Android: Finish EmulationActivity from C++

This makes EmulationActivity automatically close if booting
fails, and lets us get rid of s_emulation_end_event.

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/NativeLibrary.java

@@ -563,6 +563,20 @@ public final class NativeLibrary
     sEmulationActivity.clear();
   }
 
+  public static void finishEmulationActivity()
+  {
+    final EmulationActivity emulationActivity = sEmulationActivity.get();
+    if (emulationActivity == null)
+    {
+      Log.warning("[NativeLibrary] EmulationActivity is null.");
+    }
+    else
+    {
+      Log.verbose("[NativeLibrary] Finishing EmulationActivity.");
+      emulationActivity.runOnUiThread(emulationActivity::finish);
+    }
+  }
+
   public static void updateTouchPointer()
   {
     final EmulationActivity emulationActivity = sEmulationActivity.get();

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/activities/EmulationActivity.java

@@ -342,7 +342,6 @@ public final class EmulationActivity extends AppCompatActivity
     if (keyCode == KeyEvent.KEYCODE_BACK)
     {
       mEmulationFragment.stopEmulation();
-      finish();
       return true;
     }
     return super.onKeyLongPress(keyCode, event);
@@ -617,7 +616,6 @@ public final class EmulationActivity extends AppCompatActivity
 
       case MENU_ACTION_EXIT:
         mEmulationFragment.stopEmulation();
-        finish();
         break;
     }
   }

Source/Android/jni/AndroidCommon/IDCache.cpp

@@ -15,6 +15,7 @@ static jmethodID s_display_alert_msg;
 static jmethodID s_do_rumble;
 static jmethodID s_update_touch_pointer;
 static jmethodID s_on_title_changed;
+static jmethodID s_finish_emulation_activity;
 
 static jclass s_game_file_class;
 static jfieldID s_game_file_pointer;
@@ -94,6 +95,11 @@ jmethodID GetOnTitleChanged()
   return s_on_title_changed;
 }
 
+jmethodID GetFinishEmulationActivity()
+{
+  return s_finish_emulation_activity;
+}
+
 jclass GetAnalyticsClass()
 {
   return s_analytics_class;
@@ -221,6 +227,8 @@ jint JNI_OnLoad(JavaVM* vm, void* reserved)
   s_update_touch_pointer =
       env->GetStaticMethodID(s_native_library_class, "updateTouchPointer", "()V");
   s_on_title_changed = env->GetStaticMethodID(s_native_library_class, "onTitleChanged", "()V");
+  s_finish_emulation_activity =
+      env->GetStaticMethodID(s_native_library_class, "finishEmulationActivity", "()V");
   env->DeleteLocalRef(native_library_class);
 
   const jclass game_file_class = env->FindClass("org/dolphinemu/dolphinemu/model/GameFile");

Source/Android/jni/AndroidCommon/IDCache.h

@@ -15,6 +15,7 @@ jmethodID GetDisplayAlertMsg();
 jmethodID GetDoRumble();
 jmethodID GetUpdateTouchPointer();
 jmethodID GetOnTitleChanged();
+jmethodID GetFinishEmulationActivity();
 
 jclass GetAnalyticsClass();
 jmethodID GetSendAnalyticsReport();

Source/Android/jni/MainAndroid.cpp

@@ -77,7 +77,6 @@ ANativeWindow* s_surf;
 // sequentially for access.
 std::mutex s_host_identity_lock;
 Common::Event s_update_main_frame_event;
-Common::Event s_emulation_end_event;
 bool s_have_wm_user_stop = false;
 bool s_game_metadata_is_valid = false;
 }  // Anonymous namespace
@@ -210,17 +209,11 @@ JNIEXPORT void JNICALL Java_org_dolphinemu_dolphinemu_NativeLibrary_PauseEmulati
 
 JNIEXPORT void JNICALL Java_org_dolphinemu_dolphinemu_NativeLibrary_StopEmulation(JNIEnv*, jclass)
 {
-  {
-    std::lock_guard<std::mutex> guard(s_host_identity_lock);
-    s_emulation_end_event.Reset();
-    Core::Stop();
+  std::lock_guard<std::mutex> guard(s_host_identity_lock);
+  Core::Stop();
 
-    // Kick the waiting event
-    s_update_main_frame_event.Set();
-  }
-
-  // Wait for shutdown, to avoid accessing the config at the same time as the shutdown code
-  s_emulation_end_event.Wait();
+  // Kick the waiting event
+  s_update_main_frame_event.Set();
 }
 
 JNIEXPORT jboolean JNICALL Java_org_dolphinemu_dolphinemu_NativeLibrary_IsBooting(JNIEnv*, jclass)
@@ -533,7 +526,8 @@ static void Run(JNIEnv* env, const std::vector<std::string>& paths,
     s_surf = nullptr;
   }
 
-  s_emulation_end_event.Set();
+  env->CallStaticVoidMethod(IDCache::GetNativeLibraryClass(),
+                            IDCache::GetFinishEmulationActivity());
 }
 
 JNIEXPORT void JNICALL Java_org_dolphinemu_dolphinemu_NativeLibrary_Run___3Ljava_lang_String_2(