HelClockPage Struct Reference

Parameters that allow userspace to compute the current time on the monotone clock (i.e., the clock read by helGetClock()) without performing syscalls. More...

#include <hel.h>

Public Attributes
uint32_t	clockType
	One of the kHelClock* constants.
int32_t	tickShift
	Scaling exponent of the tick -> nanosecond conversion.
uint64_t	tickFactor
	Factor of the tick -> nanosecond conversion.

Detailed Description

Parameters that allow userspace to compute the current time on the monotone clock (i.e., the clock read by helGetClock()) without performing syscalls.

Obtained as a read-only memory object via helObtainHandle() with kHelObtainClockPage. All fields are protected by a seqlock: readers repeat the read while seqlock is odd or while it changes during the read.

The conversion from clock ticks to nanoseconds is (tickFactor * ticks) >> tickShift. The multiplication is performed in 128-bit arithmetic.

---

The documentation for this struct was generated from the following file:

• hel.h