程序结束时清理 xcb 模块环境

src/include/xcb.h

@@ -22,3 +22,4 @@ typedef struct window_list_t {
 } window_list_t;
 window_list_t *scan_window_list(void);
 void free_window_list(window_list_t *window_list);
+void clean_xcb(void);

src/main.c

@@ -31,6 +31,7 @@ int main(int argc, char *argv[]) {
   }
 
   free_window_list(window_list);
+  clean_xcb();
 
   return 0;
 }

src/xcb/xcb.c

@@ -225,3 +225,22 @@ void free_window_list(window_list_t *window_list) {
   free(window_list->list);
   free(window_list);
 }
+
+void clean_xcb(void) {
+  if (wm_check_window != XCB_NONE) {
+    xcb_destroy_window(conn, wm_check_window);
+    wm_check_window = XCB_NONE;
+  }
+
+  if (ewmh) {
+    if (!ewmh_init_failed) {
+      xcb_ewmh_connection_wipe(ewmh);
+    }
+    ewmh_init_failed = false;
+    ewmh = NULL;
+  }
+
+  xcb_disconnect(conn);
+  conn = NULL;
+  screen = NULL;
+}