GFxResourceWeakLib.h

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#pragma once
 
#include "RE/G/GAtomic.h"
#include "RE/G/GFxResourceLib.h"
#include "RE/G/GFxResourceLibBase.h"
#include "RE/G/GHashSet.h"
 
namespace RE
{
    class GFxResourceWeakLib : public GFxResourceLibBase
    {
    public:
        using ResourceSlot = GFxResourceLib::ResourceSlot;
 
        struct ResourceNode
        {
            enum class NodeType
            {
                kResource,
                kResolver,
            };
 
            NodeType type;
 
            union
            {
                ResourceSlot* resolver;
                GFxResource*  resource;
            };
 
            bool operator==(const GFxResourceKey& a_src) const
            {
                assert(resource);
                if (type == NodeType::kResource) {
                    return resource->GetKey() == a_src;
                }
                return resolver->GetKey() == a_src;
            }
 
            bool operator!=(const GFxResourceKey& a_src) const
            {
                return !operator==(a_src);
            }
 
            struct HashOp
            {
                UPInt operator()(const ResourceNode& a_node) const
                {
                    assert(a_node.resource);
                    GFxResourceKey key =
                        (a_node.type == NodeType::kResource) ? a_node.resource->GetKey() : a_node.resolver->GetKey();
                    return GFxResourceKey::HashOp()(key);
                }
 
                UPInt operator()(const GFxResourceKey& a_key) const
                {
                    return GFxResourceKey::HashOp()(a_key);
                }
            };
        };
 
        // override (GFxResourceLibBase)
        void RemoveResourceOnRelease(GFxResource* a_res) override;  // 01
        void PinResource(GFxResource* a_res) override;              // 02
        void UnpinResource(GFxResource* a_res) override;            // 03
 
        // members
        GFxResourceLib*                              strongLib;     // 10
        GLock                                        resourceLock;  // 18
        GHashSet<ResourceNode, ResourceNode::HashOp> resources;     // 40
        GPtr<GMemoryHeap>                            imageHeap;     // 48
    };
    static_assert(sizeof(GFxResourceWeakLib) == 0x50);
}