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sys/unix: cache time zone info

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This commit is contained in:
Dirkjan Ochtman 2022-04-12 14:11:53 +02:00
parent 4646ec2c1c
commit f5218bfa13
1 changed files with 13 additions and 5 deletions
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18
src/offset/sys/unix.rs
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@ -8,6 +8,8 @@
// option. This file may not be copied, modified, or distributed // option. This file may not be copied, modified, or distributed
// except according to those terms. // except according to those terms.
use std::sync::Once;
use super::{DateTime, FixedOffset, Local, NaiveDateTime}; use super::{DateTime, FixedOffset, Local, NaiveDateTime};
use crate::offset::tz_info::TimeZone; use crate::offset::tz_info::TimeZone;
use crate::Utc; use crate::Utc;
@ -27,11 +29,17 @@ pub(super) fn naive_to_local(d: &NaiveDateTime, local: bool) -> DateTime<Local>
} }
fn offset(unix: i64) -> FixedOffset { fn offset(unix: i64) -> FixedOffset {
let info = unsafe {
INIT.call_once(|| {
INFO = Some(TimeZone::local().expect("unable to parse localtime info"));
});
INFO.as_ref().unwrap()
};
FixedOffset::east( FixedOffset::east(
TimeZone::local() info.find_local_time_type(unix).expect("unable to select local time type").offset(),
.expect("unable to parse localtime info")
.find_local_time_type(unix)
.expect("unable to select local time type")
.offset(),
) )
} }
static mut INFO: Option<TimeZone> = None;
static INIT: Once = Once::new();