Atmosphere/libraries/libmesosphere/include/mesosphere/kern_k_scheduler.hpp

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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* 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/>.
*/
#pragma once
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#include <mesosphere/kern_select_cpu.hpp>
#include <mesosphere/kern_k_thread.hpp>
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#include <mesosphere/kern_k_priority_queue.hpp>
namespace ams::kern {
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using KSchedulerPriorityQueue = KPriorityQueue<KThread, cpu::NumCores, ams::svc::LowestThreadPriority, ams::svc::HighestThreadPriority>;
static_assert(std::is_same<KSchedulerPriorityQueue::AffinityMaskType, KAffinityMask>::value);
static_assert(KSchedulerPriorityQueue::NumCores == cpu::NumCores);
static_assert(KSchedulerPriorityQueue::NumPriority == BITSIZEOF(u64));
class KScheduler {
NON_COPYABLE(KScheduler);
NON_MOVEABLE(KScheduler);
public:
struct SchedulingState {
std::atomic<bool> needs_scheduling;
bool interrupt_task_thread_runnable;
bool should_count_idle;
u64 idle_count;
KThread *highest_priority_thread;
void *idle_thread_stack;
};
private:
SchedulingState state;
bool is_active;
s32 core_id;
KThread *prev_thread;
u64 last_context_switch_time;
KThread *idle_thread;
public:
KScheduler();
/* TODO: Actually implement KScheduler. This is a placeholder. */
};
}