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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <atomic>
#include <condition_variable>
#include <cstddef>
#include <memory>
#include <mutex>
#include "common/common_types.h"
namespace Kernel {
class Scheduler;
}
namespace Core {
class ARM_Interface;
class ExclusiveMonitor;
constexpr unsigned NUM_CPU_CORES{4};
class CpuBarrier {
public:
bool IsAlive() const {
return !end;
}
void NotifyEnd();
bool Rendezvous();
private:
unsigned cores_waiting{NUM_CPU_CORES};
std::mutex mutex;
std::condition_variable condition;
std::atomic<bool> end{};
};
class Cpu {
public:
Cpu(ExclusiveMonitor& exclusive_monitor, CpuBarrier& cpu_barrier, std::size_t core_index);
~Cpu();
void RunLoop(bool tight_loop = true);
void SingleStep();
void PrepareReschedule();
ARM_Interface& ArmInterface() {
return *arm_interface;
}
const ARM_Interface& ArmInterface() const {
return *arm_interface;
}
const std::shared_ptr<Kernel::Scheduler>& Scheduler() const {
return scheduler;
}
bool IsMainCore() const {
return core_index == 0;
}
std::size_t CoreIndex() const {
return core_index;
}
static std::unique_ptr<ExclusiveMonitor> MakeExclusiveMonitor(std::size_t num_cores);
private:
void Reschedule();
std::unique_ptr<ARM_Interface> arm_interface;
CpuBarrier& cpu_barrier;
std::shared_ptr<Kernel::Scheduler> scheduler;
std::atomic<bool> reschedule_pending = false;
std::size_t core_index;
};
} // namespace Core
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