chrono.h File Reference

Tools for precise time measuring. More...

Go to the source code of this file.

Macros
#define	BILLION   1000000000L
	One billion (nanoseconds in one second).
#define	MILLION   1000000L
	One billion (miliseconds in one second).
#define	MINUTE   60000L
	Miliseconds in one minute.
#define	HOUR   (60 * MINUTE)
	Miliseconds in one hour.
#define	DAY   (24 * HOUR)
	Miliseconds in one day.
#define	USED_CLOCK   CLOCK_MONOTONIC
	The ID of the system clock to use.

Typedefs
typedef struct timespec	ptime
	Short type name for precise time.

Functions
void	millis (long ms, char *str)
	Formats the time duration in miliseconds ms into human readable string str. More...
void	nanos (long ns, char *str)
	Formats the time duration in nanoseconds ns into human readable string str. More...
ulong	lap (ptime *ts, char *str)
	Computes and prints the time lapse since ts. More...
void	print_time_res (void)
	Prints the timer resolution.

Detailed Description

Tools for precise time measuring.

Definition in file chrono.h.

Function Documentation

lap()

ulong lap	(	ptime *	ts,
		char *	str
	)

Computes and prints the time lapse since ts.

Pretty prints the elapsed time into the string str and updates ts to the current time. Does not fail if str==NULL, can also be used as a starter for the chronometer.

Warning

The string str should be at least 90 bytes long.

Parameters

ts	old time stamp
str	human readable string for the time increment

Returns

the total time in nanos

millis()

void millis	(	long	ms,
		char *	str
	)

Formats the time duration in miliseconds ms into human readable string str.

Warning

The string str should be at least 90 bytes long.

Parameters

ms	the time lapse in miliseconds
str	the human readable print

nanos()

void nanos	(	long	ns,
		char *	str
	)

Formats the time duration in nanoseconds ns into human readable string str.

Warning

The string str should be at least 90 bytes long.

Parameters

ns	the time lapse in miliseconds
str	the human readable print