File indexing completed on 2024-06-16 04:23:17

 /*
     SPDX-FileCopyrightText: 2008 David Nolden <david.nolden.kdevelop@art-master.de>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #include "typerepository.h"
 
 #include <QMutex>
 #include <QMutexLocker>
 
 #include <debug.h>
 #include "../types/typesystemdata.h"
 #include "../types/typeregister.h"
 #include <serialization/referencecounting.h>
 #include <serialization/itemrepository.h>
 #include <serialization/repositorymanager.h>
 
 #define DEBUG_TYPE_REPOSITORY
 #define ASSERT_ON_PROBLEM
 
 namespace KDevelop  {
 class AbstractTypeDataRequest
 {
 public:
     AbstractTypeDataRequest(const AbstractType& type) : m_item(type)
     {
     }
 
     enum {
         AverageSize = sizeof(AbstractTypeData) + 12
     };
 
     unsigned int hash() const
     {
         return m_item.hash();
     }
 
     uint itemSize() const
     {
         return TypeSystem::self().dynamicSize(*m_item.d_ptr);
     }
 
     void createItem(AbstractTypeData* item) const
     {
         TypeSystem::self().copy(*m_item.d_ptr, *item, true);
         Q_ASSERT(!item->m_dynamic);
 #ifdef DEBUG_TYPE_REPOSITORY
         AbstractType::Ptr otherType(TypeSystem::self().create(const_cast<AbstractTypeData*>(item)));
         if (!otherType->equals(&m_item)) {
             //For debugging, so one can trace what happened
             qCWarning(LANGUAGE) << "created type in repository does not equal source type:" << m_item.toString() <<
                 otherType->toString();
             TypeSystem::self().copy(*m_item.d_ptr, *item, true);
             otherType->equals(&m_item);
         }
 #ifdef ASSERT_ON_PROBLEM
         Q_ASSERT(otherType->equals(&m_item));
 #endif
 #endif
         item->inRepository = true;
     }
 
     static void destroy(AbstractTypeData* item, KDevelop::AbstractItemRepository&)
     {
         TypeSystem::self().callDestructor(item);
     }
 
     static bool persistent(const AbstractTypeData* item)
     {
         // Don't try to delete release items for which the factory is not loaded, as that will lead to a crash/assertion later
         return ( bool )item->refCount || !TypeSystem::self().isFactoryLoaded(*item);
     }
 
     bool equals(const AbstractTypeData* item) const
     {
         if (!TypeSystem::self().isFactoryLoaded(*item))
             return false;
 
         AbstractType::Ptr otherType(TypeSystem::self().create(const_cast<AbstractTypeData*>(item)));
         Q_ASSERT(otherType);
         return m_item.equals(otherType.data());
     }
 
     const AbstractType& m_item;
 };
 
 QRecursiveMutex* typeRepositoryMutex()
 {
     static QRecursiveMutex mutex;
     return &mutex;
 }
 
 using TypeItemRepository = ItemRepository<AbstractTypeData, AbstractTypeDataRequest, true, QRecursiveMutex>;
 
 template<>
 class ItemRepositoryFor<AbstractType>
 {
     friend struct LockedItemRepository;
     static TypeItemRepository& repo()
     {
         static RepositoryManager<TypeItemRepository, false> manager(QStringLiteral("Type Repository"),
                                                                     typeRepositoryMutex());
         return *manager.repository();
     }
 };
 
 void initTypeRepository()
 {
     LockedItemRepository::initialize<AbstractType>();
 }
 
 uint TypeRepository::indexForType(const AbstractType* input)
 {
     if (!input)
         return 0;
 
     uint i = LockedItemRepository::write<AbstractType>(
         [request = AbstractTypeDataRequest(*input)](TypeItemRepository& repo) {
             return repo.index(request);
         });
 #ifdef DEBUG_TYPE_REPOSITORY
     AbstractType::Ptr t = typeForIndex(i);
     if (!t->equals(input)) {
         qCWarning(LANGUAGE) << "found type in repository does not equal source type:" << input->toString() <<
             t->toString();
         t->equals(input);
     }
 #ifdef ASSERT_ON_PROBLEM
     Q_ASSERT(t->equals(input));
     Q_ASSERT(input->equals(t.data()));
 #endif
 #endif
     return i;
 }
 
 AbstractType::Ptr TypeRepository::typeForIndex(uint index)
 {
     if (index == 0)
         return AbstractType::Ptr();
 
     return LockedItemRepository::read<AbstractType>([index](const TypeItemRepository& repo) {
         auto item = repo.itemFromIndex(index);
         return AbstractType::Ptr(TypeSystem::self().create(const_cast<AbstractTypeData*>(item)));
     });
 }
 
 template <typename RefCountChanger>
 static void changeReferenceCount(uint index, RefCountChanger changeRefCount)
 {
     if (!index)
         return;
 
     LockedItemRepository::write<AbstractType>([index, changeRefCount](TypeItemRepository& repo) {
         AbstractTypeData* data = repo.dynamicItemFromIndexSimple(index);
         Q_ASSERT(data);
         changeRefCount(data->refCount);
     });
 }
 
 void TypeRepository::increaseReferenceCount(uint index, ReferenceCountManager* manager)
 {
     changeReferenceCount(index, [index, manager](uint& refCount) {
         if (manager)
             manager->increase(refCount, index);
         else
             ++refCount;
     });
 }
 
 void TypeRepository::decreaseReferenceCount(uint index, ReferenceCountManager* manager)
 {
     changeReferenceCount(index, [index, manager](uint& refCount) {
         Q_ASSERT(refCount > 0);
         if (manager)
             manager->decrease(refCount, index);
         else
             --refCount;
     });
 }
 }