From d4bb05ae25943ae04e321f2c66bc5ab4f4fd911c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A1nos=20Tur=C3=A1nszki?= <turanszkij@gmail.com>
Date: Wed, 14 Jan 2026 17:32:44 +0100
Subject: [PATCH] apple platform improvements

---
 WickedEngine/wiJobSystem.cpp | 19 +++++++++++++++++++
 WickedEngine/wiPlatform.h    |  2 +-
 WickedEngine/wiSpinLock.h    | 20 +++++++++++++-------
 WickedEngine/wiVersion.cpp   |  2 +-
 4 files changed, 34 insertions(+), 9 deletions(-)

diff --git a/WickedEngine/wiJobSystem.cpp b/WickedEngine/wiJobSystem.cpp
index ce032d0bd..440c85065 100644
--- a/WickedEngine/wiJobSystem.cpp
+++ b/WickedEngine/wiJobSystem.cpp
@@ -28,6 +28,10 @@
 #include "wiJobSystem_PS5.h"
 #endif // PLATFORM_PS5
 
+#ifdef __APPLE__
+#include <sys/qos.h>
+#endif // __APPLE__
+
 namespace wi::jobsystem
 {
 	struct alignas(64) Job
@@ -306,6 +310,21 @@ namespace wi::jobsystem
 					default:
 						assert(0);
 					}
+#elif defined(__APPLE__)
+					switch (priority)
+					{
+					case Priority::High:
+						pthread_set_qos_class_self_np(QOS_CLASS_USER_INTERACTIVE, 0);
+						break;
+					case Priority::Low:
+						pthread_set_qos_class_self_np(QOS_CLASS_UTILITY, 0);
+						break;
+					case Priority::Streaming:
+						pthread_set_qos_class_self_np(QOS_CLASS_BACKGROUND, 0);
+						break;
+					default:
+						assert(0);
+					}
 #endif // PLATFORM_LINUX
 
 					while (internal_state.alive.load(std::memory_order_relaxed))
diff --git a/WickedEngine/wiPlatform.h b/WickedEngine/wiPlatform.h
index 25242f1f0..9cd659b8d 100644
--- a/WickedEngine/wiPlatform.h
+++ b/WickedEngine/wiPlatform.h
@@ -71,7 +71,7 @@ namespace wi::platform
 		SDL_Event quit_event;
 		quit_event.type = SDL_QUIT;
 		SDL_PushEvent(&quit_event);
-#else
+#elif defined(__APPLE__)
 		std::exit(0);
 #endif
 		
diff --git a/WickedEngine/wiSpinLock.h b/WickedEngine/wiSpinLock.h
index e0cf3119b..40f4c5d7f 100644
--- a/WickedEngine/wiSpinLock.h
+++ b/WickedEngine/wiSpinLock.h
@@ -3,16 +3,17 @@
 #include <thread>
 
 #if defined(_M_ARM64) || defined(__arm64__)
-#include <mutex>
+#ifdef _WIN32
+#include <intrin.h> // __yield()
+#else
+#include <arm_acle.h> // __yield()
+#endif // _WIN32
 #else
 #include <emmintrin.h> // _mm_pause()
 #endif // efined(_M_ARM64) || defined(__arm64__)
 
 namespace wi
 {
-#if defined(_M_ARM64) || defined(__arm64__)
-	using SpinLock = std::mutex;
-#else
 	class SpinLock
 	{
 	private:
@@ -25,11 +26,17 @@ namespace wi
 			{
 				if (spin < 10)
 				{
-					_mm_pause(); // SMT thread swap can occur here
+					// SMT thread swap can occur here:
+#if defined(_M_ARM64) || defined(__arm64__)
+					__yield();
+#else
+					_mm_pause();
+#endif // defined(_M_ARM64) || defined(__arm64__)
 				}
 				else
 				{
-					std::this_thread::yield(); // OS thread swap can occur here. It is important to keep it as fallback, to avoid any chance of lockup by busy wait
+					// OS thread swap can occur here. It is important to keep it as fallback, to avoid any chance of lockup by busy wait
+					std::this_thread::yield();
 				}
 				spin++;
 			}
@@ -44,5 +51,4 @@ namespace wi
 			lck.clear(std::memory_order_release);
 		}
 	};
-#endif // efined(_M_ARM64) || defined(__arm64__)
 }
diff --git a/WickedEngine/wiVersion.cpp b/WickedEngine/wiVersion.cpp
index 0c82f360d..e5fa54069 100644
--- a/WickedEngine/wiVersion.cpp
+++ b/WickedEngine/wiVersion.cpp
@@ -9,7 +9,7 @@ namespace wi::version
 	// minor features, major updates, breaking compatibility changes
 	const int minor = 72;
 	// minor bug fixes, alterations, refactors, updates
-	const int revision = 2;
+	const int revision = 3;
 
 	const std::string version_string = std::to_string(major) + "." + std::to_string(minor) + "." + std::to_string(revision);