Local and Network time

Time manipulation tools. More...

Collaboration diagram for Local and Network time:

Macros
#define	GF_NTP_SEC_1900_TO_1970
	NTP seconds from 1900 to 1970. More...

Functions
void	gf_utc_time_since_1970 (u32 *sec, u32 *msec)
	gets UTC time More...
void	gf_net_get_ntp (u32 *sec, u32 *frac)
	gets NTP time More...
u64	gf_net_get_ntp_ms ()
	gets NTP time in milliseconds More...
void	gf_net_set_ntp_shift (s32 sec)
	offsets NTP time by a given amount of seconds More...
u64	gf_net_get_ntp_ts ()
	gets NTP time More...
s32	gf_net_get_ntp_diff_ms (u64 ntp)
s32	gf_net_ntp_diff_ms (u64 ntp_a, u64 ntp_b)
const char *	gf_errno_str (int errnoval)
	error code description More...
u32	gf_sys_clock ()
	System clock query. More...
u64	gf_sys_clock_high_res ()
	High precision system clock query. More...
void	gf_sleep (u32 ms)
	Sleeps thread/process. More...
u64	gf_net_get_utc ()
	gets UTC time in milliseconds More...
u64	gf_net_ntp_to_utc (u64 ntp)
	converts an ntp timestamp into UTC time in milliseconds More...
u64	gf_net_parse_date (const char *date)
	parses date More...
u64	gf_net_get_utc_ts (u32 year, u32 month, u32 day, u32 hour, u32 min, u32 sec)
	returns 64-bit UTC timestamp from year, month, day, hour, min and sec More...
s32	gf_net_get_timezone ()
	gets timezone adjustment in seconds More...
Bool	gf_net_time_is_dst ()
	gets timezone daylight saving time status More...
struct tm *	gf_gmtime (const time_t *time)
	gets time from UTC timestamp More...

Detailed Description

Macro Definition Documentation

GF_NTP_SEC_1900_TO_1970

#define GF_NTP_SEC_1900_TO_1970

Macro giving the number of seconds from 1900 to 1970

Function Documentation

gf_utc_time_since_1970()

void gf_utc_time_since_1970	(	u32 *	sec,
		u32 *	msec
	)

Gets UTC time since midnight Jan 1970

Parameters

sec	number of seconds
msec	number of milliseconds

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gf_net_get_ntp()

void gf_net_get_ntp	(	u32 *	sec,
		u32 *	frac
	)

Gets NTP (Network Time Protocol) in seconds and fractional side

Parameters

sec	NTP time in seconds
frac	fractional NTP time expressed in 1 / (1<<32 - 1) seconds units

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gf_net_get_ntp_ms()

u64 gf_net_get_ntp_ms

(

)

Returns

NTP time in milliseconds

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gf_net_set_ntp_shift()

void gf_net_set_ntp_shift

(

s32

sec

)

Offsets NTP time of the system by a given amount of seconds in the future or the past (default value is 0).

Parameters

sec	seconds to add or remove to the system NTP

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gf_net_get_ntp_ts()

u64 gf_net_get_ntp_ts

(

)

Gets NTP (Network Time Protocol) timestamp (high 32 bit is seconds, low 32 bit is fraction)

Returns

NTP timestamp

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gf_net_get_ntp_diff_ms()

s32 gf_net_get_ntp_diff_ms

(

u64

ntp

)

Gets diff in milliseconds between NTP time and current time

Parameters

ntp	NTP timestamp

Returns

diff in milliseconds with the current time

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gf_net_ntp_diff_ms()

s32 gf_net_ntp_diff_ms	(	u64	ntp_a,
		u64	ntp_b
	)

Gets diff in milliseconds between two NTP times time and current time

Parameters

ntp_a	first NTP timestamp
ntp_b	second NTP timestamp

Returns

diff ntp_a minus ntp_b in milliseconds

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gf_errno_str()

const char* gf_errno_str

(

int

errnoval

)

Returns text description of given errno code

Parameters

errnoval

the error value to test

Returns

its description

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gf_sys_clock()

u32 gf_sys_clock

(

)

Gets the system clock time.

Returns

System clock value since GPAC initialization in milliseconds.

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gf_sys_clock_high_res()

u64 gf_sys_clock_high_res

(

)

Gets the hight precision system clock time.

Returns

System clock value since GPAC initialization in microseconds.

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gf_sleep()

void gf_sleep

(

u32

ms

)

Locks calling thread/process execution for a given time.

Parameters

ms	Amount of time to sleep in milliseconds.

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gf_net_get_utc()

u64 gf_net_get_utc

(

)

Gets UTC clock in milliseconds

Returns

UTC time in milliseconds

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gf_net_ntp_to_utc()

u64 gf_net_ntp_to_utc

(

u64

ntp

)

Converts NTP 64-bit timestamp to UTC clock in milliseconds

Parameters

ntp	NTP timestamp

Returns

UTC time in milliseconds

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gf_net_parse_date()

u64 gf_net_parse_date

(

const char *

date

)

Parses date and gets UTC value for this date. Date format is an XSD dateTime format or any of the supported formats from HTTP 1.1: Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123 Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036 Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() formatgets UTC time in milliseconds

Parameters

date	string containing the date to parse

Returns

UTC time in milliseconds

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gf_net_get_utc_ts()

u64 gf_net_get_utc_ts	(	u32	year,
		u32	month,
		u32	day,
		u32	hour,
		u32	min,
		u32	sec
	)

Parameters

year	the year
month	the month, from 0 to 11
day	the day
hour	the hour
min	the min
sec	the sec

Returns

UTC time in milliseconds

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gf_net_get_timezone()

s32 gf_net_get_timezone

(

)

Gets timezone adjustment in seconds, with localtime - timezone = UTC time

Returns

timezone shift in seconds

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gf_net_time_is_dst()

Bool gf_net_time_is_dst

(

)

Gets timezone daylight saving time

Returns

GF_TRUE if DST is active

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gf_gmtime()

struct tm* gf_gmtime

(

const time_t *

time

)

Gets time from UTC timestamp

Parameters

time	timestamp value - see gmtime

Returns

time description structure - see gmtime

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