[video_core, hle] remove redundant parent references in system structs (#3908)

reworked a bit to remove references of parent objects and instead pass as arguments to methods to prevent useless reloads

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Co-authored-by: maufeat <sahyno1996@gmail.com>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3908
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: crueter <crueter@eden-emu.dev>

10 files changed, 88 insertions, 90 deletions

diff --git a/src/audio_core/audio_core.cpp b/src/audio_core/audio_core.cpp
index fcaab2b320..234c831ac0 100644
--- a/src/audio_core/audio_core.cpp
+++ b/src/audio_core/audio_core.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -8,10 +11,11 @@
 
 namespace AudioCore {
 
-AudioCore::AudioCore(Core::System& system) : audio_manager{std::make_unique<AudioManager>()} {
+AudioCore::AudioCore(Core::System& system) {
+    audio_manager.emplace();
     CreateSinks();
     // Must be created after the sinks
-    adsp = std::make_unique<ADSP::ADSP>(system, *output_sink);
+    adsp.emplace(system, *output_sink);
 }
 
 AudioCore ::~AudioCore() {
diff --git a/src/audio_core/audio_core.h b/src/audio_core/audio_core.h
index e4e27fc661..ababd780b1 100644
--- a/src/audio_core/audio_core.h
+++ b/src/audio_core/audio_core.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -15,10 +18,7 @@ class System;
 
 namespace AudioCore {
 
-class AudioManager;
-/**
- * Main audio class, stored inside the core, and holding the audio manager, all sinks, and the ADSP.
- */
+/// @brief Main audio class, stored inside the core, and holding the audio manager, all sinks, and the ADSP.
 class AudioCore {
 public:
     explicit AudioCore(Core::System& system);
@@ -50,27 +50,22 @@ public:
      */
     Sink::Sink& GetInputSink();
 
-    /**
-     * Get the ADSP.
-     *
-     * @return Ref to the ADSP.
-     */
+    /// @brief Get the ADSP.
+    /// @return Ref to the ADSP.
     ADSP::ADSP& ADSP();
 
 private:
-    /**
-     * Create the sinks on startup.
-     */
+    /// @brief Create the sinks on startup.
     void CreateSinks();
 
     /// Main audio manager for audio in/out
-    std::unique_ptr<AudioManager> audio_manager;
+    std::optional<AudioManager> audio_manager;
     /// Sink used for audio renderer and audio out
     std::unique_ptr<Sink::Sink> output_sink;
     /// Sink used for audio input
     std::unique_ptr<Sink::Sink> input_sink;
     /// The ADSP in the sysmodule
-    std::unique_ptr<ADSP::ADSP> adsp;
+    std::optional<ADSP::ADSP> adsp;
 };
 
 } // namespace AudioCore
diff --git a/src/audio_core/audio_in_manager.cpp b/src/audio_core/audio_in_manager.cpp
index 63b064922a..6b528e9db0 100644
--- a/src/audio_core/audio_in_manager.cpp
+++ b/src/audio_core/audio_in_manager.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -41,8 +44,7 @@ void Manager::ReleaseSessionId(const size_t session_id) {
 Result Manager::LinkToManager() {
     std::scoped_lock l{mutex};
     if (!linked_to_manager) {
-        AudioManager& manager{system.AudioCore().GetAudioManager()};
-        manager.SetInManager(std::bind(&Manager::BufferReleaseAndRegister, this));
+        system.AudioCore().GetAudioManager().SetInManager(std::bind(&Manager::BufferReleaseAndRegister, this));
         linked_to_manager = true;
     }
 
diff --git a/src/audio_core/audio_manager.cpp b/src/audio_core/audio_manager.cpp
index 10b56f2140..93142a53fb 100644
--- a/src/audio_core/audio_manager.cpp
+++ b/src/audio_core/audio_manager.cpp
@@ -1,81 +1,77 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "audio_core/audio_manager.h"
+#include "common/thread.h"
 #include "core/core.h"
 #include "core/hle/service/audio/errors.h"
 
 namespace AudioCore {
 
 AudioManager::AudioManager() {
-    thread = std::jthread([this]() { ThreadFunc(); });
+    thread = std::jthread([this](std::stop_token stop_token) {
+        Common::SetCurrentThreadName("AudioManager");
+        std::unique_lock l{events.GetAudioEventLock()};
+        events.ClearEvents();
+        while (!stop_token.stop_requested()) {
+            const auto timed_out{events.Wait(l, std::chrono::seconds(2))};
+            if (events.CheckAudioEventSet(Event::Type::Max)) {
+                break;
+            }
+            for (size_t i = 0; i < buffer_events.size(); i++) {
+                const auto event_type = Event::Type(i);
+                if (events.CheckAudioEventSet(event_type) || timed_out) {
+                    if (buffer_events[i]) {
+                        buffer_events[i]();
+                    }
+                }
+                events.SetAudioEvent(event_type, false);
+            }
+        }
+    });
 }
 
 void AudioManager::Shutdown() {
-    running = false;
     events.SetAudioEvent(Event::Type::Max, true);
-    thread.join();
+    if (thread.joinable()) {
+        thread.request_stop();
+        thread.join();
+    }
 }
 
 Result AudioManager::SetOutManager(BufferEventFunc buffer_func) {
-    if (!running) {
-        return Service::Audio::ResultOperationFailed;
-    }
-
-    std::scoped_lock l{lock};
-
-    const auto index{events.GetManagerIndex(Event::Type::AudioOutManager)};
-    if (buffer_events[index] == nullptr) {
-        buffer_events[index] = std::move(buffer_func);
-        needs_update = true;
-        events.SetAudioEvent(Event::Type::AudioOutManager, true);
+    if (thread.joinable()) {
+        std::scoped_lock l{lock};
+        const auto index{events.GetManagerIndex(Event::Type::AudioOutManager)};
+        if (buffer_events[index] == nullptr) {
+            buffer_events[index] = std::move(buffer_func);
+            needs_update = true;
+            events.SetAudioEvent(Event::Type::AudioOutManager, true);
+        }
+        return ResultSuccess;
     }
-    return ResultSuccess;
+    return Service::Audio::ResultOperationFailed;
 }
 
 Result AudioManager::SetInManager(BufferEventFunc buffer_func) {
-    if (!running) {
-        return Service::Audio::ResultOperationFailed;
-    }
-
-    std::scoped_lock l{lock};
-
-    const auto index{events.GetManagerIndex(Event::Type::AudioInManager)};
-    if (buffer_events[index] == nullptr) {
-        buffer_events[index] = std::move(buffer_func);
-        needs_update = true;
-        events.SetAudioEvent(Event::Type::AudioInManager, true);
+    if (thread.joinable()) {
+        std::scoped_lock l{lock};
+        const auto index{events.GetManagerIndex(Event::Type::AudioInManager)};
+        if (buffer_events[index] == nullptr) {
+            buffer_events[index] = std::move(buffer_func);
+            needs_update = true;
+            events.SetAudioEvent(Event::Type::AudioInManager, true);
+        }
+        return ResultSuccess;
     }
-    return ResultSuccess;
+    return Service::Audio::ResultOperationFailed;
 }
 
 void AudioManager::SetEvent(const Event::Type type, const bool signalled) {
     events.SetAudioEvent(type, signalled);
 }
 
-void AudioManager::ThreadFunc() {
-    std::unique_lock l{events.GetAudioEventLock()};
-    events.ClearEvents();
-    running = true;
-
-    while (running) {
-        const auto timed_out{events.Wait(l, std::chrono::seconds(2))};
-
-        if (events.CheckAudioEventSet(Event::Type::Max)) {
-            break;
-        }
-
-        for (size_t i = 0; i < buffer_events.size(); i++) {
-            const auto event_type = static_cast<Event::Type>(i);
-
-            if (events.CheckAudioEventSet(event_type) || timed_out) {
-                if (buffer_events[i]) {
-                    buffer_events[i]();
-                }
-            }
-            events.SetAudioEvent(event_type, false);
-        }
-    }
-}
-
 } // namespace AudioCore
diff --git a/src/audio_core/audio_manager.h b/src/audio_core/audio_manager.h
index 02270242ac..0194aa16db 100644
--- a/src/audio_core/audio_manager.h
+++ b/src/audio_core/audio_manager.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -66,13 +69,6 @@ public:
     void SetEvent(Event::Type type, bool signalled);
 
 private:
-    /**
-     * Main thread, waiting on a manager signal and calling the registered function.
-     */
-    void ThreadFunc();
-
-    /// Is the main thread running?
-    std::atomic<bool> running{};
     /// Unused
     bool needs_update{};
     /// Events to be set and signalled
diff --git a/src/audio_core/audio_out_manager.cpp b/src/audio_core/audio_out_manager.cpp
index 316ea7c817..569df8d1e0 100644
--- a/src/audio_core/audio_out_manager.cpp
+++ b/src/audio_core/audio_out_manager.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -40,8 +43,7 @@ void Manager::ReleaseSessionId(const size_t session_id) {
 Result Manager::LinkToManager() {
     std::scoped_lock l{mutex};
     if (!linked_to_manager) {
-        AudioManager& manager{system.AudioCore().GetAudioManager()};
-        manager.SetOutManager(std::bind(&Manager::BufferReleaseAndRegister, this));
+        system.AudioCore().GetAudioManager().SetOutManager(std::bind(&Manager::BufferReleaseAndRegister, this));
         linked_to_manager = true;
     }
 
diff --git a/src/audio_core/device/device_session.cpp b/src/audio_core/device/device_session.cpp
index 2a1ae1bb3f..2e9da7876f 100644
--- a/src/audio_core/device/device_session.cpp
+++ b/src/audio_core/device/device_session.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -39,7 +42,7 @@ Result DeviceSession::Initialize(std::string_view name_, SampleFormat sample_for
     channel_count = channel_count_;
     session_id = session_id_;
     handle = handle_;
-    handle->Open();
+    handle->Open(system.Kernel());
     applet_resource_user_id = applet_resource_user_id_;
 
     if (type == Sink::StreamType::In) {
@@ -60,7 +63,7 @@ void DeviceSession::Finalize() {
     }
 
     if (handle) {
-        handle->Close();
+        handle->Close(system.Kernel());
         handle = nullptr;
     }
 }
diff --git a/src/audio_core/in/audio_in_system.cpp b/src/audio_core/in/audio_in_system.cpp
index ec1f565736..f71a2df6be 100644
--- a/src/audio_core/in/audio_in_system.cpp
+++ b/src/audio_core/in/audio_in_system.cpp
@@ -122,7 +122,7 @@ Result System::Stop() {
         session->SetVolume(0.0f);
         session->ClearBuffers();
         if (buffers.ReleaseBuffers(system.CoreTiming(), *session, true)) {
-            buffer_event->Signal();
+            buffer_event->Signal(system.Kernel());
         }
         state = State::Stopped;
     }
@@ -164,7 +164,7 @@ void System::ReleaseBuffers() {
 
     if (signal) {
         // Signal if any buffer was released, or if none are registered, we need more.
-        buffer_event->Signal();
+        buffer_event->Signal(system.Kernel());
     }
 }
 
@@ -181,7 +181,7 @@ bool System::FlushAudioInBuffers() {
     buffers.FlushBuffers(buffers_released);
 
     if (buffers_released > 0) {
-        buffer_event->Signal();
+        buffer_event->Signal(system.Kernel());
     }
     return true;
 }
diff --git a/src/audio_core/out/audio_out_system.cpp b/src/audio_core/out/audio_out_system.cpp
index dcb0d0694e..46f30f19c6 100644
--- a/src/audio_core/out/audio_out_system.cpp
+++ b/src/audio_core/out/audio_out_system.cpp
@@ -121,7 +121,7 @@ Result System::Stop() {
         session->SetVolume(0.0f);
         session->ClearBuffers();
         if (buffers.ReleaseBuffers(system.CoreTiming(), *session, true)) {
-            buffer_event->Signal();
+            buffer_event->Signal(system.Kernel());
         }
         state = State::Stopped;
     }
@@ -162,7 +162,7 @@ void System::ReleaseBuffers() {
     bool signal{buffers.ReleaseBuffers(system.CoreTiming(), *session, false)};
     if (signal) {
         // Signal if any buffer was released, or if none are registered, we need more.
-        buffer_event->Signal();
+        buffer_event->Signal(system.Kernel());
     }
 }
 
@@ -179,7 +179,7 @@ bool System::FlushAudioOutBuffers() {
     buffers.FlushBuffers(buffers_released);
 
     if (buffers_released > 0) {
-        buffer_event->Signal();
+        buffer_event->Signal(system.Kernel());
     }
     return true;
 }
diff --git a/src/audio_core/renderer/system.cpp b/src/audio_core/renderer/system.cpp
index 2053ec6dd4..b7675ff5de 100644
--- a/src/audio_core/renderer/system.cpp
+++ b/src/audio_core/renderer/system.cpp
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
@@ -540,7 +540,7 @@ Result System::Update(std::span<const u8> input, std::span<u8> performance, std:
         return result;
     }
 
-    adsp_rendered_event->Clear();
+    adsp_rendered_event->Clear(core.Kernel());
     num_times_updated++;
 
     const auto end_time{core.CoreTiming().GetGlobalTimeNs().count()};
@@ -624,7 +624,7 @@ void System::SendCommandToDsp() {
             reset_command_buffers = false;
             command_buffer_size = command_size;
             if (remaining_command_count == 0) {
-                adsp_rendered_event->Signal();
+                adsp_rendered_event->Signal(core.Kernel());
             }
         } else {
             audio_renderer.ClearRemainCommandCount(session_id);