mirror of
https://github.com/Ed94/Odin.git
synced 2026-06-14 18:02:22 -07:00
hikari
119 lines
3.5 KiB
Odin
119 lines
3.5 KiB
Odin
//+build linux, darwin, freebsd, openbsd
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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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foreign import "system:pthread"
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import "core:c"
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@(private="file")
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@(default_calling_convention="c")
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foreign pthread {
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sched_yield :: proc() -> c.int ---
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}
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_yield :: proc "contextless" () {
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sched_yield()
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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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when ODIN_OS == .OpenBSD {
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CLOCK_REALTIME :: 0
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CLOCK_PROCESS_CPUTIME_ID :: 2
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CLOCK_MONOTONIC :: 3
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CLOCK_THREAD_CPUTIME_ID :: 4
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CLOCK_UPTIME :: 5
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CLOCK_BOOTTIME :: 6
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// CLOCK_MONOTONIC_RAW doesn't exist, use CLOCK_MONOTONIC
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CLOCK_MONOTONIC_RAW :: CLOCK_MONOTONIC
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} else {
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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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}
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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 "contextless" (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 "contextless" () -> 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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