From b0652925faa54b9bfd5a17cfed8870a2b1f2759b Mon Sep 17 00:00:00 2001
From: Jordan Woyak <jordan.woyak@gmail.com>
Date: Sat, 26 Apr 2025 17:18:56 -0500
Subject: [PATCH] Core: Add a HookableEvent for UICommon::FlushUnsavedData.

---
 Source/Core/UICommon/UICommon.cpp | 7 +++++++
 Source/Core/UICommon/UICommon.h   | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/Source/Core/UICommon/UICommon.cpp b/Source/Core/UICommon/UICommon.cpp
index 8fe882b9ad..7d3835398f 100644
--- a/Source/Core/UICommon/UICommon.cpp
+++ b/Source/Core/UICommon/UICommon.cpp
@@ -65,6 +65,7 @@
 namespace UICommon
 {
 static Config::ConfigChangedCallbackID s_config_changed_callback_id;
+static Common::HookableEvent<> s_flush_unsaved_data_event_hook;
 
 static void CreateDumpPath(std::string path)
 {
@@ -162,9 +163,15 @@ void Shutdown()
   Config::Shutdown();
 }
 
+[[nodiscard]] Common::EventHook AddFlushUnsavedDataCallback(std::function<void()> callback)
+{
+  return s_flush_unsaved_data_event_hook.Register(std::move(callback));
+}
+
 void FlushUnsavedData()
 {
   INFO_LOG_FMT(CORE, "Flushing unsaved data...");
+  s_flush_unsaved_data_event_hook.Trigger();
 }
 
 void InitControllers(const WindowSystemInfo& wsi)
diff --git a/Source/Core/UICommon/UICommon.h b/Source/Core/UICommon/UICommon.h
index e586283816..991f584089 100644
--- a/Source/Core/UICommon/UICommon.h
+++ b/Source/Core/UICommon/UICommon.h
@@ -6,6 +6,7 @@
 #include <string>
 
 #include "Common/CommonTypes.h"
+#include "Common/HookableEvent.h"
 
 struct WindowSystemInfo;
 
@@ -14,6 +15,8 @@ namespace UICommon
 void Init();
 void Shutdown();
 
+// Triggered from the Host-thread on Android before a potential process termination.
+[[nodiscard]] Common::EventHook AddFlushUnsavedDataCallback(std::function<void()> callback);
 void FlushUnsavedData();
 
 void InitControllers(const WindowSystemInfo& wsi);