AuroraRuntime/Source/IO/Net/AuNetWorker.hpp

#pragma once

namespace Aurora::IO::Net
{
    struct NetSrvWorkers;

    struct NetWorker :
        INetWorker,
        AuEnableSharedFromThis<NetWorker>
    {
        NetWorker(NetSrvWorkers *pParent,
                  AuUInt8 workerIndex,
                  AuSPtr<IIOProcessor> pIOProcessor);

        AuSPtr<AuLoop::ILSEvent> ToEvent();

        bool                 IsOnThread();

        AuSPtr<IIOProcessor> ToProcessor()    override;
        AuUInt8              GetWorkerIndex() override;
        void                 Destroy()        override;
        
        bool IncrementIOEventTaskCounter();
        void DecrementIOEventTaskCounter();

        AuSPtr<IIOProcessorItem> pWorkItem_;

        void AddSocket(ISocket *pSocket);
        void RemoveSocket(ISocket *pSocket);

        AuList<ISocket *> childSockets;

        // Yea, so, we have some pretty lax rules about threading...
        template <class Status_t, class Error_t = AuNullS, class Callable_t>
        bool TryScheduleInternalTemplate(Callable_t &&work,
                                         const AuSPtr<AuAsync::PromiseCallback<Status_t, Error_t>> &callback)
        {
            struct Waiter : IIOProcessorWorkUnit
            {
                inline Waiter(const AuConsumer<const AuSPtr<AuAsync::PromiseCallback<Status_t, Error_t>> &> worker,
                                const AuSPtr<AuAsync::PromiseCallback<Status_t, Error_t>> &callbacks) :
                    callbacks_(callbacks),
                    worker_(worker)
                {
                }

                inline Waiter(const AuConsumer<const AuSPtr<AuAsync::PromiseCallback<Status_t, Error_t>> &> worker,
                              const AuSPtr<AuAsync::PromiseCallback<Status_t, Error_t>> &callbacks,
                              AuAsync::WorkerPId_t origin) :
                    callbacks_(callbacks),
                    worker_(worker),
                    origin_(origin)
                {
                    SysAssert(MakeProxy());
                }

                inline virtual void OnRun() override
                {
                    //SysAssert(this->callbacks_);
                    SysAssert(this->worker_);
                    this->worker_(this->callbacks_);
                }

                inline virtual void OnCanceled() override
                {
                    if (!this->callbacks_)
                    {
                        return;
                    }
                    //SysAssert(this->callbacks_);
                    this->callbacks_->OnFailure((void *)nullptr);
                }

                inline bool MakeProxy()
                {
                    auto old = this->callbacks_;
                    auto temp = AuMakeShared<AuAsync::PromiseCallbackFunctional<Status_t, Error_t>>([=](const AuSPtr<Status_t> &response)
                    {
                        (void)AuAsync::DispatchOn(this->origin_,[response, callbacks = old]()
                        {
                            callbacks->OnSuccess(response.get());
                        });
                    },
                                                                                           [=](const AuSPtr<Error_t> &response)
                    {
                        (void)AuAsync::DispatchOn(this->origin_, [response, callbacks = old]()
                        {
                            callbacks->OnFailure(response.get());
                        });
                    });

                    if (!temp)
                    {
                        return {};
                    }

                    this->callbacks_ = temp;
                    return true;
                }

                const AuConsumer<const AuSPtr<AuAsync::PromiseCallback<Status_t, Error_t>> &> worker_;
                AuSPtr<AuAsync::PromiseCallback<Status_t, Error_t>> callbacks_;
                AuAsync::WorkerPId_t origin_;
            };
            AuSPtr<Waiter> temp;

            auto pid = AuAsync::GetCurrentWorkerPId();
            if (pid)
            {
                temp = AuMakeShared<Waiter>(work, callback, pid);
            }
            else
            {
                temp = AuMakeShared<Waiter>(work, callback);
            }
      
            if (!temp)
            {
                SysPushErrorIO("No memory to allocate work unit");
                return false;
            }

            return this->pIOProcessor_->SubmitIOWorkItem(temp);
        }

    private:
        AuThreadPrimitives::SpinLock spinLock_;
        AuSPtr<IIOProcessor> pIOProcessor_;
        NetSrvWorkers *pParent_;
        AuUInt8 workerIndex_;
        AuSPtr<AuLoop::ILSEvent> pEvent_;
        AuUInt32 dwAtomicEventCounter_ {};

    };
}