From 95fa9cbbd89ce10378ba71bb8ecb1b347fa48003 Mon Sep 17 00:00:00 2001
From: Dario <dariosamo@gmail.com>
Date: Sun, 5 May 2024 12:49:03 -0300
Subject: [PATCH] Add idle thread priority option, use it in shader compilation
 threads.

---
 src/common/rt64_thread.cpp              | 2 ++
 src/common/rt64_thread.h                | 1 +
 src/render/rt64_raster_shader_cache.cpp | 4 ++--
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/common/rt64_thread.cpp b/src/common/rt64_thread.cpp
index d483d37..3af7910 100644
--- a/src/common/rt64_thread.cpp
+++ b/src/common/rt64_thread.cpp
@@ -18,6 +18,8 @@ namespace RT64 {
 #   if defined(_WIN32)
     static int toWindowsPriority(Thread::Priority priority) {
         switch (priority) {
+        case Thread::Priority::Idle:
+            return THREAD_PRIORITY_IDLE;
         case Thread::Priority::Lowest:
             return THREAD_PRIORITY_LOWEST;
         case Thread::Priority::Low:
diff --git a/src/common/rt64_thread.h b/src/common/rt64_thread.h
index 1285cae..e7d8c5f 100644
--- a/src/common/rt64_thread.h
+++ b/src/common/rt64_thread.h
@@ -10,6 +10,7 @@
 namespace RT64 {
     struct Thread {
         enum class Priority {
+            Idle,
             Lowest,
             Low,
             Normal,
diff --git a/src/render/rt64_raster_shader_cache.cpp b/src/render/rt64_raster_shader_cache.cpp
index 23e00d1..ce13aa2 100644
--- a/src/render/rt64_raster_shader_cache.cpp
+++ b/src/render/rt64_raster_shader_cache.cpp
@@ -141,8 +141,8 @@ namespace RT64 {
     void RasterShaderCache::CompilationThread::loop() {
         Thread::setCurrentThreadName("RT64 Shader");
 
-        // The shader compilation thread should have the lowest priority by default as the application can use the ubershader in the meantime.
-        Thread::setCurrentThreadPriority(Thread::Priority::Lowest);
+        // The shader compilation thread should have idle priority by default as the application can use the ubershader in the meantime.
+        Thread::setCurrentThreadPriority(Thread::Priority::Idle);
 
         threadRunning = true;