Input: Improve Controller Interface devices threading

This specific issue was already addressed by https://github.com/dolphin-emu/dolphin/pull/11635
though I felt like there was something more we could do, and wasn't too happy with the
likelihood of devices update calls being skipped (due to `m_devices_population_mutex` being locked).

4 files changed, 8 insertions, 4 deletions

diff --git a/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.cpp b/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.cpp
index eb60721b2f..f095818287 100644
--- a/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.cpp
@@ -222,7 +222,7 @@ bool Joystick::IsValid() const
   return SUCCEEDED(m_device->Acquire());
 }
 
-void Joystick::UpdateInput()
+Core::DeviceRemoval Joystick::UpdateInput()
 {
   HRESULT hr = 0;
 
@@ -261,6 +261,8 @@ void Joystick::UpdateInput()
   // try reacquire if input lost
   if (DIERR_INPUTLOST == hr || DIERR_NOTACQUIRED == hr)
     m_device->Acquire();
+
+  return Core::DeviceRemoval::Keep;
 }
 
 // get name
diff --git a/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.h b/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.h
index f69b95293c..cb73f373f8 100644
--- a/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.h
+++ b/Source/Core/InputCommon/ControllerInterface/DInput/DInputJoystick.h
@@ -57,7 +57,7 @@ private:
   };
 
 public:
-  void UpdateInput() override;
+  Core::DeviceRemoval UpdateInput() override;
 
   Joystick(const LPDIRECTINPUTDEVICE8 device);
   ~Joystick();
diff --git a/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.cpp b/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.cpp
index 551afde423..3c6a82dcd8 100644
--- a/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.cpp
@@ -205,7 +205,7 @@ void KeyboardMouse::UpdateCursorInput()
   m_state_in.cursor.y = (ControlState(point.y) / win_height * 2 - 1) * window_scale.y;
 }
 
-void KeyboardMouse::UpdateInput()
+Core::DeviceRemoval KeyboardMouse::UpdateInput()
 {
   UpdateCursorInput();
 
@@ -254,6 +254,8 @@ void KeyboardMouse::UpdateInput()
     else
       INFO_LOG_FMT(CONTROLLERINTERFACE, "Keyboard device failed to re-acquire, we'll retry later");
   }
+
+  return Core::DeviceRemoval::Keep;
 }
 
 std::string KeyboardMouse::GetName() const
diff --git a/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.h b/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.h
index eba4c8ab93..e7187849f6 100644
--- a/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.h
+++ b/Source/Core/InputCommon/ControllerInterface/DInput/DInputKeyboardMouse.h
@@ -94,7 +94,7 @@ private:
   };
 
 public:
-  void UpdateInput() override;
+  Core::DeviceRemoval UpdateInput() override;
 
   KeyboardMouse(const LPDIRECTINPUTDEVICE8 kb_device, const LPDIRECTINPUTDEVICE8 mo_device);
   ~KeyboardMouse();