Fix: time constants already defined on macOS
[lttng-tools.git] / src / common / compat / time.h
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1/*
2 * Copyright (C) 2016 Michael Jeanson <mjeanson@efficios.com>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23#ifndef _COMPAT_TIME_H
24#define _COMPAT_TIME_H
25
26#include <time.h>
27
28#ifdef __APPLE__
707de922 29
389fbf04 30typedef uint64_t timer_t;
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31
32#include <mach/mach.h>
33#include <mach/clock.h>
df6a8b05 34#include <errno.h>
389fbf04 35
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36#undef NSEC_PER_SEC
37#undef NSEC_PER_MSEC
38#undef NSEC_PER_USEC
efef32e9 39#undef USEC_PER_SEC
395d6b02 40
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41#endif /* __APPLE__ */
42
43/* macOS/OS X 10.12 (Sierra) and up provide clock_gettime() */
44#if defined(__APPLE__) && !defined(LTTNG_HAVE_CLOCK_GETTIME)
45
46typedef int clockid_t;
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47#define CLOCK_REALTIME CALENDAR_CLOCK
48#define CLOCK_MONOTONIC SYSTEM_CLOCK
49
50static inline
51int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
52{
53 int ret = 0;
54 clock_serv_t clock;
55 mach_timespec_t now;
56
57 if (clk_id != CLOCK_REALTIME && clk_id != CLOCK_MONOTONIC) {
58 ret = -1;
59 errno = EINVAL;
60 goto end;
61 }
62
63 host_get_clock_service(mach_host_self(), clk_id, &clock);
64
65 ret = clock_get_time(clock, &now);
66 if (ret != KERN_SUCCESS) {
67 ret = -1;
68 goto deallocate;
69 }
70
71 tp->tv_sec = now.tv_sec;
72 tp->tv_nsec = now.tv_nsec;
73
74deallocate:
75 mach_port_deallocate(mach_task_self(), clock);
76end:
77 return ret;
78}
79
707de922 80#else /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
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81
82static inline
83int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
84{
85 return clock_gettime(clk_id, tp);
86}
87
707de922 88#endif /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
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89
90#endif /* _COMPAT_TIME_H */
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