/home/maarten/src/libreoffice/core/framework/source/uiconfiguration/imagemanagerimpl.cxx

Bug Summary

File:	home/maarten/src/libreoffice/core/framework/source/uiconfiguration/imagemanagerimpl.cxx
Warning:	line 730, column 22 Called C++ object pointer is null

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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 imagemanagerimpl.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 FWK_DLLIMPLEMENTATION -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/framework/source/inc -I /home/maarten/src/libreoffice/core/framework/inc -I /home/maarten/src/libreoffice/core/workdir/CustomTarget/officecfg/registry -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/framework/source/uiconfiguration/imagemanagerimpl.cxx

/home/maarten/src/libreoffice/core/framework/source/uiconfiguration/imagemanagerimpl.cxx

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1/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
*   Licensed to the Apache Software Foundation (ASF) under one or more
*   contributor license agreements. See the NOTICE file distributed
*   with this work for additional information regarding copyright
*   ownership. The ASF licenses this file to you under the Apache
*   License, Version 2.0 (the "License"); you may not use this file
*   except in compliance with the License. You may obtain a copy of
*   the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/

20#include "imagemanagerimpl.hxx"
21#include <xml/imagesconfiguration.hxx>
22#include <uiconfiguration/imagetype.hxx>
23#include <uiconfiguration/graphicnameaccess.hxx>

25#include <properties.h>

27#include <com/sun/star/frame/theUICommandDescription.hpp>
28#include <com/sun/star/ui/ConfigurationEvent.hpp>
29#include <com/sun/star/lang/DisposedException.hpp>
30#include <com/sun/star/lang/IllegalAccessException.hpp>
31#include <com/sun/star/beans/XPropertySet.hpp>
32#include <com/sun/star/beans/PropertyValue.hpp>
33#include <com/sun/star/embed/ElementModes.hpp>
34#include <com/sun/star/embed/InvalidStorageException.hpp>
35#include <com/sun/star/embed/StorageWrappedTargetException.hpp>
36#include <com/sun/star/io/IOException.hpp>
37#include <com/sun/star/io/XStream.hpp>
38#include <com/sun/star/ui/ImageType.hpp>
39#include <vcl/graph.hxx>
40#include <vcl/svapp.hxx>
41#include <o3tl/enumrange.hxx>
42#include <osl/mutex.hxx>
43#include <comphelper/sequence.hxx>
44#include <unotools/ucbstreamhelper.hxx>
45#include <vcl/pngread.hxx>
46#include <vcl/pngwrite.hxx>
47#include <rtl/instance.hxx>
48#include <memory>

50using ::com::sun::star::uno::Sequence;
51using ::com::sun::star::uno::XInterface;
52using ::com::sun::star::uno::RuntimeException;
53using ::com::sun::star::uno::UNO_QUERY;
54using ::com::sun::star::uno::Any;
55using ::com::sun::star::graphic::XGraphic;
56using namespace ::com::sun::star;
57using namespace ::com::sun::star::io;
58using namespace ::com::sun::star::embed;
59using namespace ::com::sun::star::lang;
60using namespace ::com::sun::star::container;
61using namespace ::com::sun::star::beans;
62using namespace ::com::sun::star::ui;
63using namespace ::cppu;

65const sal_Int16 MAX_IMAGETYPE_VALUE       = css::ui::ImageType::SIZE_32;

67const char   IMAGE_FOLDER[]        = "images";
68const char   BITMAPS_FOLDER[]      = "Bitmaps";

70const o3tl::enumarray<vcl::ImageType, const char*> IMAGELIST_XML_FILE =
71{
  "sc_imagelist.xml",
  "lc_imagelist.xml",
  "xc_imagelist.xml"
75};

77const o3tl::enumarray<vcl::ImageType, const char*> BITMAP_FILE_NAMES =
78{
  "sc_userimages.png",
  "lc_userimages.png",
  "xc_userimages.png"
82};

84namespace framework
85{

87static GlobalImageList*     pGlobalImageList = nullptr;

89namespace
90{
  class theGlobalImageListMutex
      : public rtl::Static<osl::Mutex, theGlobalImageListMutex> {};
93}

95static osl::Mutex& getGlobalImageListMutex()
96{
  return theGlobalImageListMutex::get();
98}

100static GlobalImageList* getGlobalImageList( const uno::Reference< uno::XComponentContext >& rxContext )
101{
  osl::MutexGuard guard( getGlobalImageListMutex() );

  if ( pGlobalImageList == nullptr )
      pGlobalImageList = new GlobalImageList( rxContext );

  return pGlobalImageList;
108}

110CmdImageList::CmdImageList( const uno::Reference< uno::XComponentContext >& rxContext, const OUString& aModuleIdentifier ) :
  m_bInitialized(false),
  m_aModuleIdentifier( aModuleIdentifier ),
  m_xContext( rxContext )
114{
115}

117CmdImageList::~CmdImageList()
118{
119}

121void CmdImageList::initialize()
122{
  if (m_bInitialized)
      return;

  const OUString aCommandImageList(UICOMMANDDESCRIPTION_NAMEACCESS_COMMANDIMAGELIST"private:resource/image/commandimagelist");

  Sequence<OUString> aCommandImageSeq;
  uno::Reference<XNameAccess> xCommandDesc = frame::theUICommandDescription::get(m_xContext);

  if (!m_aModuleIdentifier.isEmpty())
  {
      // If we have a module identifier - use to retrieve the command image name list from it.
      // Otherwise we will use the global command image list
      try
      {
          xCommandDesc->getByName(m_aModuleIdentifier) >>= xCommandDesc;
          if (xCommandDesc.is())
              xCommandDesc->getByName(aCommandImageList) >>= aCommandImageSeq;
      }
      catch (const NoSuchElementException&)
      {
          // Module unknown we will work with an empty command image list!
          return;
      }
  }

  if (xCommandDesc.is())
  {
      try
      {
          xCommandDesc->getByName(aCommandImageList) >>= aCommandImageSeq;
      }
      catch (const NoSuchElementException&)
      {
      }
      catch (const WrappedTargetException&)
      {
      }
  }

  m_aResolver.registerCommands(aCommandImageSeq);

  m_bInitialized = true;
165}


168Image CmdImageList::getImageFromCommandURL(vcl::ImageType nImageType, const OUString& rCommandURL)
169{
  initialize();
  return m_aResolver.getImageFromCommandURL(nImageType, rCommandURL);
172}

174bool CmdImageList::hasImage(vcl::ImageType /*nImageType*/, const OUString& rCommandURL)
175{
  initialize();
  return m_aResolver.hasImage(rCommandURL);
178}

180std::vector<OUString>& CmdImageList::getImageCommandNames()
181{
  return m_aResolver.getCommandNames();
183}

185GlobalImageList::GlobalImageList( const uno::Reference< uno::XComponentContext >& rxContext ) :
  CmdImageList( rxContext, OUString() )
187{
188}

190GlobalImageList::~GlobalImageList()
191{
  osl::MutexGuard guard( getGlobalImageListMutex() );
  // remove global pointer as we destroy the object now
  pGlobalImageList = nullptr;
195}

197Image GlobalImageList::getImageFromCommandURL( vcl::ImageType nImageType, const OUString& rCommandURL )
198{
  osl::MutexGuard guard( getGlobalImageListMutex() );
  return CmdImageList::getImageFromCommandURL( nImageType, rCommandURL );
201}

203bool GlobalImageList::hasImage( vcl::ImageType nImageType, const OUString& rCommandURL )
204{
  osl::MutexGuard guard( getGlobalImageListMutex() );
  return CmdImageList::hasImage( nImageType, rCommandURL );
207}

:std::vector< OUString >& GlobalImageList::getImageCommandNames()
210{
  osl::MutexGuard guard( getGlobalImageListMutex() );
  return CmdImageList::getImageCommandNames();
213}

215static bool implts_checkAndScaleGraphic( uno::Reference< XGraphic >& rOutGraphic, const uno::Reference< XGraphic >& rInGraphic, vcl::ImageType nImageType )
216{
  if ( !rInGraphic.is() )
  {
      rOutGraphic = uno::Reference<graphic::XGraphic>();
      return false;
  }

  static const o3tl::enumarray<vcl::ImageType, Size> BITMAP_SIZE =
  {
      Size(16, 16), Size(24, 24), Size(32, 32)
  };

  // Check size and scale it
  Graphic aImage(rInGraphic);
  if (BITMAP_SIZE[nImageType] != aImage.GetSizePixel())
  {
      BitmapEx aBitmap = aImage.GetBitmapEx();
      aBitmap.Scale(BITMAP_SIZE[nImageType]);
      aImage = Graphic(aBitmap);
      rOutGraphic = aImage.GetXGraphic();
  }
  else
      rOutGraphic = rInGraphic;

  return true;
241}

243static vcl::ImageType implts_convertImageTypeToIndex( sal_Int16 nImageType )
244{
  if (nImageType & css::ui::ImageType::SIZE_LARGE)
      return vcl::ImageType::Size26;
  else if (nImageType & css::ui::ImageType::SIZE_32)
      return vcl::ImageType::Size32;
  else
      return vcl::ImageType::Size16;
251}

253ImageList* ImageManagerImpl::implts_getUserImageList( vcl::ImageType nImageType )
254{
  SolarMutexGuard g;
  if ( !m_pUserImageList[nImageType] )
10
←
Taking false branch→
      implts_loadUserImages( nImageType, m_xUserImageStorage, m_xUserBitmapsStorage );

  return m_pUserImageList[nImageType].get();
11
←
Value assigned to field 'm_bUseGlobal', which participates in a condition later→
260}

262void ImageManagerImpl::implts_initialize()
263{
  // Initialize the top-level structures with the storage data
  if ( !m_xUserConfigStorage.is() )
      return;

  long nModes = m_bReadOnly ? ElementModes::READ : ElementModes::READWRITE;

  try
  {
      m_xUserImageStorage = m_xUserConfigStorage->openStorageElement( IMAGE_FOLDER,
                                                                      nModes );
      if ( m_xUserImageStorage.is() )
      {
          m_xUserBitmapsStorage = m_xUserImageStorage->openStorageElement( BITMAPS_FOLDER,
                                                                           nModes );
      }
  }
  catch ( const css::container::NoSuchElementException& )
  {
  }
  catch ( const css::embed::InvalidStorageException& )
  {
  }
  catch ( const css::lang::IllegalArgumentException& )
  {
  }
  catch ( const css::io::IOException& )
  {
  }
  catch ( const css::embed::StorageWrappedTargetException& )
  {
  }
295}

297void ImageManagerImpl::implts_loadUserImages(
  vcl::ImageType nImageType,
  const uno::Reference< XStorage >& xUserImageStorage,
  const uno::Reference< XStorage >& xUserBitmapsStorage )
301{
  SolarMutexGuard g;

  if ( xUserImageStorage.is() && xUserBitmapsStorage.is() )
  {
      try
      {
          uno::Reference< XStream > xStream = xUserImageStorage->openStreamElement( OUString::createFromAscii( IMAGELIST_XML_FILE[nImageType] ),
                                                                                    ElementModes::READ );
          uno::Reference< XInputStream > xInputStream = xStream->getInputStream();

          ImageItemDescriptorList aUserImageListInfo;
          ImagesConfiguration::LoadImages( m_xContext,
                                           xInputStream,
                                           aUserImageListInfo );
          if ( !aUserImageListInfo.empty() )
          {
              sal_Int32 nCount = aUserImageListInfo.size();
              std::vector< OUString > aUserImagesVector;
              aUserImagesVector.reserve(nCount);
              for ( sal_Int32 i=0; i < nCount; i++ )
              {
                  const ImageItemDescriptor& rItem = aUserImageListInfo[i];
                  aUserImagesVector.push_back( rItem.aCommandURL );
              }

              uno::Reference< XStream > xBitmapStream = xUserBitmapsStorage->openStreamElement(
                                                      OUString::createFromAscii( BITMAP_FILE_NAMES[nImageType] ),
                                                      ElementModes::READ );

              if ( xBitmapStream.is() )
              {
                  BitmapEx aUserBitmap;
                  {
                      std::unique_ptr<SvStream> pSvStream(utl::UcbStreamHelper::CreateStream( xBitmapStream ));
                      vcl::PNGReader aPngReader( *pSvStream );
                      aUserBitmap = aPngReader.Read();
                  }

                  // Delete old image list and create a new one from the read bitmap
                  m_pUserImageList[nImageType].reset(new ImageList());
                  m_pUserImageList[nImageType]->InsertFromHorizontalStrip
                      ( aUserBitmap, aUserImagesVector );
                  return;
              }
          }
      }
      catch ( const css::container::NoSuchElementException& )
      {
      }
      catch ( const css::embed::InvalidStorageException& )
      {
      }
      catch ( const css::lang::IllegalArgumentException& )
      {
      }
      catch ( const css::io::IOException& )
      {
      }
      catch ( const css::embed::StorageWrappedTargetException& )
      {
      }
  }

  // Destroy old image list - create a new empty one
  m_pUserImageList[nImageType].reset(new ImageList);
367}

369bool ImageManagerImpl::implts_storeUserImages(
  vcl::ImageType nImageType,
  const uno::Reference< XStorage >& xUserImageStorage,
  const uno::Reference< XStorage >& xUserBitmapsStorage )
373{
  SolarMutexGuard g;

  if ( m_bModified )
  {
      ImageList* pImageList = implts_getUserImageList( nImageType );
      if ( pImageList->GetImageCount() > 0 )
      {
          ImageItemDescriptorList aUserImageListInfo;

          for ( sal_uInt16 i=0; i < pImageList->GetImageCount(); i++ )
          {
              ImageItemDescriptor aItem;
              aItem.aCommandURL = pImageList->GetImageName( i );
              aUserImageListInfo.push_back( aItem );
          }

          uno::Reference< XTransactedObject > xTransaction;
          uno::Reference< XOutputStream >     xOutputStream;
          uno::Reference< XStream > xStream = xUserImageStorage->openStreamElement( OUString::createFromAscii( IMAGELIST_XML_FILE[nImageType] ),
                                                                                    ElementModes::WRITE|ElementModes::TRUNCATE );
          if ( xStream.is() )
          {
              uno::Reference< XStream > xBitmapStream =
                  xUserBitmapsStorage->openStreamElement( OUString::createFromAscii( BITMAP_FILE_NAMES[nImageType] ),
                                                          ElementModes::WRITE|ElementModes::TRUNCATE );
              if ( xBitmapStream.is() )
              {
                  {
                      std::unique_ptr<SvStream> pSvStream(utl::UcbStreamHelper::CreateStream( xBitmapStream ));
                      vcl::PNGWriter aPngWriter( pImageList->GetAsHorizontalStrip() );
                      aPngWriter.Write( *pSvStream );
                  }

                  // Commit user bitmaps storage
                  xTransaction.set( xUserBitmapsStorage, UNO_QUERY );
                  if ( xTransaction.is() )
                      xTransaction->commit();
              }

              xOutputStream = xStream->getOutputStream();
              if ( xOutputStream.is() )
                  ImagesConfiguration::StoreImages( m_xContext, xOutputStream, aUserImageListInfo );

              // Commit user image storage
              xTransaction.set( xUserImageStorage, UNO_QUERY );
              if ( xTransaction.is() )
                  xTransaction->commit();
          }

          return true;
      }
      else
      {
          // Remove the streams from the storage, if we have no data. We have to catch
          // the NoSuchElementException as it can be possible that there is no stream at all!
          try
          {
              xUserImageStorage->removeElement( OUString::createFromAscii( IMAGELIST_XML_FILE[nImageType] ));
          }
          catch ( const css::container::NoSuchElementException& )
          {
          }

          try
          {
              xUserBitmapsStorage->removeElement( OUString::createFromAscii( BITMAP_FILE_NAMES[nImageType] ));
          }
          catch ( const css::container::NoSuchElementException& )
          {
          }

          uno::Reference< XTransactedObject > xTransaction;

          // Commit user image storage
          xTransaction.set( xUserImageStorage, UNO_QUERY );
          if ( xTransaction.is() )
              xTransaction->commit();

          // Commit user bitmaps storage
          xTransaction.set( xUserBitmapsStorage, UNO_QUERY );
          if ( xTransaction.is() )
              xTransaction->commit();

          return true;
      }
  }

  return false;
462}

464const rtl::Reference< GlobalImageList >& ImageManagerImpl::implts_getGlobalImageList()
465{
  SolarMutexGuard g;

  if ( !m_pGlobalImageList.is() )
      m_pGlobalImageList = getGlobalImageList( m_xContext );
  return m_pGlobalImageList;
471}

473CmdImageList* ImageManagerImpl::implts_getDefaultImageList()
474{
  SolarMutexGuard g;

  if ( !m_pDefaultImageList )
      m_pDefaultImageList.reset(new CmdImageList( m_xContext, m_aModuleIdentifier ));

  return m_pDefaultImageList.get();
481}

483ImageManagerImpl::ImageManagerImpl( const uno::Reference< uno::XComponentContext >& rxContext,::cppu::OWeakObject* pOwner,bool _bUseGlobal ) :
  m_xContext( rxContext )
  , m_pOwner(pOwner)
  , m_aResourceString( "private:resource/images/moduleimages" )
  , m_aListenerContainer( m_mutex )
  , m_bUseGlobal(_bUseGlobal)
  , m_bReadOnly( true )
  , m_bInitialized( false )
  , m_bModified( false )
  , m_bDisposed( false )
493{
  for ( vcl::ImageType n : o3tl::enumrange<vcl::ImageType>() )
  {
      m_pUserImageList[n] = nullptr;
      m_bUserImageListModified[n] = false;
  }
499}

501ImageManagerImpl::~ImageManagerImpl()
502{
  clear();
504}

506void ImageManagerImpl::dispose()
507{
  uno::Reference< uno::XInterface > xOwner(m_pOwner);
  css::lang::EventObject aEvent( xOwner );
  m_aListenerContainer.disposeAndClear( aEvent );

  {
      SolarMutexGuard g;
      m_xUserConfigStorage.clear();
      m_xUserImageStorage.clear();
      m_xUserRootCommit.clear();
      m_bModified = false;
      m_bDisposed = true;

      // delete user and default image list on dispose
      for (auto& n : m_pUserImageList)
      {
          n.reset();
      }
      m_pDefaultImageList.reset();
  }

528}
529void ImageManagerImpl::addEventListener( const uno::Reference< XEventListener >& xListener )
530{
  {
      SolarMutexGuard g;

      /* SAFE AREA ----------------------------------------------------------------------------------------------- */
      if ( m_bDisposed )
          throw DisposedException();
  }

  m_aListenerContainer.addInterface( cppu::UnoType<XEventListener>::get(), xListener );
540}

542void ImageManagerImpl::removeEventListener( const uno::Reference< XEventListener >& xListener )
543{
  /* SAFE AREA ----------------------------------------------------------------------------------------------- */
  m_aListenerContainer.removeInterface( cppu::UnoType<XEventListener>::get(), xListener );
546}

548// XInitialization
549void ImageManagerImpl::initialize( const Sequence< Any >& aArguments )
550{
  SolarMutexGuard g;

  if ( m_bInitialized )
      return;

  for ( const Any& rArg : aArguments )
  {
      PropertyValue aPropValue;
      if ( rArg >>= aPropValue )
      {
          if ( aPropValue.Name == "UserConfigStorage" )
          {
              aPropValue.Value >>= m_xUserConfigStorage;
          }
          else if ( aPropValue.Name == "ModuleIdentifier" )
          {
              aPropValue.Value >>= m_aModuleIdentifier;
          }
          else if ( aPropValue.Name == "UserRootCommit" )
          {
              aPropValue.Value >>= m_xUserRootCommit;
          }
      }
  }

  if ( m_xUserConfigStorage.is() )
  {
      uno::Reference< XPropertySet > xPropSet( m_xUserConfigStorage, UNO_QUERY );
      if ( xPropSet.is() )
      {
          long nOpenMode = 0;
          if ( xPropSet->getPropertyValue("OpenMode") >>= nOpenMode )
              m_bReadOnly = !( nOpenMode & ElementModes::WRITE );
      }
  }

  implts_initialize();

  m_bInitialized = true;
590}

592// XImageManagerImpl
593void ImageManagerImpl::reset()
594{
  SolarMutexGuard g;

  /* SAFE AREA ----------------------------------------------------------------------------------------------- */
  if ( m_bDisposed )
      throw DisposedException();

  std::vector< OUString > aUserImageNames;

  for ( vcl::ImageType i : o3tl::enumrange<vcl::ImageType>() )
  {
      aUserImageNames.clear();
      ImageList* pImageList = implts_getUserImageList(i);
      pImageList->GetImageNames( aUserImageNames );

      Sequence< OUString > aRemoveList( comphelper::containerToSequence(aUserImageNames) );

      // Remove images
      removeImages( sal_Int16( i ), aRemoveList );
      m_bUserImageListModified[i] = true;
  }

  m_bModified = true;
617}

619Sequence< OUString > ImageManagerImpl::getAllImageNames( ::sal_Int16 nImageType )
620{
  SolarMutexGuard g;

  /* SAFE AREA ----------------------------------------------------------------------------------------------- */
  if ( m_bDisposed )
      throw DisposedException();

  ImageNameMap aImageCmdNameMap;

  vcl::ImageType nIndex = implts_convertImageTypeToIndex( nImageType );

  sal_uInt32 i( 0 );
  if ( m_bUseGlobal )
  {
      rtl::Reference< GlobalImageList > rGlobalImageList = implts_getGlobalImageList();

      const std::vector< OUString >& rGlobalImageNameVector = rGlobalImageList->getImageCommandNames();
      const sal_uInt32 nGlobalCount = rGlobalImageNameVector.size();
      for ( i = 0; i < nGlobalCount; i++ )
          aImageCmdNameMap.emplace( rGlobalImageNameVector[i], true );

      const std::vector< OUString >& rModuleImageNameVector = implts_getDefaultImageList()->getImageCommandNames();
      const sal_uInt32 nModuleCount = rModuleImageNameVector.size();
      for ( i = 0; i < nModuleCount; i++ )
          aImageCmdNameMap.emplace( rModuleImageNameVector[i], true );
  }

  ImageList* pImageList = implts_getUserImageList(nIndex);
  std::vector< OUString > rUserImageNames;
  pImageList->GetImageNames( rUserImageNames );
  const sal_uInt32 nUserCount = rUserImageNames.size();
  for ( i = 0; i < nUserCount; i++ )
      aImageCmdNameMap.emplace( rUserImageNames[i], true );

  return comphelper::mapKeysToSequence( aImageCmdNameMap );
655}

657bool ImageManagerImpl::hasImage( ::sal_Int16 nImageType, const OUString& aCommandURL )
658{
  SolarMutexGuard g;

  /* SAFE AREA ----------------------------------------------------------------------------------------------- */
  if ( m_bDisposed )
      throw DisposedException();

  if (( nImageType < 0 ) || ( nImageType > MAX_IMAGETYPE_VALUE ))
      throw IllegalArgumentException();

  vcl::ImageType nIndex = implts_convertImageTypeToIndex( nImageType );
  if ( m_bUseGlobal && implts_getGlobalImageList()->hasImage( nIndex, aCommandURL ))
      return true;
  else
  {
      if ( m_bUseGlobal && implts_getDefaultImageList()->hasImage( nIndex, aCommandURL ))
          return true;
      else
      {
          // User layer
          ImageList* pImageList = implts_getUserImageList(nIndex);
          if ( pImageList )
              return ( pImageList->GetImagePos( aCommandURL ) != IMAGELIST_IMAGE_NOTFOUND(sal_uInt16(0xFFFF)) );
      }
  }

  return false;
685}

687namespace
688{
  css::uno::Reference< css::graphic::XGraphic > GetXGraphic(const Image &rImage)
  {
      return Graphic(rImage).GetXGraphic();
  }
693}

695Sequence< uno::Reference< XGraphic > > ImageManagerImpl::getImages(
  ::sal_Int16 nImageType,
  const Sequence< OUString >& aCommandURLSequence )
698{
  SolarMutexGuard g;

  /* SAFE AREA ----------------------------------------------------------------------------------------------- */
  if ( m_bDisposed )
1
Assuming field 'm_bDisposed' is false→
2
←
Taking false branch→
      throw DisposedException();

  if (( nImageType < 0 ) || ( nImageType > MAX_IMAGETYPE_VALUE ))
3
←
Assuming 'nImageType' is >= 0→
4
←
Assuming 'nImageType' is <= 'MAX_IMAGETYPE_VALUE'→
5
←
Taking false branch→
      throw IllegalArgumentException();

  Sequence< uno::Reference< XGraphic > > aGraphSeq( aCommandURLSequence.getLength() );

  vcl::ImageType                    nIndex            = implts_convertImageTypeToIndex( nImageType );
  rtl::Reference< GlobalImageList > rGlobalImageList;
  CmdImageList*                     pDefaultImageList = nullptr;
6
←
'pDefaultImageList' initialized to a null pointer value→
  if ( m_bUseGlobal )
7
←
Assuming field 'm_bUseGlobal' is false→
8
←
Taking false branch→
  {
      rGlobalImageList  = implts_getGlobalImageList();
      pDefaultImageList = implts_getDefaultImageList();
  }
  ImageList*                        pUserImageList    = implts_getUserImageList(nIndex);
9
←
Calling 'ImageManagerImpl::implts_getUserImageList'→
12
←
Returning from 'ImageManagerImpl::implts_getUserImageList'→

  // We have to search our image list in the following order:
  // 1. user image list (read/write)
  // 2. module image list (read)
  // 3. global image list (read)
  sal_Int32 n = 0;
  for ( const OUString& rURL : aCommandURLSequence )
13
←
Assuming '__begin1' is not equal to '__end1'→
  {
      Image aImage = pUserImageList->GetImage( rURL );
      if ( !aImage && m_bUseGlobal )
14
←
Calling 'Image::operator!'→
21
←
Returning from 'Image::operator!'→
22
←
Assuming field 'm_bUseGlobal' is true→
23
←
Taking true branch→
      {
          aImage = pDefaultImageList->getImageFromCommandURL( nIndex, rURL );
24
←
Called C++ object pointer is null
          if ( !aImage )
              aImage = rGlobalImageList->getImageFromCommandURL( nIndex, rURL );
      }

      aGraphSeq[n++] = GetXGraphic(aImage);
  }

  return aGraphSeq;
739}

741void ImageManagerImpl::replaceImages(
  ::sal_Int16 nImageType,
  const Sequence< OUString >& aCommandURLSequence,
  const Sequence< uno::Reference< XGraphic > >& aGraphicsSequence )
745{
  GraphicNameAccess* pInsertedImages( nullptr );
  GraphicNameAccess* pReplacedImages( nullptr );

  {
      SolarMutexGuard g;

      /* SAFE AREA ----------------------------------------------------------------------------------------------- */
      if ( m_bDisposed )
          throw DisposedException();

      if (( aCommandURLSequence.getLength() != aGraphicsSequence.getLength() ) ||
          (( nImageType < 0 ) || ( nImageType > MAX_IMAGETYPE_VALUE )))
          throw IllegalArgumentException();

      if ( m_bReadOnly )
          throw IllegalAccessException();

      vcl::ImageType nIndex = implts_convertImageTypeToIndex( nImageType );
      ImageList* pImageList = implts_getUserImageList(nIndex);

      uno::Reference< XGraphic > xGraphic;
      for ( sal_Int32 i = 0; i < aCommandURLSequence.getLength(); i++ )
      {
          // Check size and scale. If we don't have any graphics ignore it
          if ( !implts_checkAndScaleGraphic( xGraphic, aGraphicsSequence[i], nIndex ))
              continue;

          sal_uInt16 nPos = pImageList->GetImagePos( aCommandURLSequence[i] );
          if ( nPos == IMAGELIST_IMAGE_NOTFOUND(sal_uInt16(0xFFFF)) )
          {
              pImageList->AddImage(aCommandURLSequence[i], Image(xGraphic));
              if ( !pInsertedImages )
                  pInsertedImages = new GraphicNameAccess();
              pInsertedImages->addElement( aCommandURLSequence[i], xGraphic );
          }
          else
          {
              pImageList->ReplaceImage(aCommandURLSequence[i], Image(xGraphic));
              if ( !pReplacedImages )
                  pReplacedImages = new GraphicNameAccess();
              pReplacedImages->addElement( aCommandURLSequence[i], xGraphic );
          }
      }

      if (( pInsertedImages != nullptr ) || (  pReplacedImages != nullptr ))
      {
          m_bModified = true;
          m_bUserImageListModified[nIndex] = true;
      }
  }

  uno::Reference< uno::XInterface > xOwner(m_pOwner);
  // Notify listeners
  if ( pInsertedImages != nullptr )
  {
      ConfigurationEvent aInsertEvent;
      aInsertEvent.aInfo           <<= nImageType;
      aInsertEvent.Accessor        <<= xOwner;
      aInsertEvent.Source          = xOwner;
      aInsertEvent.ResourceURL     = m_aResourceString;
      aInsertEvent.Element         <<= uno::Reference< XNameAccess >(
                                         static_cast< OWeakObject *>( pInsertedImages ), UNO_QUERY );
      implts_notifyContainerListener( aInsertEvent, NotifyOp_Insert );
  }
  if ( pReplacedImages != nullptr )
  {
      ConfigurationEvent aReplaceEvent;
      aReplaceEvent.aInfo           <<= nImageType;
      aReplaceEvent.Accessor        <<= xOwner;
      aReplaceEvent.Source          = xOwner;
      aReplaceEvent.ResourceURL     = m_aResourceString;
      aReplaceEvent.ReplacedElement = Any();
      aReplaceEvent.Element         <<= uno::Reference< XNameAccess >(
                                          static_cast< OWeakObject *>( pReplacedImages ), UNO_QUERY );
      implts_notifyContainerListener( aReplaceEvent, NotifyOp_Replace );
  }
822}

824void ImageManagerImpl::removeImages( ::sal_Int16 nImageType, const Sequence< OUString >& aCommandURLSequence )
825{
  GraphicNameAccess* pRemovedImages( nullptr );
  GraphicNameAccess* pReplacedImages( nullptr );

  {
      SolarMutexGuard g;

      /* SAFE AREA ----------------------------------------------------------------------------------------------- */
      if ( m_bDisposed )
          throw DisposedException();

      if (( nImageType < 0 ) || ( nImageType > MAX_IMAGETYPE_VALUE ))
          throw IllegalArgumentException();

      if ( m_bReadOnly )
          throw IllegalAccessException();

      vcl::ImageType nIndex = implts_convertImageTypeToIndex( nImageType );
      rtl::Reference< GlobalImageList > rGlobalImageList;
      CmdImageList*                     pDefaultImageList = nullptr;
      if ( m_bUseGlobal )
      {
          rGlobalImageList  = implts_getGlobalImageList();
          pDefaultImageList = implts_getDefaultImageList();
      }
      ImageList*                        pImageList        = implts_getUserImageList(nIndex);
      uno::Reference<XGraphic> xEmptyGraphic;

      for ( const OUString& rURL : aCommandURLSequence )
      {
          sal_uInt16 nPos = pImageList->GetImagePos( rURL );
          if ( nPos != IMAGELIST_IMAGE_NOTFOUND(sal_uInt16(0xFFFF)) )
          {
              sal_uInt16 nId   = pImageList->GetImageId( nPos );
              pImageList->RemoveImage( nId );

              if ( m_bUseGlobal )
              {
                  // Check, if we have an image in our module/global image list. If we find one =>
                  // this is a replace instead of a remove operation!
                  Image aNewImage = pDefaultImageList->getImageFromCommandURL( nIndex, rURL );
                  if ( !aNewImage )
                      aNewImage = rGlobalImageList->getImageFromCommandURL( nIndex, rURL );
                  if ( !aNewImage )
                  {
                      if ( !pRemovedImages )
                          pRemovedImages = new GraphicNameAccess();
                      pRemovedImages->addElement( rURL, xEmptyGraphic );
                  }
                  else
                  {
                      if ( !pReplacedImages )
                          pReplacedImages = new GraphicNameAccess();
                      pReplacedImages->addElement(rURL, GetXGraphic(aNewImage));
                  }
              } // if ( m_bUseGlobal )
              else
              {
                  if ( !pRemovedImages )
                      pRemovedImages = new GraphicNameAccess();
                  pRemovedImages->addElement( rURL, xEmptyGraphic );
              }
          }
      }

      if (( pReplacedImages != nullptr ) || ( pRemovedImages != nullptr ))
      {
          m_bModified = true;
          m_bUserImageListModified[nIndex] = true;
      }
  }

  // Notify listeners
  uno::Reference< uno::XInterface > xOwner(m_pOwner);
  if ( pRemovedImages != nullptr )
  {
      ConfigurationEvent aRemoveEvent;
      aRemoveEvent.aInfo           <<= nImageType;
      aRemoveEvent.Accessor        <<= xOwner;
      aRemoveEvent.Source          = xOwner;
      aRemoveEvent.ResourceURL     = m_aResourceString;
      aRemoveEvent.Element         <<= uno::Reference< XNameAccess >(
                                          static_cast< OWeakObject *>( pRemovedImages ), UNO_QUERY );
      implts_notifyContainerListener( aRemoveEvent, NotifyOp_Remove );
  }
  if ( pReplacedImages != nullptr )
  {
      ConfigurationEvent aReplaceEvent;
      aReplaceEvent.aInfo           <<= nImageType;
      aReplaceEvent.Accessor        <<= xOwner;
      aReplaceEvent.Source          = xOwner;
      aReplaceEvent.ResourceURL     = m_aResourceString;
      aReplaceEvent.ReplacedElement = Any();
      aReplaceEvent.Element         <<= uno::Reference< XNameAccess >(
                                          static_cast< OWeakObject *>( pReplacedImages ), UNO_QUERY );
      implts_notifyContainerListener( aReplaceEvent, NotifyOp_Replace );
  }
922}

924void ImageManagerImpl::insertImages( ::sal_Int16 nImageType, const Sequence< OUString >& aCommandURLSequence, const Sequence< uno::Reference< XGraphic > >& aGraphicSequence )
925{
  replaceImages(nImageType,aCommandURLSequence,aGraphicSequence);
927}

929// XUIConfigurationPersistence
930void ImageManagerImpl::reload()
931{
  SolarMutexClearableGuard aGuard;

  if ( m_bDisposed )
      throw DisposedException();

  CommandMap                   aOldUserCmdImageSet;
  std::vector< OUString > aNewUserCmdImageSet;

  if ( !m_bModified )
      return;

  for ( vcl::ImageType i : o3tl::enumrange<vcl::ImageType>() )
  {
      if ( !m_bDisposed && m_bUserImageListModified[i] )
      {
          std::vector< OUString > aOldUserCmdImageVector;
          ImageList* pImageList = implts_getUserImageList(i);
          pImageList->GetImageNames( aOldUserCmdImageVector );

          // Fill hash map to speed up search afterwards
          sal_uInt32 j( 0 );
          const sal_uInt32 nOldCount = aOldUserCmdImageVector.size();
          for ( j = 0; j < nOldCount; j++ )
              aOldUserCmdImageSet.emplace( aOldUserCmdImageVector[j], false );

          // Attention: This can make the old image list pointer invalid!
          implts_loadUserImages( i, m_xUserImageStorage, m_xUserBitmapsStorage );
          pImageList = implts_getUserImageList(i);
          pImageList->GetImageNames( aNewUserCmdImageSet );

          GraphicNameAccess* pInsertedImages( nullptr );
          GraphicNameAccess* pReplacedImages( nullptr );
          GraphicNameAccess* pRemovedImages( nullptr );

          for (auto const& newUserCmdImage : aNewUserCmdImageSet)
          {
              CommandMap::iterator pIter = aOldUserCmdImageSet.find(newUserCmdImage);
              if ( pIter != aOldUserCmdImageSet.end() )
              {
                  pIter->second = true; // mark entry as replaced
                  if ( !pReplacedImages )
                      pReplacedImages = new GraphicNameAccess();
                  pReplacedImages->addElement( newUserCmdImage,
                                               GetXGraphic(pImageList->GetImage(newUserCmdImage)) );
              }
              else
              {
                  if ( !pInsertedImages )
                      pInsertedImages = new GraphicNameAccess();
                  pInsertedImages->addElement( newUserCmdImage,
                                               GetXGraphic(pImageList->GetImage(newUserCmdImage)) );
              }
          }

          // Search map for unmarked entries => they have been removed from the user list
          // through this reload operation.
          // We have to search the module and global image list!
          rtl::Reference< GlobalImageList > rGlobalImageList;
          CmdImageList*                     pDefaultImageList = nullptr;
          if ( m_bUseGlobal )
          {
              rGlobalImageList  = implts_getGlobalImageList();
              pDefaultImageList = implts_getDefaultImageList();
          }
          uno::Reference<XGraphic> xEmptyGraphic;
          for (auto const& oldUserCmdImage : aOldUserCmdImageSet)
          {
              if ( !oldUserCmdImage.second )
              {
                  if ( m_bUseGlobal )
                  {
                      Image aImage = pDefaultImageList->getImageFromCommandURL( i, oldUserCmdImage.first );
                      if ( !aImage )
                          aImage = rGlobalImageList->getImageFromCommandURL( i, oldUserCmdImage.first );

                      if ( !aImage )
                      {
                          // No image in the module/global image list => remove user image
                          if ( !pRemovedImages )
                              pRemovedImages = new GraphicNameAccess();
                          pRemovedImages->addElement( oldUserCmdImage.first, xEmptyGraphic );
                      }
                      else
                      {
                          // Image has been found in the module/global image list => replace user image
                          if ( !pReplacedImages )
                              pReplacedImages = new GraphicNameAccess();
                          pReplacedImages->addElement(oldUserCmdImage.first, GetXGraphic(aImage));
                      }
                  } // if ( m_bUseGlobal )
                  else
                  {
                      // No image in the user image list => remove user image
                      if ( !pRemovedImages )
                          pRemovedImages = new GraphicNameAccess();
                      pRemovedImages->addElement( oldUserCmdImage.first, xEmptyGraphic );
                  }
              }
          }

          aGuard.clear();

          // Now notify our listeners. Unlock mutex to prevent deadlocks
          uno::Reference< uno::XInterface > xOwner(m_pOwner);
          if ( pInsertedImages != nullptr )
          {
              ConfigurationEvent aInsertEvent;
              aInsertEvent.aInfo           <<=static_cast<sal_uInt16>(i);
              aInsertEvent.Accessor        <<= xOwner;
              aInsertEvent.Source          = xOwner;
              aInsertEvent.ResourceURL     = m_aResourceString;
              aInsertEvent.Element         <<= uno::Reference< XNameAccess >(
                                                 static_cast< OWeakObject *>( pInsertedImages ), UNO_QUERY );
              implts_notifyContainerListener( aInsertEvent, NotifyOp_Insert );
          }
          if ( pReplacedImages != nullptr )
          {
              ConfigurationEvent aReplaceEvent;
              aReplaceEvent.aInfo           <<= static_cast<sal_uInt16>(i);
              aReplaceEvent.Accessor        <<= xOwner;
              aReplaceEvent.Source          = xOwner;
              aReplaceEvent.ResourceURL     = m_aResourceString;
              aReplaceEvent.ReplacedElement = Any();
              aReplaceEvent.Element         <<= uno::Reference< XNameAccess >(
                                              static_cast< OWeakObject *>( pReplacedImages ), UNO_QUERY );
              implts_notifyContainerListener( aReplaceEvent, NotifyOp_Replace );
          }
          if ( pRemovedImages != nullptr )
          {
              ConfigurationEvent aRemoveEvent;
              aRemoveEvent.aInfo           <<= static_cast<sal_uInt16>(i);
              aRemoveEvent.Accessor        <<= xOwner;
              aRemoveEvent.Source          = xOwner;
              aRemoveEvent.ResourceURL     = m_aResourceString;
              aRemoveEvent.Element         <<= uno::Reference< XNameAccess >(
                                                  static_cast< OWeakObject *>( pRemovedImages ), UNO_QUERY );
              implts_notifyContainerListener( aRemoveEvent, NotifyOp_Remove );
          }

          aGuard.clear();
      }
  }
1074}

1076void ImageManagerImpl::store()
1077{
  SolarMutexGuard g;

  if ( m_bDisposed )
      throw DisposedException();

  if ( !m_bModified )
      return;

  bool bWritten( false );
  for ( vcl::ImageType i : o3tl::enumrange<vcl::ImageType>() )
  {
      bool bSuccess = implts_storeUserImages(i, m_xUserImageStorage, m_xUserBitmapsStorage );
      if ( bSuccess )
          bWritten = true;
      m_bUserImageListModified[i] = false;
  }

  if ( bWritten &&
       m_xUserConfigStorage.is() )
  {
      uno::Reference< XTransactedObject > xUserConfigStorageCommit( m_xUserConfigStorage, UNO_QUERY );
      if ( xUserConfigStorageCommit.is() )
          xUserConfigStorageCommit->commit();
      if ( m_xUserRootCommit.is() )
          m_xUserRootCommit->commit();
  }

  m_bModified = false;
1106}

1108void ImageManagerImpl::storeToStorage( const uno::Reference< XStorage >& Storage )
1109{
  SolarMutexGuard g;

  if ( m_bDisposed )
      throw DisposedException();

  if ( !(m_bModified && Storage.is()) )
      return;

  long nModes = ElementModes::READWRITE;

  uno::Reference< XStorage > xUserImageStorage = Storage->openStorageElement( IMAGE_FOLDER,
                                                                              nModes );
  if ( !xUserImageStorage.is() )
      return;

  uno::Reference< XStorage > xUserBitmapsStorage = xUserImageStorage->openStorageElement( BITMAPS_FOLDER,
                                                                                          nModes );
  for ( vcl::ImageType i : o3tl::enumrange<vcl::ImageType>() )
  {
      implts_getUserImageList(i);
      implts_storeUserImages( i, xUserImageStorage, xUserBitmapsStorage );
  }

  uno::Reference< XTransactedObject > xTransaction( Storage, UNO_QUERY );
  if ( xTransaction.is() )
      xTransaction->commit();
1136}

1138bool ImageManagerImpl::isModified() const
1139{
  SolarMutexGuard g;
  return m_bModified;
1142}

1144bool ImageManagerImpl::isReadOnly() const
1145{
  SolarMutexGuard g;
  return m_bReadOnly;
1148}
1149// XUIConfiguration
1150void ImageManagerImpl::addConfigurationListener( const uno::Reference< css::ui::XUIConfigurationListener >& xListener )
1151{
  {
      SolarMutexGuard g;

      /* SAFE AREA ----------------------------------------------------------------------------------------------- */
      if ( m_bDisposed )
          throw DisposedException();
  }

  m_aListenerContainer.addInterface( cppu::UnoType<XUIConfigurationListener>::get(), xListener );
1161}

1163void ImageManagerImpl::removeConfigurationListener( const uno::Reference< css::ui::XUIConfigurationListener >& xListener )
1164{
  /* SAFE AREA ----------------------------------------------------------------------------------------------- */
  m_aListenerContainer.removeInterface( cppu::UnoType<XUIConfigurationListener>::get(), xListener );
1167}

1169void ImageManagerImpl::implts_notifyContainerListener( const ConfigurationEvent& aEvent, NotifyOp eOp )
1170{
  ::cppu::OInterfaceContainerHelper* pContainer = m_aListenerContainer.getContainer(
                                      cppu::UnoType<css::ui::XUIConfigurationListener>::get());
  if ( pContainer == nullptr )
      return;

  ::cppu::OInterfaceIteratorHelper pIterator( *pContainer );
  while ( pIterator.hasMoreElements() )
  {
      try
      {
          switch ( eOp )
          {
              case NotifyOp_Replace:
                  static_cast< css::ui::XUIConfigurationListener*>(pIterator.next())->elementReplaced( aEvent );
                  break;
              case NotifyOp_Insert:
                  static_cast< css::ui::XUIConfigurationListener*>(pIterator.next())->elementInserted( aEvent );
                  break;
              case NotifyOp_Remove:
                  static_cast< css::ui::XUIConfigurationListener*>(pIterator.next())->elementRemoved( aEvent );
                  break;
          }
      }
      catch( const css::uno::RuntimeException& )
      {
          pIterator.remove();
      }
  }
1199}
1200void ImageManagerImpl::clear()
1201{
  SolarMutexGuard g;

  for (auto & n : m_pUserImageList)
  {
      n.reset();
  }
1208}
1209} // namespace framework

1211/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

←

/home/maarten/src/libreoffice/core/include/vcl/image.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_IMAGE_HXX
21#define INCLUDED_VCL_IMAGE_HXX
22 
23#include <vcl/dllapi.h>
24#include <tools/gen.hxx>
25#include <vcl/bitmapex.hxx>
26#include <vcl/outdev.hxx>
27 
28#include <memory>
29 
30class ImplImage;
31 
32namespace com::sun::star::graphic { class XGraphic; }
33namespace com::sun::star::uno { template <class interface_type> class Reference; }
34 
35#define IMAGELIST_IMAGE_NOTFOUND(sal_uInt16(0xFFFF)) (sal_uInt16(0xFFFF))
36 
37enum class StockImage { Yes };
38 
39class SAL_WARN_UNUSED__attribute__((warn_unused)) VCL_DLLPUBLIC__attribute__ ((visibility("default"))) Image
40{
41    friend class ::OutputDevice;
42public:
43    Image();
44    explicit Image(BitmapEx const & rBitmapEx);
45    explicit Image(css::uno::Reference<css::graphic::XGraphic> const & rxGraphic);
46    explicit Image(OUString const & rPNGFileUrl);
47    explicit Image(StockImage, OUString const & rPNGFilePath);
48 
49    Size GetSizePixel() const;
50    BitmapEx GetBitmapEx() const;
51 
52    bool operator!() const
53    {
54        return !mpImplData;
15
←
Calling '__shared_ptr::operator bool'→
19
←
Returning from '__shared_ptr::operator bool'→
20
←
Returning the value 1, which participates in a condition later→
55    }
56    bool operator==(const Image& rImage) const;
57    bool operator!=(const Image& rImage) const
58    {
59        return !(Image::operator==(rImage));
60    }
61 
62    OUString GetStock() const;
63 
64    void Draw(OutputDevice* pOutDev, const Point& rPos, DrawImageFlags nStyle, const Size* pSize = nullptr);
65 
66private:
67 
68    std::shared_ptr<ImplImage> mpImplData;
69 
70    SAL_DLLPRIVATE__attribute__ ((visibility("hidden"))) void ImplInit(BitmapEx const & rBmpEx);
71};
72 
73#endif // INCLUDED_VCL_IMAGE_HXX
74 
75/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

←

/usr/bin/../lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10/bits/shared_ptr_base.h

1// shared_ptr and weak_ptr implementation details -*- C++ -*-

3// Copyright (C) 2007-2020 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.

11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.

16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.

20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23// <http://www.gnu.org/licenses/>.

25// GCC Note: Based on files from version 1.32.0 of the Boost library.

27//  shared_count.hpp
28//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.

30//  shared_ptr.hpp
31//  Copyright (C) 1998, 1999 Greg Colvin and Beman Dawes.
32//  Copyright (C) 2001, 2002, 2003 Peter Dimov

34//  weak_ptr.hpp
35//  Copyright (C) 2001, 2002, 2003 Peter Dimov

37//  enable_shared_from_this.hpp
38//  Copyright (C) 2002 Peter Dimov

40// Distributed under the Boost Software License, Version 1.0. (See
41// accompanying file LICENSE_1_0.txt or copy at
42// http://www.boost.org/LICENSE_1_0.txt)

44/** @file bits/shared_ptr_base.h
*  This is an internal header file, included by other library headers.
*  Do not attempt to use it directly. @headername{memory}
*/

49#ifndef _SHARED_PTR_BASE_H1
50#define _SHARED_PTR_BASE_H1 1

52#include <typeinfo>
53#include <bits/allocated_ptr.h>
54#include <bits/refwrap.h>
55#include <bits/stl_function.h>
56#include <ext/aligned_buffer.h>
57#if __cplusplus201703L > 201703L
58# include <compare>
59#endif

61namespace std _GLIBCXX_VISIBILITY(default)__attribute__ ((__visibility__ ("default")))
62{
63_GLIBCXX_BEGIN_NAMESPACE_VERSION

65#if _GLIBCXX_USE_DEPRECATED1
66#pragma GCC diagnostic push
67#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
template<typename> class auto_ptr;
69#pragma GCC diagnostic pop
70#endif

/**
 *  @brief  Exception possibly thrown by @c shared_ptr.
 *  @ingroup exceptions
 */
class bad_weak_ptr : public std::exception
{
public:
  virtual char const* what() const noexcept;

  virtual ~bad_weak_ptr() noexcept;
};

// Substitute for bad_weak_ptr object in the case of -fno-exceptions.
inline void
__throw_bad_weak_ptr()
{ _GLIBCXX_THROW_OR_ABORT(bad_weak_ptr())(throw (bad_weak_ptr())); }

using __gnu_cxx::_Lock_policy;
using __gnu_cxx::__default_lock_policy;
using __gnu_cxx::_S_single;
using __gnu_cxx::_S_mutex;
using __gnu_cxx::_S_atomic;

// Empty helper class except when the template argument is _S_mutex.
template<_Lock_policy _Lp>
  class _Mutex_base
  {
  protected:
    // The atomic policy uses fully-fenced builtins, single doesn't care.
    enum { _S_need_barriers = 0 };
  };

template<>
  class _Mutex_base<_S_mutex>
  : public __gnu_cxx::__mutex
  {
  protected:
    // This policy is used when atomic builtins are not available.
    // The replacement atomic operations might not have the necessary
    // memory barriers.
    enum { _S_need_barriers = 1 };
  };

template<_Lock_policy _Lp = __default_lock_policy>
  class _Sp_counted_base
  : public _Mutex_base<_Lp>
  {
  public:
    _Sp_counted_base() noexcept
    : _M_use_count(1), _M_weak_count(1) { }

    virtual
    ~_Sp_counted_base() noexcept
    { }

    // Called when _M_use_count drops to zero, to release the resources
    // managed by *this.
    virtual void
    _M_dispose() noexcept = 0;

    // Called when _M_weak_count drops to zero.
    virtual void
    _M_destroy() noexcept
    { delete this; }

    virtual void*
    _M_get_deleter(const std::type_info&) noexcept = 0;

    void
    _M_add_ref_copy()
    { __gnu_cxx::__atomic_add_dispatch(&_M_use_count, 1); }

    void
    _M_add_ref_lock();

    bool
    _M_add_ref_lock_nothrow();

    void
    _M_release() noexcept
    {
      // Be race-detector-friendly.  For more info see bits/c++config.
      _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_use_count);
if (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, -1) == 1)
 {
          _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_use_count);
   _M_dispose();
   // There must be a memory barrier between dispose() and destroy()
   // to ensure that the effects of dispose() are observed in the
   // thread that runs destroy().
   // See http://gcc.gnu.org/ml/libstdc++/2005-11/msg00136.html
   if (_Mutex_base<_Lp>::_S_need_barriers)
     {
__atomic_thread_fence (__ATOMIC_ACQ_REL4);
     }

          // Be race-detector-friendly.  For more info see bits/c++config.
          _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_weak_count);
   if (__gnu_cxx::__exchange_and_add_dispatch(&_M_weak_count,
				       -1) == 1)
            {
              _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_weak_count);
       _M_destroy();
            }
 }
    }

    void
    _M_weak_add_ref() noexcept
    { __gnu_cxx::__atomic_add_dispatch(&_M_weak_count, 1); }

    void
    _M_weak_release() noexcept
    {
      // Be race-detector-friendly. For more info see bits/c++config.
      _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_weak_count);
if (__gnu_cxx::__exchange_and_add_dispatch(&_M_weak_count, -1) == 1)
 {
          _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_weak_count);
   if (_Mutex_base<_Lp>::_S_need_barriers)
     {
       // See _M_release(),
       // destroy() must observe results of dispose()
__atomic_thread_fence (__ATOMIC_ACQ_REL4);
     }
   _M_destroy();
 }
    }

    long
    _M_get_use_count() const noexcept
    {
      // No memory barrier is used here so there is no synchronization
      // with other threads.
      return __atomic_load_n(&_M_use_count, __ATOMIC_RELAXED0);
    }

  private:
    _Sp_counted_base(_Sp_counted_base const&) = delete;
    _Sp_counted_base& operator=(_Sp_counted_base const&) = delete;

    _Atomic_word  _M_use_count;     // #shared
    _Atomic_word  _M_weak_count;    // #weak + (#shared != 0)
  };

template<>
  inline void
  _Sp_counted_base<_S_single>::
  _M_add_ref_lock()
  {
    if (_M_use_count == 0)
__throw_bad_weak_ptr();
    ++_M_use_count;
  }

template<>
  inline void
  _Sp_counted_base<_S_mutex>::
  _M_add_ref_lock()
  {
    __gnu_cxx::__scoped_lock sentry(*this);
    if (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, 1) == 0)
{
 _M_use_count = 0;
 __throw_bad_weak_ptr();
}
  }

template<>
  inline void
  _Sp_counted_base<_S_atomic>::
  _M_add_ref_lock()
  {
    // Perform lock-free add-if-not-zero operation.
    _Atomic_word __count = _M_get_use_count();
    do
{
 if (__count == 0)
   __throw_bad_weak_ptr();
 // Replace the current counter value with the old value + 1, as
 // long as it's not changed meanwhile.
}
    while (!__atomic_compare_exchange_n(&_M_use_count, &__count, __count + 1,
			  true, __ATOMIC_ACQ_REL4,
			  __ATOMIC_RELAXED0));
  }

template<>
  inline bool
  _Sp_counted_base<_S_single>::
  _M_add_ref_lock_nothrow()
  {
    if (_M_use_count == 0)
return false;
    ++_M_use_count;
    return true;
  }

template<>
  inline bool
  _Sp_counted_base<_S_mutex>::
  _M_add_ref_lock_nothrow()
  {
    __gnu_cxx::__scoped_lock sentry(*this);
    if (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, 1) == 0)
{
 _M_use_count = 0;
 return false;
}
    return true;
  }

template<>
  inline bool
  _Sp_counted_base<_S_atomic>::
  _M_add_ref_lock_nothrow()
  {
    // Perform lock-free add-if-not-zero operation.
    _Atomic_word __count = _M_get_use_count();
    do
{
 if (__count == 0)
   return false;
 // Replace the current counter value with the old value + 1, as
 // long as it's not changed meanwhile.
}
    while (!__atomic_compare_exchange_n(&_M_use_count, &__count, __count + 1,
			  true, __ATOMIC_ACQ_REL4,
			  __ATOMIC_RELAXED0));
    return true;
  }

template<>
  inline void
  _Sp_counted_base<_S_single>::_M_add_ref_copy()
  { ++_M_use_count; }

template<>
  inline void
  _Sp_counted_base<_S_single>::_M_release() noexcept
  {
    if (--_M_use_count == 0)
      {
        _M_dispose();
        if (--_M_weak_count == 0)
          _M_destroy();
      }
  }

template<>
  inline void
  _Sp_counted_base<_S_single>::_M_weak_add_ref() noexcept
  { ++_M_weak_count; }

template<>
  inline void
  _Sp_counted_base<_S_single>::_M_weak_release() noexcept
  {
    if (--_M_weak_count == 0)
      _M_destroy();
  }

template<>
  inline long
  _Sp_counted_base<_S_single>::_M_get_use_count() const noexcept
  { return _M_use_count; }


// Forward declarations.
template<typename _Tp, _Lock_policy _Lp = __default_lock_policy>
  class __shared_ptr;

template<typename _Tp, _Lock_policy _Lp = __default_lock_policy>
  class __weak_ptr;

template<typename _Tp, _Lock_policy _Lp = __default_lock_policy>
  class __enable_shared_from_this;

template<typename _Tp>
  class shared_ptr;

template<typename _Tp>
  class weak_ptr;

template<typename _Tp>
  struct owner_less;

template<typename _Tp>
  class enable_shared_from_this;

template<_Lock_policy _Lp = __default_lock_policy>
  class __weak_count;

template<_Lock_policy _Lp = __default_lock_policy>
  class __shared_count;


// Counted ptr with no deleter or allocator support
template<typename _Ptr, _Lock_policy _Lp>
  class _Sp_counted_ptr final : public _Sp_counted_base<_Lp>
  {
  public:
    explicit
    _Sp_counted_ptr(_Ptr __p) noexcept
    : _M_ptr(__p) { }

    virtual void
    _M_dispose() noexcept
    { delete _M_ptr; }

    virtual void
    _M_destroy() noexcept
    { delete this; }

    virtual void*
    _M_get_deleter(const std::type_info&) noexcept
    { return nullptr; }

    _Sp_counted_ptr(const _Sp_counted_ptr&) = delete;
    _Sp_counted_ptr& operator=(const _Sp_counted_ptr&) = delete;

  private:
    _Ptr             _M_ptr;
  };

template<>
  inline void
  _Sp_counted_ptr<nullptr_t, _S_single>::_M_dispose() noexcept { }

template<>
  inline void
  _Sp_counted_ptr<nullptr_t, _S_mutex>::_M_dispose() noexcept { }

template<>
  inline void
  _Sp_counted_ptr<nullptr_t, _S_atomic>::_M_dispose() noexcept { }

template<int _Nm, typename _Tp,
  bool __use_ebo = !__is_final(_Tp) && __is_empty(_Tp)>
  struct _Sp_ebo_helper;

/// Specialization using EBO.
template<int _Nm, typename _Tp>
  struct _Sp_ebo_helper<_Nm, _Tp, true> : private _Tp
  {
    explicit _Sp_ebo_helper(const _Tp& __tp) : _Tp(__tp) { }
    explicit _Sp_ebo_helper(_Tp&& __tp) : _Tp(std::move(__tp)) { }

    static _Tp&
    _S_get(_Sp_ebo_helper& __eboh) { return static_cast<_Tp&>(__eboh); }
  };

/// Specialization not using EBO.
template<int _Nm, typename _Tp>
  struct _Sp_ebo_helper<_Nm, _Tp, false>
  {
    explicit _Sp_ebo_helper(const _Tp& __tp) : _M_tp(__tp) { }
    explicit _Sp_ebo_helper(_Tp&& __tp) : _M_tp(std::move(__tp)) { }

    static _Tp&
    _S_get(_Sp_ebo_helper& __eboh)
    { return __eboh._M_tp; }

  private:
    _Tp _M_tp;
  };

// Support for custom deleter and/or allocator
template<typename _Ptr, typename _Deleter, typename _Alloc, _Lock_policy _Lp>
  class _Sp_counted_deleter final : public _Sp_counted_base<_Lp>
  {
    class _Impl : _Sp_ebo_helper<0, _Deleter>, _Sp_ebo_helper<1, _Alloc>
    {
typedef _Sp_ebo_helper<0, _Deleter>	_Del_base;
typedef _Sp_ebo_helper<1, _Alloc>	_Alloc_base;

    public:
_Impl(_Ptr __p, _Deleter __d, const _Alloc& __a) noexcept
: _M_ptr(__p), _Del_base(std::move(__d)), _Alloc_base(__a)
{ }

_Deleter& _M_del() noexcept { return _Del_base::_S_get(*this); }
_Alloc& _M_alloc() noexcept { return _Alloc_base::_S_get(*this); }

_Ptr _M_ptr;
    };

  public:
    using __allocator_type = __alloc_rebind<_Alloc, _Sp_counted_deleter>;

    // __d(__p) must not throw.
    _Sp_counted_deleter(_Ptr __p, _Deleter __d) noexcept
    : _M_impl(__p, std::move(__d), _Alloc()) { }

    // __d(__p) must not throw.
    _Sp_counted_deleter(_Ptr __p, _Deleter __d, const _Alloc& __a) noexcept
    : _M_impl(__p, std::move(__d), __a) { }

    ~_Sp_counted_deleter() noexcept { }

    virtual void
    _M_dispose() noexcept
    { _M_impl._M_del()(_M_impl._M_ptr); }

    virtual void
    _M_destroy() noexcept
    {
__allocator_type __a(_M_impl._M_alloc());
__allocated_ptr<__allocator_type> __guard_ptr{ __a, this };
this->~_Sp_counted_deleter();
    }

    virtual void*
    _M_get_deleter(const std::type_info& __ti) noexcept
    {
487#if __cpp_rtti199711L
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 2400. shared_ptr's get_deleter() should use addressof()
      return __ti == typeid(_Deleter)
 ? std::__addressof(_M_impl._M_del())
 : nullptr;
493#else
      return nullptr;
495#endif
    }

  private:
    _Impl _M_impl;
  };

// helpers for make_shared / allocate_shared

struct _Sp_make_shared_tag
{
private:
  template<typename _Tp, typename _Alloc, _Lock_policy _Lp>
    friend class _Sp_counted_ptr_inplace;

  static const type_info&
  _S_ti() noexcept _GLIBCXX_VISIBILITY(default)__attribute__ ((__visibility__ ("default")))
  {
    alignas(type_info) static constexpr char __tag[sizeof(type_info)] = { };
    return reinterpret_cast<const type_info&>(__tag);
  }

  static bool _S_eq(const type_info&) noexcept;
};

template<typename _Alloc>
  struct _Sp_alloc_shared_tag
  {
    const _Alloc& _M_a;
  };

template<typename _Tp, typename _Alloc, _Lock_policy _Lp>
  class _Sp_counted_ptr_inplace final : public _Sp_counted_base<_Lp>
  {
    class _Impl : _Sp_ebo_helper<0, _Alloc>
    {
typedef _Sp_ebo_helper<0, _Alloc>	_A_base;

    public:
explicit _Impl(_Alloc __a) noexcept : _A_base(__a) { }

_Alloc& _M_alloc() noexcept { return _A_base::_S_get(*this); }

__gnu_cxx::__aligned_buffer<_Tp> _M_storage;
    };

  public:
    using __allocator_type = __alloc_rebind<_Alloc, _Sp_counted_ptr_inplace>;

    // Alloc parameter is not a reference so doesn't alias anything in __args
    template<typename... _Args>
_Sp_counted_ptr_inplace(_Alloc __a, _Args&&... __args)
: _M_impl(__a)
{
 // _GLIBCXX_RESOLVE_LIB_DEFECTS
 // 2070.  allocate_shared should use allocator_traits<A>::construct
 allocator_traits<_Alloc>::construct(__a, _M_ptr(),
     std::forward<_Args>(__args)...); // might throw
}

    ~_Sp_counted_ptr_inplace() noexcept { }

    virtual void
    _M_dispose() noexcept
    {
allocator_traits<_Alloc>::destroy(_M_impl._M_alloc(), _M_ptr());
    }

    // Override because the allocator needs to know the dynamic type
    virtual void
    _M_destroy() noexcept
    {
__allocator_type __a(_M_impl._M_alloc());
__allocated_ptr<__allocator_type> __guard_ptr{ __a, this };
this->~_Sp_counted_ptr_inplace();
    }

  private:
    friend class __shared_count<_Lp>; // To be able to call _M_ptr().

    // No longer used, but code compiled against old libstdc++ headers
    // might still call it from __shared_ptr ctor to get the pointer out.
    virtual void*
    _M_get_deleter(const std::type_info& __ti) noexcept override
    {
auto __ptr = const_cast<typename remove_cv<_Tp>::type*>(_M_ptr());
// Check for the fake type_info first, so we don't try to access it
// as a real type_info object. Otherwise, check if it's the real
// type_info for this class. With RTTI enabled we can check directly,
// or call a library function to do it.
if (&__ti == &_Sp_make_shared_tag::_S_ti()
   ||
587#if __cpp_rtti199711L
   __ti == typeid(_Sp_make_shared_tag)
589#else
   _Sp_make_shared_tag::_S_eq(__ti)
591#endif
  )
 return __ptr;
return nullptr;
    }

    _Tp* _M_ptr() noexcept { return _M_impl._M_storage._M_ptr(); }

    _Impl _M_impl;
  };

// The default deleter for shared_ptr<T[]> and shared_ptr<T[N]>.
struct __sp_array_delete
{
  template<typename _Yp>
    void operator()(_Yp* __p) const { delete[] __p; }
};

template<_Lock_policy _Lp>
  class __shared_count
  {
    template<typename _Tp>
struct __not_alloc_shared_tag { using type = void; };

    template<typename _Tp>
struct __not_alloc_shared_tag<_Sp_alloc_shared_tag<_Tp>> { };

  public:
    constexpr __shared_count() noexcept : _M_pi(0)
    { }

    template<typename _Ptr>
      explicit
__shared_count(_Ptr __p) : _M_pi(0)
{
 __trytry
   {
     _M_pi = new _Sp_counted_ptr<_Ptr, _Lp>(__p);
   }
 __catch(...)catch(...)
   {
     delete __p;
     __throw_exception_againthrow;
   }
}

    template<typename _Ptr>
__shared_count(_Ptr __p, /* is_array = */ false_type)
: __shared_count(__p)
{ }

    template<typename _Ptr>
__shared_count(_Ptr __p, /* is_array = */ true_type)
: __shared_count(__p, __sp_array_delete{}, allocator<void>())
{ }

    template<typename _Ptr, typename _Deleter,
      typename = typename __not_alloc_shared_tag<_Deleter>::type>
__shared_count(_Ptr __p, _Deleter __d)
: __shared_count(__p, std::move(__d), allocator<void>())
{ }

    template<typename _Ptr, typename _Deleter, typename _Alloc,
      typename = typename __not_alloc_shared_tag<_Deleter>::type>
__shared_count(_Ptr __p, _Deleter __d, _Alloc __a) : _M_pi(0)
{
 typedef _Sp_counted_deleter<_Ptr, _Deleter, _Alloc, _Lp> _Sp_cd_type;
 __trytry
   {
     typename _Sp_cd_type::__allocator_type __a2(__a);
     auto __guard = std::__allocate_guarded(__a2);
     _Sp_cd_type* __mem = __guard.get();
     ::new (__mem) _Sp_cd_type(__p, std::move(__d), std::move(__a));
     _M_pi = __mem;
     __guard = nullptr;
   }
 __catch(...)catch(...)
   {
     __d(__p); // Call _Deleter on __p.
     __throw_exception_againthrow;
   }
}

    template<typename _Tp, typename _Alloc, typename... _Args>
__shared_count(_Tp*& __p, _Sp_alloc_shared_tag<_Alloc> __a,
       _Args&&... __args)
{
 typedef _Sp_counted_ptr_inplace<_Tp, _Alloc, _Lp> _Sp_cp_type;
 typename _Sp_cp_type::__allocator_type __a2(__a._M_a);
 auto __guard = std::__allocate_guarded(__a2);
 _Sp_cp_type* __mem = __guard.get();
 auto __pi = ::new (__mem)
   _Sp_cp_type(__a._M_a, std::forward<_Args>(__args)...);
 __guard = nullptr;
 _M_pi = __pi;
 __p = __pi->_M_ptr();
}

689#if _GLIBCXX_USE_DEPRECATED1
690#pragma GCC diagnostic push
691#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
    // Special case for auto_ptr<_Tp> to provide the strong guarantee.
    template<typename _Tp>
      explicit
__shared_count(std::auto_ptr<_Tp>&& __r);
696#pragma GCC diagnostic pop
697#endif

    // Special case for unique_ptr<_Tp,_Del> to provide the strong guarantee.
    template<typename _Tp, typename _Del>
      explicit
__shared_count(std::unique_ptr<_Tp, _Del>&& __r) : _M_pi(0)
{
 // _GLIBCXX_RESOLVE_LIB_DEFECTS
 // 2415. Inconsistency between unique_ptr and shared_ptr
 if (__r.get() == nullptr)
   return;

 using _Ptr = typename unique_ptr<_Tp, _Del>::pointer;
 using _Del2 = typename conditional<is_reference<_Del>::value,
     reference_wrapper<typename remove_reference<_Del>::type>,
     _Del>::type;
 using _Sp_cd_type
   = _Sp_counted_deleter<_Ptr, _Del2, allocator<void>, _Lp>;
 using _Alloc = allocator<_Sp_cd_type>;
 using _Alloc_traits = allocator_traits<_Alloc>;
 _Alloc __a;
 _Sp_cd_type* __mem = _Alloc_traits::allocate(__a, 1);
 _Alloc_traits::construct(__a, __mem, __r.release(),
		   __r.get_deleter());  // non-throwing
 _M_pi = __mem;
}

    // Throw bad_weak_ptr when __r._M_get_use_count() == 0.
    explicit __shared_count(const __weak_count<_Lp>& __r);

    // Does not throw if __r._M_get_use_count() == 0, caller must check.
    explicit __shared_count(const __weak_count<_Lp>& __r, std::nothrow_t);

    ~__shared_count() noexcept
    {
if (_M_pi != nullptr)
 _M_pi->_M_release();
    }

    __shared_count(const __shared_count& __r) noexcept
    : _M_pi(__r._M_pi)
    {
if (_M_pi != 0)
 _M_pi->_M_add_ref_copy();
    }

    __shared_count&
    operator=(const __shared_count& __r) noexcept
    {
_Sp_counted_base<_Lp>* __tmp = __r._M_pi;
if (__tmp != _M_pi)
 {
   if (__tmp != 0)
     __tmp->_M_add_ref_copy();
   if (_M_pi != 0)
     _M_pi->_M_release();
   _M_pi = __tmp;
 }
return *this;
    }

    void
    _M_swap(__shared_count& __r) noexcept
    {
_Sp_counted_base<_Lp>* __tmp = __r._M_pi;
__r._M_pi = _M_pi;
_M_pi = __tmp;
    }

    long
    _M_get_use_count() const noexcept
    { return _M_pi != 0 ? _M_pi->_M_get_use_count() : 0; }

    bool
    _M_unique() const noexcept
    { return this->_M_get_use_count() == 1; }

    void*
    _M_get_deleter(const std::type_info& __ti) const noexcept
    { return _M_pi ? _M_pi->_M_get_deleter(__ti) : nullptr; }

    bool
    _M_less(const __shared_count& __rhs) const noexcept
    { return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi, __rhs._M_pi); }

    bool
    _M_less(const __weak_count<_Lp>& __rhs) const noexcept
    { return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi, __rhs._M_pi); }

    // Friend function injected into enclosing namespace and found by ADL
    friend inline bool
    operator==(const __shared_count& __a, const __shared_count& __b) noexcept
    { return __a._M_pi == __b._M_pi; }

  private:
    friend class __weak_count<_Lp>;

    _Sp_counted_base<_Lp>*  _M_pi;
  };


template<_Lock_policy _Lp>
  class __weak_count
  {
  public:
    constexpr __weak_count() noexcept : _M_pi(nullptr)
    { }

    __weak_count(const __shared_count<_Lp>& __r) noexcept
    : _M_pi(__r._M_pi)
    {
if (_M_pi != nullptr)
 _M_pi->_M_weak_add_ref();
    }

    __weak_count(const __weak_count& __r) noexcept
    : _M_pi(__r._M_pi)
    {
if (_M_pi != nullptr)
 _M_pi->_M_weak_add_ref();
    }

    __weak_count(__weak_count&& __r) noexcept
    : _M_pi(__r._M_pi)
    { __r._M_pi = nullptr; }

    ~__weak_count() noexcept
    {
if (_M_pi != nullptr)
 _M_pi->_M_weak_release();
    }

    __weak_count&
    operator=(const __shared_count<_Lp>& __r) noexcept
    {
_Sp_counted_base<_Lp>* __tmp = __r._M_pi;
if (__tmp != nullptr)
 __tmp->_M_weak_add_ref();
if (_M_pi != nullptr)
 _M_pi->_M_weak_release();
_M_pi = __tmp;
return *this;
    }

    __weak_count&
    operator=(const __weak_count& __r) noexcept
    {
_Sp_counted_base<_Lp>* __tmp = __r._M_pi;
if (__tmp != nullptr)
 __tmp->_M_weak_add_ref();
if (_M_pi != nullptr)
 _M_pi->_M_weak_release();
_M_pi = __tmp;
return *this;
    }

    __weak_count&
    operator=(__weak_count&& __r) noexcept
    {
if (_M_pi != nullptr)
 _M_pi->_M_weak_release();
_M_pi = __r._M_pi;
      __r._M_pi = nullptr;
return *this;
    }

    void
    _M_swap(__weak_count& __r) noexcept
    {
_Sp_counted_base<_Lp>* __tmp = __r._M_pi;
__r._M_pi = _M_pi;
_M_pi = __tmp;
    }

    long
    _M_get_use_count() const noexcept
    { return _M_pi != nullptr ? _M_pi->_M_get_use_count() : 0; }

    bool
    _M_less(const __weak_count& __rhs) const noexcept
    { return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi, __rhs._M_pi); }

    bool
    _M_less(const __shared_count<_Lp>& __rhs) const noexcept
    { return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi, __rhs._M_pi); }

    // Friend function injected into enclosing namespace and found by ADL
    friend inline bool
    operator==(const __weak_count& __a, const __weak_count& __b) noexcept
    { return __a._M_pi == __b._M_pi; }

  private:
    friend class __shared_count<_Lp>;

    _Sp_counted_base<_Lp>*  _M_pi;
  };

// Now that __weak_count is defined we can define this constructor:
template<_Lock_policy _Lp>
  inline
  __shared_count<_Lp>::__shared_count(const __weak_count<_Lp>& __r)
  : _M_pi(__r._M_pi)
  {
    if (_M_pi != nullptr)
_M_pi->_M_add_ref_lock();
    else
__throw_bad_weak_ptr();
  }

// Now that __weak_count is defined we can define this constructor:
template<_Lock_policy _Lp>
  inline
  __shared_count<_Lp>::
  __shared_count(const __weak_count<_Lp>& __r, std::nothrow_t)
  : _M_pi(__r._M_pi)
  {
    if (_M_pi != nullptr)
if (!_M_pi->_M_add_ref_lock_nothrow())
 _M_pi = nullptr;
  }

918#define __cpp_lib_shared_ptr_arrays201611L 201611L

// Helper traits for shared_ptr of array:

// A pointer type Y* is said to be compatible with a pointer type T* when
// either Y* is convertible to T* or Y is U[N] and T is U cv [].
template<typename _Yp_ptr, typename _Tp_ptr>
  struct __sp_compatible_with
  : false_type
  { };

template<typename _Yp, typename _Tp>
  struct __sp_compatible_with<_Yp*, _Tp*>
  : is_convertible<_Yp*, _Tp*>::type
  { };

template<typename _Up, size_t _Nm>
  struct __sp_compatible_with<_Up(*)[_Nm], _Up(*)[]>
  : true_type
  { };

template<typename _Up, size_t _Nm>
  struct __sp_compatible_with<_Up(*)[_Nm], const _Up(*)[]>
  : true_type
  { };

template<typename _Up, size_t _Nm>
  struct __sp_compatible_with<_Up(*)[_Nm], volatile _Up(*)[]>
  : true_type
  { };

template<typename _Up, size_t _Nm>
  struct __sp_compatible_with<_Up(*)[_Nm], const volatile _Up(*)[]>
  : true_type
  { };

// Test conversion from Y(*)[N] to U(*)[N] without forming invalid type Y[N].
template<typename _Up, size_t _Nm, typename _Yp, typename = void>
  struct __sp_is_constructible_arrN
  : false_type
  { };

template<typename _Up, size_t _Nm, typename _Yp>
  struct __sp_is_constructible_arrN<_Up, _Nm, _Yp, __void_t<_Yp[_Nm]>>
  : is_convertible<_Yp(*)[_Nm], _Up(*)[_Nm]>::type
  { };

// Test conversion from Y(*)[] to U(*)[] without forming invalid type Y[].
template<typename _Up, typename _Yp, typename = void>
  struct __sp_is_constructible_arr
  : false_type
  { };

template<typename _Up, typename _Yp>
  struct __sp_is_constructible_arr<_Up, _Yp, __void_t<_Yp[]>>
  : is_convertible<_Yp(*)[], _Up(*)[]>::type
  { };

// Trait to check if shared_ptr<T> can be constructed from Y*.
template<typename _Tp, typename _Yp>
  struct __sp_is_constructible;

// When T is U[N], Y(*)[N] shall be convertible to T*;
template<typename _Up, size_t _Nm, typename _Yp>
  struct __sp_is_constructible<_Up[_Nm], _Yp>
  : __sp_is_constructible_arrN<_Up, _Nm, _Yp>::type
  { };

// when T is U[], Y(*)[] shall be convertible to T*;
template<typename _Up, typename _Yp>
  struct __sp_is_constructible<_Up[], _Yp>
  : __sp_is_constructible_arr<_Up, _Yp>::type
  { };

// otherwise, Y* shall be convertible to T*.
template<typename _Tp, typename _Yp>
  struct __sp_is_constructible
  : is_convertible<_Yp*, _Tp*>::type
  { };


// Define operator* and operator-> for shared_ptr<T>.
template<typename _Tp, _Lock_policy _Lp,
  bool = is_array<_Tp>::value, bool = is_void<_Tp>::value>
  class __shared_ptr_access
  {
  public:
    using element_type = _Tp;

    element_type&
    operator*() const noexcept
    {
__glibcxx_assert(_M_get() != nullptr);
return *_M_get();
    }

    element_type*
    operator->() const noexcept
    {
_GLIBCXX_DEBUG_PEDASSERT(_M_get() != nullptr);
return _M_get();
    }

  private:
    element_type*
    _M_get() const noexcept
    { return static_cast<const __shared_ptr<_Tp, _Lp>*>(this)->get(); }
  };

// Define operator-> for shared_ptr<cv void>.
template<typename _Tp, _Lock_policy _Lp>
  class __shared_ptr_access<_Tp, _Lp, false, true>
  {
  public:
    using element_type = _Tp;

    element_type*
    operator->() const noexcept
    {
auto __ptr = static_cast<const __shared_ptr<_Tp, _Lp>*>(this)->get();
_GLIBCXX_DEBUG_PEDASSERT(__ptr != nullptr);
return __ptr;
    }
  };

// Define operator[] for shared_ptr<T[]> and shared_ptr<T[N]>.
template<typename _Tp, _Lock_policy _Lp>
  class __shared_ptr_access<_Tp, _Lp, true, false>
  {
  public:
    using element_type = typename remove_extent<_Tp>::type;

1050#if __cplusplus201703L <= 201402L
    [[__deprecated__("shared_ptr<T[]>::operator* is absent from C++17")]]
    element_type&
    operator*() const noexcept
    {
__glibcxx_assert(_M_get() != nullptr);
return *_M_get();
    }

    [[__deprecated__("shared_ptr<T[]>::operator-> is absent from C++17")]]
    element_type*
    operator->() const noexcept
    {
_GLIBCXX_DEBUG_PEDASSERT(_M_get() != nullptr);
return _M_get();
    }
1066#endif

    element_type&
    operator[](ptrdiff_t __i) const
    {
__glibcxx_assert(_M_get() != nullptr);
__glibcxx_assert(!extent<_Tp>::value || __i < extent<_Tp>::value);
return _M_get()[__i];
    }

  private:
    element_type*
    _M_get() const noexcept
    { return static_cast<const __shared_ptr<_Tp, _Lp>*>(this)->get(); }
  };

template<typename _Tp, _Lock_policy _Lp>
  class __shared_ptr
  : public __shared_ptr_access<_Tp, _Lp>
  {
  public:
    using element_type = typename remove_extent<_Tp>::type;

  private:
    // Constraint for taking ownership of a pointer of type _Yp*:
    template<typename _Yp>
using _SafeConv
 = typename enable_if<__sp_is_constructible<_Tp, _Yp>::value>::type;

    // Constraint for construction from shared_ptr and weak_ptr:
    template<typename _Yp, typename _Res = void>
using _Compatible = typename
 enable_if<__sp_compatible_with<_Yp*, _Tp*>::value, _Res>::type;

    // Constraint for assignment from shared_ptr and weak_ptr:
    template<typename _Yp>
using _Assignable = _Compatible<_Yp, __shared_ptr&>;

    // Constraint for construction from unique_ptr:
    template<typename _Yp, typename _Del, typename _Res = void,
      typename _Ptr = typename unique_ptr<_Yp, _Del>::pointer>
using _UniqCompatible = typename enable_if<__and_<
 __sp_compatible_with<_Yp*, _Tp*>, is_convertible<_Ptr, element_type*>
 >::value, _Res>::type;

    // Constraint for assignment from unique_ptr:
    template<typename _Yp, typename _Del>
using _UniqAssignable = _UniqCompatible<_Yp, _Del, __shared_ptr&>;

  public:

1117#if __cplusplus201703L > 201402L
    using weak_type = __weak_ptr<_Tp, _Lp>;
1119#endif

    constexpr __shared_ptr() noexcept
    : _M_ptr(0), _M_refcount()
    { }

    template<typename _Yp, typename = _SafeConv<_Yp>>
explicit
__shared_ptr(_Yp* __p)
: _M_ptr(__p), _M_refcount(__p, typename is_array<_Tp>::type())
{
 static_assert( !is_void<_Yp>::value, "incomplete type" );
 static_assert( sizeof(_Yp) > 0, "incomplete type" );
 _M_enable_shared_from_this_with(__p);
}

    template<typename _Yp, typename _Deleter, typename = _SafeConv<_Yp>>
__shared_ptr(_Yp* __p, _Deleter __d)
: _M_ptr(__p), _M_refcount(__p, std::move(__d))
{
 static_assert(__is_invocable<_Deleter&, _Yp*&>::value,
     "deleter expression d(p) is well-formed");
 _M_enable_shared_from_this_with(__p);
}

    template<typename _Yp, typename _Deleter, typename _Alloc,
      typename = _SafeConv<_Yp>>
__shared_ptr(_Yp* __p, _Deleter __d, _Alloc __a)
: _M_ptr(__p), _M_refcount(__p, std::move(__d), std::move(__a))
{
 static_assert(__is_invocable<_Deleter&, _Yp*&>::value,
     "deleter expression d(p) is well-formed");
 _M_enable_shared_from_this_with(__p);
}

    template<typename _Deleter>
__shared_ptr(nullptr_t __p, _Deleter __d)
: _M_ptr(0), _M_refcount(__p, std::move(__d))
{ }

    template<typename _Deleter, typename _Alloc>
      __shared_ptr(nullptr_t __p, _Deleter __d, _Alloc __a)
: _M_ptr(0), _M_refcount(__p, std::move(__d), std::move(__a))
{ }

    // Aliasing constructor
    template<typename _Yp>
__shared_ptr(const __shared_ptr<_Yp, _Lp>& __r,
     element_type* __p) noexcept
: _M_ptr(__p), _M_refcount(__r._M_refcount) // never throws
{ }

    // Aliasing constructor
    template<typename _Yp>
__shared_ptr(__shared_ptr<_Yp, _Lp>&& __r,
     element_type* __p) noexcept
: _M_ptr(__p), _M_refcount()
{
 _M_refcount._M_swap(__r._M_refcount);
 __r._M_ptr = 0;
}

    __shared_ptr(const __shared_ptr&) noexcept = default;
    __shared_ptr& operator=(const __shared_ptr&) noexcept = default;
    ~__shared_ptr() = default;

    template<typename _Yp, typename = _Compatible<_Yp>>
__shared_ptr(const __shared_ptr<_Yp, _Lp>& __r) noexcept
: _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount)
{ }

    __shared_ptr(__shared_ptr&& __r) noexcept
    : _M_ptr(__r._M_ptr), _M_refcount()
    {
_M_refcount._M_swap(__r._M_refcount);
__r._M_ptr = 0;
    }

    template<typename _Yp, typename = _Compatible<_Yp>>
__shared_ptr(__shared_ptr<_Yp, _Lp>&& __r) noexcept
: _M_ptr(__r._M_ptr), _M_refcount()
{
 _M_refcount._M_swap(__r._M_refcount);
 __r._M_ptr = 0;
}

    template<typename _Yp, typename = _Compatible<_Yp>>
explicit __shared_ptr(const __weak_ptr<_Yp, _Lp>& __r)
: _M_refcount(__r._M_refcount) // may throw
{
 // It is now safe to copy __r._M_ptr, as
 // _M_refcount(__r._M_refcount) did not throw.
 _M_ptr = __r._M_ptr;
}

    // If an exception is thrown this constructor has no effect.
    template<typename _Yp, typename _Del,
      typename = _UniqCompatible<_Yp, _Del>>
__shared_ptr(unique_ptr<_Yp, _Del>&& __r)
: _M_ptr(__r.get()), _M_refcount()
{
 auto __raw = __to_address(__r.get());
 _M_refcount = __shared_count<_Lp>(std::move(__r));
 _M_enable_shared_from_this_with(__raw);
}

1225#if __cplusplus201703L <= 201402L && _GLIBCXX_USE_DEPRECATED1
  protected:
    // If an exception is thrown this constructor has no effect.
    template<typename _Tp1, typename _Del,
      typename enable_if<__and_<
 __not_<is_array<_Tp>>, is_array<_Tp1>,
        is_convertible<typename unique_ptr<_Tp1, _Del>::pointer, _Tp*>
      >::value, bool>::type = true>
__shared_ptr(unique_ptr<_Tp1, _Del>&& __r, __sp_array_delete)
: _M_ptr(__r.get()), _M_refcount()
{
 auto __raw = __to_address(__r.get());
 _M_refcount = __shared_count<_Lp>(std::move(__r));
 _M_enable_shared_from_this_with(__raw);
}
  public:
1241#endif

1243#if _GLIBCXX_USE_DEPRECATED1
1244#pragma GCC diagnostic push
1245#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
    // Postcondition: use_count() == 1 and __r.get() == 0
    template<typename _Yp, typename = _Compatible<_Yp>>
__shared_ptr(auto_ptr<_Yp>&& __r);
1249#pragma GCC diagnostic pop
1250#endif

    constexpr __shared_ptr(nullptr_t) noexcept : __shared_ptr() { }

    template<typename _Yp>
_Assignable<_Yp>
operator=(const __shared_ptr<_Yp, _Lp>& __r) noexcept
{
 _M_ptr = __r._M_ptr;
 _M_refcount = __r._M_refcount; // __shared_count::op= doesn't throw
 return *this;
}

1263#if _GLIBCXX_USE_DEPRECATED1
1264#pragma GCC diagnostic push
1265#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
    template<typename _Yp>
_Assignable<_Yp>
operator=(auto_ptr<_Yp>&& __r)
{
 __shared_ptr(std::move(__r)).swap(*this);
 return *this;
}
1273#pragma GCC diagnostic pop
1274#endif

    __shared_ptr&
    operator=(__shared_ptr&& __r) noexcept
    {
__shared_ptr(std::move(__r)).swap(*this);
return *this;
    }

    template<class _Yp>
_Assignable<_Yp>
operator=(__shared_ptr<_Yp, _Lp>&& __r) noexcept
{
 __shared_ptr(std::move(__r)).swap(*this);
 return *this;
}

    template<typename _Yp, typename _Del>
_UniqAssignable<_Yp, _Del>
operator=(unique_ptr<_Yp, _Del>&& __r)
{
 __shared_ptr(std::move(__r)).swap(*this);
 return *this;
}

    void
    reset() noexcept
    { __shared_ptr().swap(*this); }

    template<typename _Yp>
_SafeConv<_Yp>
reset(_Yp* __p) // _Yp must be complete.
{
 // Catch self-reset errors.
 __glibcxx_assert(__p == 0 || __p != _M_ptr);
 __shared_ptr(__p).swap(*this);
}

    template<typename _Yp, typename _Deleter>
_SafeConv<_Yp>
reset(_Yp* __p, _Deleter __d)
{ __shared_ptr(__p, std::move(__d)).swap(*this); }

    template<typename _Yp, typename _Deleter, typename _Alloc>
_SafeConv<_Yp>
reset(_Yp* __p, _Deleter __d, _Alloc __a)
      { __shared_ptr(__p, std::move(__d), std::move(__a)).swap(*this); }

    /// Return the stored pointer.
    element_type*
    get() const noexcept
    { return _M_ptr; }

    /// Return true if the stored pointer is not null.
    explicit operator bool() const // never throws
    { return _M_ptr == 0 ? false : true; }
16
←
Assuming field '_M_ptr' is equal to null→
17
←
'?' condition is true→
18
←
Returning zero, which participates in a condition later→

    /// Return true if use_count() == 1.
    bool
    unique() const noexcept
    { return _M_refcount._M_unique(); }

    /// If *this owns a pointer, return the number of owners, otherwise zero.
    long
    use_count() const noexcept
    { return _M_refcount._M_get_use_count(); }

    /// Exchange both the owned pointer and the stored pointer.
    void
    swap(__shared_ptr<_Tp, _Lp>& __other) noexcept
    {
std::swap(_M_ptr, __other._M_ptr);
_M_refcount._M_swap(__other._M_refcount);
    }

    /** @brief Define an ordering based on ownership.
     *
     * This function defines a strict weak ordering between two shared_ptr
     * or weak_ptr objects, such that one object is less than the other
     * unless they share ownership of the same pointer, or are both empty.
     * @{
    */
    template<typename _Tp1>
bool
owner_before(__shared_ptr<_Tp1, _Lp> const& __rhs) const noexcept
{ return _M_refcount._M_less(__rhs._M_refcount); }

    template<typename _Tp1>
bool
owner_before(__weak_ptr<_Tp1, _Lp> const& __rhs) const noexcept
{ return _M_refcount._M_less(__rhs._M_refcount); }
    // @}

  protected:
    // This constructor is non-standard, it is used by allocate_shared.
    template<typename _Alloc, typename... _Args>
__shared_ptr(_Sp_alloc_shared_tag<_Alloc> __tag, _Args&&... __args)
: _M_ptr(), _M_refcount(_M_ptr, __tag, std::forward<_Args>(__args)...)
{ _M_enable_shared_from_this_with(_M_ptr); }

    template<typename _Tp1, _Lock_policy _Lp1, typename _Alloc,
      typename... _Args>
friend __shared_ptr<_Tp1, _Lp1>
__allocate_shared(const _Alloc& __a, _Args&&... __args);

    // This constructor is used by __weak_ptr::lock() and
    // shared_ptr::shared_ptr(const weak_ptr&, std::nothrow_t).
    __shared_ptr(const __weak_ptr<_Tp, _Lp>& __r, std::nothrow_t)
    : _M_refcount(__r._M_refcount, std::nothrow)
    {
_M_ptr = _M_refcount._M_get_use_count() ? __r._M_ptr : nullptr;
    }

    friend class __weak_ptr<_Tp, _Lp>;

  private:

    template<typename _Yp>
using __esft_base_t = decltype(__enable_shared_from_this_base(
     std::declval<const __shared_count<_Lp>&>(),
     std::declval<_Yp*>()));

    // Detect an accessible and unambiguous enable_shared_from_this base.
    template<typename _Yp, typename = void>
struct __has_esft_base
: false_type { };

    template<typename _Yp>
struct __has_esft_base<_Yp, __void_t<__esft_base_t<_Yp>>>
: __not_<is_array<_Tp>> { }; // No enable shared_from_this for arrays

    template<typename _Yp, typename _Yp2 = typename remove_cv<_Yp>::type>
typename enable_if<__has_esft_base<_Yp2>::value>::type
_M_enable_shared_from_this_with(_Yp* __p) noexcept
{
 if (auto __base = __enable_shared_from_this_base(_M_refcount, __p))
   __base->_M_weak_assign(const_cast<_Yp2*>(__p), _M_refcount);
}

    template<typename _Yp, typename _Yp2 = typename remove_cv<_Yp>::type>
typename enable_if<!__has_esft_base<_Yp2>::value>::type
_M_enable_shared_from_this_with(_Yp*) noexcept
{ }

    void*
    _M_get_deleter(const std::type_info& __ti) const noexcept
    { return _M_refcount._M_get_deleter(__ti); }

    template<typename _Tp1, _Lock_policy _Lp1> friend class __shared_ptr;
    template<typename _Tp1, _Lock_policy _Lp1> friend class __weak_ptr;

    template<typename _Del, typename _Tp1, _Lock_policy _Lp1>
friend _Del* get_deleter(const __shared_ptr<_Tp1, _Lp1>&) noexcept;

    template<typename _Del, typename _Tp1>
friend _Del* get_deleter(const shared_ptr<_Tp1>&) noexcept;

    element_type*	   _M_ptr;         // Contained pointer.
    __shared_count<_Lp>  _M_refcount;    // Reference counter.
  };


// 20.7.2.2.7 shared_ptr comparisons
template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
  inline bool
  operator==(const __shared_ptr<_Tp1, _Lp>& __a,
      const __shared_ptr<_Tp2, _Lp>& __b) noexcept
  { return __a.get() == __b.get(); }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator==(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
  { return !__a; }

1448#ifdef __cpp_lib_three_way_comparison
template<typename _Tp, typename _Up, _Lock_policy _Lp>
  inline strong_ordering
  operator<=>(const __shared_ptr<_Tp, _Lp>& __a,
const __shared_ptr<_Up, _Lp>& __b) noexcept
  { return compare_three_way()(__a.get(), __b.get()); }

template<typename _Tp, _Lock_policy _Lp>
  inline strong_ordering
  operator<=>(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
  {
    using pointer = typename __shared_ptr<_Tp, _Lp>::element_type*;
    return compare_three_way()(__a.get(), static_cast<pointer>(nullptr));
  }
1462#else
template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator==(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
  { return !__a; }

template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
  inline bool
  operator!=(const __shared_ptr<_Tp1, _Lp>& __a,
      const __shared_ptr<_Tp2, _Lp>& __b) noexcept
  { return __a.get() != __b.get(); }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator!=(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
  { return (bool)__a; }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator!=(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
  { return (bool)__a; }

template<typename _Tp, typename _Up, _Lock_policy _Lp>
  inline bool
  operator<(const __shared_ptr<_Tp, _Lp>& __a,
     const __shared_ptr<_Up, _Lp>& __b) noexcept
  {
    using _Tp_elt = typename __shared_ptr<_Tp, _Lp>::element_type;
    using _Up_elt = typename __shared_ptr<_Up, _Lp>::element_type;
    using _Vp = typename common_type<_Tp_elt*, _Up_elt*>::type;
    return less<_Vp>()(__a.get(), __b.get());
  }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator<(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
  {
    using _Tp_elt = typename __shared_ptr<_Tp, _Lp>::element_type;
    return less<_Tp_elt*>()(__a.get(), nullptr);
  }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator<(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
  {
    using _Tp_elt = typename __shared_ptr<_Tp, _Lp>::element_type;
    return less<_Tp_elt*>()(nullptr, __a.get());
  }

template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
  inline bool
  operator<=(const __shared_ptr<_Tp1, _Lp>& __a,
      const __shared_ptr<_Tp2, _Lp>& __b) noexcept
  { return !(__b < __a); }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator<=(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
  { return !(nullptr < __a); }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator<=(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
  { return !(__a < nullptr); }

template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
  inline bool
  operator>(const __shared_ptr<_Tp1, _Lp>& __a,
     const __shared_ptr<_Tp2, _Lp>& __b) noexcept
  { return (__b < __a); }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator>(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
  { return nullptr < __a; }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator>(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
  { return __a < nullptr; }

template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
  inline bool
  operator>=(const __shared_ptr<_Tp1, _Lp>& __a,
      const __shared_ptr<_Tp2, _Lp>& __b) noexcept
  { return !(__a < __b); }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator>=(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t) noexcept
  { return !(__a < nullptr); }

template<typename _Tp, _Lock_policy _Lp>
  inline bool
  operator>=(nullptr_t, const __shared_ptr<_Tp, _Lp>& __a) noexcept
  { return !(nullptr < __a); }
1558#endif // three-way comparison

// 20.7.2.2.8 shared_ptr specialized algorithms.
template<typename _Tp, _Lock_policy _Lp>
  inline void
  swap(__shared_ptr<_Tp, _Lp>& __a, __shared_ptr<_Tp, _Lp>& __b) noexcept
  { __a.swap(__b); }

// 20.7.2.2.9 shared_ptr casts

// The seemingly equivalent code:
// shared_ptr<_Tp, _Lp>(static_cast<_Tp*>(__r.get()))
// will eventually result in undefined behaviour, attempting to
// delete the same object twice.
/// static_pointer_cast
template<typename _Tp, typename _Tp1, _Lock_policy _Lp>
  inline __shared_ptr<_Tp, _Lp>
  static_pointer_cast(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
  {
    using _Sp = __shared_ptr<_Tp, _Lp>;
    return _Sp(__r, static_cast<typename _Sp::element_type*>(__r.get()));
  }

// The seemingly equivalent code:
// shared_ptr<_Tp, _Lp>(const_cast<_Tp*>(__r.get()))
// will eventually result in undefined behaviour, attempting to
// delete the same object twice.
/// const_pointer_cast
template<typename _Tp, typename _Tp1, _Lock_policy _Lp>
  inline __shared_ptr<_Tp, _Lp>
  const_pointer_cast(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
  {
    using _Sp = __shared_ptr<_Tp, _Lp>;
    return _Sp(__r, const_cast<typename _Sp::element_type*>(__r.get()));
  }

// The seemingly equivalent code:
// shared_ptr<_Tp, _Lp>(dynamic_cast<_Tp*>(__r.get()))
// will eventually result in undefined behaviour, attempting to
// delete the same object twice.
/// dynamic_pointer_cast
template<typename _Tp, typename _Tp1, _Lock_policy _Lp>
  inline __shared_ptr<_Tp, _Lp>
  dynamic_pointer_cast(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
  {
    using _Sp = __shared_ptr<_Tp, _Lp>;
    if (auto* __p = dynamic_cast<typename _Sp::element_type*>(__r.get()))
return _Sp(__r, __p);
    return _Sp();
  }

1609#if __cplusplus201703L > 201402L
template<typename _Tp, typename _Tp1, _Lock_policy _Lp>
  inline __shared_ptr<_Tp, _Lp>
  reinterpret_pointer_cast(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
  {
    using _Sp = __shared_ptr<_Tp, _Lp>;
    return _Sp(__r, reinterpret_cast<typename _Sp::element_type*>(__r.get()));
  }
1617#endif

template<typename _Tp, _Lock_policy _Lp>
  class __weak_ptr
  {
    template<typename _Yp, typename _Res = void>
using _Compatible = typename
 enable_if<__sp_compatible_with<_Yp*, _Tp*>::value, _Res>::type;

    // Constraint for assignment from shared_ptr and weak_ptr:
    template<typename _Yp>
using _Assignable = _Compatible<_Yp, __weak_ptr&>;

  public:
    using element_type = typename remove_extent<_Tp>::type;

    constexpr __weak_ptr() noexcept
    : _M_ptr(nullptr), _M_refcount()
    { }

    __weak_ptr(const __weak_ptr&) noexcept = default;

    ~__weak_ptr() = default;

    // The "obvious" converting constructor implementation:
    //
    //  template<typename _Tp1>
    //    __weak_ptr(const __weak_ptr<_Tp1, _Lp>& __r)
    //    : _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount) // never throws
    //    { }
    //
    // has a serious problem.
    //
    //  __r._M_ptr may already have been invalidated. The _M_ptr(__r._M_ptr)
    //  conversion may require access to *__r._M_ptr (virtual inheritance).
    //
    // It is not possible to avoid spurious access violations since
    // in multithreaded programs __r._M_ptr may be invalidated at any point.
    template<typename _Yp, typename = _Compatible<_Yp>>
__weak_ptr(const __weak_ptr<_Yp, _Lp>& __r) noexcept
: _M_refcount(__r._M_refcount)
      { _M_ptr = __r.lock().get(); }

    template<typename _Yp, typename = _Compatible<_Yp>>
__weak_ptr(const __shared_ptr<_Yp, _Lp>& __r) noexcept
: _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount)
{ }

    __weak_ptr(__weak_ptr&& __r) noexcept
    : _M_ptr(__r._M_ptr), _M_refcount(std::move(__r._M_refcount))
    { __r._M_ptr = nullptr; }

    template<typename _Yp, typename = _Compatible<_Yp>>
__weak_ptr(__weak_ptr<_Yp, _Lp>&& __r) noexcept
: _M_ptr(__r.lock().get()), _M_refcount(std::move(__r._M_refcount))
      { __r._M_ptr = nullptr; }

    __weak_ptr&
    operator=(const __weak_ptr& __r) noexcept = default;

    template<typename _Yp>
_Assignable<_Yp>
operator=(const __weak_ptr<_Yp, _Lp>& __r) noexcept
{
 _M_ptr = __r.lock().get();
 _M_refcount = __r._M_refcount;
 return *this;
}

    template<typename _Yp>
_Assignable<_Yp>
operator=(const __shared_ptr<_Yp, _Lp>& __r) noexcept
{
 _M_ptr = __r._M_ptr;
 _M_refcount = __r._M_refcount;
 return *this;
}

    __weak_ptr&
    operator=(__weak_ptr&& __r) noexcept
    {
_M_ptr = __r._M_ptr;
_M_refcount = std::move(__r._M_refcount);
__r._M_ptr = nullptr;
return *this;
    }

    template<typename _Yp>
_Assignable<_Yp>
operator=(__weak_ptr<_Yp, _Lp>&& __r) noexcept
{
 _M_ptr = __r.lock().get();
 _M_refcount = std::move(__r._M_refcount);
 __r._M_ptr = nullptr;
 return *this;
}

    __shared_ptr<_Tp, _Lp>
    lock() const noexcept
    { return __shared_ptr<element_type, _Lp>(*this, std::nothrow); }

    long
    use_count() const noexcept
    { return _M_refcount._M_get_use_count(); }

    bool
    expired() const noexcept
    { return _M_refcount._M_get_use_count() == 0; }

    template<typename _Tp1>
bool
owner_before(const __shared_ptr<_Tp1, _Lp>& __rhs) const noexcept
{ return _M_refcount._M_less(__rhs._M_refcount); }

    template<typename _Tp1>
bool
owner_before(const __weak_ptr<_Tp1, _Lp>& __rhs) const noexcept
{ return _M_refcount._M_less(__rhs._M_refcount); }

    void
    reset() noexcept
    { __weak_ptr().swap(*this); }

    void
    swap(__weak_ptr& __s) noexcept
    {
std::swap(_M_ptr, __s._M_ptr);
_M_refcount._M_swap(__s._M_refcount);
    }

  private:
    // Used by __enable_shared_from_this.
    void
    _M_assign(_Tp* __ptr, const __shared_count<_Lp>& __refcount) noexcept
    {
if (use_count() == 0)
 {
   _M_ptr = __ptr;
   _M_refcount = __refcount;
 }
    }

    template<typename _Tp1, _Lock_policy _Lp1> friend class __shared_ptr;
    template<typename _Tp1, _Lock_policy _Lp1> friend class __weak_ptr;
    friend class __enable_shared_from_this<_Tp, _Lp>;
    friend class enable_shared_from_this<_Tp>;

    element_type*	 _M_ptr;         // Contained pointer.
    __weak_count<_Lp>  _M_refcount;    // Reference counter.
  };

// 20.7.2.3.6 weak_ptr specialized algorithms.
template<typename _Tp, _Lock_policy _Lp>
  inline void
  swap(__weak_ptr<_Tp, _Lp>& __a, __weak_ptr<_Tp, _Lp>& __b) noexcept
  { __a.swap(__b); }

template<typename _Tp, typename _Tp1>
  struct _Sp_owner_less : public binary_function<_Tp, _Tp, bool>
  {
    bool
    operator()(const _Tp& __lhs, const _Tp& __rhs) const noexcept
    { return __lhs.owner_before(__rhs); }

    bool
    operator()(const _Tp& __lhs, const _Tp1& __rhs) const noexcept
    { return __lhs.owner_before(__rhs); }

    bool
    operator()(const _Tp1& __lhs, const _Tp& __rhs) const noexcept
    { return __lhs.owner_before(__rhs); }
  };

template<>
  struct _Sp_owner_less<void, void>
  {
    template<typename _Tp, typename _Up>
auto
operator()(const _Tp& __lhs, const _Up& __rhs) const noexcept
-> decltype(__lhs.owner_before(__rhs))
{ return __lhs.owner_before(__rhs); }

    using is_transparent = void;
  };

template<typename _Tp, _Lock_policy _Lp>
  struct owner_less<__shared_ptr<_Tp, _Lp>>
  : public _Sp_owner_less<__shared_ptr<_Tp, _Lp>, __weak_ptr<_Tp, _Lp>>
  { };

template<typename _Tp, _Lock_policy _Lp>
  struct owner_less<__weak_ptr<_Tp, _Lp>>
  : public _Sp_owner_less<__weak_ptr<_Tp, _Lp>, __shared_ptr<_Tp, _Lp>>
  { };


template<typename _Tp, _Lock_policy _Lp>
  class __enable_shared_from_this
  {
  protected:
    constexpr __enable_shared_from_this() noexcept { }

    __enable_shared_from_this(const __enable_shared_from_this&) noexcept { }

    __enable_shared_from_this&
    operator=(const __enable_shared_from_this&) noexcept
    { return *this; }

    ~__enable_shared_from_this() { }

  public:
    __shared_ptr<_Tp, _Lp>
    shared_from_this()
    { return __shared_ptr<_Tp, _Lp>(this->_M_weak_this); }

    __shared_ptr<const _Tp, _Lp>
    shared_from_this() const
    { return __shared_ptr<const _Tp, _Lp>(this->_M_weak_this); }

1836#if __cplusplus201703L > 201402L || !defined(__STRICT_ANSI__1) // c++1z or gnu++11
    __weak_ptr<_Tp, _Lp>
    weak_from_this() noexcept
    { return this->_M_weak_this; }

    __weak_ptr<const _Tp, _Lp>
    weak_from_this() const noexcept
    { return this->_M_weak_this; }
1844#endif

  private:
    template<typename _Tp1>
void
_M_weak_assign(_Tp1* __p, const __shared_count<_Lp>& __n) const noexcept
{ _M_weak_this._M_assign(__p, __n); }

    friend const __enable_shared_from_this*
    __enable_shared_from_this_base(const __shared_count<_Lp>&,
		     const __enable_shared_from_this* __p)
    { return __p; }

    template<typename, _Lock_policy>
friend class __shared_ptr;

    mutable __weak_ptr<_Tp, _Lp>  _M_weak_this;
  };

template<typename _Tp, _Lock_policy _Lp = __default_lock_policy,
  typename _Alloc, typename... _Args>
  inline __shared_ptr<_Tp, _Lp>
  __allocate_shared(const _Alloc& __a, _Args&&... __args)
  {
    return __shared_ptr<_Tp, _Lp>(_Sp_alloc_shared_tag<_Alloc>{__a},
		    std::forward<_Args>(__args)...);
  }

template<typename _Tp, _Lock_policy _Lp = __default_lock_policy,
  typename... _Args>
  inline __shared_ptr<_Tp, _Lp>
  __make_shared(_Args&&... __args)
  {
    typedef typename std::remove_const<_Tp>::type _Tp_nc;
    return std::__allocate_shared<_Tp, _Lp>(std::allocator<_Tp_nc>(),
			      std::forward<_Args>(__args)...);
  }

/// std::hash specialization for __shared_ptr.
template<typename _Tp, _Lock_policy _Lp>
  struct hash<__shared_ptr<_Tp, _Lp>>
  : public __hash_base<size_t, __shared_ptr<_Tp, _Lp>>
  {
    size_t
    operator()(const __shared_ptr<_Tp, _Lp>& __s) const noexcept
    {
return hash<typename __shared_ptr<_Tp, _Lp>::element_type*>()(
   __s.get());
    }
  };

1895_GLIBCXX_END_NAMESPACE_VERSION
1896} // namespace

1898#endif // _SHARED_PTR_BASE_H