From 4375b7e8f9d3cf49b17a519328c96667f9ad3e92 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Fri, 12 Jul 2024 08:58:18 -0700
Subject: [PATCH] Make sure SDL subsystems are initialized before starting
 threads

---
 src/SDL.c               | 46 ++++++++++++++++++++++++++++-------------
 src/SDL_internal.h      |  2 ++
 src/thread/SDL_thread.c |  7 +------
 3 files changed, 35 insertions(+), 20 deletions(-)

diff --git a/src/SDL.c b/src/SDL.c
index b55facdb7fe51..2b2704cd2e845 100644
--- a/src/SDL.c
+++ b/src/SDL.c
@@ -114,6 +114,7 @@ static SDL_bool SDL_MainIsReady = SDL_FALSE;
 #else
 static SDL_bool SDL_MainIsReady = SDL_TRUE;
 #endif
+static SDL_bool SDL_main_thread_initialized = SDL_FALSE;
 static SDL_bool SDL_bInMainQuit = SDL_FALSE;
 static Uint8 SDL_SubsystemRefCount[32];
 
@@ -179,6 +180,36 @@ void SDL_SetMainReady(void)
     SDL_MainIsReady = SDL_TRUE;
 }
 
+void SDL_InitMainThread(void)
+{
+    if (SDL_main_thread_initialized) {
+        return;
+    }
+
+    SDL_InitTLSData();
+#ifndef SDL_TIMERS_DISABLED
+    SDL_TicksInit();
+#endif
+    SDL_LogInit();
+
+    SDL_main_thread_initialized = SDL_TRUE;
+}
+
+static void SDL_QuitMainThread(void)
+{
+    if (!SDL_main_thread_initialized) {
+        return;
+    }
+
+    SDL_LogQuit();
+#ifndef SDL_TIMERS_DISABLED
+    SDL_TicksQuit();
+#endif
+    SDL_QuitTLSData();
+
+    SDL_main_thread_initialized = SDL_FALSE;
+}
+
 int SDL_InitSubSystem(Uint32 flags)
 {
     Uint32 flags_initialized = 0;
@@ -187,9 +218,6 @@ int SDL_InitSubSystem(Uint32 flags)
         return SDL_SetError("Application didn't initialize properly, did you include SDL_main.h in the file containing your main() function?");
     }
 
-    SDL_InitTLSData();
-    SDL_LogInit();
-
     /* Clear the error message */
     SDL_ClearError();
 
@@ -205,10 +233,6 @@ int SDL_InitSubSystem(Uint32 flags)
     }
 #endif
 
-#ifndef SDL_TIMERS_DISABLED
-    SDL_TicksInit();
-#endif
-
     /* Initialize the event subsystem */
     if (flags & SDL_INIT_EVENTS) {
 #ifndef SDL_EVENTS_DISABLED
@@ -496,10 +520,6 @@ void SDL_Quit(void)
 #endif
     SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
 
-#ifndef SDL_TIMERS_DISABLED
-    SDL_TicksQuit();
-#endif
-
 #ifdef SDL_USE_LIBDBUS
     SDL_DBus_Quit();
 #endif
@@ -507,14 +527,12 @@ void SDL_Quit(void)
     SDL_ClearHints();
     SDL_AssertionsQuit();
 
-    SDL_LogQuit();
-
     /* Now that every subsystem has been quit, we reset the subsystem refcount
      * and the list of initialized subsystems.
      */
     SDL_memset(SDL_SubsystemRefCount, 0x0, sizeof(SDL_SubsystemRefCount));
 
-    SDL_QuitTLSData();
+    SDL_QuitMainThread();
 
     SDL_bInMainQuit = SDL_FALSE;
 }
diff --git a/src/SDL_internal.h b/src/SDL_internal.h
index b193edef62f27..511c652407320 100644
--- a/src/SDL_internal.h
+++ b/src/SDL_internal.h
@@ -208,6 +208,8 @@
 #include "SDL_assert.h"
 #include "SDL_log.h"
 
+extern void SDL_InitMainThread(void);
+
 #endif /* SDL_internal_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */
diff --git a/src/thread/SDL_thread.c b/src/thread/SDL_thread.c
index 5b5dae8fa3d7a..fae6b2dcfe201 100644
--- a/src/thread/SDL_thread.c
+++ b/src/thread/SDL_thread.c
@@ -27,7 +27,6 @@
 #include "SDL_systhread.h"
 #include "SDL_hints.h"
 #include "../SDL_error_c.h"
-#include "../timer/SDL_timer_c.h"
 
 /* The storage is local to the thread, but the IDs are global for the process */
 
@@ -370,11 +369,7 @@ SDL_Thread *SDL_CreateThreadWithStackSize(int(SDLCALL *fn)(void *),
     SDL_Thread *thread;
     int ret;
 
-    SDL_InitTLSData();
-
-#ifndef SDL_TIMERS_DISABLED
-    SDL_TicksInit();
-#endif
+    SDL_InitMainThread();
 
     /* Allocate memory for the thread info structure */
     thread = (SDL_Thread *)SDL_calloc(1, sizeof(*thread));