From 7d3a95f42b4e6951b576435259c3b7ae88bb60a1 Mon Sep 17 00:00:00 2001
From: omigamedev <omarator@gmail.com>
Date: Sun, 28 Jul 2019 09:40:52 +0200
Subject: [PATCH] wake up windows main loop when updating fps, use PostMessage
 instead of the blocking SendMessage

---
 src/main.cpp | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index eecab7d..de9bef7 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -23,6 +23,7 @@
 #include <sstream>
 
 #define WM_USER_CLOSE (WM_USER + 1)
+#define WM_USER_WAKEUP (WM_USER + 2)
 
 LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp);
 HINSTANCE hInst;
@@ -108,7 +109,7 @@ void destroy_window()
 {
     std::lock_guard<std::mutex> lock(main_task_mutex);
     main_tasklist.emplace_back([=] {
-        SendMessage(hWnd, WM_USER_CLOSE, 0, 0);
+        PostMessage(hWnd, WM_USER_CLOSE, 0, 0);
     });
 }
 
@@ -196,10 +197,13 @@ void win32_update_fps(int frames)
     else
         swprintf_s(title_fps, L"%s - %d fps", window_title, frames);
 
-    std::lock_guard<std::mutex> lock(main_task_mutex);
-    main_tasklist.emplace_back([] {
-        SetWindowText(hWnd, title_fps);
-    });
+    {
+        std::lock_guard<std::mutex> lock(main_task_mutex);
+        main_tasklist.emplace_back([] {
+            SetWindowText(hWnd, title_fps);
+        });
+    }
+    PostMessage(hWnd, WM_USER_WAKEUP, 0, 0);
 }
 
 void win32_show_cursor(bool visible)