-fshort-enums in release mode

Makefile

@@ -10,6 +10,7 @@ ifneq ($(DEBUG), 1)
 CFLAGS += -fno-exceptions -fno-asynchronous-unwind-tables -fno-ident
 CFLAGS += -fno-unwind-tables -fno-stack-protector -fno-plt -fno-pic
 CFLAGS += -O3 -std=c99 -march=native -mtune=native -fomit-frame-pointer
+CFLAGS += -fshort-enums
 else
 CFLAGS += -g -O0 -std=c99 -march=native -mtune=native
 CFLAGS += -DDEBUG

ringbuf.h

@@ -25,8 +25,24 @@ struct RingBuf {
   void     *buffer_end;  /** The end of the buffer */
 } __attribute__((packed));
 
-enum WriteResult { Full, WriteOk }; /** Result of a write */
-enum ReadResult { Empty, ReadOk };  /** Result of a read */
+/*
+ * Considerations: One hot encoding for the enum values 
+ * (8 bit each with -fshort-enums)
+ */
+
+/** Result of a write */
+enum WriteResult {
+  WriteOk,          /** The write was successful */
+  Full,             /** The buffer is full */
+  InsufficientSpace /** There is not enough space to write */
+};
+
+/** Result of a read */
+enum ReadResult {
+  Empty,           /** The buffer is empty */
+  ReadOk,          /** The read was successful */
+  InsufficientData /** There is not enough data to read */
+};
 
 /**
  * @brief Initialize the ring buffer