zircon/third_party/ulib/musl/src/time/clock_gettime.c

#include <errno.h>
#include <stdint.h>
#include <time.h>
#include <zircon/syscalls.h>

#include "libc.h"
#include "threads_impl.h"

int __clock_gettime(clockid_t clk, struct timespec* ts) {
  uint32_t zx_clock;
  switch (clk) {
    case CLOCK_BOOTTIME: // see fxb/38552
    case CLOCK_MONOTONIC:
    case CLOCK_MONOTONIC_RAW:
      zx_clock = ZX_CLOCK_MONOTONIC;
      break;
    case CLOCK_REALTIME:
      zx_clock = ZX_CLOCK_UTC;
      break;
    case CLOCK_THREAD_CPUTIME_ID:
      zx_clock = ZX_CLOCK_THREAD;
      break;
    default:
      errno = EINVAL;
      return -1;
  }
  zx_time_t now;
  zx_status_t status = _zx_clock_get(zx_clock, &now);
  if (status != ZX_OK) {
    __builtin_trap();
  }
  ts->tv_sec = now / ZX_SEC(1);
  ts->tv_nsec = now % ZX_SEC(1);
  return 0;
}

weak_alias(__clock_gettime, clock_gettime);