c8d5859ff9ef22ea8b48c5d3429752342ed89120
[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 typedef uint64_t timer_t;
30 typedef int clockid_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 #define CLOCK_REALTIME CALENDAR_CLOCK
40 #define CLOCK_MONOTONIC SYSTEM_CLOCK
41
42 static inline
43 int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
44 {
45 int ret = 0;
46 clock_serv_t clock;
47 mach_timespec_t now;
48
49 if (clk_id != CLOCK_REALTIME && clk_id != CLOCK_MONOTONIC) {
50 ret = -1;
51 errno = EINVAL;
52 goto end;
53 }
54
55 host_get_clock_service(mach_host_self(), clk_id, &clock);
56
57 ret = clock_get_time(clock, &now);
58 if (ret != KERN_SUCCESS) {
59 ret = -1;
60 goto deallocate;
61 }
62
63 tp->tv_sec = now.tv_sec;
64 tp->tv_nsec = now.tv_nsec;
65
66 deallocate:
67 mach_port_deallocate(mach_task_self(), clock);
68 end:
69 return ret;
70 }
71
72 #else /* __APPLE__ */
73
74 static inline
75 int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
76 {
77 return clock_gettime(clk_id, tp);
78 }
79
80 #endif /* __APPLE__ */
81
82 #endif /* _COMPAT_TIME_H */
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