Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
include/clock.h | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/include/clock.h b/include/clock.h
index af5b939..123f874 100644
--- a/include/clock.h
+++ b/include/clock.h
@@ -40,4 +40,23 @@ void mdelay(unsigned long msecs);
#define MSECOND ((uint64_t)(1000 * 1000))
#define USECOND ((uint64_t)(1000))
+/*
+ * Convenience wrapper to implement a typical polling loop with
+ * timeout. returns 0 if the condition became true within the
+ * timeout or -ETIMEDOUT otherwise
+ */
+#define wait_on_timeout(timeout, condition) \
+({ \
+ int __ret = 0; \
+ uint64_t __to_start = get_time_ns(); \
+ \
+ while (!(condition)) { \
+ if (is_timeout(__to_start, (timeout))) { \
+ __ret = -ETIMEDOUT; \
+ break; \
+ } \
+ } \
+ __ret; \
+})
+
#endif /* CLOCK_H */
--
1.7.9
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