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authorJohn Stultz <john.stultz@linaro.org>2014-07-16 21:03:59 +0000
committerJohn Stultz <john.stultz@linaro.org>2014-07-23 10:17:53 -0700
commit49cd6f869984692547c57621bf42697aaa7f5622 (patch)
treef0bb760b91afa73f12f6f90db14b190728c0780b /include/linux/ktime.h
parent361a3bf00582469877f8d18ff20f1efa6b781274 (diff)
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time: More core infrastructure for timespec64
Helper and conversion functions for timespec64. Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'include/linux/ktime.h')
-rw-r--r--include/linux/ktime.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index 538c283714e1..da6b680c252b 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -83,6 +83,12 @@ static inline ktime_t timespec_to_ktime(struct timespec ts)
return ktime_set(ts.tv_sec, ts.tv_nsec);
}
+/* convert a timespec64 to ktime_t format: */
+static inline ktime_t timespec64_to_ktime(struct timespec64 ts)
+{
+ return ktime_set(ts.tv_sec, ts.tv_nsec);
+}
+
/* convert a timeval to ktime_t format: */
static inline ktime_t timeval_to_ktime(struct timeval tv)
{
@@ -92,6 +98,9 @@ static inline ktime_t timeval_to_ktime(struct timeval tv)
/* Map the ktime_t to timespec conversion to ns_to_timespec function */
#define ktime_to_timespec(kt) ns_to_timespec((kt).tv64)
+/* Map the ktime_t to timespec conversion to ns_to_timespec function */
+#define ktime_to_timespec64(kt) ns_to_timespec64((kt).tv64)
+
/* Map the ktime_t to timeval conversion to ns_to_timeval function */
#define ktime_to_timeval(kt) ns_to_timeval((kt).tv64)
@@ -213,6 +222,25 @@ static inline __must_check bool ktime_to_timespec_cond(const ktime_t kt,
}
}
+/**
+ * ktime_to_timespec64_cond - convert a ktime_t variable to timespec64
+ * format only if the variable contains data
+ * @kt: the ktime_t variable to convert
+ * @ts: the timespec variable to store the result in
+ *
+ * Return: %true if there was a successful conversion, %false if kt was 0.
+ */
+static inline __must_check bool ktime_to_timespec64_cond(const ktime_t kt,
+ struct timespec64 *ts)
+{
+ if (kt.tv64) {
+ *ts = ktime_to_timespec64(kt);
+ return true;
+ } else {
+ return false;
+ }
+}
+
/*
* The resolution of the clocks. The resolution value is returned in
* the clock_getres() system call to give application programmers an