEmpty();
412
413 mpLayerDevice->SetMapMode(rMapMode);
414 ForAllRectangles(
415 aRegion,
416 [this] (::tools::Rectangle const& r) { return this->ValidateRectangle(r); });
417 }
418}
419
420void Layer::ValidateRectangle (const ::tools::Rectangle& rBox)
421{
422 if ( ! mpLayerDevice)
423 return;
424 const vcl::Region aSavedClipRegion (mpLayerDevice->GetClipRegion());
425 mpLayerDevice->IntersectClipRegion(rBox);
426
427 for (const auto& rxPainter : maPainters)
428 {
429 rxPainter->Paint(*mpLayerDevice, rBox);
430 }
431
432 mpLayerDevice->SetClipRegion(aSavedClipRegion);
433}
434
435void Layer::Repaint (
436 OutputDevice& rTargetDevice,
437 const ::tools::Rectangle& rRepaintRectangle)
438{
439 if (mpLayerDevice)
440 {
441 DeviceCopy(rTargetDevice, *mpLayerDevice, rRepaintRectangle);
442 }
443 else
444 {
445 for (auto const& it : maPainters)
446 {
447 it->Paint(rTargetDevice, rRepaintRectangle);
448 }
449 }
450}
451
452void Layer::Resize (const Size& rSize)
453{
454 if (mpLayerDevice)
455 {
456 mpLayerDevice->SetOutputSizePixel(rSize);
457 maInvalidationRegion = ::tools::Rectangle(Point(0,0), rSize);
458 }
459}
460
461void Layer::AddPainter (const SharedILayerPainter& rpPainter)
462{
463 OSL_ASSERT(::std::find(maPainters.begin(), maPainters.end(), rpPainter) == maPainters.end())do { if (true && (!(::std::find(maPainters.begin(), maPainters
.end(), rpPainter) == maPainters.end()))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "463" ": "), "OSL_ASSERT: %s", "::std::find(maPainters.begin(), maPainters.end(), rpPainter) == maPainters.end()"
); } } while (false);
464
465 maPainters.push_back(rpPainter);
466}
467
468void Layer::RemovePainter (const SharedILayerPainter& rpPainter)
469{
470 const ::std::vector<SharedILayerPainter>::iterator iPainter (
471 ::std::find(maPainters.begin(), maPainters.end(), rpPainter));
472 if (iPainter != maPainters.end())
473 {
474 maPainters.erase(iPainter);
475 }
476 else
477 {
478 SAL_WARN("sd", "LayeredDevice::RemovePainter called for painter that is not registered")do { if (true) { switch (sal_detail_log_report(::SAL_DETAIL_LOG_LEVEL_WARN
, "sd")) { case SAL_DETAIL_LOG_ACTION_IGNORE: break; case SAL_DETAIL_LOG_ACTION_LOG
: if (sizeof ::sal::detail::getResult( ::sal::detail::StreamStart
() << "LayeredDevice::RemovePainter called for painter that is not registered"
) == 1) { ::sal_detail_log( (::SAL_DETAIL_LOG_LEVEL_WARN), ("sd"
), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "478" ": "), ::sal::detail::unwrapStream( ::sal::detail::
StreamStart() << "LayeredDevice::RemovePainter called for painter that is not registered"
), 0); } else { ::std::ostringstream sal_detail_stream; sal_detail_stream
<< "LayeredDevice::RemovePainter called for painter that is not registered"
; ::sal::detail::log( (::SAL_DETAIL_LOG_LEVEL_WARN), ("sd"), (
"/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "478" ": "), sal_detail_stream, 0); }; break; case SAL_DETAIL_LOG_ACTION_FATAL
: if (sizeof ::sal::detail::getResult( ::sal::detail::StreamStart
() << "LayeredDevice::RemovePainter called for painter that is not registered"
) == 1) { ::sal_detail_log( (::SAL_DETAIL_LOG_LEVEL_WARN), ("sd"
), ("/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "478" ": "), ::sal::detail::unwrapStream( ::sal::detail::
StreamStart() << "LayeredDevice::RemovePainter called for painter that is not registered"
), 0); } else { ::std::ostringstream sal_detail_stream; sal_detail_stream
<< "LayeredDevice::RemovePainter called for painter that is not registered"
; ::sal::detail::log( (::SAL_DETAIL_LOG_LEVEL_WARN), ("sd"), (
"/home/maarten/src/libreoffice/core/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx"
":" "478" ": "), sal_detail_stream, 0); }; std::abort(); break
; } } } while (false);
479 }
480}
481
482bool Layer::HasPainter() const
483{
484 return !maPainters.empty();
485}
486
487void Layer::Dispose()
488{
489 maPainters.clear();
490}
491
492} // end of namespace ::sd::slidesorter::view
493
494/* 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();
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);
3
←
Calling copy constructor for 'Reference<VirtualDevice>'
→
6
←
Returning from copy constructor for 'Reference<VirtualDevice>'
→
204 m_rInnerRef.clear(); // we should use some 'swap' method ideally ;-)
7
←
Calling 'Reference::clear'
→
14
←
Returning; memory was released
→
205 if (aTmp.get()) {
15
←
Calling 'Reference::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();
2
←
Calling 'VclPtr::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)
113 m_pBody->release();
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
7.1
Field 'm_pBody' is non-null
7.1
Field 'm_pBody' is non-null
7.1
Field 'm_pBody' is non-null
7.1
Field 'm_pBody' is non-null
)
8
←
Taking true branch
→
177 {
178 reference_type * const pOld = m_pBody;
179 m_pBody = NULL__null;
180 pOld->release();
9
←
Calling 'VclReferenceBase::release'
→
13
←
Returning; memory was released
→
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;
16
←
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)
10
←
Assuming the condition is true
→
11
←
Taking true branch
→
40 delete this;
12
←
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