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v/vlib/time/time_linux.c.v
2020-06-07 16:19:09 +03:00

42 lines
1.1 KiB
V

module time
fn sys_mono_now_darwin() u64 {
return 0
}
// dummy to compile with all compilers
pub fn darwin_now() Time {
return Time{}
}
// dummy to compile with all compilers
pub fn solaris_now() Time {
return Time{}
}
// linux_now returns the local time with high precision for most os:es
// this should be implemented with native system calls eventually
// but for now a bit tweaky. It uses the realtime clock to get
// the nano seconds part and normal local time to get correct local time
// if the time has shifted on a second level between calls it uses
// zero as microsecond. Not perfect but better that unix time only
fn linux_now() Time {
// get the high precision time as UTC realtime clock
// and use the nanoseconds part
mut ts := C.timespec{}
C.clock_gettime(C.CLOCK_REALTIME, &ts)
t := C.time(0)
tm := C.localtime(&t)
// if the second part (very rare) is different
// microseconds is set to zero since it passed the second
// also avoid divide by zero if nsec is zero
if int(t) != ts.tv_sec || ts.tv_nsec == 0 {
return convert_ctime(tm, 0)
}
return convert_ctime(tm, int(ts.tv_nsec/1000))
}