fixed GameObject initialization

src-csharp/GameObject.cs

@@ -26,15 +26,15 @@ public class GameObject
     public Transform Transform { get; }
     public GameObject? Parent;
 
-    public Dictionary<Type, Component> Components = new();
+    public Dictionary<Type, Component> Components;
 
     private GameObject(ulong id, uint nativePoolIndex)
     {
         _id = id;
         _index = nativePoolIndex;
-        // constructor doesn't work without writing to console
-        // TODO: FIX THIS BULLSHIT
-        Console.WriteLine($"GameObject(id: {id}, nativePoolIndex: {nativePoolIndex})");
+        // Do not move this line or mono runtime will throw SEGFAULT.
+        // Mono runtime can't set values in field declaration, but initializing everything in constructor is OK. 
+        Components = new();
     }
 
     static public GameObject Create()

src/Game/GameObject.cpp

@@ -7,23 +7,23 @@ std::ostream& operator<<(std::ostream& s, Transform& t){
     return s;
 }
 
-GameObject::GameObject(Mono::Object managed_obj, GameObject *parent)
-    : object_handle(managed_obj), parent(parent) 
+GameObject::GameObject(Mono::Object managed_obj)
+    : object_handle(managed_obj) 
 {}
 
 GameObject::GameObject(GameObject &&o) :
-    transform(o.transform),
-    components(std::move(o.components)),
     object_handle(std::move(o.object_handle)),
-    parent(o.parent)
+    parent(o.parent),
+    transform(o.transform),
+    components(std::move(o.components))
 {
 }
 
-GameObject &GameObject::operator=(GameObject &&o){
-    transform = o.transform;
-    components = std::move(o.components);
+GameObject& GameObject::operator=(GameObject &&o){
     object_handle = std::move(o.object_handle);
     parent = o.parent;
+    transform = o.transform;
+    components = std::move(o.components);
     return *this;
 }
 

src/Game/GameObject.hpp

@@ -26,12 +26,17 @@ std::ostream& operator<<(std::ostream& s, Transform& t);
 
 
 class GameObject {
-    Transform transform;
-    std::map<std::u16string, Component> components;
     Mono::ObjectHandle object_handle;
     GameObject* parent;
+    Transform transform;
+    std::map<std::u16string, Component> components;
 public:
-    GameObject(Mono::Object managed_obj, GameObject* parent);
+    /// @warning Do not use this to create objects.
+    /// This constructor creates null values for GameObject arrays
+    /// GameObject* array = new GameObject[10];
+    /// array[0] = GameObject(initialized_mono_object_ptr)
+    GameObject() = default;
+    GameObject(Mono::Object managed_obj);
     GameObject(const GameObject& o) = delete;
     GameObject(GameObject&& o);
     

src/Game/GameObjectPool.cpp

@@ -7,7 +7,7 @@ GameObjectPool::GameObjectPool(u32 size)
     useful_assert(size % 64 == 0, "size of GameObjectPool must be a multiple of 64");
     this->size = size; 
     first_unused_index = 0;
-    buffer = new char[size*sizeof(GameObject)];
+    buffer = new GameObject[size];
     used_indices = new u64[size/64];
     // std::memset(buffer, 0, size*sizeof(GameObject));
     std::memset(used_indices, 0, size/8);
@@ -15,13 +15,8 @@ GameObjectPool::GameObjectPool(u32 size)
 
 GameObjectPool::~GameObjectPool()
 {
-    // int i = 0;
-    for(auto&& p : *this){
-        // std::cout<<"~GameObjectPool i="<<i++<<std::endl;
-        p.second.~GameObject();
-    }
-    delete (char*)buffer;
-    delete used_indices;
+    delete[] buffer;
+    delete[] used_indices;
 }
 
 bool GameObjectPool::isIndexUsed(u32 index)
@@ -81,7 +76,7 @@ GameObject& GameObjectPool::get(u32 index)
         throw UsefulException(format("index %i is out of size %i", index, size));
     if(!isIndexUsed(index))
         throw UsefulException(format("there is no object at index %i", index));
-    return ((GameObject*)buffer)[index];
+    return buffer[index];
 }
 
 std::pair<u32, GameObject&> GameObjectPool::emplace(GameObject&& new_obj)
@@ -89,7 +84,9 @@ std::pair<u32, GameObject&> GameObjectPool::emplace(GameObject&& new_obj)
     u32 i = first_unused_index;
     if(i == u32(-1))
         throw UsefulException("can't put new GameObject to GameObjectPool because it's full");
-    GameObject& r = ( ((GameObject*)buffer)[i] = std::move(new_obj) );
+    
+    buffer[i] = std::move(new_obj);
+    GameObject& r = buffer[i];
     used_indices[i/64] |= u64(1)<<(i%64); // mark index bit as used
     first_unused_index = getNearestUnusedIndex(i+1);
     return std::pair<u32, GameObject&>(i, r);
@@ -101,27 +98,29 @@ void GameObjectPool::erase(u32 index)
         throw UsefulException(format("index %i is out of size %i", index, size));
     if(!isIndexUsed(index))
         throw UsefulException(format("there is no object at index %i", index));
-    ((GameObject*)buffer)[index].~GameObject();
+    
+    buffer[index] = GameObject();
     used_indices[index/64] &= ~(u64(1)<<(index%64)); // mark index bit as unused
     if(index < first_unused_index)
         first_unused_index = index;
 }
 
-GameObjectPool::iterator::iterator(GameObjectPool* p, u32 index)
-    : p(p), index(index)
+GameObjectPool::iterator::iterator(GameObjectPool* pool, u32 index)
+    : pool(pool), index(index)
 {
 }
 
 std::pair<u32, GameObject&> GameObjectPool::iterator::operator*()
 {
-    if(index >= p->size)
+    if(index >= pool->size)
         throw UsefulException("can't get value of end() iterator");
-    GameObject& r = ((GameObject*)p->buffer)[index];
+    
+    GameObject& r = pool->buffer[index];
     return  std::pair<u32, GameObject&>(index, r);
 }
 
 GameObjectPool::iterator& GameObjectPool::iterator::operator++()
 {
-    index = p->getNearestUsedIndex(index+1);
+    index = pool->getNearestUsedIndex(index+1);
     return *this;
 }

src/Game/GameObjectPool.hpp

@@ -28,7 +28,7 @@ operation 'forward_list::iterate' took 2.0823 ms
 */
 
 class GameObjectPool {
-    void* buffer;
+    GameObject* buffer;
     u64* used_indices;
     u32 size;
     u32 first_unused_index;
@@ -45,17 +45,19 @@ public:
     std::pair<u32, GameObject&> emplace(GameObject&& new_obj);
     void erase(u32 index);
 
+    #pragma region iterator class
     class iterator {
-        GameObjectPool* p;
+        GameObjectPool* pool;
         u32 index = 0;
     
     public:
-        iterator(GameObjectPool* p, u32 index);
+        iterator(GameObjectPool* pool, u32 index);
         std::pair<u32, GameObject&> operator*();
         iterator& operator++();
         inline bool operator!=(const iterator& o) const { return index != o.index; };
         inline bool operator==(const iterator& o) const { return index == o.index; };
     };
+    #pragma endregion
 
     inline iterator begin() { return iterator(this, 0); }
     inline iterator end() { return iterator(this, -1); }

src/Mono/Mono.hpp

@@ -24,6 +24,8 @@ typedef f64 Double;
 typedef union { mono_bool wide_bool; } Bool; //USAGE: Bool t = {true};
 typedef char16_t Char;
 typedef MonoString* String;
+/// @warning MonoObject can be moved in memory by GC in any time and raw pointer will be invalid. 
+/// Use ObjectHandle where it is possible.
 typedef MonoObject* Object;
 typedef void Void;
 
@@ -133,25 +135,39 @@ public:
     std::shared_ptr<Assembly> loadAssembly(const std::string& name);
 };
 
-class ObjectHandle {
-    Object object;
+/// @brief ObjectHandle can be used to store reliable reference to MonoObject.
+/// MonoObject can be moved in memory by GC in any time and raw pointer will be invalid. 
+struct ObjectHandle {
     u32 gc_handle;
-public:
-    inline ObjectHandle() : object(nullptr), gc_handle(0) {}
-    inline ObjectHandle(Object obj) : object(obj) { gc_handle = mono_gchandle_new(obj, false); }
+
+    inline ObjectHandle() : gc_handle(0) {}
+
+    inline ObjectHandle(Object obj) {
+        gc_handle = mono_gchandle_new(obj, false);
+    }
+
+    /// implicitly create new ObjectHandle instead
     inline ObjectHandle(const ObjectHandle& o) = delete;
-    inline ObjectHandle(ObjectHandle&& o) 
-        : object(o.object), gc_handle(o.gc_handle) 
-    { o.gc_handle = 0; };
+
+    inline ObjectHandle(ObjectHandle&& o) {
+        gc_handle = o.gc_handle;
+        o.gc_handle = 0;
+    }
+
     inline ObjectHandle& operator=(ObjectHandle&& o) {
-        object = o.object;
         gc_handle = o.gc_handle;
         o.gc_handle = 0;
         return *this;
-    };
-    inline ~ObjectHandle() { if(gc_handle) mono_gchandle_free(gc_handle); }
-    inline Object getObject() const { return object; }
-    inline u32 getGCHandle() const { return gc_handle; }
+    }
+
+    inline ~ObjectHandle() {
+        if(gc_handle)
+            mono_gchandle_free(gc_handle);
+    }
+
+    inline Object getObject() const {
+        return mono_gchandle_get_target(gc_handle);
+    }
 };
 
 }

src/main.cpp

@@ -11,7 +11,7 @@
 
 using namespace ougge;
 
-#define GAMEOBJECTPOOL_SIZE 64*1024
+#define GAMEOBJECTPOOL_SIZE 64
 
 #define optime(N, LABEL, CODE) {\
     nsec_t b = getMonotonicTimeNsec();\
@@ -43,21 +43,20 @@ int main(int argc, const char** argv){
 
         auto a = mono.loadAssembly("Ougge.dll");
         MonoClass* gameObjectClass = a->getClass("Ougge", "GameObject");
-        MonoObject* exampleObjectManaged = mono_object_new(mono.getDomain(), gameObjectClass);
         u64 obj_id = 0;
-        auto pair = p.emplace(GameObject(exampleObjectManaged, nullptr));
+        auto pair = p.emplace(GameObject(mono_object_new(mono.getDomain(), gameObjectClass)));
+        Mono::ObjectHandle& exampleObjectHandle = pair.second.getObjectHandle();
         auto gameObjectCtor = Mono::Method<void(u64, u32)>(gameObjectClass, ".ctor");
-        gameObjectCtor(exampleObjectManaged, obj_id++, pair.first);
+        gameObjectCtor(exampleObjectHandle.getObject(), obj_id++, pair.first);
 
         auto exampleObjectUpdate = Mono::Method<void(f64)>(gameObjectClass, "InvokeUpdate");
-        updateCallbacks.push_back([exampleObjectManaged, exampleObjectUpdate](f64 deltaTime) -> void {
-            exampleObjectUpdate(exampleObjectManaged, deltaTime); 
+        updateCallbacks.push_back([&exampleObjectHandle, exampleObjectUpdate](f64 deltaTime) -> void {
+            exampleObjectUpdate(exampleObjectHandle.getObject(), deltaTime); 
         });
 
         auto tryCreateComponent = Mono::Method<Mono::Bool(Mono::String)>(gameObjectClass, "TryCreateComponent_internal");
         Mono::String componentNameManaged = mono_string_new(mono.getDomain(), "Ougge.ExampleComponent");
-        // Mono::ObjectHandle componentNameObjectHandle((MonoObject*)(void*)componentNameManaged);
-        Mono::Bool created = tryCreateComponent(exampleObjectManaged, componentNameManaged);
+        Mono::Bool created = tryCreateComponent(exampleObjectHandle.getObject(), componentNameManaged);
         if(!created.wide_bool)
             throw UsefulException("couldn't create ExampleComponent");
         

tasks/get_mono_files_from.sh

@@ -33,10 +33,10 @@ case "$OS" in
             mv -v "$l" "dependencies/precompiled/mono-libs/$soname_without_version"
         done
         
-        myprint "${BLUE}stripping debug symbols from mono shared libraries"
-        for l in $(find "dependencies/precompiled/mono-libs" -name '*.so') ; do
-            strip -g "$l"
-        done
+        # myprint "${BLUE}stripping debug symbols from mono shared libraries"
+        # for l in $(find "dependencies/precompiled/mono-libs" -name '*.so') ; do
+        #     strip -g "$l"
+        # done
 
         # copy mono c# libraries
         managed_libraries="mscorlib.dll"