Threading.

external/glslang

@@ -1 +1 @@
-Subproject commit 3ebb72cc7429f0ab8218104dc3687c659c0f364d
+Subproject commit 9c7fd1a33e5cecbe465e1cd70170167d5e40d398

qt/src/EmuApplication.cpp

@@ -26,6 +26,7 @@ EmuApplication::~EmuApplication()
 
 void EmuApplication::restartAudio()
 {
+    suspendThread();
     sound_driver.reset();
     core->sound_output_function = nullptr;
 
@@ -55,6 +56,8 @@ void EmuApplication::restartAudio()
         core->sound_output_function = [&](int16_t *data, int samples) {
             writeSamples(data, samples);
         };
+
+    unsuspendThread();
 }
 
 #ifdef SOUND_BUFFER_WINDOW
@@ -124,13 +127,14 @@ void EmuApplication::writeSamples(int16_t *data, int samples)
 
 void EmuApplication::startGame()
 {
+    suspendThread();
     if (!sound_driver)
         restartAudio();
 
     core->screen_output_function = [&](uint16_t *data, int width, int height, int stride_bytes, double frame_rate) {
         if (window->canvas)
         {
-            QMetaObject::invokeMethod(window.get(), "output", Qt::ConnectionType::QueuedConnection,
+            QMetaObject::invokeMethod(window.get(), "output", Qt::ConnectionType::DirectConnection,
                 Q_ARG(uint8_t *, (uint8_t *)data),
                 Q_ARG(int, width),
                 Q_ARG(int, height),
@@ -143,7 +147,12 @@ void EmuApplication::startGame()
     updateSettings();
     updateBindings();
 
-    startIdleLoop();
+    emu_thread->setMainLoop([&] {
+        mainLoop();
+    });
+
+    unsuspendThread();
+    unpause();
 }
 
 bool EmuApplication::isPaused()
@@ -151,21 +160,61 @@ bool EmuApplication::isPaused()
     return (pause_count != 0);
 }
 
+void EmuApplication::suspendThread()
+{
+    suspend_count++;
+
+    if (!emu_thread)
+        return;
+
+    if (suspend_count > 0)
+    {
+        printf("Suspend %d\n", suspend_count);
+        emu_thread->runOnThread([&] { emu_thread->setStatusBits(EmuThread::eSuspended); });
+        emu_thread->waitForStatusBit(EmuThread::eSuspended);
+    }
+}
+
+void EmuApplication::unsuspendThread()
+{
+    suspend_count--;
+    assert(suspend_count >= 0);
+
+    if (!emu_thread)
+        return;
+
+        printf("Un Suspend %d\n", suspend_count);
+
+    if (suspend_count == 0)
+    {
+        emu_thread->runOnThread([&] { emu_thread->unsetStatusBits(EmuThread::eSuspended); });
+        emu_thread->waitForStatusBitCleared(EmuThread::eSuspended);
+    }
+}
+
 void EmuApplication::pause()
 {
     pause_count++;
     if (pause_count > 0)
     {
+        if (emu_thread)
+            emu_thread->pause();
         core->setPaused(true);
         if (sound_driver)
             sound_driver->stop();
     }
 }
 
-void EmuApplication::stopIdleLoop()
+void EmuApplication::stopThread()
 {
-    idle_loop->stop();
-    pause_count = 0;
+    if (!emu_thread)
+        return;
+
+    emu_thread->setStatusBits(EmuThread::eQuit);
+    while (!emu_thread->isFinished())
+    {
+        std::this_thread::yield();
+    }
 }
 
 void EmuApplication::unpause()
@@ -179,47 +228,42 @@ void EmuApplication::unpause()
     core->setPaused(false);
     if (core->active && sound_driver)
         sound_driver->start();
+    if (emu_thread)
+        emu_thread->unpause();
 }
 
-void EmuApplication::startIdleLoop()
+void EmuApplication::startThread()
 {
-    if (!idle_loop)
+    if (!emu_thread)
     {
-        idle_loop = std::make_unique<QTimer>();
-        idle_loop->setTimerType(Qt::TimerType::PreciseTimer);
-        idle_loop->setInterval(0);
-        idle_loop->setSingleShot(false);
-        idle_loop->callOnTimeout([&]{ idleLoop(); });
-        pause_count = 0;
-    }
-
-    idle_loop->start();
-}
-
-void EmuApplication::idleLoop()
-{
-    if (core->active && pause_count == 0)
-    {
-        idle_loop->setInterval(0);
-        pollJoysticks();
-        bool muted = config->mute_audio || (config->mute_audio_during_alternate_speed && core->isAbnormalSpeed());
-        core->mute(muted);
-        core->mainLoop();
-    }
-    else
-    {
-        pollJoysticks();
-        idle_loop->setInterval(32);
+        emu_thread = std::make_unique<EmuThread>(QThread::currentThread());
+        emu_thread->start();
+        emu_thread->waitForStatusBit(EmuThread::ePaused);
+        emu_thread->moveToThread(emu_thread.get());
     }
 }
 
 bool EmuApplication::openFile(std::string filename)
 {
+    suspendThread();
     auto result = core->openFile(filename);
+    unsuspendThread();
 
     return result;
 }
 
+void EmuApplication::mainLoop()
+{
+    if (!core->active)
+    {
+        std::this_thread::yield();
+        return;
+    }
+
+    printf("Here\n");
+    core->mainLoop();
+}
+
 void EmuApplication::reportBinding(EmuBinding b, bool active)
 {
     if (binding_callback && active)
@@ -238,7 +282,7 @@ void EmuApplication::reportBinding(EmuBinding b, bool active)
         return;
     }
 
-    core->reportBinding(b, active);
+    emu_thread->runOnThread([&, b, active] { core->reportBinding(b, active); });
 }
 
 void EmuApplication::updateBindings()
@@ -273,7 +317,9 @@ void EmuApplication::updateBindings()
         }
     }
 
+    suspendThread();
     core->updateBindings(config.get());
+    unsuspendThread();
 }
 
 void EmuApplication::handleBinding(std::string name, bool pressed)
@@ -296,14 +342,18 @@ void EmuApplication::handleBinding(std::string name, bool pressed)
                 save_slot++;
                 if (save_slot > 999)
                     save_slot = 0;
+                emu_thread->runOnThread([&] {
                     core->setMessage("Current slot: " + std::to_string(save_slot));
+                });
             }
             else if (name == "DecreaseSlot")
             {
                 save_slot--;
                 if (save_slot < 0)
                     save_slot = 999;
+                emu_thread->runOnThread([&] {
                     core->setMessage("Current slot: " + std::to_string(save_slot));
+                });
             }
             else if (name == "SaveState")
             {
@@ -349,7 +399,9 @@ void EmuApplication::updateSettings()
             config->input_rate /= 4;
     }
 
+    emu_thread->runOnThread([&] {
         core->updateSettings(config.get());
+    });
 }
 
 void EmuApplication::pollJoysticks()
@@ -401,39 +453,63 @@ void EmuApplication::pollJoysticks()
     }
 }
 
+void EmuApplication::startInputTimer()
+{
+    poll_input_timer = std::make_unique<QTimer>();
+    poll_input_timer->setTimerType(Qt::TimerType::PreciseTimer);
+    poll_input_timer->setInterval(4);
+    poll_input_timer->setSingleShot(false);
+    poll_input_timer->callOnTimeout([&] { pollJoysticks(); });
+    poll_input_timer->start();
+}
+
 void EmuApplication::loadState(int slot)
 {
+    emu_thread->runOnThread([&] {
         core->loadState(slot);
+    });
 }
 
 void EmuApplication::loadState(std::string filename)
 {
+    emu_thread->runOnThread([&] {
         core->loadState(filename);
+    });
 }
 
 void EmuApplication::saveState(int slot)
 {
+    emu_thread->runOnThread([&] {
         core->saveState(slot);
+    });
 }
 
 void EmuApplication::saveState(std::string filename)
 {
+    emu_thread->runOnThread([&] {
         core->saveState(filename);
+    });
 }
 
 void EmuApplication::reset()
 {
+    emu_thread->runOnThread([&] {
         core->softReset();
+    });
 }
 
 void EmuApplication::powerCycle()
 {
+    emu_thread->runOnThread([&] {
         core->reset();
+    });
 }
 
 void EmuApplication::loadUndoState()
 {
+    emu_thread->runOnThread([&] {
         core->loadUndoState();
+    });
 }
 
 std::string EmuApplication::getStateFolder()
@@ -445,3 +521,109 @@ bool EmuApplication::isCoreActive()
 {
     return core->active;
 }
+
+void EmuThread::runOnThread(std::function<void()> func)
+{
+    if (QThread::currentThread() != this)
+    {
+        QMetaObject::invokeMethod(this, "runOnThread", Q_ARG(std::function<void()>, func));
+        return;
+    }
+
+    func();
+}
+
+EmuThread::EmuThread(QThread *main_thread_)
+    : main_thread(main_thread_), QThread()
+{
+    qRegisterMetaType<std::function<void()>>("std::function<void()>");
+}
+
+void EmuThread::setStatusBits(int new_status)
+{
+    std::unique_lock lock(status_mutex);
+    status |= new_status;
+    lock.unlock();
+    status_cond.notify_all();
+}
+
+void EmuThread::unsetStatusBits(int new_status)
+{
+    printf("Old: %08x, new: %08x\n", status, new_status);
+    std::unique_lock lock(status_mutex);
+    status &= ~new_status;
+    printf("Final: %08x\n", status);
+    lock.unlock();
+    status_cond.notify_all();
+}
+
+void EmuThread::waitForStatusBit(int new_status)
+{
+    if (status & new_status)
+        return;
+
+    while (1)
+    {
+        std::unique_lock lock(status_mutex);
+        status_cond.wait_for(lock, std::chrono::milliseconds(500));
+        if (status & new_status)
+            break;
+    }
+}
+
+void EmuThread::waitForStatusBitCleared(int new_status)
+{
+    if (!(status & new_status))
+        return;
+
+    while (1)
+    {
+        std::unique_lock lock(status_mutex);
+        status_cond.wait_for(lock, std::chrono::milliseconds(500));
+        if (!(status & new_status))
+            break;
+    }
+}
+
+void EmuThread::pause()
+{
+    runOnThread([&] { setStatusBits(ePaused); });
+    waitForStatusBit(ePaused);
+}
+
+void EmuThread::unpause()
+{
+    runOnThread([&] { unsetStatusBits(ePaused); });
+    waitForStatusBitCleared(ePaused);
+}
+
+void EmuThread::run()
+{
+    auto event_loop = new QEventLoop();
+
+    setStatusBits(ePaused);
+
+    while (1)
+    {
+        event_loop->processEvents();
+
+        if (status & eQuit)
+            break;
+
+        if (status & (ePaused | eSuspended))
+        {
+            std::this_thread::sleep_for(2ms);
+            printf("Paused: %08x\n", status);
+            continue;
+        }
+
+        printf("Loop\n");
+        if (main_loop)
+            main_loop();
+    }
+}
+
+void EmuThread::setMainLoop(std::function<void ()> loop)
+{
+    main_loop = loop;
+}

qt/src/EmuApplication.hpp

@@ -1,6 +1,7 @@
 #pragma once
 #include <QApplication>
 #include <QTimer>
+#include <QThread>
 
 #include "EmuMainWindow.hpp"
 #include "EmuConfig.hpp"
@@ -8,6 +9,39 @@
 #include "Snes9xController.hpp"
 #include "common/audio/s9x_sound_driver.hpp"
 
+struct EmuThread : public QThread
+{
+Q_OBJECT
+  public:
+    EmuThread(QThread *main_thread);
+    QThread *main_thread;
+    void run() override;
+    void waitForStatusBit(int);
+    void waitForStatusBitCleared(int);
+    void setStatusBits(int);
+    void unsetStatusBits(int);
+    void pause();
+    void unpause();
+    void setMainLoop(std::function<void()> loop);
+
+    std::function<void()> main_loop = nullptr;
+
+    enum StatusBits
+    {
+        eDead       = 0,
+        ePaused     = 1,
+        eSuspended  = 2,
+        eRunning    = 4,
+        eQuit       = 8
+    };
+
+    int status = eDead;
+    std::mutex status_mutex;
+    std::condition_variable status_cond;
+
+  public slots:
+    void runOnThread(std::function<void()> func);
+};
 
 struct EmuApplication
 {
@@ -16,6 +50,7 @@ struct EmuApplication
     std::unique_ptr<SDLInputManager> input_manager;
     std::unique_ptr<EmuMainWindow> window;
     std::unique_ptr<S9xSoundDriver> sound_driver;
+    std::unique_ptr<EmuThread> emu_thread;
     Snes9xController *core;
 
     EmuApplication();
@@ -26,12 +61,16 @@ struct EmuApplication
     void updateBindings();
     bool isBound(EmuBinding b);
     void reportBinding(EmuBinding b, bool active);
+    void startInputTimer();
     void pollJoysticks();
     void restartAudio();
     void writeSamples(int16_t *data, int samples);
+    void mainLoop();
     void pause();
     void reset();
     void powerCycle();
+    void suspendThread();
+    void unsuspendThread();
     bool isPaused();
     void unpause();
     void loadState(int slot);
@@ -41,9 +80,8 @@ struct EmuApplication
     std::string getStateFolder();
     void loadUndoState();
     void startGame();
-    void startIdleLoop();
-    void stopIdleLoop();
-    void idleLoop();
+    void startThread();
+    void stopThread();
     bool isCoreActive();
 
     enum Handler
@@ -52,9 +90,10 @@ struct EmuApplication
         UI   = 1
     };
     std::map<uint32_t, std::pair<std::string, Handler>> bindings;
-    std::unique_ptr<QTimer> idle_loop;
+    std::unique_ptr<QTimer> poll_input_timer;
     std::function<void(EmuBinding)> binding_callback = nullptr;
     std::function<void()> joypads_changed_callback = nullptr;
     int save_slot = 0;
     int pause_count = 0;
+    int suspend_count = 0;
 };

qt/src/EmuCanvas.hpp

@@ -14,6 +14,7 @@ class EmuCanvas : public QWidget
     virtual void draw() = 0;
     void output(uint8_t *buffer, int width, int height, QImage::Format format, int bytes_per_line, double frame_rate);
     void throttle();
+    void resizeEvent(QResizeEvent *event) override = 0;
 
     virtual std::vector<std::string> getDeviceList()
     {

qt/src/EmuCanvasQt.cpp

@@ -45,3 +45,8 @@ void EmuCanvasQt::paintEvent(QPaintEvent *event)
 
     paint.drawImage(dest, image, QRect(0, 0, output_data.width, output_data.height));
 }
+
+void EmuCanvasQt::resizeEvent(QResizeEvent *event)
+{
+    QWidget::resizeEvent(event);
+}

qt/src/EmuCanvasQt.hpp

@@ -15,6 +15,7 @@ class EmuCanvasQt : public EmuCanvas
     virtual void draw() override;
 
     void paintEvent(QPaintEvent *event) override;
+    void resizeEvent(QResizeEvent *event) override;
 };
 
 #endif

qt/src/EmuMainWindow.cpp

@@ -109,8 +109,10 @@ void EmuMainWindow::createCanvas()
 
 void EmuMainWindow::recreateCanvas()
 {
+    app->suspendThread();
     destroyCanvas();
     createCanvas();
+    app->unsuspendThread();
 }
 
 void EmuMainWindow::setCoreActionsEnabled(bool enable)
@@ -528,6 +530,15 @@ void EmuMainWindow::toggleFullscreen()
 
 bool EmuMainWindow::eventFilter(QObject *watched, QEvent *event)
 {
+    if (watched == canvas && event->type() == QEvent::Resize)
+    {
+        app->suspendThread();
+        canvas->resizeEvent((QResizeEvent *)event);
+        event->accept();
+        app->unsuspendThread();
+        return true;
+    }
+
     if (event->type() != QEvent::KeyPress && event->type() != QEvent::KeyRelease)
         return false;
 

qt/src/main.cpp

@@ -26,12 +26,11 @@ int main(int argc, char *argv[])
     emu.window->show();
 
     emu.updateBindings();
-    emu.startIdleLoop();
-
-
-
+    emu.startInputTimer();
+    emu.startThread();
     emu.qtapp->exec();
 
+    emu.stopThread();
     emu.config->saveFile(EmuConfig::findConfigFile());
 
     return 0;