src/common/compat/time.h

   1 /*
   2  * Copyright (C) 2016 Michael Jeanson <mjeanson@efficios.com>
   3  *
   4  * SPDX-License-Identifier: MIT
   5  *
   6  */
   7
   8 #ifndef _COMPAT_TIME_H
   9 #define _COMPAT_TIME_H
  10
  11 #include <time.h>
  12
  13 #ifdef __APPLE__
  14
  15 typedef uint64_t timer_t;
  16
  17 #include <mach/mach.h>
  18 #include <mach/clock.h>
  19 #include <errno.h>
  20
  21 #undef NSEC_PER_SEC
  22 #undef NSEC_PER_MSEC
  23 #undef NSEC_PER_USEC
  24 #undef USEC_PER_SEC
  25
  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
  31 typedef int clockid_t;
  32 #define CLOCK_REALTIME CALENDAR_CLOCK
  33 #define CLOCK_MONOTONIC SYSTEM_CLOCK
  34
  35 static inline
  36 int 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
  56         tp->tv_sec = now.tv_sec;
  57         tp->tv_nsec = now.tv_nsec;
  58
  59 deallocate:
  60         mach_port_deallocate(mach_task_self(), clock);
  61 end:
  62         return ret;
  63 }
  64
  65 #else /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
  66
  67 static inline
  68 int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
  69 {
  70         return clock_gettime(clk_id, tp);
  71 }
  72
  73 #endif /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
  74
  75 #endif /* _COMPAT_TIME_H */