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Add docs and deprecations for time.h

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This commit is contained in:
Peter Limkilde Svendsen
2025-02-02 22:19:57 +01:00
parent 1972a5f44c
commit ee4f346ef0
1 changed files with 58 additions and 1 deletions
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src/header/time/mod.rs
+58 -1
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@@ -1,4 +1,6 @@
//! time implementation for Redox, following http://pubs.opengroup.org/onlinepubs/7908799/xsh/time.h.html
//! `time.h` implementation.
//!
//! See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/time.h.html>.
use crate::{
c_str::{CStr, CString},
@@ -30,6 +32,7 @@ const YEARS_PER_ERA: time_t = 400;
const DAYS_PER_ERA: time_t = 146097;
const SECS_PER_DAY: time_t = 24 * 60 * 60;
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/time.h.html>.
#[repr(C)]
#[derive(Clone, Copy, Default)]
pub struct timespec {
@@ -68,6 +71,7 @@ impl<'a> From<&'a timespec> for syscall::TimeSpec {
}
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/time.h.html>.
#[repr(C)]
pub struct tm {
pub tm_sec: c_int, // 0 - 60
@@ -102,30 +106,48 @@ static TIMEZONE_NAMES: Mutex<OnceCell<BTreeSet<CString>>> = Mutex::new(OnceCell:
// Hold `TIMEZONE_LOCK` when updating `tzname`, `timezone`, and `daylight`.
static TIMEZONE_LOCK: Mutex<(Option<CString>, Option<CString>)> = Mutex::new((None, None));
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/time.h.html>.
#[allow(non_upper_case_globals)]
#[no_mangle]
pub static mut tzname: TzName = TzName([ptr::null_mut(); 2]);
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/time.h.html>.
#[allow(non_upper_case_globals)]
#[no_mangle]
pub static mut daylight: c_int = 0;
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/time.h.html>.
#[allow(non_upper_case_globals)]
#[no_mangle]
pub static mut timezone: c_long = 0;
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/time.h.html>.
#[repr(C)]
pub struct itimerspec {
pub it_interval: timespec,
pub it_value: timespec,
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/time.h.html>.
pub struct sigevent;
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/asctime.html>.
///
/// # Deprecation
/// The `asctime()` function was marked obsolescent in the Open Group Base
/// Specifications Issue 7.
#[deprecated]
#[no_mangle]
pub unsafe extern "C" fn asctime(timeptr: *const tm) -> *mut c_char {
asctime_r(timeptr, ASCTIME.as_mut_ptr().cast())
}
/// See <https://pubs.opengroup.org/onlinepubs/9699919799/functions/asctime.html>.
///
/// # Deprecation
/// The `asctime_r()` was marked obsolescent in the Open Group Base
/// Specifications Issue 7, and removed in Issue 8.
#[deprecated]
#[no_mangle]
pub unsafe extern "C" fn asctime_r(tm: *const tm, buf: *mut c_char) -> *mut c_char {
let tm_sec = (*tm).tm_sec;
@@ -203,6 +225,7 @@ pub unsafe extern "C" fn asctime_r(tm: *const tm, buf: *mut c_char) -> *mut c_ch
}
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/clock.html>.
#[no_mangle]
pub extern "C" fn clock() -> clock_t {
let mut ts = mem::MaybeUninit::<timespec>::uninit();
@@ -220,6 +243,7 @@ pub extern "C" fn clock() -> clock_t {
}
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/clock_getres.html>.
#[no_mangle]
pub unsafe extern "C" fn clock_getres(clock_id: clockid_t, tp: *mut timespec) -> c_int {
Sys::clock_getres(clock_id, tp)
@@ -227,6 +251,7 @@ pub unsafe extern "C" fn clock_getres(clock_id: clockid_t, tp: *mut timespec) ->
.or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/clock_getres.html>.
#[no_mangle]
pub unsafe extern "C" fn clock_gettime(clock_id: clockid_t, tp: *mut timespec) -> c_int {
Sys::clock_gettime(clock_id, tp)
@@ -234,6 +259,7 @@ pub unsafe extern "C" fn clock_gettime(clock_id: clockid_t, tp: *mut timespec) -
.or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/clock_getres.html>.
#[no_mangle]
pub unsafe extern "C" fn clock_settime(clock_id: clockid_t, tp: *const timespec) -> c_int {
Sys::clock_settime(clock_id, tp)
@@ -241,11 +267,23 @@ pub unsafe extern "C" fn clock_settime(clock_id: clockid_t, tp: *const timespec)
.or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/ctime.html>.
///
/// # Deprecation
/// The `ctime()` function was marked obsolescent in the Open Group Base
/// Specifications Issue 7.
#[deprecated]
#[no_mangle]
pub unsafe extern "C" fn ctime(clock: *const time_t) -> *mut c_char {
asctime(localtime(clock))
}
/// See <https://pubs.opengroup.org/onlinepubs/9699919799/functions/ctime.html>.
///
/// # Deprecation
/// The `ctime_r()` function was marked obsolescent in the Open Group Base
/// Specifications Issue 7, and removed in Issue 8.
#[deprecated]
#[no_mangle]
pub unsafe extern "C" fn ctime_r(clock: *const time_t, buf: *mut c_char) -> *mut c_char {
// Using MaybeUninit<tm> seems to cause a panic during the build process
@@ -254,21 +292,25 @@ pub unsafe extern "C" fn ctime_r(clock: *const time_t, buf: *mut c_char) -> *mut
asctime_r(&tm1, buf)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/difftime.html>.
#[no_mangle]
pub extern "C" fn difftime(time1: time_t, time0: time_t) -> c_double {
(time1 - time0) as _
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/getdate.html>.
// #[no_mangle]
pub extern "C" fn getdate(string: *const c_char) -> tm {
unimplemented!();
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/gmtime.html>.
#[no_mangle]
pub unsafe extern "C" fn gmtime(timer: *const time_t) -> *mut tm {
gmtime_r(timer, &mut TM)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/gmtime.html>.
#[no_mangle]
pub unsafe extern "C" fn gmtime_r(clock: *const time_t, result: *mut tm) -> *mut tm {
/* For the details of the algorithm used here, see
@@ -364,11 +406,13 @@ pub unsafe extern "C" fn gmtime_r(clock: *const time_t, result: *mut tm) -> *mut
}
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/localtime.html>.
#[no_mangle]
pub unsafe extern "C" fn localtime(clock: *const time_t) -> *mut tm {
localtime_r(clock, &mut TM)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/localtime.html>.
#[no_mangle]
pub unsafe extern "C" fn localtime_r(clock: *const time_t, t: *mut tm) -> *mut tm {
let mut lock = TIMEZONE_LOCK.lock();
@@ -390,6 +434,7 @@ pub unsafe extern "C" fn localtime_r(clock: *const time_t, t: *mut tm) -> *mut t
t
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/mktime.html>.
#[no_mangle]
pub unsafe extern "C" fn mktime(timeptr: *mut tm) -> time_t {
let mut lock = TIMEZONE_LOCK.lock();
@@ -443,11 +488,13 @@ pub unsafe extern "C" fn mktime(timeptr: *mut tm) -> time_t {
timestamp
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/nanosleep.html>.
#[no_mangle]
pub unsafe extern "C" fn nanosleep(rqtp: *const timespec, rmtp: *mut timespec) -> c_int {
Sys::nanosleep(rqtp, rmtp).map(|()| 0).or_minus_one_errno()
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/strftime.html>.
#[no_mangle]
pub unsafe extern "C" fn strftime(
s: *mut c_char,
@@ -467,6 +514,7 @@ pub unsafe extern "C" fn strftime(
}
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/time.html>.
#[no_mangle]
pub unsafe extern "C" fn time(tloc: *mut time_t) -> time_t {
let mut ts = timespec::default();
@@ -477,17 +525,21 @@ pub unsafe extern "C" fn time(tloc: *mut time_t) -> time_t {
ts.tv_sec
}
/// Non-POSIX, see <https://www.man7.org/linux/man-pages/man3/timegm.3.html>.
#[deprecated]
#[no_mangle]
pub unsafe extern "C" fn timelocal(tm: *mut tm) -> time_t {
//TODO: timezone
timegm(tm)
}
/// Non-POSIX, see <https://www.man7.org/linux/man-pages/man3/timegm.3.html>.
#[no_mangle]
pub unsafe extern "C" fn timegm(tm: *mut tm) -> time_t {
mktime(tm)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/timer_create.html>.
// #[no_mangle]
pub extern "C" fn timer_create(
clock_id: clockid_t,
@@ -497,11 +549,13 @@ pub extern "C" fn timer_create(
unimplemented!();
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/timer_delete.html>.
// #[no_mangle]
pub extern "C" fn timer_delete(timerid: timer_t) -> c_int {
unimplemented!();
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/tzset.html>.
#[no_mangle]
pub unsafe extern "C" fn tzset() {
let mut lock = TIMEZONE_LOCK.lock();
@@ -519,6 +573,7 @@ pub unsafe extern "C" fn tzset() {
set_timezone(&mut lock, &std_time, dst_time)
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/timer_getoverrun.html>.
// #[no_mangle]
pub extern "C" fn timer_settime(
timerid: timer_t,
@@ -529,11 +584,13 @@ pub extern "C" fn timer_settime(
unimplemented!();
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/timer_getoverrun.html>.
// #[no_mangle]
pub extern "C" fn timer_gettime(timerid: timer_t, value: *mut itimerspec) -> c_int {
unimplemented!();
}
/// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/timer_getoverrun.html>.
// #[no_mangle]
pub extern "C" fn timer_getoverrun(timerid: timer_t) -> c_int {
unimplemented!();