2e7802ad7d
Another thread may write to this variable while the core in question is in the middle of checking for a reschedule request.
86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
// Copyright 2018 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <atomic>
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#include <condition_variable>
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#include <memory>
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#include <mutex>
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#include <string>
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#include "common/common_types.h"
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#include "core/arm/exclusive_monitor.h"
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class ARM_Interface;
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namespace Kernel {
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class Scheduler;
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}
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namespace Core {
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constexpr unsigned NUM_CPU_CORES{4};
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class CpuBarrier {
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public:
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bool IsAlive() const {
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return !end;
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}
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void NotifyEnd();
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bool Rendezvous();
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private:
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unsigned cores_waiting{NUM_CPU_CORES};
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std::mutex mutex;
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std::condition_variable condition;
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std::atomic<bool> end{};
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};
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class Cpu {
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public:
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Cpu(std::shared_ptr<ExclusiveMonitor> exclusive_monitor,
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std::shared_ptr<CpuBarrier> cpu_barrier, size_t core_index);
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void RunLoop(bool tight_loop = true);
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void SingleStep();
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void PrepareReschedule();
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ARM_Interface& ArmInterface() {
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return *arm_interface;
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}
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const ARM_Interface& ArmInterface() const {
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return *arm_interface;
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}
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const std::shared_ptr<Kernel::Scheduler>& Scheduler() const {
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return scheduler;
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}
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bool IsMainCore() const {
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return core_index == 0;
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}
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size_t CoreIndex() const {
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return core_index;
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}
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static std::shared_ptr<ExclusiveMonitor> MakeExclusiveMonitor(size_t num_cores);
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private:
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void Reschedule();
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std::shared_ptr<ARM_Interface> arm_interface;
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std::shared_ptr<CpuBarrier> cpu_barrier;
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std::shared_ptr<Kernel::Scheduler> scheduler;
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std::atomic<bool> reschedule_pending = false;
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size_t core_index;
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};
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} // namespace Core
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