Program Listing for File event-data.h

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and your use of them is governed by the express license under which they
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 This software and the related documents are provided as is, with no express
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******************************************************************************/

#pragma once

#include "utility/uuid.h"

#include <cstddef>
#include <cstdint>

namespace gpa {

namespace serialization {
class Serializer;
}

namespace runtime {

class EventData
{
public:
    EventData() = default;
    virtual ~EventData();
    virtual utility::UUID const& GetID() const = 0;
    virtual char const* GetName() const = 0;

    size_t Serialize(serialization::Serializer*) const;
    size_t Deserialize(serialization::Serializer*);

    virtual void Init();

    virtual void Destroy();

    static size_t ReadAndCreateEventData(serialization::Serializer* serializer, EventData** ppEventData);

    class Class
    {
    public:
        Class(utility::UUID const& eventId, char const* eventName);
        virtual ~Class();

        utility::UUID const& ID() const;

        char const* Name() const;

        virtual EventData* Create() const = 0;

        static Class const* Find(utility::UUID const& eventId);

        static Class const* Classes();

        Class* mNext{nullptr};

    private:
        utility::UUID const& mEventId;
        char const* mEventName{nullptr};
    };

    template<typename T>
    class ClassDef : public Class
    {
    public:
        ClassDef(utility::UUID const& eventId, const char* name)
            : Class(eventId, name)
        {
        }

        EventData* Create() const
        {
            EventData* event = new T;
            return event;
        }
    };

    virtual Class* GetClassDef() const = 0;

protected:
    virtual size_t Write(serialization::Serializer*) const;
    virtual size_t Read(serialization::Serializer*);
    virtual uint64_t CalculatePayloadSize() const;
};

#define GPA_EVENT_CLASS(c)                                        \
public:                                                           \
    static gpa::utility::UUID const& ID;                          \
                                                                  \
    c();                                                          \
    ~c();                                                         \
    static gpa::runtime::EventData::Class* GetClass();            \
    gpa::runtime::EventData::Class* GetClassDef() const override; \
    struct MessageClassInitializer                                \
    {                                                             \
        MessageClassInitializer();                                \
    };                                                            \
    static MessageClassInitializer sMessageClassInit;             \
    gpa::utility::UUID const& GetID() const override;             \
    char const* GetName() const override;

#define GPA_EVENT_CLASS_IMPL(c, eventId)                                       \
    static gpa::utility::UUID s##c##ClassID(#eventId);                         \
    gpa::utility::UUID const& c::ID = s##c##ClassID;                           \
                                                                               \
    c::c() { Init(); }                                                         \
    c::~c() { Destroy(); }                                                     \
                                                                               \
    gpa::runtime::EventData::Class* c::GetClass()                              \
    {                                                                          \
        static gpa::runtime::EventData::ClassDef<c> sClass(s##c##ClassID, #c); \
        return &sClass;                                                        \
    }                                                                          \
                                                                               \
    gpa::runtime::EventData::Class* c::GetClassDef() const                     \
    {                                                                          \
        return GetClass();                                                     \
    }                                                                          \
    c::MessageClassInitializer::MessageClassInitializer()                      \
    {                                                                          \
        GetClass();                                                            \
        c _c;                                                                  \
    }                                                                          \
    c::MessageClassInitializer c::sMessageClassInit;                           \
    gpa::utility::UUID const& c::GetID() const { return ID; }                  \
    char const* c::GetName() const { return #c; }

}  // namespace runtime
}  // namespace gpa