Use atomic_bool instead of atomic_flag for doresizes

atomic_flag seems to be broken on Windows for clearing them outside the
thread they were tested and set in

src/86box.c

@@ -1321,7 +1321,7 @@ set_screen_size(int x, int y)
 		break;
     }
 
-    atomic_flag_clear(&doresize_monitors[monitor_index_global]);
+    atomic_store(&doresize_monitors[monitor_index_global], 1);
 }
 
 

src/include/86box/video.h

@@ -24,7 +24,7 @@
 
 #ifdef __cplusplus
 #include <atomic>
-using atomic_flag = std::atomic_flag;
+using atomic_bool = std::atomic_bool;
 #else
 #include <stdatomic.h>
 #endif
@@ -132,7 +132,7 @@ typedef struct monitor_settings_t {
 #define MONITORS_NUM 8
 extern monitor_t monitors[MONITORS_NUM];
 extern monitor_settings_t monitor_settings[MONITORS_NUM];
-extern atomic_flag doresize_monitors[MONITORS_NUM];
+extern atomic_bool doresize_monitors[MONITORS_NUM];
 extern int monitor_index_global;
 extern int herc_enabled;
 

src/qt/qt_main.cpp

@@ -291,11 +291,12 @@ int main(int argc, char* argv[]) {
         /* If needed, handle a screen resize. */
         for (int i = 0; i < MONITORS_NUM; i++) {
             if (!monitors[i].target_buffer) continue;
-            if (!atomic_flag_test_and_set(&doresize_monitors[i]) && !video_fullscreen && !is_quit) {
+            if (atomic_load(&doresize_monitors[i]) == 1 && !video_fullscreen && !is_quit) {
                 if (vid_resize & 2)
                     plat_resize_monitor(fixed_size_x, fixed_size_y, i);
                 else
                     plat_resize_monitor(monitors[i].mon_scrnsz_x, monitors[i].mon_scrnsz_y, i);
+                atomic_store(&doresize_monitors[i], 0);
             }
         }
 

src/qt/qt_mainwindow.cpp

@@ -1875,6 +1875,9 @@ void MainWindow::on_actionHiDPI_scaling_triggered()
     dpi_scale ^= 1;
     ui->actionHiDPI_scaling->setChecked(dpi_scale);
     emit resizeContents(monitors[0].mon_scrnsz_x, monitors[0].mon_scrnsz_y);
+    for (int i = 1; i < MONITORS_NUM; i++) {
+        if (renderers[i]) emit resizeContentsMonitor(monitors[i].mon_scrnsz_x, monitors[i].mon_scrnsz_y, i);
+    }
 }
 
 void MainWindow::on_actionHide_status_bar_triggered()

src/qt/qt_rendererstack.cpp

@@ -44,6 +44,7 @@
 #endif
 
 extern "C" {
+#include <86box/86box.h>
 #include <86box/mouse.h>
 #include <86box/plat.h>
 #include <86box/video.h>
@@ -446,6 +447,7 @@ RendererStack::blitCommon(int x, int y, int w, int h)
 
 void RendererStack::closeEvent(QCloseEvent* event)
 {
+    if (cpu_thread_run == 0 || is_quit == 0) { event->accept(); return; }
     event->ignore();
     main_window->close();
 }

src/video/video.c

@@ -103,17 +103,7 @@ static uint32_t cga_2_table[16];
 static uint8_t	thread_run = 0;
 monitor_t monitors[MONITORS_NUM];
 monitor_settings_t monitor_settings[MONITORS_NUM];
-atomic_flag doresize_monitors[MONITORS_NUM] =
+atomic_bool doresize_monitors[MONITORS_NUM];
-{
-    [0] = ATOMIC_FLAG_INIT,
-    [1] = ATOMIC_FLAG_INIT,
-    [2] = ATOMIC_FLAG_INIT,
-    [3] = ATOMIC_FLAG_INIT,
-    [4] = ATOMIC_FLAG_INIT,
-    [5] = ATOMIC_FLAG_INIT,
-    [6] = ATOMIC_FLAG_INIT,
-    [7] = ATOMIC_FLAG_INIT
-};
 int monitor_index_global = 0;
 int herc_enabled = 0;
 
@@ -945,6 +935,7 @@ video_monitor_init(int index)
     monitors[index].mon_cga_palette = calloc(1, sizeof(int));
     monitors[index].mon_force_resize = 1;
     monitors[index].mon_vid_type = VIDEO_FLAG_TYPE_NONE;
+    atomic_init(&doresize_monitors[index], 0);
     if (index >= 1) ui_init_monitor(index);
     monitors[index].mon_blit_data_ptr->blit_thread = thread_create(blit_thread, monitors[index].mon_blit_data_ptr);
 }