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/*
SPDX-FileCopyrightText: 2022 Milian Wolff <mail@milianw.de>
SPDX-License-Identifier: LGPL-2.0-only
*/
#ifndef KDEVPLATFORM_ITEMREPOSITORYREFERENCECOUNTING_H
#define KDEVPLATFORM_ITEMREPOSITORYREFERENCECOUNTING_H
#include "itemrepository.h"
namespace KDevelop {
struct ItemRepositoryReferenceCounting {
template <typename Item>
static inline bool inc(Item* item)
{
Q_ASSERT(item);
const auto index = item->index();
Q_ASSERT(index);
if (!shouldDoDUChainReferenceCounting(item)) {
return false;
}
LockedItemRepository::write<Item>(
[&](auto& repo) { item->increase(repo.dynamicItemFromIndexSimple(index)->m_refCount, index); });
return true;
}
template <typename Item>
static inline bool dec(Item* item)
{
Q_ASSERT(item);
const auto index = item->index();
Q_ASSERT(index);
if (!shouldDoDUChainReferenceCounting(item)) {
return false;
}
LockedItemRepository::write<Item>(
[&](auto& repo) { item->decrease(repo.dynamicItemFromIndexSimple(index)->m_refCount, index); });
return true;
}
struct AssumeValidIndex {
bool operator()(unsigned int index) const
{
Q_ASSERT(index);
return true;
}
};
template <typename Item, typename CheckIndex = AssumeValidIndex>
static inline void setIndex(Item* item, unsigned int& m_index, unsigned int index,
CheckIndex checkIndex = AssumeValidIndex{})
{
Q_ASSERT(item);
if (m_index == index) {
return;
}
if (shouldDoDUChainReferenceCounting(item)) {
LockedItemRepository::write<Item>([&](auto& repo) {
if (checkIndex(m_index)) {
item->decrease(repo.dynamicItemFromIndexSimple(m_index)->m_refCount, m_index);
}
m_index = index;
if (checkIndex(m_index)) {
item->increase(repo.dynamicItemFromIndexSimple(m_index)->m_refCount, m_index);
}
});
} else {
m_index = index;
}
}
};
}
#endif
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