Time-keeping: a clock that is steady, convertible to system time, and ideally high-resolution. More...

#include "xrt/xrt_compiler.h"
#include <stdint.h>
#include <time.h>

Include dependency graph for u_time.h:

Macros
#define	U_1_000_000_000 (1000 * 1000 * 1000)
	Helper define to make code more readable. More...

#define	U_TIME_1S_IN_NS U_1_000_000_000
	The number of nanoseconds in a second. More...

#define	U_TIME_1MS_IN_NS (1000 * 1000)
	The number of nanoseconds in a millisecond. More...

#define	U_TIME_HALF_MS_IN_NS (U_TIME_1MS_IN_NS / 2)
	The number of nanoseconds in half a millisecond. More...

Typedefs
typedef int64_t	timepoint_ns
	Integer timestamp type. More...

typedef int64_t	time_duration_ns
	Integer duration type in nanoseconds. More...

Functions
static double	time_ns_to_s (time_duration_ns ns)
	Convert nanoseconds duration to double seconds. More...

static time_duration_ns	time_s_to_ns (double duration)
	Convert float seconds to nanoseconds. More...

static double	time_ns_to_ms_f (time_duration_ns ns)
	Convert nanoseconds to double float milliseconds, useful for printing. More...

static timepoint_ns	time_ms_f_to_ns (double ms_f)
	Convert double float milliseconds to nanoseconds, human comprehensible config inputs. More...

static bool	time_is_within_range_of_each_other (timepoint_ns a, timepoint_ns b, int64_t range)
	Checks if two timepoints are with a certain range of each other. More...

static bool	time_is_within_half_ms (timepoint_ns a, timepoint_ns b)
	Checks if two timepoints are with half a millisecond of each other. More...

static bool	time_is_less_then_or_within_range (timepoint_ns a, timepoint_ns b, int64_t range)
	Fuzzy comparisons. More...

static bool	time_is_less_then_or_within_half_ms (timepoint_ns a, timepoint_ns b)
	Fuzzy comparisons. More...

static bool	time_is_greater_then_or_within_range (timepoint_ns a, timepoint_ns b, int64_t range)
	Fuzzy comparisons. More...

static bool	time_is_greater_then_or_within_half_ms (timepoint_ns a, timepoint_ns b)
	Fuzzy comparisons. More...

Detailed Description

Time-keeping: a clock that is steady, convertible to system time, and ideally high-resolution.

Designed to suit the needs of OpenXR: you can and should use something simpler (like Portable Timekeeping) for most purposes that aren't in OpenXR interface code.