SDL: n3ds systhread - prefer to put audio thread on system core

SDL Commits
1 
From 301ee21f33c7e2cef4a0c484640fb028378a2fc5 Mon Sep 17 00:00:00 2001
From: ds-sloth <[EMAIL REDACTED]>
Date: Tue, 24 Oct 2023 19:11:41 -0400
Subject: [PATCH] n3ds systhread - prefer to put audio thread on system core

---
 src/thread/n3ds/SDL_systhread.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/thread/n3ds/SDL_systhread.c b/src/thread/n3ds/SDL_systhread.c
index 4dfb8fc49e56..0f633d327a4f 100644
--- a/src/thread/n3ds/SDL_systhread.c
+++ b/src/thread/n3ds/SDL_systhread.c
@@ -49,15 +49,22 @@ static void ThreadEntry(void *arg)
 
 int SDL_SYS_CreateThread(SDL_Thread *thread)
 {
-    s32 priority;
+    s32 priority = 0x30;
+    int cpu = -1;
     size_t stack_size = GetStackSize(thread->stacksize);
+
     svcGetThreadPriority(&priority, CUR_THREAD_HANDLE);
 
+    /* prefer putting audio thread on system core */
+    if (thread->name && SDL_strcmp(thread->name, "SDLAudioP") == 0 && R_SUCCEEDED(APT_SetAppCpuTimeLimit(30))) {
+        cpu = 1;
+    }
+
     thread->handle = threadCreate(ThreadEntry,
                                   thread,
                                   stack_size,
                                   priority,
-                                  -1,
+                                  cpu,
                                   false);
 
     if (thread->handle == NULL) {