From c1740e3636c7d9b4cf89d0a7bc07c29b480aa425 Mon Sep 17 00:00:00 2001
From: PatTheMav <PatTheMav@users.noreply.github.com>
Date: Thu, 21 Jul 2022 18:35:44 +0200
Subject: [PATCH] UI: Add initialization to ensure compat between pthread and
 NSThread

Ensures that Cocoa knows that we intend to use multiple threads, per
https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/CreatingThreads/CreatingThreads.html#//apple_ref/doc/uid/10000057i-CH15-SW21
---
 UI/obs-app.cpp     | 1 +
 UI/platform-osx.mm | 9 +++++++++
 UI/platform.hpp    | 1 +
 3 files changed, 11 insertions(+)

diff --git a/UI/obs-app.cpp b/UI/obs-app.cpp
index c3fdcc006..d058c0ee4 100644
--- a/UI/obs-app.cpp
+++ b/UI/obs-app.cpp
@@ -2070,6 +2070,7 @@ static int run_program(fstream &logFile, int argc, char *argv[])
 
 #if __APPLE__
 	InstallNSApplicationSubclass();
+	InstallNSThreadLocks();
 
 	if (!isInBundle()) {
 		blog(LOG_ERROR,
diff --git a/UI/platform-osx.mm b/UI/platform-osx.mm
index 1a5ab3f13..23b4d28e5 100644
--- a/UI/platform-osx.mm
+++ b/UI/platform-osx.mm
@@ -278,6 +278,15 @@ void TaskbarOverlaySetStatus(TaskbarOverlayStatus status)
 }
 @end
 
+void InstallNSThreadLocks()
+{
+	[[NSThread new] start];
+
+	if ([NSThread isMultiThreaded] != 1) {
+		abort();
+	}
+}
+
 void InstallNSApplicationSubclass()
 {
 	[OBSApplication sharedApplication];
diff --git a/UI/platform.hpp b/UI/platform.hpp
index cef63d300..f65b31ca7 100644
--- a/UI/platform.hpp
+++ b/UI/platform.hpp
@@ -84,5 +84,6 @@ void EnableOSXVSync(bool enable);
 void EnableOSXDockIcon(bool enable);
 bool isInBundle();
 void InstallNSApplicationSubclass();
+void InstallNSThreadLocks();
 void disableColorSpaceConversion(QWidget *window);
 #endif