/***
    Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: AuSpawnThread.Unix.cpp
    Date: 
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "AuThreads.hpp"
#include "AuSpawnThread.hpp"

#if defined(AURORA_HAS_PTHREADS)
    #include <sched.h>
#endif

namespace Aurora::Threading::Threads
{
    AuPair<bool, AuUInt> /*success, oshandle*/ SpawnThread(const AuFunction<void()> &entrypoint, const AuString &debugString, AuUInt32 staskSize)
    {
        pthread_attr_t tattr;
        pthread_t handle;
		
        if (!entrypoint)
        {
            return {false, 0};
        }

        // i dont like this allocate
        auto callbackClone = _new AuFunction<void()>(entrypoint);
        if (!callbackClone)
        {
            return {false, 0};
        }

        static auto OSEP_f = [](void *that) -> void *
        {
            auto handle = reinterpret_cast<AuFunction<void()> *>(that);
            auto callMe = *handle;
            delete handle;
            callMe();
            return nullptr;
        };

        auto ret = pthread_attr_init(&tattr);
        if (ret != 0)
        {
            SysPushErrorGen("Couldn't create thread: {}", debugString);
            return {false, 0};
        }

        if (staskSize)
        {
            ret = pthread_attr_setstacksize(&tattr, AuMax(AuUInt32(PTHREAD_STACK_MIN), AuUInt32(staskSize)));
            if (ret != 0)
            {
                SysPushErrorGen("Couldn't create thread: {}", debugString);
                return {false, 0};
            }
        }

        ret = pthread_create(&handle, &tattr, OSEP_f, callbackClone);
        if (ret != 0)
        {
            SysPushErrorGen("Couldn't create thread: {}", debugString);
            return {false, 0};
        }

        return {true, handle};
    }
}