// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#pragma once

#include "common/assert.h"
#include "common/common_types.h"
#include "core/hle/kernel/k_condition_variable.h"
#include "core/hle/kernel/svc_types.h"

union Result;

namespace Core {
class System;
}

namespace Kernel {

class KernelCore;

class KAddressArbiter {
public:
    using ThreadTree = KConditionVariable::ThreadTree;

    explicit KAddressArbiter(Core::System& system);
    ~KAddressArbiter();

    Result SignalToAddress(uint64_t addr, Svc::SignalType type, s32 value, s32 count) {
        switch (type) {
        case Svc::SignalType::Signal:
            R_RETURN(this->Signal(addr, count));
        case Svc::SignalType::SignalAndIncrementIfEqual:
            R_RETURN(this->SignalAndIncrementIfEqual(addr, value, count));
        case Svc::SignalType::SignalAndModifyByWaitingCountIfEqual:
            R_RETURN(this->SignalAndModifyByWaitingCountIfEqual(addr, value, count));
        default:
            UNREACHABLE();
        }
    }

    Result WaitForAddress(uint64_t addr, Svc::ArbitrationType type, s32 value, s64 timeout) {
        switch (type) {
        case Svc::ArbitrationType::WaitIfLessThan:
            R_RETURN(WaitIfLessThan(addr, value, false, timeout));
        case Svc::ArbitrationType::DecrementAndWaitIfLessThan:
            R_RETURN(WaitIfLessThan(addr, value, true, timeout));
        case Svc::ArbitrationType::WaitIfEqual:
            R_RETURN(WaitIfEqual(addr, value, timeout));
        default:
            UNREACHABLE();
        }
    }

private:
    Result Signal(uint64_t addr, s32 count);
    Result SignalAndIncrementIfEqual(uint64_t addr, s32 value, s32 count);
    Result SignalAndModifyByWaitingCountIfEqual(uint64_t addr, s32 value, s32 count);
    Result WaitIfLessThan(uint64_t addr, s32 value, bool decrement, s64 timeout);
    Result WaitIfEqual(uint64_t addr, s32 value, s64 timeout);

private:
    ThreadTree m_tree;
    Core::System& m_system;
    KernelCore& m_kernel;
};

} // namespace Kernel