ControllerInterface: replace Reinitialize with RefreshDevices

The SDL backend crashes when you close a joystick after SDL_Quit has
been called. Some backends don't need to be shutdown and
re-initialized everytime, we can just ask to enumerate devices again.

Source/Core/DolphinWX/Input/InputConfigDiag.cpp

@@ -894,7 +894,7 @@ void InputConfigDialog::RefreshDevices(wxCommandEvent&)
   bool was_unpaused = Core::PauseAndLock(true);
 
   // refresh devices
-  g_controller_interface.Reinitialize();
+  g_controller_interface.RefreshDevices();
 
   // update all control references
   UpdateControlReferences();

Source/Core/InputCommon/ControllerInterface/Android/Android.cpp

@@ -10,7 +10,7 @@ namespace ciface
 {
 namespace Android
 {
-void Init()
+void PopulateDevices()
 {
   for (int i = 0; i < 8; ++i)
     g_controller_interface.AddDevice(std::make_shared<Touchscreen>(i));

Source/Core/InputCommon/ControllerInterface/Android/Android.h

@@ -11,7 +11,7 @@ namespace ciface
 {
 namespace Android
 {
-void Init();
+void PopulateDevices();
 class Touchscreen : public Core::Device
 {
 private:

Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp

@@ -55,41 +55,70 @@ void ControllerInterface::Initialize(void* const hwnd)
   m_hwnd = hwnd;
 
 #ifdef CIFACE_USE_DINPUT
-  ciface::DInput::Init((HWND)hwnd);
+// nothing needed
 #endif
 #ifdef CIFACE_USE_XINPUT
   ciface::XInput::Init();
 #endif
 #ifdef CIFACE_USE_XLIB
-  ciface::XInput2::Init(hwnd);
+// nothing needed
 #endif
 #ifdef CIFACE_USE_OSX
   ciface::OSX::Init(hwnd);
-  ciface::Quartz::Init(hwnd);
+// nothing needed for Quartz
 #endif
 #ifdef CIFACE_USE_SDL
   ciface::SDL::Init();
 #endif
 #ifdef CIFACE_USE_ANDROID
-  ciface::Android::Init();
+// nothing needed
 #endif
 #ifdef CIFACE_USE_EVDEV
   ciface::evdev::Init();
 #endif
 #ifdef CIFACE_USE_PIPES
-  ciface::Pipes::Init();
+// nothing needed
 #endif
 
   m_is_init = true;
+  RefreshDevices();
 }
 
-void ControllerInterface::Reinitialize()
+void ControllerInterface::RefreshDevices()
 {
   if (!m_is_init)
     return;
 
-  Shutdown();
-  Initialize(m_hwnd);
+  {
+    std::lock_guard<std::mutex> lk(m_devices_mutex);
+    m_devices.clear();
+  }
+
+#ifdef CIFACE_USE_DINPUT
+  ciface::DInput::PopulateDevices(reinterpret_cast<HWND>(m_hwnd));
+#endif
+#ifdef CIFACE_USE_XINPUT
+  ciface::XInput::PopulateDevices();
+#endif
+#ifdef CIFACE_USE_XLIB
+  ciface::XInput2::PopulateDevices(m_hwnd);
+#endif
+#ifdef CIFACE_USE_OSX
+  ciface::OSX::PopulateDevices(m_hwnd);
+  ciface::Quartz::PopulateDevices(m_hwnd);
+#endif
+#ifdef CIFACE_USE_SDL
+  ciface::SDL::PopulateDevices();
+#endif
+#ifdef CIFACE_USE_ANDROID
+  ciface::Android::PopulateDevices();
+#endif
+#ifdef CIFACE_USE_EVDEV
+  ciface::evdev::PopulateDevices();
+#endif
+#ifdef CIFACE_USE_PIPES
+  ciface::Pipes::PopulateDevices();
+#endif
 }
 
 //

Source/Core/InputCommon/ControllerInterface/ControllerInterface.h

@@ -116,7 +116,7 @@ public:
 
   ControllerInterface() : m_is_init(false), m_hwnd(nullptr) {}
   void Initialize(void* const hwnd);
-  void Reinitialize();
+  void RefreshDevices();
   void Shutdown();
   void AddDevice(std::shared_ptr<ciface::Core::Device> device);
   void RemoveDevice(std::function<bool(const ciface::Core::Device*)> callback);

Source/Core/InputCommon/ControllerInterface/DInput/DInput.cpp

@@ -44,7 +44,7 @@ std::string GetDeviceName(const LPDIRECTINPUTDEVICE8 device)
   return result;
 }
 
-void Init(HWND hwnd)
+void PopulateDevices(HWND hwnd)
 {
   IDirectInput8* idi8;
   if (FAILED(DirectInput8Create(GetModuleHandle(nullptr), DIRECTINPUT_VERSION, IID_IDirectInput8,

Source/Core/InputCommon/ControllerInterface/DInput/DInput.h

@@ -20,6 +20,6 @@ BOOL CALLBACK DIEnumDeviceObjectsCallback(LPCDIDEVICEOBJECTINSTANCE lpddoi, LPVO
 BOOL CALLBACK DIEnumDevicesCallback(LPCDIDEVICEINSTANCE lpddi, LPVOID pvRef);
 std::string GetDeviceName(const LPDIRECTINPUTDEVICE8 device);
 
-void Init(HWND hwnd);
+void PopulateDevices(HWND hwnd);
 }
 }

Source/Core/InputCommon/ControllerInterface/OSX/OSX.h

@@ -9,6 +9,7 @@ namespace ciface
 namespace OSX
 {
 void Init(void* window);
+void PopulateDevices(void* window);
 void DeInit();
 
 void DeviceElementDebugPrint(const void*, void*);

Source/Core/InputCommon/ControllerInterface/OSX/OSX.mm

@@ -182,6 +182,12 @@ void Init(void* window)
   IOHIDManagerUnscheduleFromRunLoop(HIDManager, CFRunLoopGetCurrent(), OurRunLoop);
 }
 
+void PopulateDevices(void* window)
+{
+  DeInit();
+  Init(window);
+}
+
 void DeInit()
 {
   // This closes all devices as well

Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.cpp

@@ -41,7 +41,7 @@ static double StringToDouble(const std::string& text)
   return result;
 }
 
-void Init()
+void PopulateDevices()
 {
   // Search the Pipes directory for files that we can open in read-only,
   // non-blocking mode. The device name is the virtual name of the file.

Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.h

@@ -22,7 +22,7 @@ namespace Pipes
 // SET {L, R} [0, 1]
 // SET {MAIN, C} [0, 1] [0, 1]
 
-void Init();
+void PopulateDevices();
 
 class PipeDevice : public Core::Device
 {

Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.h

@@ -8,7 +8,7 @@ namespace ciface
 {
 namespace Quartz
 {
-void Init(void* window);
+void PopulateDevices(void* window);
 void DeInit();
 }
 }

Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.mm

@@ -10,7 +10,7 @@ namespace ciface
 {
 namespace Quartz
 {
-void Init(void* window)
+void PopulateDevices(void* window)
 {
   g_controller_interface.AddDevice(std::make_shared<KeyboardAndMouse>(window));
 }

Source/Core/InputCommon/ControllerInterface/SDL/SDL.cpp

@@ -47,6 +47,12 @@ void Init()
     // Failed to initialize
     return;
   }
+}
+
+void PopulateDevices()
+{
+  if (!(SDL_WasInit(SDL_INIT_EVERYTHING) & SDL_INIT_JOYSTICK))
+    return;
 
   // joysticks
   for (int i = 0; i < SDL_NumJoysticks(); ++i)

Source/Core/InputCommon/ControllerInterface/SDL/SDL.h

@@ -21,6 +21,7 @@ namespace ciface
 namespace SDL
 {
 void Init();
+void PopulateDevices();
 
 class Joystick : public Core::Device
 {

Source/Core/InputCommon/ControllerInterface/XInput/XInput.cpp

@@ -85,6 +85,12 @@ void Init()
       return;
     }
   }
+}
+
+void PopulateDevices()
+{
+  if (!hXInput)
+    return;
 
   XINPUT_CAPABILITIES caps;
   for (int i = 0; i != 4; ++i)

Source/Core/InputCommon/ControllerInterface/XInput/XInput.h

@@ -23,6 +23,7 @@ namespace ciface
 namespace XInput
 {
 void Init();
+void PopulateDevices();
 void DeInit();
 
 class Device : public Core::Device

Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.cpp

@@ -46,7 +46,7 @@ namespace ciface
 namespace XInput2
 {
 // This function will add zero or more KeyboardMouse objects to devices.
-void Init(void* const hwnd)
+void PopulateDevices(void* const hwnd)
 {
   Display* dpy = XOpenDisplay(nullptr);
 

Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.h

@@ -18,7 +18,7 @@ namespace ciface
 {
 namespace XInput2
 {
-void Init(void* const hwnd);
+void PopulateDevices(void* const hwnd);
 
 class KeyboardMouse : public Core::Device
 {

Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp

@@ -141,10 +141,15 @@ static void StopHotplugThread()
 void Init()
 {
   s_devnode_name_map.clear();
+  PopulateDevices();
+  StartHotplugThread();
+}
 
-  // During initialization we use udev to iterate over all /dev/input/event* devices.
-  // Note: the Linux kernel is currently limited to just 32 event devices. If this ever
-  //            changes, hopefully udev will take care of this.
+void PopulateDevices()
+{
+  // We use udev to iterate over all /dev/input/event* devices.
+  // Note: the Linux kernel is currently limited to just 32 event devices. If
+  // this ever changes, hopefully udev will take care of this.
 
   udev* udev = udev_new();
   _assert_msg_(PAD, udev != nullptr, "Couldn't initialize libudev.");
@@ -182,8 +187,6 @@ void Init()
   }
   udev_enumerate_unref(enumerate);
   udev_unref(udev);
-
-  StartHotplugThread();
 }
 
 void Shutdown()

Source/Core/InputCommon/ControllerInterface/evdev/evdev.h

@@ -15,6 +15,7 @@ namespace ciface
 namespace evdev
 {
 void Init();
+void PopulateDevices();
 void Shutdown();
 
 class evdevDevice : public Core::Device