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gdatetime: Stop using deprecated g_get_current_time()

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This requires some reworking of the internal g_date_time_new_from_unix()
function, since it previously operated in seconds, which wasn’t high
enough resolution — the g_get_current_time() code path used to operate
in microseconds.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Helps: #1438
This commit is contained in:
Philip Withnall 2019-07-24 14:25:09 +01:00
parent 2df27e3416
commit 2d62503fb0
1 changed files with 22 additions and 10 deletions
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32
glib/gdatetime.c
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@ -134,10 +134,16 @@ struct _GDateTime
#define UNIX_EPOCH_START 719163
#define INSTANT_TO_UNIX(instant) \
((instant)/USEC_PER_SECOND - UNIX_EPOCH_START * SEC_PER_DAY)
#define INSTANT_TO_UNIX_USECS(instant) \
((instant) - UNIX_EPOCH_START * SEC_PER_DAY * USEC_PER_SECOND)
#define UNIX_TO_INSTANT(unix) \
(((gint64) (unix) + UNIX_EPOCH_START * SEC_PER_DAY) * USEC_PER_SECOND)
#define UNIX_USECS_TO_INSTANT(unix_usecs) \
((gint64) (unix_usecs) + UNIX_EPOCH_START * SEC_PER_DAY * USEC_PER_SECOND)
#define UNIX_TO_INSTANT_IS_VALID(unix) \
((gint64) (unix) <= INSTANT_TO_UNIX (G_MAXINT64))
#define UNIX_USECS_TO_INSTANT_IS_VALID(unix_usecs) \
((gint64) (unix_usecs) <= INSTANT_TO_UNIX_USECS (G_MAXINT64))
#define DAYS_IN_4YEARS 1461 /* days in 4 years */
#define DAYS_IN_100YEARS 36524 /* days in 100 years */
@ -893,9 +899,9 @@ G_GNUC_END_IGNORE_DEPRECATIONS
/*< internal >
* g_date_time_new_from_unix:
* @tz: a #GTimeZone
* @t: the Unix time
* @usecs: the Unix time, in microseconds since the epoch
*
* Creates a #GDateTime corresponding to the given Unix time @t in the
* Creates a #GDateTime corresponding to the given Unix time @t_us in the
* given time zone @tz.
*
* Unix time is the number of seconds that have elapsed since 1970-01-01
@ -913,12 +919,12 @@ G_GNUC_END_IGNORE_DEPRECATIONS
**/
static GDateTime *
g_date_time_new_from_unix (GTimeZone *tz,
gint64 secs)
gint64 usecs)
{
if (!UNIX_TO_INSTANT_IS_VALID (secs))
if (!UNIX_USECS_TO_INSTANT_IS_VALID (usecs))
return NULL;
return g_date_time_from_instant (tz, UNIX_TO_INSTANT (secs));
return g_date_time_from_instant (tz, UNIX_USECS_TO_INSTANT (usecs));
}
/**
@ -943,11 +949,11 @@ g_date_time_new_from_unix (GTimeZone *tz,
GDateTime *
g_date_time_new_now (GTimeZone *tz)
{
GTimeVal tv;
gint64 now_us;
g_get_current_time (&tv);
now_us = g_get_real_time ();
return g_date_time_new_from_timeval (tz, &tv);
return g_date_time_new_from_unix (tz, now_us);
}
/**
@ -1027,8 +1033,11 @@ g_date_time_new_from_unix_local (gint64 t)
GDateTime *datetime;
GTimeZone *local;
if (t > G_MAXINT64 / USEC_PER_SECOND)
return NULL;
local = g_time_zone_new_local ();
datetime = g_date_time_new_from_unix (local, t);
datetime = g_date_time_new_from_unix (local, t * USEC_PER_SECOND);
g_time_zone_unref (local);
return datetime;
@ -1059,8 +1068,11 @@ g_date_time_new_from_unix_utc (gint64 t)
GDateTime *datetime;
GTimeZone *utc;
if (t > G_MAXINT64 / USEC_PER_SECOND)
return NULL;
utc = g_time_zone_new_utc ();
datetime = g_date_time_new_from_unix (utc, t);
datetime = g_date_time_new_from_unix (utc, t * USEC_PER_SECOND);
g_time_zone_unref (utc);
return datetime;