/***
    Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: TLSView.hpp
    Date: 2021-6-9
    Author: Reece
***/
#pragma once

namespace Aurora::Threading::Threads
{
    static const AuUInt64 kTlsKeyFollowsConvention       = AuUInt64(1) << AuUInt64(64 - 1);
    static const AuUInt64 kTlsKeyStaticPointerHandle     = AuUInt64(1) << AuUInt64(63 - 1);
    static const AuUInt64 kTlsKeyResettablePointerHandle = AuUInt64(1) << AuUInt64(62 - 1);
    static const AuUInt64 kTlsKeyMask                    = kTlsKeyResettablePointerHandle | kTlsKeyStaticPointerHandle | kTlsKeyFollowsConvention;

    class TLSView
    {
    public:
        using TlsCb = AuFunction<void(void *)>;

        virtual void  Remove(AuUInt64 key) = 0;
        virtual void *GetTLS(AuUInt64 key, AuMach length, bool noAutoCreate = false) = 0;
        virtual void *InitTLS(AuUInt64 key, AuMach length, const TlsCb &init, const TlsCb &deinit) = 0;

        void *GetOrSetup(AuUInt64 key, AuMach length, const TlsCb &init, const TlsCb &deinit)
        {
            void *tls;
        #if 0
            if (!(tls = GetTLS(key, length, true)))
        #endif
            {
                tls = InitTLS(key, length, init, deinit);
                if (!tls)
                {
                    return nullptr;
                }
            }
            return tls;
        }
    };
}