From 85c2e08b87a63f6f4ca80c3771740dec743c53d0 Mon Sep 17 00:00:00 2001
From: Johannes Weiss <johannesweiss@apple.com>
Date: Wed, 23 Oct 2024 15:22:20 +0100
Subject: [PATCH] NIOPosix on Darwin: inherit main thread QoS

---
 Sources/NIOPosix/ThreadPosix.swift | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Sources/NIOPosix/ThreadPosix.swift b/Sources/NIOPosix/ThreadPosix.swift
index aacaba5b47..f876c42c8a 100644
--- a/Sources/NIOPosix/ThreadPosix.swift
+++ b/Sources/NIOPosix/ThreadPosix.swift
@@ -43,7 +43,12 @@ private func sysPthread_create(
     args: UnsafeMutableRawPointer?
 ) -> CInt {
     #if canImport(Darwin)
-    return pthread_create(handle, nil, destructor, args)
+    var attr: pthread_attr_t = .init()
+    pthread_attr_init(&attr)
+    pthread_attr_set_qos_class_np(&attr, qos_class_main(), 0)
+    let thread = pthread_create(handle, &attr, destructor, args)
+    pthread_attr_destroy(&attr)
+    return thread
     #else
     #if canImport(Musl)
     var handleLinux: OpaquePointer? = nil