/***
    Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.
    File: AuExit.Unix.cpp
    Date: 2022-4-7
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "AuExit.hpp"
#include "AuExit.Unix.hpp"
#include <Source/Grug/AuGrug.hpp>

namespace Aurora::Exit
{
    static void SendExitSignal(Grug::Arrow *)
    {
        PostLevel(AuThreads::GetThread(), Exit::ETriggerLevel::eSigTerminate);
    }

    static void SendExitNowSignal(Grug::Arrow *)
    {
        PostLevel(AuThreads::GetThread(), Exit::ETriggerLevel::eSigQuitNow);
    }

    static void HandleSigTerminate(int sig)
    {
        static Grug::Arrow arrow;

        if (sig == SIGINT)
        {
            Grug::HurlArrow(&arrow, {}, SendExitSignal);
        }
        else
        {
            Grug::HurlArrow(&arrow, SendExitNowSignal, {});
            Grug::ArrowWait(&arrow);
        }
    }

    void InitUnix()
    {
        struct sigaction action =
        {
            .sa_handler = HandleSigTerminate,
            .sa_flags = SA_ONSTACK
        };
        sigemptyset(&action.sa_mask);
        
        sigaction(SIGINT, &action, nullptr);
        sigaction(SIGTERM, &action, nullptr);
        sigaction(SIGTSTP, &action, nullptr);
    }

    void DeinitUnix()
    {
        struct sigaction action =
        {
            .sa_handler = SIG_DFL,
            .sa_flags = SA_ONSTACK
        };
        sigemptyset(&action.sa_mask);

        sigaction(SIGINT, &action, nullptr);
        sigaction(SIGTERM, &action, nullptr);
        sigaction(SIGTSTP, &action, nullptr);
    }
}