From fd1f257ee818194140493c8ef327e79a2a82e7bd Mon Sep 17 00:00:00 2001
From: Kaspar Schleiser <kaspar@schleiser.de>
Date: Wed, 15 Dec 2021 14:33:20 +0100
Subject: [PATCH] sys: factor out US_PER_SEC etc from timex.h into time_units.h

---
 sys/include/time_units.h | 77 ++++++++++++++++++++++++++++++++++++++++
 sys/include/timex.h      | 46 +-----------------------
 2 files changed, 78 insertions(+), 45 deletions(-)
 create mode 100644 sys/include/time_units.h

diff --git a/sys/include/time_units.h b/sys/include/time_units.h
new file mode 100644
index 0000000000..fbd55a298b
--- /dev/null
+++ b/sys/include/time_units.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2021 Kaspar Schleiser <kaspar@schleiser.de>
+ * Copyright (C) 2014 Oliver Hahm <oliver.hahm@inria.fr>
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @defgroup    sys_time_units Time unit representations
+ * @brief       Timestamp representation, computation, and conversion
+ * @ingroup     sys
+ *
+ * @{
+ * @file
+ * @brief       Utility header providing time unit defines
+ */
+
+#ifndef TIME_UNITS_H
+#define TIME_UNITS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief The number of microseconds per second
+ */
+#define US_PER_SEC          (1000000LU)
+
+/**
+ * @brief The number of seconds per minute
+ */
+#define SEC_PER_MIN         (60LU)
+
+/**
+ * @brief The number of centiseconds per second
+ */
+#define CS_PER_SEC          (100LU)
+
+/**
+ * @brief The number of milliseconds per second
+ */
+#define MS_PER_SEC          (1000LU)
+
+/**
+ * @brief The number of microseconds per millisecond
+ */
+#define US_PER_MS           (1000LU)
+
+/**
+ * @brief The number of microseconds per centisecond
+ */
+#define US_PER_CS  (10000U)
+
+/**
+ * @brief The number of milliseconds per centisecond
+ */
+#define MS_PER_CS  (10U)
+
+/**
+ * @brief The number of nanoseconds per microsecond
+ */
+#define NS_PER_US           (1000LU)
+
+/**
+ * @brief The number of nanoseconds per second
+ */
+#define NS_PER_SEC  (1000000000LLU)
+
+#ifdef __cplusplus
+}
+#endif
+
+/** @} */
+#endif /* TIME_UNITS_H */
diff --git a/sys/include/timex.h b/sys/include/timex.h
index c88fe486b8..3396e21689 100644
--- a/sys/include/timex.h
+++ b/sys/include/timex.h
@@ -22,56 +22,12 @@
 
 #include <stdint.h>
 #include <inttypes.h>
+#include "time_units.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-/**
- * @brief The number of microseconds per second
- */
-#define US_PER_SEC          (1000000LU)
-
-/**
- * @brief The number of seconds per minute
- */
-#define SEC_PER_MIN         (60LU)
-
-/**
- * @brief The number of centiseconds per second
- */
-#define CS_PER_SEC          (100LU)
-
-/**
- * @brief The number of milliseconds per second
- */
-#define MS_PER_SEC          (1000LU)
-
-/**
- * @brief The number of microseconds per millisecond
- */
-#define US_PER_MS           (1000LU)
-
-/**
- * @brief The number of microseconds per centisecond
- */
-#define US_PER_CS  (10000U)
-
-/**
- * @brief The number of milliseconds per centisecond
- */
-#define MS_PER_CS  (10U)
-
-/**
- * @brief The number of nanoseconds per microsecond
- */
-#define NS_PER_US           (1000LU)
-
-/**
- * @brief The number of nanoseconds per second
- */
-#define NS_PER_SEC  (1000000000LLU)
-
 /**
  * @brief The maximum length of the string representation of a timex timestamp
  */