CCallback.h

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#pragma once
 
using SteamAPICall_t = std::uint64_t;
 
namespace RE
{
    class CCallbackBase
    {
    public:
        enum
        {
            k_ECallbackFlagsRegistered = 0x01,
            k_ECallbackFlagsGameServer = 0x02
        };
 
        // add
        virtual void         Run(void* a_param);                                                   // 01
        virtual void         Run(void* a_param, bool a_IOFailure, SteamAPICall_t a_steamAPICall);  // 00
        virtual std::int32_t GetCallbackSizeBytes();                                               // 02
 
        // members
        std::uint8_t  callbackFlags;  // 08
        std::uint8_t  pad09;          // 09
        std::uint16_t pad0A;          // 0A
        std::int32_t  callback;       // 0C
    };
    static_assert(sizeof(CCallbackBase) == 0x10);
 
    template <class T, class P>
    class CCallResult : public CCallbackBase
    {
    public:
        using func_t = void (T::*)(P*);
 
        // override (CCallbackBase)
        void         Run(void* a_param) override;                                                   // 01
        void         Run(void* a_param, bool a_IOFailure, SteamAPICall_t a_steamAPICall) override;  // 00
        std::int32_t GetCallbackSizeBytes() override;                                               // 02
 
        // members
        SteamAPICall_t apiCall;  // 10
        T*             obj;      // 18
        func_t         func;     // 20
    };
    // size == 0x30
 
    template <class T, class P, bool bGameserver = false>
    class CCallback : public CCallbackBase
    {
    public:
        using func_t = void (T::*)(P*);
 
        // override (CCallbackBase)
        void         Run(void* a_param) override;                                                   // 01
        void         Run(void* a_param, bool a_IOFailure, SteamAPICall_t a_steamAPICall) override;  // 00
        std::int32_t GetCallbackSizeBytes() override;                                               // 02
 
        // add
        virtual ~CCallback();  // 03
 
        // members
        T*     obj;   // 10
        func_t func;  // 18
    };
    // size == 0x28
}