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// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <atomic>
#include <set>
#include <vector>
#include "common/common_types.h"
#include "core/hardware_properties.h"
#include "core/hle/kernel/k_priority_queue.h"
#include "core/hle/kernel/k_scheduler_lock.h"
#include "core/hle/kernel/k_thread.h"
#include "core/hle/kernel/svc_types.h"
namespace Kernel {
class KernelCore;
class SchedulerLock;
using KSchedulerPriorityQueue =
KPriorityQueue<KThread, Core::Hardware::NUM_CPU_CORES, Svc::LowestThreadPriority,
Svc::HighestThreadPriority>;
static constexpr s32 HighestCoreMigrationAllowedPriority = 2;
static_assert(Svc::LowestThreadPriority >= HighestCoreMigrationAllowedPriority);
static_assert(Svc::HighestThreadPriority <= HighestCoreMigrationAllowedPriority);
class GlobalSchedulerContext final {
friend class KScheduler;
public:
using LockType = KAbstractSchedulerLock<KScheduler>;
explicit GlobalSchedulerContext(KernelCore& kernel);
~GlobalSchedulerContext();
/// Adds a new thread to the scheduler
void AddThread(KThread* thread);
/// Removes a thread from the scheduler
void RemoveThread(KThread* thread);
/// Returns a list of all threads managed by the scheduler
/// This is only safe to iterate while holding the scheduler lock
[[nodiscard]] const std::vector<KThread*>& GetThreadList() const {
return m_thread_list;
}
/**
* Rotates the scheduling queues of threads at a preemption priority and then does
* some core rebalancing. Preemption priorities can be found in the array
* 'preemption_priorities'.
*
* @note This operation happens every 10ms.
*/
void PreemptThreads();
/// Returns true if the global scheduler lock is acquired
bool IsLocked() const;
void UnregisterDummyThreadForWakeup(KThread* thread);
void RegisterDummyThreadForWakeup(KThread* thread);
void WakeupWaitingDummyThreads();
[[nodiscard]] LockType& SchedulerLock() {
return m_scheduler_lock;
}
private:
friend class KScopedSchedulerLock;
friend class KScopedSchedulerLockAndSleep;
KernelCore& m_kernel;
std::atomic_bool m_scheduler_update_needed{};
KSchedulerPriorityQueue m_priority_queue;
LockType m_scheduler_lock;
/// Lists dummy threads pending wakeup on lock release
std::set<KThread*> m_woken_dummy_threads;
/// Lists all thread ids that aren't deleted/etc.
std::vector<KThread*> m_thread_list;
std::mutex m_global_list_guard;
};
} // namespace Kernel
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