1 files changed, 29 insertions, 0 deletions
diff --git a/src/gtimer/sys_rules.h b/src/gtimer/sys_rules.h
new file mode 100644
index 00000000..6f277965
--- /dev/null
+++ b/src/gtimer/sys_rules.h
@@ -0,0 +1,29 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * @file    src/gtimer/sys_rules.h
+ * @brief   GTIMER safety rules header file.
+ *
+ * @addtogroup GTIMER
+ * @{
+ */
+
+#ifndef _GTIMER_RULES_H
+#define _GTIMER_RULES_H
+
+#if GFX_USE_GTIMER
+	#if GFX_USE_GDISP && !GDISP_NEED_MULTITHREAD
+		#if GFX_DISPLAY_RULE_WARNINGS
+			#warning "GTIMER: GDISP_NEED_MULTITHREAD has not been specified."
+			#warning "GTIMER: Make sure you are not performing any GDISP/GWIN drawing operations in the timer callback!"
+		#endif
+	#endif
+#endif
+
+#endif /* _GTIMER_RULES_H */
+/** @} */