From c17938f96ba9a3f2571387b21328743db8050250 Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Mon, 3 Jan 2022 20:31:51 -0500
Subject: [PATCH] gpu: Add shut down method to synchronize threads before
 destruction

---
 src/core/core.cpp      |  2 ++
 src/video_core/gpu.cpp | 10 ++++++++++
 src/video_core/gpu.h   |  3 +++
 3 files changed, 15 insertions(+)

diff --git a/src/core/core.cpp b/src/core/core.cpp
index aa96f709b..3f9a7f44b 100644
--- a/src/core/core.cpp
+++ b/src/core/core.cpp
@@ -317,6 +317,8 @@ struct System::Impl {
         is_powered_on = false;
         exit_lock = false;
 
+        gpu_core->NotifyShutdown();
+
         services.reset();
         service_manager.reset();
         cheat_engine.reset();
diff --git a/src/video_core/gpu.cpp b/src/video_core/gpu.cpp
index 8788f5148..44fda27ef 100644
--- a/src/video_core/gpu.cpp
+++ b/src/video_core/gpu.cpp
@@ -312,6 +312,12 @@ struct GPU::Impl {
         cpu_context->MakeCurrent();
     }
 
+    void NotifyShutdown() {
+        std::unique_lock lk{sync_mutex};
+        shutting_down.store(true, std::memory_order::relaxed);
+        sync_cv.notify_all();
+    }
+
     /// Obtain the CPU Context
     void ObtainContext() {
         cpu_context->MakeCurrent();
@@ -859,6 +865,10 @@ void GPU::Start() {
     impl->Start();
 }
 
+void GPU::NotifyShutdown() {
+    impl->NotifyShutdown();
+}
+
 void GPU::ObtainContext() {
     impl->ObtainContext();
 }
diff --git a/src/video_core/gpu.h b/src/video_core/gpu.h
index 500411176..3188b83ed 100644
--- a/src/video_core/gpu.h
+++ b/src/video_core/gpu.h
@@ -232,6 +232,9 @@ public:
     /// core timing events.
     void Start();
 
+    /// Performs any additional necessary steps to shutdown GPU emulation.
+    void NotifyShutdown();
+
     /// Obtain the CPU Context
     void ObtainContext();