G-code queue singleton, front injection (#14236)

2019-06-19 00:00:19 -05:00
parent 75aeb41ab7
commit 4c872a01f2
32 changed files with 337 additions and 356 deletions
--- a/Marlin/src/core/macros.h
+++ b/Marlin/src/core/macros.h
@ -56,7 +56,9 @@
 #define NANOSECONDS_PER_CYCLE (1000000000.0 / F_CPU)

 // Remove compiler warning on an unused variable
-#define UNUSED(X) (void)X
+#ifndef UNUSED
+  #define UNUSED(x) ((void)(x))
+#endif

 // Macros to make a string from a macro
 #define STRINGIFY_(M) #M