sscsm_ievent.h

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// SPDX-FileCopyrightText: 2024 Luanti authors
//
// SPDX-License-Identifier: LGPL-2.1-or-later
 
#pragma once
 
#include <memory>
#include <type_traits>
 
class SSCSMEnvironment;
 
// Event triggered from the main env for the SSCSM env.
struct ISSCSMEvent
{
        virtual ~ISSCSMEvent() = default;
 
        // Note: No return value (difference to ISSCSMRequest). These are not callbacks
        // that you can run at arbitrary locations, because the untrusted code could
        // then clobber your local variables.
        virtual void exec(SSCSMEnvironment *cntrl) = 0;
};
 
// FIXME: actually serialize, and replace this with a string
using SerializedSSCSMEvent = std::unique_ptr<ISSCSMEvent>;
 
template <typename T>
inline SerializedSSCSMEvent serializeSSCSMEvent(const T &event)
{
        static_assert(std::is_base_of_v<ISSCSMEvent, T>);
 
        return std::make_unique<T>(event);
}
 
inline std::unique_ptr<ISSCSMEvent> deserializeSSCSMEvent(SerializedSSCSMEvent event_serialized)
{
        // The actual deserialization will have to use a type tag, and then choose
        // the appropriate deserializer.
        return event_serialized;
}