49f5039084a79083c63eab538d1486aeeedd594a
[lttng-tools.git] / src / common / compat / time.h
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__
29
30 typedef uint64_t timer_t;
31
32 #include <mach/mach.h>
33 #include <mach/clock.h>
34 #include <errno.h>
35
36 #undef NSEC_PER_SEC
37 #undef NSEC_PER_MSEC
38 #undef NSEC_PER_USEC
39
40 #endif /* __APPLE__ */
41
42 /* macOS/OS X 10.12 (Sierra) and up provide clock_gettime() */
43 #if defined(__APPLE__) && !defined(LTTNG_HAVE_CLOCK_GETTIME)
44
45 typedef int clockid_t;
46 #define CLOCK_REALTIME CALENDAR_CLOCK
47 #define CLOCK_MONOTONIC SYSTEM_CLOCK
48
49 static inline
50 int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
51 {
52 int ret = 0;
53 clock_serv_t clock;
54 mach_timespec_t now;
55
56 if (clk_id != CLOCK_REALTIME && clk_id != CLOCK_MONOTONIC) {
57 ret = -1;
58 errno = EINVAL;
59 goto end;
60 }
61
62 host_get_clock_service(mach_host_self(), clk_id, &clock);
63
64 ret = clock_get_time(clock, &now);
65 if (ret != KERN_SUCCESS) {
66 ret = -1;
67 goto deallocate;
68 }
69
70 tp->tv_sec = now.tv_sec;
71 tp->tv_nsec = now.tv_nsec;
72
73 deallocate:
74 mach_port_deallocate(mach_task_self(), clock);
75 end:
76 return ret;
77 }
78
79 #else /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
80
81 static inline
82 int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
83 {
84 return clock_gettime(clk_id, tp);
85 }
86
87 #endif /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
88
89 #endif /* _COMPAT_TIME_H */
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