From 08442dbc83051af3bd690cdc92e4deb76d9071bf Mon Sep 17 00:00:00 2001
From: Karl Fessel <karl.fessel@ovgu.de>
Date: Fri, 25 Feb 2022 13:41:57 +0100
Subject: [PATCH] sys/ztimer/xtimer_comapt: add missing define and functions

- dummy XTIMER_BACKOFF
- xtimer_init
- xtimer_is_set
- xtimer_rmutex_lock_timeout
---
 sys/include/ztimer/xtimer_compat.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/sys/include/ztimer/xtimer_compat.h b/sys/include/ztimer/xtimer_compat.h
index 6074886856..85f2b28079 100644
--- a/sys/include/ztimer/xtimer_compat.h
+++ b/sys/include/ztimer/xtimer_compat.h
@@ -54,10 +54,29 @@ extern "C" {
 #define XTIMER_WIDTH    (32)
 #define XTIMER_MASK     (0)
 
+/**
+ * a default XTIMER_BACKOFF value, this is not used by ztimer, but other code
+ * uses this value to set timers
+ */
+
+#ifndef XTIMER_BACKOFF
+#define XTIMER_BACKOFF  1
+#endif
+
 typedef ztimer_t xtimer_t;
 typedef uint32_t xtimer_ticks32_t;
 typedef uint64_t xtimer_ticks64_t;
 
+static inline void xtimer_init(void)
+{
+    ztimer_init();
+}
+
+static inline bool xtimer_is_set(const xtimer_t *timer)
+{
+    return ztimer_is_set(ZTIMER_USEC, timer);
+}
+
 static inline xtimer_ticks32_t xtimer_ticks(uint32_t ticks)
 {
     return ticks;
@@ -197,6 +216,16 @@ static inline int xtimer_mutex_lock_timeout(mutex_t *mutex, uint64_t us)
     return 0;
 }
 
+static inline int xtimer_rmutex_lock_timeout(rmutex_t *rmutex, uint64_t us)
+{
+    assert(us <= UINT32_MAX);
+    if (ztimer_rmutex_lock_timeout(ZTIMER_USEC, rmutex, us)) {
+        /* Impedance matching required: Convert -ECANCELED error code to -1: */
+        return -1;
+    }
+    return 0;
+}
+
 static inline void xtimer_set_timeout_flag(xtimer_t *t, uint32_t timeout)
 {
     ztimer_set_timeout_flag(ZTIMER_USEC, t, timeout);