Qt: Create MultiplayerController

src/platform/qt/GameController.cpp

@@ -7,6 +7,7 @@
 
 #include "AudioProcessor.h"
 #include "InputController.h"
+#include "MultiplayerController.h"
 
 #include <QDateTime>
 #include <QThread>
@@ -41,6 +42,7 @@ GameController::GameController(QObject* parent)
 	, m_turbo(false)
 	, m_turboForced(false)
 	, m_inputController(nullptr)
+	, m_multiplayer(nullptr)
 {
 	m_renderer = new GBAVideoSoftwareRenderer;
 	GBAVideoSoftwareRendererCreate(m_renderer);
@@ -140,12 +142,30 @@ GameController::~GameController() {
 	m_audioThread->quit();
 	m_audioThread->wait();
 	disconnect();
+	clearMultiplayerController();
 	closeGame();
 	GBACheatDeviceDestroy(&m_cheatDevice);
 	delete m_renderer;
 	delete[] m_drawContext;
 }
 
+void GameController::setMultiplayerController(std::shared_ptr<MultiplayerController> controller) {
+	if (controller == m_multiplayer) {
+		return;
+	}
+	clearMultiplayerController();
+	m_multiplayer = controller;
+	controller->attachGame(this);
+}
+
+void GameController::clearMultiplayerController() {
+	if (!m_multiplayer) {
+		return;
+	}
+	m_multiplayer->detachGame(this);
+	m_multiplayer.reset();
+}
+
 void GameController::setOverride(const GBACartridgeOverride& override) {
 	m_threadContext.override = override;
 	m_threadContext.hasOverride = true;

src/platform/qt/GameController.h

@@ -12,6 +12,8 @@
 #include <QMutex>
 #include <QString>
 
+#include <memory>
+
 extern "C" {
 #include "gba/cheats.h"
 #include "gba/hardware.h"
@@ -32,6 +34,7 @@ namespace QGBA {
 
 class AudioProcessor;
 class InputController;
+class MultiplayerController;
 
 class GameController : public QObject {
 Q_OBJECT
@@ -59,6 +62,9 @@ public:
 	void setInputController(InputController* controller) { m_inputController = controller; }
 	void setOverrides(Configuration* overrides) { m_threadContext.overrides = overrides; }
 
+	void setMultiplayerController(std::shared_ptr<MultiplayerController> controller);
+	void clearMultiplayerController();
+
 	void setOverride(const GBACartridgeOverride& override);
 	void clearOverride() { m_threadContext.hasOverride = false; }
 
@@ -162,6 +168,7 @@ private:
 	bool m_turboForced;
 
 	InputController* m_inputController;
+	std::shared_ptr<MultiplayerController> m_multiplayer;
 
 	struct GameControllerLux : GBALuminanceSource {
 		GameController* p;

src/platform/qt/MultiplayerController.cpp

@@ -5,6 +5,8 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "MultiplayerController.h"
 
+#include "GameController.h"
+
 using namespace QGBA;
 
 MultiplayerController::MultiplayerController() {
@@ -16,5 +18,46 @@ MultiplayerController::~MultiplayerController() {
 }
 
 bool MultiplayerController::attachGame(GameController* controller) {
-	return false;
+	MutexLock(&m_lockstep.mutex);
+	if (m_lockstep.attached == MAX_GBAS) {
+		MutexUnlock(&m_lockstep.mutex);
+		return false;
+	}
+	GBASIOLockstepNode* node = new GBASIOLockstepNode;
+	GBASIOLockstepNodeCreate(node);
+	GBASIOLockstepAttachNode(&m_lockstep, node);
+	MutexUnlock(&m_lockstep.mutex);
+
+	controller->threadInterrupt();
+	GBAThread* thread = controller->thread();
+	if (controller->isLoaded()) {
+		GBASIOSetDriver(&thread->gba->sio, &node->d, SIO_MULTI);
+	}
+	thread->sioDrivers.multiplayer = &node->d;
+	controller->threadContinue();
+	return true;
+}
+
+void MultiplayerController::detachGame(GameController* controller) {
+	controller->threadInterrupt();
+	MutexLock(&m_lockstep.mutex);
+	GBAThread* thread = nullptr;
+	for (int i = 0; i < m_lockstep.attached; ++i) {
+		thread = controller->thread();
+		if (thread->sioDrivers.multiplayer == &m_lockstep.players[i]->d) {
+			break;
+		}
+		thread = nullptr;
+	}
+	if (thread) {
+		GBASIOLockstepNode* node = reinterpret_cast<GBASIOLockstepNode*>(thread->sioDrivers.multiplayer);
+		if (controller->isLoaded()) {
+			GBASIOSetDriver(&thread->gba->sio, nullptr, SIO_MULTI);
+		}
+		thread->sioDrivers.multiplayer = nullptr;
+		GBASIOLockstepDetachNode(&m_lockstep, node);
+		delete node;
+	}
+	MutexUnlock(&m_lockstep.mutex);
+	controller->threadContinue();
 }

src/platform/qt/MultiplayerController.h

@@ -20,6 +20,7 @@ public:
 	~MultiplayerController();
 
 	bool attachGame(GameController*);
+	void detachGame(GameController*);
 
 private:
 	GBASIOLockstep m_lockstep;