mirror of
https://github.com/Ed94/Odin.git
synced 2026-06-16 10:52:22 -07:00
gingerBill
93 lines
3.0 KiB
Odin
93 lines
3.0 KiB
Odin
//+build linux, darwin, freebsd
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package time
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IS_SUPPORTED :: true; // NOTE: Times on Darwin are UTC.
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when ODIN_OS == "darwin" {
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foreign import libc "System.framework"
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} else {
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foreign import libc "system:c"
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}
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@(default_calling_convention="c")
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foreign libc {
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@(link_name="clock_gettime") _unix_clock_gettime :: proc(clock_id: u64, timespec: ^TimeSpec) -> i32 ---;
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@(link_name="sleep") _unix_sleep :: proc(seconds: u32) -> i32 ---;
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@(link_name="nanosleep") _unix_nanosleep :: proc(requested: ^TimeSpec, remaining: ^TimeSpec) -> i32 ---;
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}
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TimeSpec :: struct {
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tv_sec : i64, /* seconds */
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tv_nsec : i64, /* nanoseconds */
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};
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CLOCK_REALTIME :: 0; // NOTE(tetra): May jump in time, when user changes the system time.
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CLOCK_MONOTONIC :: 1; // NOTE(tetra): May stand still while system is asleep.
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CLOCK_PROCESS_CPUTIME_ID :: 2;
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CLOCK_THREAD_CPUTIME_ID :: 3;
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CLOCK_MONOTONIC_RAW :: 4; // NOTE(tetra): "RAW" means: Not adjusted by NTP.
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CLOCK_REALTIME_COARSE :: 5; // NOTE(tetra): "COARSE" clocks are apparently much faster, but not "fine-grained."
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CLOCK_MONOTONIC_COARSE :: 6;
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CLOCK_BOOTTIME :: 7; // NOTE(tetra): Same as MONOTONIC, except also including time system was asleep.
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CLOCK_REALTIME_ALARM :: 8;
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CLOCK_BOOTTIME_ALARM :: 9;
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// TODO(tetra, 2019-11-05): The original implementation of this package for Darwin used this constants.
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// I do not know if Darwin programmers are used to the existance of these constants or not, so
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// I'm leaving aliases to them for now.
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CLOCK_SYSTEM :: CLOCK_REALTIME;
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CLOCK_CALENDAR :: CLOCK_MONOTONIC;
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clock_gettime :: proc(clock_id: u64) -> TimeSpec {
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ts : TimeSpec; // NOTE(tetra): Do we need to initialize this?
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_unix_clock_gettime(clock_id, &ts);
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return ts;
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}
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now :: proc() -> Time {
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time_spec_now := clock_gettime(CLOCK_REALTIME);
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ns := time_spec_now.tv_sec * 1e9 + time_spec_now.tv_nsec;
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return Time{_nsec=ns};
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}
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boot_time :: proc() -> Time {
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ts_now := clock_gettime(CLOCK_REALTIME);
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ts_boottime := clock_gettime(CLOCK_BOOTTIME);
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ns := (ts_now.tv_sec - ts_boottime.tv_sec) * 1e9 + ts_now.tv_nsec - ts_boottime.tv_nsec;
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return Time{_nsec=ns};
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}
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seconds_since_boot :: proc() -> f64 {
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ts_boottime := clock_gettime(CLOCK_BOOTTIME);
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return f64(ts_boottime.tv_sec) + f64(ts_boottime.tv_nsec) / 1e9;
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}
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sleep :: proc(d: Duration) {
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ds := duration_seconds(d);
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seconds := u32(ds);
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nanoseconds := i64((ds - f64(seconds)) * 1e9);
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if seconds > 0 { _unix_sleep(seconds); }
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if nanoseconds > 0 { nanosleep(nanoseconds); }
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}
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nanosleep :: proc(nanoseconds: i64) -> int {
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// NOTE(tetra): Should we remove this assert? We are measuring nanoseconds after all...
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assert(nanoseconds <= 999999999);
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requested := TimeSpec{tv_nsec = nanoseconds};
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remaining: TimeSpec; // NOTE(tetra): Do we need to initialize this?
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return int(_unix_nanosleep(&requested, &remaining));
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}
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_tick_now :: proc() -> Tick {
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t := clock_gettime(CLOCK_MONOTONIC_RAW);
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_nsec := t.tv_sec*1e9 + t.tv_nsec;
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return Tick{_nsec = _nsec};
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}
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