/*
 * Copyright (c) 2020-2021 ndeadly
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include "mcmitm_utils.hpp"

namespace ams::mitm::utils {

    namespace {

        constexpr inline s32 TargetThreadPriorityRangeSize = svc::LowestThreadPriority - svc::HighestThreadPriority + 1;
        constexpr inline s32 UserThreadPriorityOffset = 28;
        constexpr inline s32 HighestTargetThreadPriority = 0;
        constexpr inline s32 LowestTargetThreadPriority = TargetThreadPriorityRangeSize - 1;

    }

    s32 ConvertToHorizonPriority(s32 user_priority) {
        const s32 horizon_priority = user_priority + UserThreadPriorityOffset;
        AMS_ASSERT(HighestTargetThreadPriority <= horizon_priority && horizon_priority <= LowestTargetThreadPriority);
        return horizon_priority;
    }

    s32 ConvertToUserPriority(s32 horizon_priority) {
        AMS_ASSERT(HighestTargetThreadPriority <= horizon_priority && horizon_priority <= LowestTargetThreadPriority);
        return horizon_priority - UserThreadPriorityOffset;
    }

}