17447b3724bee5ef4c0bf0a30a080317f40d7748
[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
35 #undef NSEC_PER_SEC
36 #undef NSEC_PER_MSEC
37 #undef NSEC_PER_USEC
38
39 #endif /* __APPLE__ */
40
41 /* macOS/OS X 10.12 (Sierra) and up provide clock_gettime() */
42 #if defined(__APPLE__) && !defined(LTTNG_HAVE_CLOCK_GETTIME)
43
44 typedef int clockid_t;
45 #define CLOCK_REALTIME CALENDAR_CLOCK
46 #define CLOCK_MONOTONIC SYSTEM_CLOCK
47
48 static inline
49 int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
50 {
51 int ret = 0;
52 clock_serv_t clock;
53 mach_timespec_t now;
54
55 if (clk_id != CLOCK_REALTIME && clk_id != CLOCK_MONOTONIC) {
56 ret = -1;
57 errno = EINVAL;
58 goto end;
59 }
60
61 host_get_clock_service(mach_host_self(), clk_id, &clock);
62
63 ret = clock_get_time(clock, &now);
64 if (ret != KERN_SUCCESS) {
65 ret = -1;
66 goto deallocate;
67 }
68
69 tp->tv_sec = now.tv_sec;
70 tp->tv_nsec = now.tv_nsec;
71
72 deallocate:
73 mach_port_deallocate(mach_task_self(), clock);
74 end:
75 return ret;
76 }
77
78 #else /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
79
80 static inline
81 int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
82 {
83 return clock_gettime(clk_id, tp);
84 }
85
86 #endif /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
87
88 #endif /* _COMPAT_TIME_H */
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