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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
#include <optional>
#include <QThread>
#include "common/common_types.h"
#include "common/logging.h"
#include "common/thread.h"
namespace Core {
class System;
} // namespace Core
namespace VideoCore {
enum class LoadCallbackStage;
} // namespace VideoCore
class EmuThread final : public QThread {
Q_OBJECT
public:
explicit EmuThread();
~EmuThread() override;
/**
* Start emulation (on new thread)
* @warning Only call when not running!
*/
void run() override;
/**
* Sets whether the emulation thread should run or not
* @param should_run Boolean value, set the emulation thread to running if true
*/
void SetRunning(bool should_run) {
// TODO: Prevent other threads from modifying the state until we finish.
{
// Notify the running thread to change state.
std::unique_lock run_lk{m_should_run_mutex};
m_should_run = should_run;
m_should_run_cv.notify_one();
}
// Wait until paused, if pausing.
if (!should_run) {
m_stopped.Wait();
}
}
/**
* Check if the emulation thread is running or not
* @return True if the emulation thread is running, otherwise false
*/
bool IsRunning() const {
return m_should_run;
}
/**
* Requests for the emulation thread to immediately stop running
*/
void ForceStop() {
LOG_WARNING(Frontend, "Force stopping EmuThread");
m_stop_source.request_stop();
}
/**
* Requests that the disk shader cache be reloaded for a different title.
*/
void RequestDiskShaderCacheReload(u64 program_id) {
std::unique_lock run_lk{m_should_run_mutex};
m_pending_shader_cache_title = program_id;
m_should_run_cv.notify_one();
}
private:
void EmulationPaused(std::unique_lock<std::mutex>& lk);
void EmulationResumed(std::unique_lock<std::mutex>& lk);
void ReloadDiskShaderCache(u64 program_id);
private:
std::stop_source m_stop_source;
std::mutex m_should_run_mutex;
std::condition_variable_any m_should_run_cv;
Common::Event m_stopped;
bool m_should_run{true};
std::optional<u64> m_pending_shader_cache_title;
signals:
/**
* Emitted when the CPU has halted execution
*
* @warning When connecting to this signal from other threads, make sure to specify either
* Qt::QueuedConnection (invoke slot within the destination object's message thread) or even
* Qt::BlockingQueuedConnection (additionally block source thread until slot returns)
*/
void DebugModeEntered();
/**
* Emitted right before the CPU continues execution
*
* @warning When connecting to this signal from other threads, make sure to specify either
* Qt::QueuedConnection (invoke slot within the destination object's message thread) or even
* Qt::BlockingQueuedConnection (additionally block source thread until slot returns)
*/
void DebugModeLeft();
void LoadProgress(VideoCore::LoadCallbackStage stage, std::size_t value, std::size_t total);
void ShaderCacheReloadStarted();
void ShaderCacheReloadFinished();
};
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