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time: More core infrastructure for timespec64

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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>
This commit is contained in:
John Stultz
2014-07-16 21:03:59 +00:00
parent 361a3bf005
commit 49cd6f8699
3 changed files with 118 additions and 0 deletions
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28
include/linux/ktime.h
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@@ -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