152 lines
3.7 KiB
V
152 lines
3.7 KiB
V
// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module time
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#include <time.h>
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#include <errno.h>
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struct C.tm {
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tm_sec int
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tm_min int
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tm_hour int
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tm_mday int
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tm_mon int
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tm_year int
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tm_wday int
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tm_yday int
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tm_isdst int
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}
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fn C.timegm(&C.tm) C.time_t
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// fn C.gmtime_r(&tm, &gbuf)
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fn C.localtime_r(t &time_t, tm &C.tm)
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fn make_unix_time(t C.tm) int {
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return int(C.timegm(&t))
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}
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// local returns t with the location set to local time.
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pub fn (t Time) local() Time {
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loc_tm := C.tm{}
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C.localtime_r(voidptr(&t.unix), &loc_tm)
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return convert_ctime(loc_tm, t.microsecond)
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}
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// in most systems, these are __quad_t, which is an i64
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struct C.timespec {
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mut:
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tv_sec i64
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tv_nsec i64
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}
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// the first arg is defined in include/bits/types.h as `__S32_TYPE`, which is `int`
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fn C.clock_gettime(int, &C.timespec)
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fn C.nanosleep(req &C.timespec, rem &C.timespec) int
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// sys_mono_now returns a *monotonically increasing time*, NOT a time adjusted for daylight savings, location etc.
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pub fn sys_mono_now() u64 {
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$if macos {
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return sys_mono_now_darwin()
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} $else {
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ts := C.timespec{}
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C.clock_gettime(C.CLOCK_MONOTONIC, &ts)
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return u64(ts.tv_sec) * 1000000000 + u64(ts.tv_nsec)
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}
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}
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// NB: vpc_now is used by `v -profile` .
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// It should NOT call *any other v function*, just C functions and casts.
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[inline]
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fn vpc_now() u64 {
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ts := C.timespec{}
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C.clock_gettime(C.CLOCK_MONOTONIC, &ts)
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return u64(ts.tv_sec) * 1000000000 + u64(ts.tv_nsec)
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}
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// The linux_* functions are placed here, since they're used on Android as well
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// TODO: should `$if linux {}` be parsed on Android as well? (Android runs under the Linux kernel)
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// linux_now returns the local time with high precision for most os:es
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// this should be implemented properly with support for leap seconds.
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// It uses the realtime clock to get and converts it to local time
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fn linux_now() Time {
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// get the high precision time as UTC realtime clock
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// and use the nanoseconds part
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mut ts := C.timespec{}
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C.clock_gettime(C.CLOCK_REALTIME, &ts)
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loc_tm := C.tm{}
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C.localtime_r(voidptr(&ts.tv_sec), &loc_tm)
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return convert_ctime(loc_tm, int(ts.tv_nsec / 1000))
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}
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fn linux_utc() Time {
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// get the high precision time as UTC realtime clock
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// and use the nanoseconds part
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mut ts := C.timespec{}
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C.clock_gettime(C.CLOCK_REALTIME, &ts)
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return unix2(int(ts.tv_sec), int(ts.tv_nsec / 1000))
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}
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// dummy to compile with all compilers
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pub fn win_now() Time {
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return Time{}
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}
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// dummy to compile with all compilers
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pub fn win_utc() Time {
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return Time{}
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}
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// dummy to compile with all compilers
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pub struct C.timeval {
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tv_sec u64
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tv_usec u64
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}
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// return absolute timespec for now()+d
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pub fn (d Duration) timespec() C.timespec {
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mut ts := C.timespec{}
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C.clock_gettime(C.CLOCK_REALTIME, &ts)
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d_sec := d / second
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d_nsec := d % second
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ts.tv_sec += d_sec
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ts.tv_nsec += d_nsec
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if ts.tv_nsec > i64(second) {
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ts.tv_nsec -= i64(second)
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ts.tv_sec++
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}
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return ts
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}
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// return timespec of 1970/1/1
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pub fn zero_timespec() C.timespec {
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ts := C.timespec{
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tv_sec: 0
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tv_nsec: 0
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}
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return ts
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}
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// wait makes the calling thread sleep for a given duration (in nanoseconds).
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[deprecated: 'call time.sleep(n * time.second)']
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pub fn wait(duration Duration) {
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ts := &C.timespec{duration / second, duration % second}
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C.nanosleep(ts, C.NULL)
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}
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// sleep makes the calling thread sleep for a given duration (in nanoseconds).
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pub fn sleep(duration Duration) {
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mut req := C.timespec{duration / second, duration % second}
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rem := C.timespec{}
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for C.nanosleep(&req, &rem) < 0 {
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if C.errno == C.EINTR {
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// Interrupted by a signal handler
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req = rem
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} else {
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break
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}
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}
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}
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