v/vlib/time/time_windows.c.v

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// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module time
#include <time.h>
#include <sysinfoapi.h>
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struct C.tm {
tm_year int
tm_mon int
tm_mday int
tm_hour int
tm_min int
tm_sec int
}
struct C._FILETIME
struct SystemTime {
year u16
month u16
day_of_week u16
day u16
hour u16
minute u16
second u16
millisecond u16
}
fn C.GetSystemTimeAsFileTime(lpSystemTimeAsFileTime C._FILETIME)
fn C.FileTimeToSystemTime()
fn C.SystemTimeToTzSpecificLocalTime()
const (
// start_time is needed on Darwin and Windows because of potential overflows
start_time = init_win_time_start()
freq_time = init_win_time_freq()
start_local_time = local_as_unix_time()
)
// in most systems, these are __quad_t, which is an i64
struct C.timespec {
tv_sec i64
tv_nsec i64
}
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fn C._mkgmtime(&C.tm) time_t
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fn C.QueryPerformanceCounter(&u64) C.BOOL
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fn C.QueryPerformanceFrequency(&u64) C.BOOL
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fn make_unix_time(t C.tm) int {
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return int(C._mkgmtime(&t))
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}
fn init_win_time_freq() u64 {
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f := u64(0)
C.QueryPerformanceFrequency(&f)
return f
}
fn init_win_time_start() u64 {
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s := u64(0)
C.QueryPerformanceCounter(&s)
return s
}
pub fn sys_mono_now() u64 {
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tm := u64(0)
C.QueryPerformanceCounter(&tm) // XP or later never fail
return (tm - start_time) * 1_000_000_000 / freq_time
}
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// NB: vpc_now is used by `v -profile` .
// It should NOT call *any other v function*, just C functions and casts.
[inline]
fn vpc_now() u64 {
tm := u64(0)
C.QueryPerformanceCounter(&tm)
return tm
}
// local_as_unix_time returns the current local time as unix time
fn local_as_unix_time() int {
t := C.time(0)
tm := C.localtime(&t)
return make_unix_time(tm)
}
// win_now calculates current time using winapi to get higher resolution on windows
// GetSystemTimeAsFileTime is used. It can resolve time down to millisecond
// other more precice methods can be implemented in the future
fn win_now() Time {
ft_utc := C._FILETIME{}
C.GetSystemTimeAsFileTime(&ft_utc)
st_utc := SystemTime{}
C.FileTimeToSystemTime(&ft_utc, &st_utc)
st_local := SystemTime{}
C.SystemTimeToTzSpecificLocalTime(voidptr(0), &st_utc, &st_local)
t := Time {
year: st_local.year
month: st_local.month
day: st_local.day
hour: st_local.hour
minute: st_local.minute
second: st_local.second
microsecond: st_local.millisecond*1000
unix: u64(st_local.unix_time())
}
return t
}
// unix_time returns Unix time.
pub fn (st SystemTime) unix_time() int {
tt := C.tm{
tm_sec: st.second
tm_min: st.minute
tm_hour: st.hour
tm_mday: st.day
tm_mon: st.month - 1
tm_year: st.year - 1900
}
return make_unix_time(tt)
}
// dummy to compile with all compilers
pub fn darwin_now() Time {
return Time{}
}
// dummy to compile with all compilers
pub fn linux_now() Time {
return Time{}
}
// dummy to compile with all compilers
pub fn solaris_now() Time {
return Time{}
}
// dummy to compile with all compilers
pub struct C.timeval {
tv_sec u64
tv_usec u64
}