GI.GLib.Structs.TimeVal

Represents a precise time, with seconds and microseconds. Similar to the struct timeval returned by the gettimeofday() UNIX system call.

GLib is attempting to unify around the use of 64bit integers to represent microsecond-precision time. As such, this type will be removed from a future version of GLib. A consequence of using glong for tv_sec is that on 32-bit systems GTimeVal is subject to the year 2038 problem.

Exported types

newtype TimeVal

Memory-managed wrapper type.

Constructors

TimeVal (ManagedPtr TimeVal)

Instances

Eq TimeVal

Defined in GI.GLib.Structs.TimeVal

Methods

(==) :: TimeVal -> TimeVal -> Bool

(/=) :: TimeVal -> TimeVal -> Bool

WrappedPtr TimeVal

Defined in GI.GLib.Structs.TimeVal

Methods

wrappedPtrCalloc :: IO (Ptr TimeVal)

wrappedPtrCopy :: TimeVal -> IO TimeVal

wrappedPtrFree :: Maybe (GDestroyNotify TimeVal)

tag ~ 'AttrSet => Constructible TimeVal tag

Defined in GI.GLib.Structs.TimeVal

Methods

new :: MonadIO m => (ManagedPtr TimeVal -> TimeVal) -> [AttrOp TimeVal tag] -> m TimeVal

newZeroTimeVal :: MonadIO m => m TimeVal

Construct a TimeVal struct initialized to zero.

noTimeVal :: Maybe TimeVal

A convenience alias for Nothing :: Maybe TimeVal.

Methods

Overloaded methods

add

timeValAdd

Arguments

:: (HasCallStack, MonadIO m)

=> TimeVal

time_: a TimeVal

-> CLong

microseconds: number of microseconds to add to time

-> m ()

Adds the given number of microseconds to time_. microseconds can also be negative to decrease the value of time_.

fromIso8601

timeValFromIso8601

Arguments

:: (HasCallStack, MonadIO m)

=> Text

isoDate: an ISO 8601 encoded date string

-> m (Bool, TimeVal)

Returns: True if the conversion was successful.

Converts a string containing an ISO 8601 encoded date and time to a TimeVal and puts it into time_.

isoDate must include year, month, day, hours, minutes, and seconds. It can optionally include fractions of a second and a time zone indicator. (In the absence of any time zone indication, the timestamp is assumed to be in local time.)

Any leading or trailing space in isoDate is ignored.

Since: 2.12

toIso8601

timeValToIso8601

Arguments

:: (HasCallStack, MonadIO m)

=> TimeVal

time_: a TimeVal

-> m (Maybe Text)

Returns: a newly allocated string containing an ISO 8601 date, or Nothing if time_ was too large

Converts time_ into an RFC 3339 encoded string, relative to the Coordinated Universal Time (UTC). This is one of the many formats allowed by ISO 8601.

ISO 8601 allows a large number of date/time formats, with or without punctuation and optional elements. The format returned by this function is a complete date and time, with optional punctuation included, the UTC time zone represented as "Z", and the tvUsec part included if and only if it is nonzero, i.e. either "YYYY-MM-DDTHH:MM:SSZ" or "YYYY-MM-DDTHH:MM:SS.fffffZ".

This corresponds to the Internet date/time format defined by RFC 3339, and to either of the two most-precise formats defined by the W3C Note Date and Time Formats. Both of these documents are profiles of ISO 8601.

Use dateTimeFormat or g_strdup_printf() if a different variation of ISO 8601 format is required.

If time_ represents a date which is too large to fit into a struct tm, Nothing will be returned. This is platform dependent. Note also that since GTimeVal stores the number of seconds as a glong, on 32-bit systems it is subject to the year 2038 problem.

The return value of timeValToIso8601 has been nullable since GLib 2.54; before then, GLib would crash under the same conditions.

Since: 2.12

Properties

tvSec

seconds

getTimeValTvSec :: MonadIO m => TimeVal -> m CLong

Get the value of the “tv_sec” field. When overloading is enabled, this is equivalent to

get timeVal #tvSec

setTimeValTvSec :: MonadIO m => TimeVal -> CLong -> m ()

Set the value of the “tv_sec” field. When overloading is enabled, this is equivalent to

set timeVal [ #tvSec := value ]

tvUsec

microseconds

getTimeValTvUsec :: MonadIO m => TimeVal -> m CLong

Get the value of the “tv_usec” field. When overloading is enabled, this is equivalent to

get timeVal #tvUsec

setTimeValTvUsec :: MonadIO m => TimeVal -> CLong -> m ()

Set the value of the “tv_usec” field. When overloading is enabled, this is equivalent to

set timeVal [ #tvUsec := value ]