/***
    Copyright (C) 2021-2024 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: AuCriticalSection.hpp
    Date: 2021-6-12
    Author: Reece
***/
#pragma once

#include "AuMutex.Generic.hpp"
#include "AuConditionMutex.Generic.hpp"
#include "ThreadCookie.hpp"

namespace Aurora::Threading::Primitives
{
#if (defined(AURORA_ARCH_X64) || defined(AURORA_ARCH_X86))
    #pragma pack(push)
    #pragma pack(4)
#endif

    struct CriticalSectionImpl final : IWaitable
    {
        CriticalSectionImpl();
        ~CriticalSectionImpl();

        bool HasOSHandle(AuMach &mach) override;
        bool HasLockImplementation() override;
        bool TryLock() override;
        void Lock() override;
        bool LockMS(AuUInt64 timeout) override;
        bool LockNS(AuUInt64 timeout) override;
        bool LockAbsMS(AuUInt64 timeout) override;
        bool LockAbsNS(AuUInt64 timeout) override;
        void Unlock() override;

    private:
    #if defined(_AURUNTIME_GENERICCM)
        GenericConditionMutex mutex_;
    #elif defined(AURORA_IS_LINUX_DERIVED)
        LinuxConditionMutex mutex_; // shave a few bytes
    #else
        MutexImpl mutex_;
    #endif
        ThreadCookie_t owner_;
        AuUInt32 count_;
    };

#if (defined(AURORA_ARCH_X64) || defined(AURORA_ARCH_X86))
    #pragma pack(pop)
#endif
}