1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* CFL
* ===
* Copyright (C) 2022 The CFL Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cfl/cfl.h>
/* MacOS */
#ifdef CFL_HAVE_CLOCK_GET_TIME
#include <mach/clock.h>
#include <mach/mach.h>
#endif
#include <inttypes.h>
#include <time.h>
uint64_t cfl_time_now()
{
struct timespec tm = {0};
/*
* macOS note: newer versions of macOS provides a timespec_get() function, but for
* some reason it does not provide full nanoseconds resolution, last 3 digits are
* always zeros.
*
* if CFL_HAVE_CLOCK_GET_TIME and CFL_HAVE_TIMESPEC_GET are defined, let's
* prioritize CFL_HAVE_CLOCK_GET_TIME.
*/
#if defined CFL_HAVE_CLOCK_GET_TIME
/* MacOS */
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
clock_get_time(cclock, &mts);
tm.tv_sec = mts.tv_sec;
tm.tv_nsec = mts.tv_nsec;
mach_port_deallocate(mach_task_self(), cclock);
#elif defined CFL_HAVE_TIMESPEC_GET
/* C11 supported */
timespec_get(&tm, TIME_UTC);
#else /* __STDC_VERSION__ */
clock_gettime(CLOCK_REALTIME, &tm);
#endif
return (((uint64_t) tm.tv_sec * 1000000000L) + tm.tv_nsec);
}
|
