mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-09-19 22:59:00 +00:00
73 lines
2.7 KiB
C++
73 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <mesosphere/kern_select_cpu.hpp>
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#include <mesosphere/kern_k_thread.hpp>
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#include <mesosphere/kern_k_priority_queue.hpp>
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#include <mesosphere/kern_k_scheduler_lock.hpp>
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namespace ams::kern {
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using KSchedulerPriorityQueue = KPriorityQueue<KThread, cpu::NumCores, ams::svc::LowestThreadPriority, ams::svc::HighestThreadPriority>;
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static_assert(std::is_same<KSchedulerPriorityQueue::AffinityMaskType, KAffinityMask>::value);
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static_assert(KSchedulerPriorityQueue::NumCores == cpu::NumCores);
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static_assert(KSchedulerPriorityQueue::NumPriority == BITSIZEOF(u64));
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class KScopedSchedulerLock;
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class KScheduler {
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NON_COPYABLE(KScheduler);
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NON_MOVEABLE(KScheduler);
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public:
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using LockType = KAbstractSchedulerLock<KScheduler>;
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struct SchedulingState {
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std::atomic<bool> needs_scheduling;
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bool interrupt_task_thread_runnable;
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bool should_count_idle;
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u64 idle_count;
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KThread *highest_priority_thread;
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void *idle_thread_stack;
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};
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private:
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friend class KScopedSchedulerLock;
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static inline LockType s_scheduler_lock;
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private:
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SchedulingState state;
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bool is_active;
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s32 core_id;
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KThread *prev_thread;
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u64 last_context_switch_time;
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KThread *idle_thread;
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public:
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KScheduler();
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/* TODO: Actually implement KScheduler. This is a placeholder. */
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public:
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/* API used by KSchedulerLock */
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static void DisableScheduling();
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static void EnableScheduling();
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static u64 UpdateHighestPriorityThreads();
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static void EnableSchedulingAndSchedule(u64 cores_needing_scheduling);
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};
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class KScopedSchedulerLock {
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public:
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ALWAYS_INLINE KScopedSchedulerLock() { KScheduler::s_scheduler_lock.Lock(); }
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ALWAYS_INLINE ~KScopedSchedulerLock() { KScheduler::s_scheduler_lock.Unlock(); }
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};
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}
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