clock_settime.c raw

   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  }
  25