src/time/clock_settime.c

   1 #include <time.h>
   2 #include <errno.h>
   3 #include "syscall.h"
   4
   5 #define IS32BIT(x) !((x)+0x80000000ULL>>32)
   6
   7 int clock_settime(clockid_t clk, const struct timespec *ts)
   8 {
   9 #ifdef SYS_clock_settime64
  10         time_t s = ts->tv_sec;
  11         long ns = ts->tv_nsec;
  12         int r = -ENOSYS;
  13         if (SYS_clock_settime == SYS_clock_settime64 || !IS32BIT(s))
  14                 r = __syscall(SYS_clock_settime64, clk,
  15                         ((long long[]){s, ns}));
  16         if (SYS_clock_settime == SYS_clock_settime64 || r!=-ENOSYS)
  17                 return __syscall_ret(r);
  18         if (!IS32BIT(s))
  19                 return __syscall_ret(-ENOTSUP);
  20         return syscall(SYS_clock_settime, clk, ((long[]){s, ns}));
  21 #else
  22         return syscall(SYS_clock_settime, clk, ts);
  23 #endif
  24 }