Merge pull request #13689 from JosJuice/lock-core-any-thread

Core: Let any thread call previously host-thread-only functions

Source/Core/DolphinQt/Host.cpp

@@ -8,6 +8,7 @@
 #include <QAbstractEventDispatcher>
 #include <QApplication>
 #include <QLocale>
+#include <QThread>
 
 #include <imgui.h>
 
@@ -245,7 +246,8 @@ bool Host_TASInputHasFocus()
 
 void Host_YieldToUI()
 {
-  qApp->processEvents(QEventLoop::ExcludeUserInputEvents);
+  if (qApp->thread() == QThread::currentThread())
+    qApp->processEvents(QEventLoop::ExcludeUserInputEvents);
 }
 
 void Host_UpdateDisasmDialog()

Source/Core/DolphinQt/Main.cpp

@@ -127,8 +127,6 @@ int main(int argc, char* argv[])
   }
 #endif
 
-  Core::DeclareAsHostThread();
-
 #ifdef __APPLE__
   // On macOS, a command line option matching the format "-psn_X_XXXXXX" is passed when
   // the application is launched for the first time. This is to set the "ProcessSerialNumber",

Source/Core/DolphinQt/Settings.cpp

@@ -17,6 +17,7 @@
 #include <QSize>
 #include <QStyle>
 #include <QStyleHints>
+#include <QThread>
 #include <QWidget>
 
 #include "AudioCommon/AudioCommon.h"
@@ -76,7 +77,7 @@ Settings::Settings()
   });
 
   m_hotplug_event_hook = g_controller_interface.RegisterDevicesChangedCallback([this] {
-    if (Core::IsHostThread())
+    if (qApp->thread() == QThread::currentThread())
     {
       emit DevicesChanged();
     }