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hrtimer: add abstraction functions for accessing the "expires" member

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In order to be able to turn hrtimers into range based, we need to provide
accessor functions for getting to the "expires" ktime_t member of the
struct hrtimer.

This patch adds a set of accessors for this purpose:
* hrtimer_set_expires
* hrtimer_set_expires_tv64
* hrtimer_add_expires
* hrtimer_add_expires_ns
* hrtimer_get_expires
* hrtimer_get_expires_tv64
* hrtimer_get_expires_ns
* hrtimer_expires_remaining
* hrtimer_start_expires

No users of these new accessors are added yet; these follow in later patches.
Hopefully this patch can even go into 2.6.27-rc so that the conversions will
not have a bottleneck in -next

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
This commit is contained in:
Arjan van de Ven 2008-09-01 14:35:02 -07:00
parent 8ff3e8e85f
commit 63ca243b27
1 changed files with 45 additions and 0 deletions
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45
include/linux/hrtimer.h
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@ -217,6 +217,45 @@ static inline int hrtimer_is_hres_active(struct hrtimer *timer)
return timer->base->cpu_base->hres_active;
}
static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time)
{
timer->expires = time;
}
static inline void hrtimer_set_expires_tv64(struct hrtimer *timer, s64 tv64)
{
timer->expires.tv64 = tv64;
}
static inline void hrtimer_add_expires(struct hrtimer *timer, ktime_t time)
{
timer->expires = ktime_add_safe(timer->expires, time);
}
static inline void hrtimer_add_expires_ns(struct hrtimer *timer, unsigned long ns)
{
timer->expires = ktime_add_ns(timer->expires, ns);
}
static inline ktime_t hrtimer_get_expires(const struct hrtimer *timer)
{
return timer->expires;
}
static inline s64 hrtimer_get_expires_tv64(const struct hrtimer *timer)
{
return timer->expires.tv64;
}
static inline s64 hrtimer_get_expires_ns(const struct hrtimer *timer)
{
return ktime_to_ns(timer->expires);
}
static inline ktime_t hrtimer_expires_remaining(const struct hrtimer *timer)
{
return ktime_sub(timer->expires, timer->base->get_time());
}
/*
* The resolution of the clocks. The resolution value is returned in
* the clock_getres() system call to give application programmers an
@ -287,6 +326,12 @@ extern int hrtimer_start(struct hrtimer *timer, ktime_t tim,
extern int hrtimer_cancel(struct hrtimer *timer);
extern int hrtimer_try_to_cancel(struct hrtimer *timer);
static inline int hrtimer_start_expires(struct hrtimer *timer,
enum hrtimer_mode mode)
{
return hrtimer_start(timer, hrtimer_get_expires(timer), mode);
}
static inline int hrtimer_restart(struct hrtimer *timer)
{
return hrtimer_start(timer, timer->expires, HRTIMER_MODE_ABS);