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introduce fieldConstructor and fieldDestructor

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This commit is contained in:
altalk23 2022-06-25 01:19:42 +03:00
parent eb1df56b5b
commit 636652bec2
2 changed files with 16 additions and 5 deletions
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19
include/syntax/Field.hpp
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@ -6,6 +6,7 @@
namespace geode::modifier {
class FieldContainer : public cocos2d::CCObject {
std::vector<void*> m_containedFields;
std::vector<std::function<void()>> m_destructorFunctions;
public:
static FieldContainer* create() {
@ -17,18 +18,21 @@ namespace geode::modifier {
return nullptr;
}
~FieldContainer() {
for(auto ptr : m_containedFields) {
operator delete(ptr);
for(auto i = 0; i < m_containedFields.size(); ++i) {
m_destructorFunctions[i]();
operator delete(m_containedFields[i]);
}
}
void* getField(size_t index) {
if (m_containedFields.size() <= index) {
m_containedFields.resize(index + 1);
m_destructorFunctions.resize(index + 1);
}
return m_containedFields.at(index);
}
void* setField(size_t index, size_t size) {
void* setField(size_t index, size_t size, std::function<void()> destructor) {
m_containedFields.at(index) = operator new(size);
m_destructorFunctions.at(index) = destructor;
return m_containedFields.at(index);
}
};
@ -42,7 +46,7 @@ namespace geode::modifier {
template <class=std::enable_if_t<true>>
Parent* operator->() {
// get the this pointer of the base
auto node = reinterpret_cast<cocos2d::CCNode*>(reinterpret_cast<std::byte*>(this) - sizeof(Base));
auto node = reinterpret_cast<Parent*>(reinterpret_cast<std::byte*>(this) - sizeof(Base));
auto container = reinterpret_cast<FieldContainer*>(node->getUserObject());
if (!container) {
container = FieldContainer::create();
@ -51,7 +55,12 @@ namespace geode::modifier {
static size_t index = Loader::get()->getFieldIndexForClass(typeid(Base).hash_code());
// this pointer is offset
auto offsetField = container->getField(index);
if (!offsetField) offsetField = container->setField(index, sizeof(Parent) - sizeof(Intermediate));
if (!offsetField) {
offsetField = container->setField(index, sizeof(Parent) - sizeof(Intermediate),
std::bind(&Parent::fieldDestructor, node)
);
node->fieldConstructor();
}
return reinterpret_cast<Parent*>(reinterpret_cast<std::byte*>(offsetField) - sizeof(Intermediate));
}

2
include/syntax/InternalMacros.hpp
View file

@ -39,6 +39,8 @@ template <> struct GEODE_HIDDEN _##derived<derived##Intermediate> : base {
_##derived<derived##Intermediate>, \
_##derived<derived##Parent> \
> m_fields; \
void fieldConstructor() {} \
void fieldDestructor() {} \
}; \
template <> struct GEODE_HIDDEN _##derived<derived##Parent> : _##derived<derived##Intermediate> \