core: Make is_powered_on atomic

Fixes potential data races when shutting down.

src/core/core.cpp

@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <array>
+#include <atomic>
 #include <memory>
 #include <utility>
 
@@ -377,7 +378,7 @@ struct System::Impl {
     std::unique_ptr<Core::DeviceMemory> device_memory;
     Core::Memory::Memory memory;
     CpuManager cpu_manager;
-    bool is_powered_on = false;
+    std::atomic_bool is_powered_on{};
     bool exit_lock = false;
 
     Reporter reporter;
@@ -463,7 +464,7 @@ System::ResultStatus System::Load(Frontend::EmuWindow& emu_window, const std::st
 }
 
 bool System::IsPoweredOn() const {
-    return impl->is_powered_on;
+    return impl->is_powered_on.load(std::memory_order::relaxed);
 }
 
 void System::PrepareReschedule() {

src/input_common/mouse/mouse_input.cpp

@@ -2,23 +2,25 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
-#include <stop_token>
-#include <thread>
-
 #include "common/settings.h"
 #include "input_common/mouse/mouse_input.h"
 
 namespace MouseInput {
 
 Mouse::Mouse() {
-    update_thread = std::jthread([this](std::stop_token stop_token) { UpdateThread(stop_token); });
+    update_thread = std::thread(&Mouse::UpdateThread, this);
 }
 
-Mouse::~Mouse() = default;
+Mouse::~Mouse() {
+    update_thread_running = false;
+    if (update_thread.joinable()) {
+        update_thread.join();
+    }
+}
 
-void Mouse::UpdateThread(std::stop_token stop_token) {
+void Mouse::UpdateThread() {
     constexpr int update_time = 10;
-    while (!stop_token.stop_requested()) {
+    while (update_thread_running) {
         for (MouseInfo& info : mouse_info) {
             const Common::Vec3f angular_direction{
                 -info.tilt_direction.y,

src/input_common/mouse/mouse_input.h

@@ -6,7 +6,6 @@
 
 #include <array>
 #include <mutex>
-#include <stop_token>
 #include <thread>
 
 #include "common/common_types.h"
@@ -86,7 +85,7 @@ public:
     [[nodiscard]] const MouseData& GetMouseState(std::size_t button) const;
 
 private:
-    void UpdateThread(std::stop_token stop_token);
+    void UpdateThread();
     void UpdateYuzuSettings();
     void StopPanning();
 
@@ -106,11 +105,12 @@ private:
     u16 buttons{};
     u16 toggle_buttons{};
     u16 lock_buttons{};
-    std::jthread update_thread;
+    std::thread update_thread;
     MouseButton last_button{MouseButton::Undefined};
     std::array<MouseInfo, 7> mouse_info;
     Common::SPSCQueue<MouseStatus> mouse_queue;
     bool configuring{false};
+    bool update_thread_running{true};
     int mouse_panning_timout{};
 };
 } // namespace MouseInput