Prevent crash when trying to release buffer from already destroyed memory pool

openVulkanoCpp/Vulkan/Resources/ManagedBuffer.hpp

@@ -33,7 +33,7 @@ namespace OpenVulkano::Vulkan
 
 		~ManagedBuffer()
 		{
-			allocation->device.destroy(buffer);
+			if (allocation) [[likely]] allocation->device.destroy(buffer);
 		}
 
 		[[nodiscard]] bool IsLast() const

openVulkanoCpp/Vulkan/Resources/MemoryPool.cpp

@@ -23,6 +23,8 @@ namespace OpenVulkano::Vulkan
 		{
 			if (memPool->FreeBuffer(buffer)) return;
 		}
+		Logger::RENDER->error("Attempted to released buffer to pool, but owning pool no longer exists!");
+		buffer->allocation = nullptr; // Allocation is no longer valid since owning pool is gone already
 		delete buffer;
 	}
 

openVulkanoCpp/Vulkan/Resources/ResourceManager.cpp

@@ -98,6 +98,7 @@ namespace OpenVulkano::Vulkan
 	{
 		transferQueue.waitIdle();
 		transferQueue = nullptr;
+		OnShutdown(this); // Notify all custom resources that it's time to die
 		geometries.clear();
 		nodes.clear();
 		textures.clear();

openVulkanoCpp/Vulkan/Resources/ResourceManager.hpp

@@ -14,6 +14,7 @@
 #include "IShaderOwner.hpp"
 #include "MemoryPool.hpp"
 #include "Base/Wrapper.hpp"
+#include "Base/Event.hpp"
 #include "Base/Render/IResourceManager.hpp"
 #include "Vulkan/Image.hpp"
 #include "Scene/Shader/DescriptorInputDescription.hpp"
@@ -134,6 +135,8 @@ namespace OpenVulkano
 			vk::DescriptorSetLayout* GetDescriptorLayoutSet(const DescriptorSetLayoutBinding& descriptorSetLayoutBinding);
 
 			VulkanShader* CreateShader(Scene::Shader* shader);
+
+			Event<ResourceManager*> OnShutdown;
 		};
 	}
 }