Fix: waiter: futex wait: handle spurious futex wakeups
[lttng-tools.git] / src / common / compat / time.hpp
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1/*
2 * Copyright (C) 2016 Michael Jeanson <mjeanson@efficios.com>
3 *
ab5be9fa 4 * SPDX-License-Identifier: MIT
389fbf04 5 *
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6 */
7
8#ifndef _COMPAT_TIME_H
9#define _COMPAT_TIME_H
10
11#include <time.h>
12
13#ifdef __APPLE__
707de922 14
389fbf04 15typedef uint64_t timer_t;
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16
17#include <mach/mach.h>
18#include <mach/clock.h>
c9e313bc 19#include <common/compat/errno.hpp>
389fbf04 20
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21#undef NSEC_PER_SEC
22#undef NSEC_PER_MSEC
23#undef NSEC_PER_USEC
efef32e9 24#undef USEC_PER_SEC
395d6b02 25
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26#endif /* __APPLE__ */
27
28/* macOS/OS X 10.12 (Sierra) and up provide clock_gettime() */
29#if defined(__APPLE__) && !defined(LTTNG_HAVE_CLOCK_GETTIME)
30
31typedef int clockid_t;
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32#define CLOCK_REALTIME CALENDAR_CLOCK
33#define CLOCK_MONOTONIC SYSTEM_CLOCK
34
35static inline
36int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
37{
38 int ret = 0;
39 clock_serv_t clock;
40 mach_timespec_t now;
41
42 if (clk_id != CLOCK_REALTIME && clk_id != CLOCK_MONOTONIC) {
43 ret = -1;
44 errno = EINVAL;
45 goto end;
46 }
47
48 host_get_clock_service(mach_host_self(), clk_id, &clock);
49
50 ret = clock_get_time(clock, &now);
51 if (ret != KERN_SUCCESS) {
52 ret = -1;
53 goto deallocate;
54 }
55
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56 tp->tv_sec = now.tv_sec;
57 tp->tv_nsec = now.tv_nsec;
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58
59deallocate:
60 mach_port_deallocate(mach_task_self(), clock);
61end:
62 return ret;
63}
64
707de922 65#else /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
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66
67static inline
68int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
69{
70 return clock_gettime(clk_id, tp);
71}
72
707de922 73#endif /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
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74
75#endif /* _COMPAT_TIME_H */
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