struct hrtimer_clock_base — the timer base for a specific clock
struct hrtimer_clock_base {
struct hrtimer_cpu_base * cpu_base;
clockid_t index;
struct rb_root active;
struct rb_node * first;
ktime_t resolution;
ktime_t (* get_time) (void);
ktime_t (* get_softirq_time) (void);
ktime_t softirq_time;
#ifdef CONFIG_HIGH_RES_TIMERS
ktime_t offset;
int (* reprogram) (struct hrtimer *t,struct hrtimer_clock_base *b,ktime_t n);
#endif
}; per cpu clock base
clock type index for per_cpu support when moving a timer to a base on another cpu.
red black tree root node for the active timers
pointer to the timer node which expires first
the resolution of the clock, in nanoseconds
function to retrieve the current time of the clock
function to retrieve the current time from the softirq
the time when running the hrtimer queue in the softirq
offset of this clock to the monotonic base
function to reprogram the timer event