From 0345cbdda3cf4c7a38e56379dd20f6eac31d0184 Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Wed, 19 Oct 2022 23:48:20 +0200
Subject: [PATCH] only limit ticks in gui thread

---
 inc/dd.h    | 1 +
 src/dd.c    | 1 +
 src/utils.c | 3 +++
 3 files changed, 5 insertions(+)

diff --git a/inc/dd.h b/inc/dd.h
index 88b5065..d77962f 100644
--- a/inc/dd.h
+++ b/inc/dd.h
@@ -173,6 +173,7 @@ typedef struct CNCDDRAW
     BOOL show_driver_warning;
     SPEEDLIMITER ticks_limiter;
     SPEEDLIMITER flip_limiter;
+    DWORD gui_thread;
 
 } CNCDDRAW;
 
diff --git a/src/dd.c b/src/dd.c
index 0aeff1c..b118b7f 100644
--- a/src/dd.c
+++ b/src/dd.c
@@ -890,6 +890,7 @@ HRESULT dd_SetCooperativeLevel(HWND hwnd, DWORD dwFlags)
         hook_init();
 
         g_ddraw->wndproc = (WNDPROC)real_SetWindowLongA(g_ddraw->hwnd, GWL_WNDPROC, (LONG)fake_WndProc);
+        g_ddraw->gui_thread = GetWindowThreadProcessId(hwnd, NULL);
 
         if (!g_ddraw->render.hdc)
         {
diff --git a/src/utils.c b/src/utils.c
index b2f7f87..40937d7 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -62,6 +62,9 @@ BOOL util_is_avx_supported()
 
 void util_limit_game_ticks()
 {
+    if (GetCurrentThreadId() != g_ddraw->gui_thread)
+        return;
+
     if (g_ddraw->ticks_limiter.htimer)
     {
         FILETIME ft = { 0 };