From 3609eb25c95624368e9da36824136dc01330aa5e Mon Sep 17 00:00:00 2001
From: Nekotekina <nekotekina@gmail.com>
Date: Sat, 6 Mar 2021 21:02:37 +0300
Subject: [PATCH] Implement thread_ctrl::is_main()

---
 Utilities/Thread.cpp | 5 +++++
 Utilities/Thread.h   | 3 +++
 rpcs3/main.cpp       | 2 ++
 3 files changed, 10 insertions(+)

diff --git a/Utilities/Thread.cpp b/Utilities/Thread.cpp
index a74fbba6c9..a74f2daf73 100644
--- a/Utilities/Thread.cpp
+++ b/Utilities/Thread.cpp
@@ -2987,3 +2987,8 @@ u64 thread_ctrl::get_tid()
 	return reinterpret_cast<u64>(pthread_self());
 #endif
 }
+
+bool thread_ctrl::is_main()
+{
+	return get_tid() == utils::main_tid;
+}
diff --git a/Utilities/Thread.h b/Utilities/Thread.h
index abcc0bc8ff..b10351d76b 100644
--- a/Utilities/Thread.h
+++ b/Utilities/Thread.h
@@ -342,6 +342,9 @@ public:
 	// Get thread ID (works for all threads)
 	static u64 get_tid();
 
+	// Check whether current thread is main thread (usually Qt GUI)
+	static bool is_main();
+
 private:
 	// Miscellaneous
 	static const u64 process_affinity_mask;
diff --git a/rpcs3/main.cpp b/rpcs3/main.cpp
index 12b89347f5..b1e487074c 100644
--- a/rpcs3/main.cpp
+++ b/rpcs3/main.cpp
@@ -377,6 +377,8 @@ int main(int argc, char** argv)
 	}
 #endif
 
+	ensure(thread_ctrl::is_main());
+
 	// Initialize TSC freq (in case it isn't)
 	static_cast<void>(utils::get_tsc_freq());